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W-20 Service Manual

1. U7 7 15 at gt V AIC1722 50CZL 6 1000 15V Q6 R26 104Z 2 3 2 i e ka 1 vi VO 5 ji 1225 EC12 GND CB C9 1 PA 5 EC10 77 R32 2 1 10uF 1 2 B z Soi tur 16V 1042 1042 k Ecn 2 13 6945 470U 16V R18 2M TX gt wur 16V 100R IK R21 09 7 1042 114148 R27 1 2 15K R33 1 4 7K A733 5 1 lt H L 1 ike BR R28 3 2 220R 5 SW2 2 3 4 Q7 CON 2P PW 7 7 LED BATTERY m D WD4 E 2930 5 T di 7 c16 A Na A M 1042 4027 U9B 1 3 VIN Wr wa GREEN 5 RED 4 4 AUTO OFF T GND 1042 2 1042 1 4 EC13 1 17 EIN 1042 2 R29 220uF 16V 470R R22 10K mz UB HT 7039 2 1 ouT gt LOBAT GND 3 R23 27 Description 1 AC Adaptor This AC Adaptor provides power for DC9 12V 500mA 2 Battery Built in Rechargeable Battery 6V 4Ah 21 Hov Battery is charged completely The charging voltage is regulated by Q8 C1061 and 201 8 2V for about 7 volts The charging current will god
2. O 45v SW2 5V P23 lt o 817 53 45 0 IOK 522 x j 1 VOUT VBATI l 05 SW4 GROSS NET 104Z VCC RESET og A VV id 4 gt 21 INI GND WDI Fz lt P17 4 517 PFO SW5 RB DC AC INVERTER SWS ELI gt RST P20 o o 4 A733 18R IN VIN VAZ OUT TV c x P23 AS SW6 06 END 89052 20P 6 0 MHz 40 D2 4148 2035 1 10uF 16V 1047 XTALI VDD EL 120X40MM 1 C35 EC2 p224 se D3 8 48 1DuF 16V 2 vss 20 1042 10uF 18V bit s r NUES 20P T 1 mu 4 XTAL2 D4 48 zt P17 P17 5V P21 ps 48 ES 1 a P16 Z AUTO OFF z O SW8 RST RESET P15 Fa 5 93046 D6 1 gt 4 RA PIA P14 i P20 lt b l 4K7 P13 BUSY 51 7 5 6 POO P125 CS SSK NCHS 64 CAL amp SET SWS R2 P01 P11 DI NC 1042 RD 6 6 4 1 4 5 lt 10K P02 P10 ANN DO GND R5 p E m RI K to POWER SCH sw1 ON OFF 22K aj POS P27 59 STROBE gt SCK swi 0 0 m BKLT ANN C945 P06 P26 BUSY 52 E P07 P25 LOBAT si P24 55 CLOCK RD P23 55 P23 ECB WR WR P22 5 P22 10uF 16V P21 21 P21 5V NRI E BKLT 4 TI P20 P20
3. J2 J4 5 X1 550 Eis OWES EL INI BZI 08 U4 Co J2 PRINTER 30 W20 50 X A D BOARD EOW20010000 A0203077300 A0206000072 A 702106010 A0710104101 A0710224101 A0720103101 A0730104050 A0 7740020050 A0750122050 A0803041002 A0803043001 A0804041000 A0804044701 A0805040105 A0901010060 A1005030512 A1007000001 A1100249152 A1202060301 F0015000004 F0015000005 Pate B s W20 50 X Le Cs AD7730BN Ets OP ZLITCP CAPACITOR TC 10uF 16V CAPACITOR MEF 0 1uF 100V 104 CAPACITOR MEF 0 22uF 100V 224 CAPACITOR PET Ou 111077 LOOV LOST CAPACITOR MLC 1042 CAPACITOR CC 20pF CAPACITOR CCFT 121191 METAL FILM RESISTOR 10PPM 10KQ 1 4W METAL FILM RESISTOR 10PPM 30KO 1 4W METAL FLIM ERBESISIOR 1000 1 41 METAL FILM RESISTOR 4 7KQ 1 41 100KO 1 41 6 PIN WAFFER CARBON FILE RESISTOR CONNECTOR FERRITE BEAD Deo OS LOT FERRITE CORE Lb l070 Z6min CRYSTAL 4 9 52482 WIRE ARRAY SINGLE HOUSING 6PIN 30cm A D PROTECTION BOX EM SERIES UPPER A D PROTECTION BOX EM SERIES UNDER N NON Fe F gt e N N N AD Ut 02 3 COF Goy LS 60769 God Olur rn ELO 1251 R5 Row b z RO 9 J2 1 7 PARTS EXPLOSION DE 92 92 22 87 S XK NN 97 72 96 8E OY 27 9L aL ZZ 12 ON 2 ill iii z T NO F0007PSP001 4 G0004DW0001 c
4. 2 3 2 Overall Dimension 250 W X 180 D X 1 70 8 Max 2 3 3 Technical Specifications PERFORMANCE 5 1 2 digit LCD 50 m m height 1 J Display iesolution upto 303000 divisions minimumot OMT div COLE DY L nen 30 LA 0 DU Display speed 25 times second Zero adjustment 2mV to 20mV Span adjustment 0 6 mV V to 4mV V full scale Zero e0 3u UV y Span 8ppm C Stability y Drift Linearity 0 0033 R O Noise 0 05H Vp p Operating Temperature 0 C 40 C 32 F 104 F environment Humidity gt 90 4 non condensing A D CONVERTER Type 24 bit Sigma Delta Resolution Up to 1 000 000 internal counts Conversion rate 50 times second RS 232C Baud rate transmission mode selectable Centronics type External display 2 3 4 Main Components Used Microprocessors 6952 Crystal Oscillatory MHZ Display Device WTN Liquid Crystal Display ACD converter AD7720 LED driver TE PD 72 25 2 4 OPTIONAL INTERFACE 2 4 1 Serial RS 232C Port D SUB 9 p n PIN ASSIGNMENT PIN NUMBER ASSIGNMENT olorteccroulted internally Data bits Db Die 0 Patrbv DIt Type EIA RS 232C Method Half duplex asynchronous transmission Format Baud rate 21300 000 1200 2400 4800 9000 OE 19200 Data bit Luo 8 Parity bit Even or None stop bat l Code ASCII Transmission mode 1 KPC KEYBOARD PRINT CONTROL 2 AUTO AUTO PRINT PER WEIGHING EVENT RESET BY RETURN T
5. 1042 5VA 5V U1 10 AD7730 Eo 9 Avbp 0 00 23 _ 7 EC 1 10uF 16V lt gt 2 EC2 AGND DGND 10uF 16V 22 STANDBY o 5V nn lt 420 our POL E 1 SYNE oc 5V P17 PSCLK RESET 7 veias KL AIN2 D1 ACXHS AIN2 D0 or 10 RDY o __ gt INTO 5VA AIN1 TANI 2 AIN1 AIN1 MCLK N 14 TEENY 5 503 17 REFIN MCLKOUT lid 4 194 MHz T0uF 16V 1042 ie HE 20P 20P AIN1 R6 a M100R 08 R5 M10K up 0 22uF 100V R7 MIOOR V AIN1 5VA Title Size Date YEVA R8 100K R9 100K W20 A D Drawing No W20 50 A3 88 12 03 sheet Drawn by la 3 l 4 s 6 r 8 1 OF 1 Revision 2 20 4 R25 O 0 x CLOCK B n 6010 nas AM TAM ECS q 9r I Y LES 11 E 68 OU 09 we C10 201 T R x R29 a 0 04 AM 8 EC13 m 25 20 5 62 y 9 m c 832 ca GND 024 25 26027 a RED GREEN 01 W10 10 4 i m 2 di 89 08 29 Us s lt WI Ae B 35 R5 46 R11 C18 7 J2 q BZ1 0 DIR C6 NW 8 6 50 45 40 GDF 314 be EC5 d 8 m 5 y R18 R20 8 015 AM AM m cm min in B 06
6. G0003PSP000 3 170014100620 G0005NBS000 500010 000 4 e0030000801 5 D0BS0500001 3 0904120090 A0904120251 ART NAME STEEL FIX PLATE SPECIFICATION PSP OFW SEIES 16xX2 506 AR 164 PSP OFW SEIES U SHAPE M6 12 2 XI 9x3mm OFW SERIES OFW SERIES 5 16 24UNFx20L NAME PLATE PC BS BW SERIES CONNECTOR D SUB 9PIN FEMALE CONNECTOR D SUB 202 Dob TYP 1 8 40UNC UT 1 8 40UNC INDICATOR FIX PLATE 5 5 SCREW RUBBER WASHER INDICATOR HOUSING UNDER ADJUSTABLE FEET ve Q UJ UJ rJ WIRE ARRAY A CEN 20000 Dm JACK SED I BATTERY WIRE ARRAY 2 PIN 35cm SINGLE HOUSING W20 50 X GP4 6 6V 4Ah A 1A0905600400 CONNECTOR 9 1204040250 A0906000210 A1208020351 E9W20000050 5 1600060400 9 F0007NBS102 AQ 20010001308 M3 8 TAPPED 42 E9W10000010 W10 10 X 46 1G0001705200 JINDICATOR HOUSING UPPER 1705L SERIES C1W10000000 PANEL PC W10 SERIES 200x78X2mm 01110010000 PANEL OVERLAY WI D SERIES 5 RECHARGEABLE BATTERY S S BATTERY CLAMP SCREW NBS SERIES FU HJ Q Q UJ UJ ED la ES 10 BR 14 ETE ETA 20 17 24 _ 26 28 m s EN s 38 40 42 46 wa IE 34 Features Compatible with MCS 51 Products 8K Bytes of In System Reprogrammable Flash Memory Endurance 1 000 VVrite Erase Cycles Fuliy Static Operation 0 Hz to 24 MHz Three level Program Memory Lock 256 x 8 bit int
7. Gain Drift vs Temperature Gain Drift vs Time 6 9 4 Bipolar Negative Full Scale Error Negative Full Scale Drift vs Temp Power Supply Rejection Common Mode Rejection CMR Analog Input DC Bias Current Analog Input DC Bias Current Drift Analog Input DC Offset Current Analog Input DC Offset Current Drift STATIC PERFORMANCE CHP 0 No Missing Codes Output Noise and Update Rates Integral Nonlinearity Offset Error Offset Drift vs Temperature Offset Drift vs Time Positive Full Scale Error Positive Full Scale Drift vs Temp 7 Positive Full Scale Drift vs Time Gain Error Gain Drift vs Temperature 9 Gain Drift vs Time Bipolar Negative Full Scale Error Negative Full Scale Drift vs Temp Power Supply Rejection Common Mode Rejection CMR on AIN CMR on REF IN Analog Input DC Bias Current Analog Input DC Bias Current Drift Analog Input DC Offset Current Analog Input DC Offset Current Drift ANALOG INPUTS REFERENCE INPUTS Normal Mode 50 Hz Rejection Normal Mode 60 Hz Rejection Common Mode 50 Hz Rejection Common Mode 60 Hz Rejection Analog Inputs 7 6 Differential Input Voltage Ranges Absolute Common Mode Voltage Reference Input REF IN REF IN Absolute Common Mode Voltage REF IN Voltage REF IN Voltage NO REF Trigger Voltage 2 3 Alp 5 V DVpp 3 V or 5 V REF IN AVpp REF IN AGND DGND 0 V fox 4 9152 MHz Al
8. IN 0 V or DVpp AVpp DVpp 5 V Digital IPs V or DVpp All Input Ranges Except 0 mV to 10 mV and 10 mV Input Ranges of 0 mV to 10 mV and 10 mV Only Typically 50 uW External MCLK IN 0 V or DVpp 39 INPUT CHOPPING THE ANALOG INPUT TO THE PART CAN BE CHOPPED IN CHOPPING MODE WITH AC EXCITATION DISABLED THE INPUT CHOPPING IS INTERNALTO THE DEVICE IN CHOPPING MODE WITH AC EXCITATION ENABLED THE CHOPPING 15 ASSUMED TO BE PERFORMED EXTERNAL TO THE PART AND NO INTERNAL INPUT CHOPPING IS PERFORMED THE INPUT CHOPPING CAN BE DISABLED IF DESIRED SEE PAGE 26 SINC FILTER THE FIRST STAGE OF THE DIGITAL FILTERING ON THE PART IS THE SINC FILTER THE OUTPUT UPDATE RATE AND BANDWIDTH OF THIS FILTER CAN BE PROGRAMMED IN SKIP MODE THE SINC3 FILTER IS THE ONLY FILTERING PERFORMED ON THE PART SEE PAGE 26 IN SKIP MODE THERE IS NO SECOND STAGE OF FILTERING ON THE PART THE SINC3 FILTER 15 THE ONLY FILTERING PERFORMED ON THE PART AD7730 AD7730L SKIP MODE 22 TAP FIR FILTER IN NORMAL OPERATING MODE THE SECOND STAGE OF THE DIGITAL FILTERING ON THE PART IS A FIXED 22 TAP FIR FILTER IN SKIP MODE THIS FIR FILTER IS BYPASSED WHEN FASTSTEP MODE IS ENABLED AND A STEP INPUT IS DETECTED THE SECOND STAGE FILTERING IS PERFORMED BY THE FILTER UNTIL THE OUTPUT OF THIS FILTER HAS FULLY SETTLED SEE PAGE 29 SEE PAGE 27 SKIP ANALOG o CHOP BUFFER SIGMA DELTA SINC3 FILTER CHOP 22 TAP OUTPUT DIGITAL
9. MOVE CURSER RIGHT BY PRESSING ZERO TARE NET GROSS PRINT DIV COUNTS Er 12275 04209509 Ct e gt T MINIMUM DIVISION SELECT DIV BY PRESSING ZERO OR TARE 4 0 0 0 00 0 000 gt 5777 SELECT POSITION QE PRESSING ZERO OR TARE OP POSITION OF DECIMAL POINT L 3 1 3 Calibration Procedures SET SET gt LE DISPLAY 1 Remove all loads form platform and wait until the MOTION INDICATOR goes off 2 Press SET 3 Indicator displays caL 4 Wait until MOTION INDICATOR goes off 5 Press SET 6 Indicator displays then LoAd 7 Indicator display 00000 8 Place a constant load vith knovn veight value the heavier the better onto the platform 9 Enter the weight of load applied by means of the ZERO TARE GROSS NET and PRINT key 10 Wait until MOTION INDICATOR goes off 11 Press SET TO CONFIRM ENTRY 12 Indicator displays and chen 4 P in for PASSWORD SETUP or press ESC to quit and return to normal Operation status 4 Pin 13 1f any caution appears please find paragraph of ERROR CODES AND DESCRIPTION to do further check 16 3 1 4 PASSNORD SETUP PROCEDURES STEP DISPLAY 1 If calibration procedures is completed indicator will display 4 Pin 4 23 2 Press SET E 3 Indicator displays 00000 4 Enter the desired password by means of the ZERO TARE GROSS NET and PRINT key 5 Passwo
10. NUMBER ASSIGNMENT 3 s 1 3 4 o oom SIG SIG Pin 5 is ground 10 3 INITIAL SETUP 3 1 INTERNAL FUNCTIONS AND SETTING METHODS INTERNAL FUNCTION FLOW CHART 1 When password function disable this selection will not appear 2 If indicator is protected by password enter correct password in order to access menu 3 amp 4 5 HOW TO ENTER THE REQUIRED FUNCTION AND PARAMETER SETTING qum MG mea or sii Power on 11111 Press M SET while W10 symbol appears Indicator displays internal A D counts Press M SET again Select desired menu to access by Pressing ZERO Enter Sub menu by Pressing M SET Quit the function setting by pressing MC ESC D Ox Oo 3 1 1 Setting Basic Parameters SET 1 PAr 0 2 O tr trA mo L mo d i 0 OF RATED CAPACITY ON RATED CAPACITY 1 4 OF RATED CAPACITY ZERO RANGE 10 OF RATED CAPACITY DEFAULT 200 OF RATED CAPACITY 100 OF RATED CAPACITY DISABLE 120 DIVI SEC DEFAULT CO pe A 7 0 DI SEC AUTO ZERO TRACKING RANGE rv O AM division n x 0 5d time anterval m x 0 5s MB Dive SO UEFA DISABLE ZERO TRACKING ANYWHERE ENABLE DEFAULT A SYMBOL DEFINITION SETTINGS D sc ve dub SECOND Oga 052 SECOND Dau dem 0 Duo SECOND 1 1 SECOND DEFAULT MOTION TRACKING TIME INTERVAL 0
11. PEUT MODULATOR FIR FILTER SCALING r FASTSTEP FILTER OUTPUT SCALING THE OUTPUT WORD FROM THE DIGITAL BUFFER THE INPUT SIGNAL IS BUFFERED ON CHIP BEFORE BEING APPLIEDTO THE SAMPLING CAPACITOR OF THE SIGMA DELTA MODULATOR THIS ISOLATES THE SAMPLING CAPACITOR CHARGING CURRENTS FROM THE ANALOG INPUT PINS PGA SIGMA DELTA MODULATOR THE PROGRAMMABLE GAIN CAPABILITY OF THE PART IS INCORPORATED AROUND THE SIGMA DELTA MODULATOR THE MODULATOR PROVIDES A HIGH FREQUENCY 1 BIT DATA STREAM TO THE DIGITAL FILTER SEE PAGE 26 OUTPUT CHOPPING THE OUTPUT OF THE FIRST STAGE OF FILTERING ON THE PART CAN BE CHOPPED IN CHOPFING MODE REGARDLESS OF WHETHER AC EXCITATION IS ENABLED OR DISABLED THE OUTPUT CHOPPING IS PERFORMED THE CHOPPING CAN BE DISABLED IF DESIRED FILTER IS SCALED BY THE CALIBRATION COEFFICIENTS BEFORE BEING PROVIDED AS THE CONVERSION RESULT SEE PAGE 29 FASTSTEP FILTER WHEN FASTSTEP MODE IS ENABLED AND A STEP CHANGE ON THE INPUT HAS BEEN DETECTED THE SECOND SEE PAGE 24 SEE PAGE 26 STAGE FILTERING IS PERFORMED BY THE FASTSTEP FILTER UNTIL THE FIR FILTER HAS FULLY SETTLED SEE PAGE 29 Figure 3 Signal Processing Chain PIN CONFIGURATION MCLK IN 2 DVpp MCLK OUT 3 22 DIN POL 4 21 DOUT SYNC RDY E AD7730 RESET 6 119175 TOP VIEW Veias 7 Not to Scale PIN FUNCTION DESCRIPTIONS Function Mnemonic Serial Clock Schmitt Trigger
12. 0 P2 7 P0 0 7 RE RR RE RE RR RE RE RR BB BB RR RR BB BR BR RE BB RE RR BB RR BB BR RR BR RR RR RR RR RR RR RR RR RR RR RR e e RR RR RR OR RR RR RR ee i o le gs E u e e Ma jis E Abe E 28 si bi amp o ez He 00 li ES gt E ES gt eo x l 3 EO 6 pf gt 03 EL 9 5 1 9 88 zm c 2 o 9 5 3 O r 0 2 sf n a u lt P3 0 P3 7 P1 0 P1 7 AT89C52 mer 36 ANALOG DEVICES KEY FEATURES Resolution of 230 000 Counts Peak to Peak Offset Drift 5 nV C Gain Drift 2 6 Line Frequency Rejection gt 150 dB Buffered Differential Inputs Programmable Filter Cutoffs Specified for Drift Over Time Operates with Reference Voltages of 1 V to 5 V ADDITIONAL FEATURES Two Channel Programmable Gain Front End On Chip DAC for Offset TARE Removal FASTStep Mode AC or DC Excitation Single Supply Operation APPLICATIONS Weigh Scales Pressure Measurement GENERAL DESCRIPTION The AD7730 is a complete analog front end for weigh scale and pressure measurement applications The device accepts low level signals directly from a transducer and outputs a serial digital word The input sig
13. 05 4 03 02 D1 P9 P74 P6 P75 P3 W10 10 4 TOP OVERLAY W20 50 2 TOP LAYER W20 50 2 BOTTOM LAYER St 1 C RI J C15 al CD 69 A L7 INTI 2 18 INTO P17 Cn Ul Ji R6 C12 E 2 013 T W20 50 2 R7 08 89 05 16 W20 50 2 TOP OVERLAY 28 6 BILL OF MATERIAL STRUCTURE Parts No Description Specification Qty Remark A0905600401 CONNECTOR PLT 164 P 1 A0905600400 CONNECTOR PIT 164 R 1 A0906000210 D C JACK SCD 021 1 212040400 NIRE ARRAY 4 PIN 25cm 1 ALZO SUZ O35 BATTERY WIRE ARRAY 2 PIN SSecm SINGLE HOUSING 1 A1600060400 RECHARGEABLE BATTERY GP4 6 6V 4Ah 1 DIU E EE IE A ADAPTOR XkXV OV 500mA 1 CIN10010000 PANEL OVERLAY WLO SERIES 1 C1W10000000 PANEL PC W10 SERIES 200x78x2 mm l E9W10000010 EBU W LO T0 X 1 E9W20000050 pot 2 W20 50 X 1 FOOOTNBS 102 S S BATTERY CLAMP NBS SERIES 1 0001705200 INDICATOR HOUSING UPPER 1705L SERIES 1 G0001OFW000 INDICATOR HOUSING UNDER OFW SERIES 1 G0003PSP000 INDICATOR FIX PLATE PSP OFW SEIES U SHAPE 1 G0030000801 ADUUSTABLE FEET OFW SERIFS 5 16 24UNFx20L 2 INDICATOR G0005NBS000 RUBBER WASHER 27xU 9x3mm 2 FOOO7PSPOO1 SIEEL FIX PLATE PSP OFW SEIES 1 GOOOADWOOO01 RUBBER PAD 16x3 5t AR 167 4 DW SERIES W10 10 X MAINBOARD EOWI0000010 EC GB W10 10 X 1 A0202093461 0 93046 L U2 A0204074042 5 74 04 l Di OP 5 OPTION A0205040270 D 4027 1 113 OZ Oe e VOLTAGE REGULATOR 1 C Z950 50 1 U11 0207017220 VOLTAGE REGULATOR ALCL 722 5106 2 1
14. 07 A0208072250 Lc UP 7225 1 US A0203002322 ET MAX232CPE 571110 A0250070390 u HT7039A 2 US A0300000040 Lats SOCKET 40 PIN ho ST A0201089521 D 556 T 201 A0102000289 Ties CoD LCD G289 k LEDI A0401007330 TRANSISTOR 2oAT33 2 02 07 A0401009450 TRANSISTOR 25C945 woe DIO A0401010610 TRANSISTOR HLUCLC OR 10880 1 Q8 A0401015150 TRANSISTOR A1515 1 04 A0501004148 DIODE 1N4148 T D1 0 D9 A0502000001 BRIDGE RECTIFIER W04 1A 1 BR A0503020082 ZENER DIODE 1 2W 8V2 9A3 1 2101 A0701106017 CAPACITOR EC 10uF 16V SS TYPE 8 1 4 ECS 9 pO A0701108016 CAPACITOR EC 1000uF 16V 1 X A0701220017 CAPACITOR EC 220uF 16V SS TYPE 1 EC A0701477017 CAPACITOR EC 470uF 16V SS TYPE 1 ECLO 29 0702105035 A0730104050 AU 7740020050 A0740101050 A0802047309 A0804042702 A0805020120 A0805021101 A0805041102 A0805041103 A0805041104 A0805041105 A0805041153 A0805041180 A0805041183 2608050415 A0805041221 A0805041203 A0805041223 A0805041273 0805041334 A0805041471 A0805041472 A0625050000 A0901010040 A0901010060 A0902010020 1100211059 1202060301 0904120090 1306000003 1400000006 1401005120 1500000004 A5004000003 CAPACIT CAPACIT CAPACIT CAPACIT OK EC OR MLC OR CC OR EC RESISTOR NETWORK METAL FILM RESISTOR CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON Die D CONNECT CONNECT CONNECT
15. 24 CON 2P PW C12 1000 16V C1D61TT n 05 R26 2 128 25 1008 945 po A R27 1N4148 Ne A733 1 R28 lt Y 220R e 2 07 201 A HN 0 LED CN Wa An a GREEN RED R29 470R 2VIN 5610 LU 470U 16V 15 1K 1 sWi lt 2 J5 SW2 CON 2P PW TO BATTERY 19 1 R20 2M Q4 1047 A1515 NL 832 10K R21 1M 4027 U9B lt AUTO OFF C17 1042 R33 4 7K 7 gt v AIC1722 50CZL Wet liv vol EC12 8 GND 9 2 10uF 15V 1042 1942 ECM 10uF 16V 6 2930 5 5VA 1 2013 zm 21 220uF 16V R22 10K UB HT 7039 R23 27K Title W10 POWER Drawing No W10 10 Size 3 Sheet Date 89 08 25 la 3 1 4 s s 7 sm _ V Revision 4 2 OF 2 Drawn by Eas L C1 LOAD_CELL 5 L3 L1 L2 S5 C2 C C3 pL I C18 C 0 22U 10 5MM 103J 100V MEF 103J 100V MEF g 0P07 1 5 1042 103J 100V MEF cie
16. 3 mo 1 MOTION DETECTION DIVISION RANGE e OOO 9 8 9 8 DIVISION 3 300 BPS 6 600 BPS 2 1200 BPS 4 2400 BPS 6 4800 BPS 19 2 19200 BPS KPC KEYBOARD PRINT CONTROL WEIGHT DATA WILL BE SENT BY PRESSING PRINT KEY OL BAUD RATE 1 AUTO AUTO PRINT WHEN CONSTANT WEIGHT modE IS DETECTED PER WEIGHING EVENT COMMUNICATION MODE CMD COMMAND RESPONSE MODE INITIATE DATA TRANSMISSION BV GIVING A COMPUTER COMMAND SM STREAM MODE CONTINUOUS TRANSMISSION DEFAULT ut WEIGHT UNIT Lo SYMBOL DEFINITION SETTINGS O PRINT KEY HAS NO FUNCTION M KEY CAN PRINT PRESS MC TO PRINT ACCUMULATED VALUE AND CLEAR IT FROM MEMORY AT THE SAME TIME 1 PRINT KEY HAS FUNCTION M KEY DOES NOT PRINT Pros EACH WEIGHING CAN PRINI ONCE THE WEIGHT SHOULD RETURN TO ZERO THEN WE LGA AGAIN TO ATTAIN NEXT PRINT Penk PRINTER CONTROL Prnt 0 Press M weighing data is printed out as below SERIAL NO SPACE WEIGHT DATA 8 DIGITS UNIT Press MC Accumulated value is printed out COUNT OF ACCUM SPACE WEIGHT DATA 8 DIGITS UNIT punc Press PRINT veighing data 38 printed out as belov CA LE 1 HEADER 1 HEADER 2 WEIGHT DATA 8 DIGITS UNIT 14 3 1 2 Setting Capacity And Division SET SYMBOL DEFINITION SETTINGS USER PROGRAMMABLE DISPLAY RESOLUTION MENS DEV PULL CAPACITY gt 1730000 FULL SCALE RANGE INCREASE DECREASE MOVE CURSER LEFT
17. 47K 9P 821 ao a 08015219 INTI INT 56 00 21 g9 INTO INTO mb s J2 gaENT30 gt ZZ BOS 0 0 3 5 TXD D ALE PROG m CON 5P WF RXD D 22 1 RD be 1 INTI LOBAT RX US 2 1 P20 P23 UPD7225 3 DIR P21 P22 4 DSR TOV munu 5 6 TX EC6 EC5 SEG20 tuF 16V 016 1uF 16V T TO RS 232 to 41 E 2 m 5 02 4 1 TO 08 5 TX lt T10UT Ha TXD 754120UTT2IN H2 COML0 31 T R3 47K RX RIDUT gt RXD 74HCD4 3 S28 GENS 5 LCD 6289 DTR 2 R2INR20UT fis 2 48 1529 COM2 n P Bvt VCD O 5v 118 3 48 1530 COMI DCD 4 AMAN V GND 4 J7 50 COMO R15 4 7K 3 4 al NC EC7 IZ 32 CLOER i CON 4P WF olx Diels R14 2 File o alo SEGLI7 21 5VA A VV A 1 EC4 04 P 1 sis TS 10uF 16V 7440374 5 INT1 2 8 20 1042 1 uF 16V INTO 3 TO A D O NET VCC n t 0 P17 45V 5V WR Ook lio 5 J6 on CON 6P WF R10 STROBE 10K 15K Title 7 NANA WN 3D 30 H 2 Ji POWER 02 Bb E 5 2 sw2 gt sw2 5 Di 2D 20 5 5 VIN VIN 1 019 IB 14 04 20 2 SW1 SW1 104Z X 1047 1042 05 D MZ 7 LOBAT LOBAT D 40 44 72 8 AUTO FF AUT0 FF GND l l Drawing No Revision DI0 71 0 BUSY lt W 1 0 Sa 1 0 4 TO PRINTER 172 E Size A Sheet of 2 Date 89 08 25 Drawn by 5 1 SCHEMATICS 7 8 5 ELECTRICAL CIRCUITRY
18. CRYSTAL WIRE ARRAY SINGLE HOUSING CONNECT PLE PF TELE PELE FILE FILE FILE FILE PELE PLE EIE ETE FIGE BITE FILE FP LTE ELGE OR OR OR OR TACI SW BACK LI GHT RESISTOR RESISTOR RES LS TOR RES LIS TOR RESISTOR RESISTOR RESISTOR RESISIOR RESIS TOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR BACK LIGHT INVERTER BUZZER HEAT SI NK luF 35V 1042 20pE 100pF 101 47K 9 PIN 27K 1 4W 1 20 1 20 1000 1 20 1KO 1 4W 10KO 1 4W 100KO 1 4W 11462 1 4W 15KO 1 4W 180 1 4W 18KQ 1 4W 21462 1 4W 2200 1 4W 20KO 1 40 22KO 1 40 27KQ 1 4W 33 62 1 4W 4700 1 4W 4 00 1 4 ROUND 5mm RED GREEN 4 PIN NAFER 6 PIN WAFFER 2 PIN WAFER PITCH 3 9mm 11 0952MHZ 1104 EL 13044 134 44mm TO I20V OBO 52 0 MB 207520 W10 10 X MAINBOARD PRINTER OPTION A0204743742 A0730104050 0901010120 212502510 Iu CAPACIT CONNECT OR MLC OR JA QSTA 1042 12 PIN WAFFER WIRE ARRAY SINGLE HOUSING DSUB 25PIN 6PIN 30cm D SUB 9PIN FEMALE FP FP e FP OQ O FT FP e FP N FP P RP N TN EC5 7 EC14 dii 19 19 29 ele 6246 NRI R23 R26 R25 R1 R7 R18 RO RU SRIS RADA R37 RIS R21 R27 R8 RTS R20 R28 R43 R5 6 R23 R9 R29 R RILA RS 9 LED q 31
19. MAINTENANCE MANUAL W20 INDICATOR SERIES CONTENTS 1 INTRODUCTION 2 SPECIFICATIONS BEI N N N N O1 SIS TEM BLOCK DIAGRAM PHYSICAL LAYOUT OF ELECTRICAL CONNECTION ENERAL Sem IRETCATIONS OPTIONAL INTERFACE LOAD CELL CONNECTION 3 INITIAL SETUP Su d INTERNAL FUNCTIONS AND SETTING METHODS 4 TROUBLE SHOOTING 4 1 1 2 TROUBLE SHOOTING LOOP PARTS AND COMPONENTS TROUBLE SHOOTING 5 ELECTRICAL CIRCUITRY ow dL SCHEMATICS PCB LAYOUT 6 BILL OF MATERIAL 7 APPENDIX Jan 2005 REV 1 Specifications and Function Subject to Change without Notice 1 INTRODUCTION This maintenance manual contains of certain information that may result in fraudulent use Do not release any part of this manual to any end users or un authorized persons Built in Pass Nord configuration to prevent un authorized settings or alternations After servicing it is necessary to go through all tests and procedures to ensure the scale meets all the meteorological and approval requirements Here are some features of the W20 series Zero indicator Tare indicator Negative value indicator Subtractive tare function Power on zero function Manual zero function 5 1 2 x 25mm wide angle LCD digits Dual power By built in rechargeable battery and external AC DC power adaptor 9 Low battery warning signal 10 Dual color charge status indicator LE ULL digital Calibration 12 AC DC power adap
20. O ZERO BAND lt 100 div 3 SM STREAM MODE CONTINUOUS TRANSMISSION 4 CMD COMMAND MODE REFER TO 3 1 1 Setting Basic Parameters Command Mode Transmission READ CR LF ASCII CODE CRE 0 ID IGRI 1 gt HEADER 1 HEADER 2 WEIGHT DATA 8 DIGITS UNIT Data Format Formatl m x CR uF HEADER 1 HEADER 2 WEIGHT DATA 8 DIGITS UNLT Format2 HEADER 1 HEADER 2 WEIGHT DATA 8 DIGITS UNIT HEADER 1 HEADER 2 Unt iO0verlioad NT Ne weight REO ST Stable GS Gross weight US Unstable 2 4 2 Parallel Printer Interface D SUB 25 pin PIN ASSIGNMENT PIN NUMBER ASSIGNMENT STROBE D1 D2 D4 7 2 4 3 External Display Interface Circular connector 4 pin PIN ASSIGNMENT PIN NUMBER ASSIGNMENT FOV DATA CLOCK GND 2 4 4 Backlight Interface Operation procedures 1 After power on select backlight function by pressing and hold ZERO Bl on1 gt The backlight will be turned off when constant zero weight is detected and remains stable for about 20 4 seconds Backlight will be automatically turned on again when a different weight is detected Bl on2 gt The backlight will be always turned on Bl oFF gt The backlight will be always turned off 2 When the desired setting appears release ZERO key 3 The backlight function will be employed right away 2 5 LOAD CELL CONNECTION Circular connector 4 pin PIN ASSIGNMENT PIN
21. ation Symbad Funcilon System clock output 2 SYNC Synchronization por 3 5 Vi or LCD bias voltage supply inputs Yucog 6 Vss Ground 7 33 Power 6 SCK Serial clock SI Serial inpul x 55 Chip select BUSY Busy oulpul 12 Command or data Selec input 13 RESET Reset mout 14 NC No connection 15 18 COMp COM y LCD backpiane driver outputs 19 32 34 51 59 95 LCD segment drives outpuls 52 CL1 System clock input 41 36 V A 26 0 PITCH 15 8X5 79 0 3 0 3 5 PITCH 158 4 632 DU NOT SCALE TH S DRAW REv DATE BY JMODEL C289 CUS DWG ND Mes UWE URT 1711D 0 SCALE UNIT DATE APPROVAL CHECK DRAVN U te 50 42 aa AF A AA ARZ LO SEGMENT REV T DATE gy 1 00 F 6289 SCALE UNIT DATE APPROVAL CHECK DRAWN 22 157 1771 VZ sm 43 RR 1 2 1140 3 35 R 31 60 661 AA CAM SAO AM IvADYdSY 31v 0 TILT LUN ang 02 Lf AdNys PF VM NAvad 32243
22. ed Logic Input An external serial clock is applied to this input to transfer serial data to or from the AD7730 T his serial clock can be a continuous clock with all data transmitted in a con tinuous train of pulses Alternatively it can be a noncontinuous clock with the information being transmitted to or from the AD7730 in smaller batches of data Master Clock signal for the device This can be provided in the form of a crystal resonator or external clock A crystal resonator can be tied across the MCLK IN and MCLK OUT pins Alternatively the MCLK IN pin can be driven with a CMOS compatible clock and MCLK OUT left unconnected The AD7730 is specified with a clock input frequency of 4 9152 MHz while the AD7730L is specified with a clock input frequency of 2 4576 MHz MCLK IN REV A 7 40 uPD7225 CMOS Intelligent Alphanumeric LCD Controller Driver Description The 225 is an intelligent peripheral device signed to interface most microprocessors with a wide variety of alphanumeric LCDs It can directly drive any Static or multiplexed LCD containing up lo 4 backplanes and up to 32 segments and is easily cascaded for larger LCD applicalions The PD7225 communicates with a host microprocessor through an 8 bit serial interface it includes a 7 segment numeric and a 14 segment alpha numeric segment decoder to reduce system software requirements The uPD7225 is manufactured with a low power consumption CMOS proc
23. ernal RAM 32 Programmable 1 0 Lines Three 16 bit Timer Counters Eight Interrupt Sources Programmable Serial Channel Low power Idle and Power down Modes Description The AT89C52 is a low power high performance CMOS 8 bit microcomputer with 8K bytes of Flash programmable and erasable read only memory PEROM The device is manufactured using Atmel s high density nonvolatile memory technology and is compatible with the industry standard 80C51 and 80C52 instruction set and pinout The on chip Flash allows the program memory to be reprogrammed in system or by a conventional nonvolatile memory programmer By combining a versatile 8 bit CPU with Flash on a monolithic chip the Atmel AT89C52 is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications Pin Configurations PQFP TOFP _ sr EE 3333 11111 LI 1151111 2399298859853 15 11 33 1 PO 4 AD4 Pi6 2 32 205 ADS P1703 31 D P0 5 ADE RSTL 4 30 D P0 7 AD7 RXD P3 0 C 5 29 0 EANPP NC 28 D NC mo P3 1 C 7 ALE PROG INTO P3 2 Cj 8 26 D PSEN NT1 P3 3 C 9 2513 P2 7 A15 TO P34 C 10 24 P2 8 A14 iT1 P3 5 Lj 11 23 P2 5 A13 qu o a lt da P3 7 C WR 6 C s 8 bit Microcontroller with 8K Bytes Flash AT89C52 Rev 0313H 02 00 35 Block Diagram P2
24. ess allowing use of a single power supply between 2 7 V and 5 5 V It is availa ble in space saving 52 pin plastic flat package Features O Singte chip LCD controller with direct LCD drive 3 Low cost serial interface to most microprocessors O Compatible with segment numeric LCO configurations up to 16 digits 14 segment alphanumeric LCD configurations up to 8 characters Selectable LCO drive configuration Static biplexed triplexed or quadruplexed 32 segment drivers Cascadable for larger LCD applications Selectable LCD bias voltage configuration Static t 2 or 1 3 Hardware logic blocks reduce system software requirements B bil serial interface Tuvo 32 x 4 bit static RAMs for display data and blinking 03156 8 Programmable segment decoding capability 16 character 7 segment numeric decoder 64 character 14 segment USASCII alphanumeric decoder Programmable segment blinking capability Automatic synchronization of segment drivers with sequentially multiplexed backplane drivers Single power suppiy variable from 2 7 V to 5 5 V Low power consumption CMOS technology Extended 40 C to 85 temperature range available 000 00 Ordering information Mir Frequency Package Type of Operation 2 pin plastic miniftat 1 MHz Part Number 072256 00 Pin Configuration TT si TI 52 LU Fs Y coy IL gt AFSE Pin Identific
25. heck whether LCD is broken 2 4 2 4 CPU Checking 4 2 4 1 Check that all pins are seated properly into the socket 4 2 4 2 Check that the Crystal Oscillator vorks 4 2 4 3 Check the RESET 15 normally lov 4 2 5 A D Unit Checking 4 2 5 1 Check that the 5VA power is correctly fed to the AyD Unit 4 2 5 2 Check that the signal output of loadcell is adequate 4 2 5 3 Check OP amplifiers amp A D converter AD7730 When no error is found with the above checking procedures the trouble can be caused by the load cell or the PCB itself Replace a new one could be better to identify the defectiveness Inthis way the readout of weight would be varied because of the output voltage of loadcell and different span value so re calibration is necessary after this replacement 23
26. l specifications to Tmax unless otherwise noted 24 See Tables I amp II 18 See Note 3 5 25 See Note 2 10 See Note 2 10 See Note 2 120 120 50 100 10 50 24 See Tables HI amp IV 18 See Note 3 See Note 3 0 6 3 See Note 3 2 10 See Note 3 0 6 90 100 120 60 150 30 0 to 10 or 10 0 to 20 or 20 0 to 40 or 40 O to 80 or 80 AGND 1 2V AVpp 0 95 V 2 5 AGND 30 mV AVpp 30 mV 0 3 Bits min ppm of FSR max nV C typ nV 1000 Hours typ ppm of FS C max ppm of FS 1000 Hours typ ppm C max ppm 1000 Hours typ ppm of FSPC max dB typ dB min max pA C typ nA max pA C typ Bits min ppm of FSR max uV C typ uV 1000 Hours typ uV C typ uV 1000 Hours typ ppm C typ ppm 1000 Hours typ uV C typ dB typ dB typ dB typ nA max pA C typ nA max pA C typ dB min dB min dB min dB min mV nom mV nom mV nom mV nom V min V max nom nom min max min max Offset Error and Offset Drift Refer to Both Unipolar Offset and Bipolar Zero Errors Measured with Zero Differential Voltage At DC Measured with Zero Differential Voltage SKIP 0 Offset Error and Offset Drift Refer to Both Unipolar Offset and Bipolar Zero Errors Measured with Zero Differential Voltage At DC Measured with Zero Differential Voltage At DC Measured with Zero Differential Voltage From 49 Hz to 51 Hz From 59 Hz to 61 H
27. nal is applied to a proprietary pro grammable gain front end based around an analog modulator Bridge Transducer ADC AD7730 AD7730L The modulator output is processed by a low pass programmable digital filter allowing adjustment of filter cutoff output rate and settling time The part features two buffered differential programmable gain analog inputs as well as a differential reference input The part operates from a single 5 V supply It accepts four unipolar analog input ranges 0 mV to 10 mV 20 mV 40 mV and 80 mV and four bipolar ranges 10 mV 20 mV 40 mV and 80 mV The peak to peak resolution achievable directly from the part is 1 in 230 000 counts An on chip 6 bit DAC allows the removal of TARE voltages Clock signals for synchro nizing ac excitation of the bridge are also provided The serial interface on the part can be configured for three wire operation and is compatible with microcontrollers and digital signal processors The AD7730 contains self calibration and system calibration options and features an offset drift of less than 5 nV C and a gain drift of less than 2 ppm C The AD7730 is available in a 24 pin plastic DIP a 24 lead SOIC and 24 lead TSSOP package The AD7730L is available in a 24 lead SOIC and 24 lead TSSOP package NOTE The description of the functions and operation given in this data sheet apply to both the AD7730 and AD7730L Specifications and performance parameters differ for the par
28. ortoseeiftheparity Of signal is reversed The platform device has been disturbed The value of span is too small Choose the proper value of span not less than OO Cb Vs The output signal of Load Cell is inadequate for span Calibration decrease the display resolution To change Load Cells with higher output signal 18 The input signal is too high over 30mV Replace new Load Cells with bigger capacity Load Cells were damaged To replace with new Load Cells Poor 26 02 GN To check the connector no 4 TROUBLE SHOOTING 4 1 TROUBLE SHOOTING LOOP POWER ON NO DISPLAY CHECK POWER SUPPLY CPU UCD KEYBOARD GHOST PROPER READOUT CHECK POWER SUEPIY B5 DG DRIVER IC RLS OK INCORRECT CORRECT READOUT RE SCAELBRATE THE INDICATOR NORMAL OPERATION DISPLAY RANDOM FIGURE CHECK CPU z BED ECD DRIVER IC CHECK LCD CONNECTORS LCD DRIVER IC UNSTABLE CHECK SIRUCIURE OF PLATFORM LOAD CELL A D UNIT BAD SOLDERING CAN T REACH THE FULL CAPACITY CHECK SIERUCTURE OE PLATFORM LOAD CELL OFFSET VALUE 20 4 2 PARTS AND COMPONENTS TROUBLE SHOOTING 4 2 1 Pover Supply Checking 4 2 1 1 Relevant parts Main Board W10 10 X 20 C1061 ZD1 8 2V BRI WO4 1A Q4 A1515 OG C945 R26 1 2 ohm 1 2W U9 IC 4027 Us HS 7055 U7 ATC 1722 50 U6 2930 5V DC JACK SCD 021 Q8 C1061T1 V N
29. ownautomaticallywhenvoltage reached Q6 C945 and R26 1 2R 1 2W provide Over Current protection 5VA power drives analog system including A D converter device LLE WT LSU U6 2930 5V is a svolts Voltage Regulator 5V power drives digital circuit systems U7 AIC 1722 50 is a 5volts Voltage Regulator 111 11 If the indicator is under LO BAT situation after fixed minutes CPU will launch a low to high pulse to trigger the U9 IC 4027 then 04 cuts off the indicator will be shut down immediately Low Power Detection The U8 HT 7039 is designed to detect the power level When battery voltage is less than 5 5V it will release a low potential signal to CPU and then Pu yi instruct LED display toshow LO BAT symbol 4 2 1 2 Input voltage 5 5V or higher Check and recharge battery if voltage less than 5 57 Check DC JACK or AC Adaptor if been defective 2 1 3 System voltage Vcc V 10 Check that the system voltage is within 5V 10 a less than 4 5V the CPU may not work properly b more than 6V ghost will appear on LCD 4 2 2 Platform Structure Checking The platter device shall not touch anything around itself during operation Check that the platter 38 not contacted with the upper no load and or lower with load stopper if equipped 4 2 3 LCD Display Checking 4 2 3 1 Check that it is soldered and connected properly between LCD and driver IC uED7225 driver IG uEPD7225 anda CPU 4 2 3 2 C
30. rd setup is completed and return to Normal operation status XXXXX NOTE 1 If password is set as 00000 then it has no access restrictions to any selections The O PAS selection will not appear on menu 2 In case password is forgotten contact your local agent or send unit back to manufacturer for assistance 3 Under password protection mode when passwordis not 00000 enter the password to access to menu 3 amp 4 Otherwise only menu 0 1 Z can be accessed 1 7 3 1 5 ERROR CODES AND DESCRIPTION ZERO CALIBRATION ERROR CODE DESCRIPTION AAAAA UUUUU Poor connection Po Check the Connector Wrong connection To check the Load Cell connector to see if the parity of signal is reversed The input offset voltage signal is too low To disconnect the power and insert a resistor around 100K 500Kohm between EXC and SIG terminals of Load Cell connector Load Cells were damaged To replace with new Load Cells Poor or Wrong connection To check the connector The input offset voltage signal istoohigh over 30mV The Load Cell capacity is too small or it 1S even dead Change new Load Cell with bigger Capacity Load Cells were damaged To replace with new Load Cells Thunderstorm damage To contact your local agent for assistance SPAN CALIBRATION ERROR CODE DESCRIPTION LLLLL g s The input signal becomes lover Check the Load Cell connect
31. tor Desk top stand and dust cover included 13 Pass vord configuration parameter setting protection 14 User Programmable display resolution up to 1 30000 LOBEL LCAR EL eS ta 16 Equipped with RS232 interface 17 Optional printer external display OP5 interface CO J O OI N 2 SPECIFICATION 2 1 SYSTEM BLOCK DIAGRAM LCD DRIVER INTERFACE CPI POWER SUPPLY KEYBOARD 1 AC ADAPTOR 9 KEYS 9V 500mA RECHARGEABLE BATTERY 6V 4Ah Description When an article is placed on the platter the load of the article is applied to the load cell inside the scale The resistance to the excitation current in the strain gauge will then changed and the analog output signal varies It is amplified and digitized continuously by the A D converter into a digital signal Subsequently the resulting count is processed and managed by the CPU TheCPUreferstothe instructions fromthe keyboard and then conveys the output data to LCD driver which formats the data into readout on the display panels 2 2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION DC JACK 6 LOAD CELL dh fin W20 50 X NW 7 D 10 0 uS b TE V 5 PIN A D BOARD CONNECTOR RECHARGEABLE BATTERY 6V 4 D SUB 25 FEMALE 0000000000000 000000000000 D SUB 9 FEMALE 00000 0000 Z FLAT AAS ia a dili PRINTER Ci MODULE O ol 5 9 9 9 9 9 MAIN BOARD
32. ts Specifications for the AD7730L are outlined in Appendix A FUNCTIONAL BLOCK DIAGRAM AVpp DVpp e VBIASQ AVpp REF IN REF IN AIN1 Q ANDBY E 1 10082 BUFFER SIGMA PROGRAMMABLE 1 DELTA DIGITAL O MODULATOR FILTER RE ETE SE E ES AIN2 D1 s 100nAC AA 2 AGND SERIAL INTERFACE Q MCLK OUT ee eS 02 SCLK CALIBRATION r mm MICROCONTROLLER DIN a AC EXCITATION oe ACXQ CLOCK AGND FASTStep is a trademark of Analog Devices Inc REV A nformation furnished by Analog Devices is believed to be accurate and reliable However no responsibility is assumed by Analog Devices for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of Analog Devices One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 World Wide Web Site http www analog com Fax 781 326 8703 Analog Devices Inc 1998 77 AD7730 SPECIFICATIONS Parameter STATIC PERFORMANCE CHP 1 No Missing Codes Output Noise and Update Rates Integral Nonlinearity Offset Error Offset Drift vs Temperature Offset Drift vs Time Positive Full Scale Error Positive Full Scale Drift vs Temp 5 Positive Full Scale Drift vs Time Gain Error
33. urrent Standby Mode Power Dissipation Normal Mode Standby Mode REV A 4 0 Vpp 0 6 V t10 6 1 05 x FS 1 05 x FS 1 05 X FS 0 8 x FS 2 1 x FS 4 T5 to 5 25 2 7 to 5 25 10 3 max max max min min to V max min to V max min 10 V max min to V max min to V max min to V max max max min min max max min min max pF typ nA nom nA nom Yo typ C typ Bit mV min mV max ppm C max ppm 1000 Hours typ LSB max max max max min max min to V max min to V max mA max mA max mA max mA max max mW max mW max UVV max AD7730 AD7730L B Version Units Conditions Comments DVpp 5 V 3 Vn 5 W HB DVpp 517 DV AV D 5V DV DVpp 5 V DVpp 317 DVpp 5 V DV 3 Y 800 Except for MCLK OUT Yun 5 V Is k 100 HA Except for MCLK OUT Vus 3 V souRcE 200 Except for MCLK OUT Vppls 5 V souRCE 100 Except for MCLK OUT Von 3V 2 5 mV Nominal with 5 V Reference REF 1N 2000 Guaranteed Monotonic FS Is the Nominal Full Scale Voltage 10 mV 20 mV 40 mV or 80 mV With AGND 0 V External MCLK Digital I Ps 0 V or DVpp All Input Ranges Except mV to 10 mV and 10 mV Input Ranges of 0 mV to 10 mV and 210 mV Only DVpp of 2 7 V to 3 3 V DVpp of 4 75 V to 5 25 V Typically 10 uA External MCLK
34. z From 49 Hz to 51 Hz From 59 Hz to 61 Hz Assuming 2 5 V or 5 V Reference with HIREF Bit Set Appropriately Gain 250 Gain 125 Gain 62 5 Gain 31 25 HIREF Bit of Mode Register HIREF Bit of Mode Register 1 NO REF Bit Active If Vprr Below This Voltage NO REF Bit Inactive If Vper Above This Voltage REV A 38 Parameter LOGIC INPUTS nput Current All Inputs Except SCLK and MCLK IN Vin Input Low Voltage Vint Input Low Voltage Ving Input High Voltage SCLK Only Schmitt Triggered Input Vr Vr Vr V Vr Vr Vr Vr MCLK IN Only Vin Input Low Voltage Vin Input Low Voltage Ving Input High Voltage Ving Input High Voltage LOGIC OUTPUTS Including MCLK OUT Vo Output Low Voltage Vor Output Low Voltage Von Output High Voltage Von Output High Voltage Floating State Leakage Current Floating State Output Capacitance TRANSDUCER BURNOUT AIN1 Current AINI Current Initial Tolerance 25 C Drift OFFSET TARE DAC Resolution LSB Size DAC Drift DAC Drift vs Time 16 Differential Linearity SYSTEM CALIBRATION Positive Full Scale Calibration Limi 2 17 Negative Full Scale Calibration Limit Offset Calibration Limit Input Span POWER REQUIREMENTS Power Supply Voltages AVpp AGND Voltage DVpp Voltage Power Supply Currents AVpp Current Normal Mode AVpp Current Normal Mode DVpp Current Normal Mode DVpp Current Normal Mode AVpp DVpp C

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