7820 MAXWELL | Alldatasheet
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09.09.03 Rev 3
TABLE 1. PIN DESCRIPTION 1V IN Analog Input Range: VREF(-) to VREF(+). /RDY WRITE control input/READY status output. READ Input. RD must be low to access data from the part. plete INT returns high on rising the edge of RD or CS.
10 GND Ground
or WR to be recognized by the converter.
18 OFL
which can be used to cascade 2 or more devices to increase resolution. TABLE 2. 7820 ABSOLUTE MAXIMUM RATINGS1
- CAUTION: ESD (electrostatic discharge) sensitive device. The digital control inputs are diode protected; how-
tion socket before devices are inserted. TABLE 3. 7820 DC ELECTRICAL CHARACTERISTICS TABLE 2. 7820 ABSOLUTE MAXIMUM RATINGS1
- Total unadjusted error includes offset, full scale and linearity error.
TABLE 3. 7820 DC ELECTRICAL CHARACTERISTICS
TABLE 4. 7820 AC ELECTRICAL CHARACTERISTICS1
- Sample tested at 25°C to ensure compliance. Only on process design change.
FIGURE 1. LOAD CIRCUITS FOR DATA ACCESS TIME TEST FIGURE 2. LOAD CIRCUITS FOR DATA HOLD TIME RESET
FIGURE 3. LOAD CIRCUIT FOR ACCESS TIME FIGURE 4. LOAD CIRCUIT FOR OUTPUT FLOAT DELAY
FIGURE 5. ACCURACY VS. TWR FIGURE 6. ACCURACY VS. TRD
FIGURE 7. ACCURACY VS. TSP FIGURE 8. ACCURACY VS. TREF [VREF = VREF(+) - VREF(-)]
FIGURE 9. SIGNAL-NOISE RATIO VS. INPUT FREQUENCY FIGURE 10. TINTL INTERNAL TIME DELAY VS. TEMPERATURE
FIGURE 11. OUTPUT CURRENT VS. TEMPERATURE FIGURE 12. OPERATING SEQUENCE (WR-RD MODE)
FIGURE 13. RD MODE FIGURE 14. WR-RD MODE (TRD>TINTL)
FIGURE 15. WR-RD MODE (TRD<TINTL) FIGURE 16. WR-RD MODE STAND-ALONE OPERATION (CS=RD=0)
FIGURE 17. POWER SUPPLY AS REFERENCE FIGURE 18. INPUT NOT REFERENCED TO GND
FIGURE 19. EQUIVALENT INPUT CIRCUIT FIGURE 20. RC NETWORK MODEL
16All data sheets are subject to change without notice ©2003 Maxwell Technologies All rights reserved. Microprocessor-compatible 8-Bit ADC 7820 Note: All dimensions in inches
20 PIN RAD-PAK® DUAL IN LINE PACKAGE
A -- 0.202 0.230 b 0.014 0.018 0.026 b2 0.045 0.050 0.065 c 0.008 0.010 0.018 D -- 1.000 1.060 E 0.220 0.295 0.310 eA 0.300 BSC eA/2 0.150 BSC e 0.100 BSC L 0.135 0.145 0.155 Q 0.015 0.045 0.070 S1 0.005 0.025 -- S2 0.005 -- -- N2 0
17All data sheets are subject to change without notice ©2003 Maxwell Technologies All rights reserved. Microprocessor-compatible 8-Bit ADC 7820 Important Notice: These data sheets are created using the chip manufacturer’s published specifications. Maxwell Technologies verifies functionality by testing key parameters either by 100% testing, sample testing or characterization. The specifications presented within these data sheets represent the latest and most accurate information available to date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no responsibility for the use of this information. Maxwell Technologies’ products are not authorized for use as critical components in life support devices or systems without express written approval from Maxwell Technologies. Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Tech- nologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts.
18All data sheets are subject to change without notice ©2003 Maxwell Technologies All rights reserved. Microprocessor-compatible 8-Bit ADC 7820 Feature Option Details7820 RP D X Screening Flow Package Radiation Feature Base Product Nomenclature Monolithic S = Maxwell Class S B = Maxwell Class B I = Industrial (testing @ -55°C, +25°C, +125°C) E = Engineering (testing @ +25°C) D = Dual In-line Package (DIP) RP = R AD-PAK® package Microprocessor-Compatible 8-Bit ADC