Overview
Features and Benefits
- Improved 2nd Source (See our “Maxim Advantage™” Page 3)
- ±20,000 Count Resolution
- Guaranteed ±1 Count accuracy
- Over-range, under-range signals for auto-range capability
- Easy interface to UARTs and µPs
- TTL compatible, Multiplexed BCD outputs
- True differential input. Zero reading guaranteed for 0 volt Input
- True polarity at zero for precise null detection
- Monolithic CMOS Design
Product Details
The Maxim ICL7135 is a high precision monolithic 41/2 digit A/D converter. Dual slope conversion reliability is combined with ±1 in 20,000 count accuracy and a 2.0000V full scale capability. It features high impedance differential inputs, nearly ideal differential linearity, true ratiometric operation, auto zero and auto-polarity. The multiplexed BCD outputs and digit drivers provide easy interface to external display drivers like the Maxim ICM7211A. The only other external components needed to make precision DVM/DPMs are a reference and a clock. For more complex systems the BCD outputs are enhanced by Active-Low STROBE, OVERRANGE, UNDERRANGE, RUN/Active-Low HOLD and BUSY lines providing easy interface to microprocessors and UARTs. This interfacing capability makes the ICL7135 an ideal device for use in microprocessor based data acquisition and control systems.
The ICL7135 has auto-zero accuracy better than 10µV, zero drift of 0.5µV/°C, input bias current of 10pA max. and rollover error of less than 1 count.
Applications
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Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| ICL7135CAI+ | Material Declaration | Reliability Data | 28-SSOP-5.3_MM | |
| ICL7135CAI+C10176 | Material Declaration | Reliability Data | 28-SSOP-5.3_MM | |
| ICL7135CAI+T | Material Declaration | Reliability Data | 28-SSOP-5.3_MM | |
| ICL7135CMH+D | Material Declaration | Reliability Data | Metric Quad Flatpack | |
| ICL7135CPI+ | Material Declaration | Reliability Data | 28-PDIP-600_MIL | |
| ICL7135CPI+2 | Material Declaration | Reliability Data | 28-PDIP-600_MIL | |
| ICL7135CQI+ | Material Declaration | Reliability Data | Plastic Leaded Chip Carrier | |
| ICL7135CQI+T | Material Declaration | Reliability Data | Plastic Leaded Chip Carrier | |
| Wafer Fabrication Data |
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