ICL7129ACPL-2

ADCs/DACs - Special Purpose Overview

The ICL7129ACPL-2 is a low-noise, single-chip analog-to-digital converter (ADC) with an integrated multiplexed LCD driver. It provides 4 1/2-digit resolution and utilizes continuous integration technology to achieve high accuracy without external auto-zero capacitors. The device operates on a single power supply ranging from 6V to 14V and features a differential input with low bias current. It includes built-in logic for range switching, overrange/underrange detection, and battery monitoring, designed for direct connection to liquid crystal displays in precision measurement applications.

ADCs/DACs - Special Purpose Feature Summary

• 4 1/2-digit resolution with ±19,999 counts
• Integrated multiplexed LCD driver for direct display interface
• Continuous integration technique eliminates external auto-zero components
• Low input bias current of 10pA maximum

ADCs/DACs - Special Purpose Applications

• Precision digital panel meters
• Digital voltmeters (DVM)
• Industrial process control instrumentation
• Battery-powered measurement devices

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix '-2' against official Analog Devices documentation to confirm if it denotes a specific tape-and-reel packaging variant or a distinct qualification grade, as standard listings often reference the 'CPL+' designation. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary by region.

ADCs/DACs - Special Purpose Selection Notes

Select this component when designing systems requiring high-resolution DC voltage measurements with minimal external circuitry. Ensure the application supports the required 6V to 14V single-supply operation. Verify that the target display matches the internal driver's segment and digit capabilities for a direct interface solution.

ADCs/DACs - Special Purpose Part Context

This part belongs to the ICL7129 family of integrating ADCs, which succeeded earlier dual-slope converters by removing the need for external auto-zero capacitors. The series is widely recognized for its use in high-accuracy panel meters and laboratory instruments where stability and low noise are critical performance factors.

ADCs/DACs - Special Purpose Replacement Considerations

The TC7129CPL from Microchip Technology is documented as a similar replacement option. Verify pin compatibility and electrical parameter alignment before substitution.