ICL7126CPL

ADCs/DACs - Special Purpose Overview

The ICL7126CPL+ is a low-power, 3 1/2-digit CMOS analog-to-digital converter (ADC) manufactured by Analog Devices / Maxim Integrated. It integrates a high-impedance differential input, precision null detectors, and an internal reference with low temperature drift. The device operates on a single 9V supply with typical power dissipation of 500µW. It features a parallel interface for direct connection to LCD displays. Packaged in a 40-pin PDIP, it supports through-hole mounting and functions within a commercial temperature range of 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• 3 1/2 Digit Resolution: Provides 2000 counts for precise measurement applications.
• Low Power Consumption: Operates on a single 9V battery with typical power dissipation of 500µW.
• Internal Reference: Includes a low-drift internal voltage reference, reducing external component count.
• Parallel Interface: Directly drives LCD segments via a parallel output interface.

ADCs/DACs - Special Purpose Applications

• Battery-powered digital multimeters
• Precision weighing scales
• Industrial process control instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the manufacturer designation as Analog Devices Inc. or Maxim Integrated, reflecting the corporate acquisition history. Confirm the package type is PDIP-40 and the operating temperature range is 0°C to +70°C. Check RoHS compliance status directly from the datasheet, as indicated in supplier listings. Ensure the part number suffix '+' denotes lead-free composition if required by specific assembly standards.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a self-contained 3 1/2-digit ADC with minimal external circuitry is required. It is suitable for designs constrained by power budgets due to its low quiescent current. Compare against the TC7126 series for pin-compatible alternatives from other manufacturers. Verify that the parallel LCD driving capability meets the display segment requirements without additional buffering.

ADCs/DACs - Special Purpose Part Context

The ICL7126 is part of the widely adopted ICL71xx family of dual-slope integrating ADCs. This series established a standard for low-cost, high-resolution conversion in portable instruments. The CPL suffix specifically identifies the plastic DIP package variant. As a legacy component, it remains relevant for maintenance of existing designs rather than new high-speed data acquisition systems.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers include TC7126CPL from Microchip Technology and ICL7106 variants for lower resolution needs. Cross-reference electrical parameters such as input leakage current and reference drift before substitution.