ICL7107CDL

ADCs/DACs - Special Purpose Overview

The ICL7107CDL is a high-performance, low-power 3½-digit analog-to-digital converter (ADC) manufactured by Harris Corporation. It features a dual-slope integration architecture with an internal clock and reference voltage source. The device includes seven-segment decoders and display drivers designed to directly interface with instrument-size light-emitting diode (LED) displays. Key electrical characteristics include a typical input bias current of 1pA, auto-zero capability below 10µV, and zero drift under 1µV/°C. It operates on ±5V power supplies with typical power dissipation below 10mW.

ADCs/DACs - Special Purpose Feature Summary

• Direct LED Display Drive: Integrated seven-segment decoders and drivers eliminate the need for external microcontrollers or active components.
• High Accuracy: Features true differential inputs, guaranteed zero reading at 0V input, and rollover error less than one count.
• Low Noise and Drift: Achieves less than 15µV peak-to-peak noise and zero drift below 1µV/°C.
• Integrated Resources: Contains an on-chip clock oscillator and a stable 2.8V reference voltage source.

ADCs/DACs - Special Purpose Applications

• Digital panel meters for voltage measurement
• Bridge transducer interfaces such as load cells and strain gauges
• Precision DC voltmeters
• Signal processing systems requiring direct numeric output

ADCs/DACs - Special Purpose Procurement Notes

Verify the manufacturer designation, as Intersil acquired Harris Semiconductor's mixed-signal assets. Confirm the CDL suffix indicates a ceramic DIP package suitable for industrial environments. Ensure compliance with RoHS requirements if lead-free composition is mandatory for the specific procurement batch.

ADCs/DACs - Special Purpose Selection Notes

Select the ICL7107CDL when direct LED driving is required without digital logic overhead. Compare against the ICL7106 if LCD interfacing is needed instead. Verify that the application supports dual ±5V power supplies. Consider the 40-pin DIP package constraints for PCB layout and thermal management in enclosed instruments.

ADCs/DACs - Special Purpose Part Context

The ICL7107 is part of the Intersil/Renesas ICL71xx family of 3½-digit ADCs. The ICL7107 variant specifically targets LED displays, whereas the ICL7106 targets LCDs. The CDL suffix typically denotes a ceramic dual-in-line package, offering higher reliability compared to plastic variants for harsh environments.

ADCs/DACs - Special Purpose Replacement Considerations

The ICL7106 serves as a functional alternative for LCD-based designs. The ICL7117 offers higher resolution but requires different interfacing. Verify pin compatibility and supply voltage requirements before substituting with generic CMOS ADCs.