ICL7136CQH+TD

ADCs/DACs - Special Purpose Overview

The ICL7136CQH+TD is a low-power, 3½-digit analog-to-digital converter (ADC) with direct LCD drivers. It integrates a high-impedance differential input amplifier, a precision reference oscillator, and an LCD segment driver. The device operates on a single supply voltage, typically 9V, and consumes minimal current. It features a dual-slope integration architecture for high noise rejection. The component is housed in a 44-pin PLCC package and is designed for battery-powered instrumentation applications requiring direct display interfacing without external multiplexing.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 3½-digit ADC with direct LCD segment and common electrode drivers
• Low power consumption suitable for battery-operated instruments
• High input impedance differential amplifier with built-in reference oscillator
• Dual-slope integration providing excellent noise rejection at 50/60 Hz

ADCs/DACs - Special Purpose Applications

• Battery-powered digital multimeters
• Portable industrial process control displays
• Precision weighing scales
• Temperature monitoring systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the manufacturer designation, as Analog Devices Inc. acquired Maxim Integrated. Confirm the specific suffix '+TD' indicates tape and reel packaging and RoHS compliance against the original Maxim specification. Ensure the 44-PLCC package dimensions match the target PCB footprint. Check for obsolescence status or lifecycle notices from the current manufacturer.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a complete ADC solution with integrated display driving is required to minimize external components. Compare with the ICL7137 series if LED display output is needed instead of LCD. Verify that the single-supply voltage range meets the system's power constraints. Ensure the operating temperature range covers the intended environmental conditions.

ADCs/DACs - Special Purpose Part Context

The ICL7136 is part of the classic Intersil/Maxim ICL71xx family of dual-slope ADCs. It serves as a direct replacement for older CMOS versions like the ICM7136. The 'C' grade denotes commercial temperature range operation. The '+TD' suffix specifies the lead-free, tape-and-reel packaging variant distributed by Analog Devices following the acquisition of Maxim Integrated.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.