ICL7109EQH+TD

Analog To Digital Converters (ADC) Overview

The ICL7109EQH+TD is a monolithic 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated. It utilizes a dual-slope integration architecture to provide high-precision conversion with a sampling rate of 30 samples per second. The device features differential inputs and parallel data interfaces, designed for direct connection to microprocessor buses via 3-state binary outputs. It operates on ±5V power supplies and supports an industrial temperature range of -40°C to +85°C. Packaged in a 44-LQFP format, it integrates over-range detection and polarity indication for robust system monitoring.

Analog To Digital Converters (ADC) Feature Summary

• Microprocessor-compatible interface with 3-state binary outputs
• Dual-slope integration architecture for high noise rejection
• Direct UART handshake mode support for serial transmission
• Integrated polarity and over-range status indicators

Analog To Digital Converters (ADC) Applications

• Remote data logging systems requiring serial communication
• Industrial panel meters and digital displays
• Precision measurement instruments interfacing with microcontrollers
• High-resolution sensor signal conditioning

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix EQH+TD against official manufacturer documentation to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the 44-LQFP configuration. Cross-reference RoHS compliance status with current regulatory requirements before finalizing procurement orders.

Analog To Digital Converters (ADC) Selection Notes

Select this component when 12-bit resolution and microprocessor compatibility are required. Consider the dual-slope topology for applications demanding high noise immunity in low-frequency measurements. Verify that the ±5V supply voltage aligns with the target system's power distribution network and that the LQFP package fits the mechanical constraints.

Analog To Digital Converters (ADC) Part Context

The ICL7109 belongs to the Maxim Integrated ICL71xx series of integrating ADCs, widely used in precision instrumentation. This family is known for replacing older discrete solutions with single-chip microprocessor-compatible converters. The ICL7109 specifically targets applications needing direct digital output without external logic, simplifying system design compared to earlier generation ADCs.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitutes include the ICL7109CPL+ and ICL7109IPL+. Verify pinout and electrical specifications match before substitution. Other compatible parts may exist within the broader ICL71xx family; consult official cross-reference guides for validated alternatives.