ICL7104-14CPL

Analog To Digital Converters (ADC) Overview

The ICL7104-14CPL is a 3 1/2 digit analog-to-digital converter and LED display driver manufactured by Harris Corporation. It integrates a dual-slope integrating ADC, a decoder, multiplexer, and common driver for seven-segment displays. The device operates on a single 5V supply with a maximum power dissipation of 1.33 W. Key electrical parameters include a typical accuracy of ±1 count and a conversion rate of approximately 3 conversions per second. It features an internal clock oscillator and requires minimal external components, making it suitable for direct interface with LED indicators in measurement systems.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 3 1/2 digit A/D converter with built-in decoder and display drivers
• Operates from a single +5V power supply with low current consumption (max 1.8 mA)
• Includes internal clock oscillator and high-impedance FET input amplifier
• Provides automatic polarity indication and overrange display capabilities

Analog To Digital Converters (ADC) Applications

• Digital panel meters for voltage and current measurement
• Temperature monitoring systems using thermocouple or RTD inputs
• Weight indicator interfaces for load cell applications
• General-purpose data acquisition front-ends

Analog To Digital Converters (ADC) Procurement Notes

Verify the manufacturer origin as Harris Corporation, noting that Maxim Integrated and Analog Devices have since acquired related product lines. Confirm the specific suffix '-14' denotes speed grade or temperature range variations if documented in official datasheets. Ensure the PDIP-40 package matches the required footprint. Check RoHS compliance status against current regulatory requirements for legacy components.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a complete 3 1/2 digit solution with integrated display driving is required without external logic. Compare against ICL7106 or ICL7107 variants if LCD output or different pin configurations are needed. Verify that the input impedance and reference voltage stability meet the precision requirements of the target application. Ensure the operating temperature range aligns with the environmental conditions of the deployment site.

Analog To Digital Converters (ADC) Part Context

The ICL7104 belongs to the widely adopted ICL710x family of monolithic 3 1/2 digit A/D converters. Originally developed by Intersil and later Harris Corporation, these devices established a standard for low-cost digital metering. The ICL7104 specifically targets LED display applications, distinguishing itself from LCD-oriented counterparts like the ICL7106 through its output driver architecture and segment current capabilities.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements include the ICL7107CPL+ from Analog Devices/Maxim Integrated. Other equivalents may include the TLC271 series or generic CMOS ADCs if custom circuitry is acceptable. Verify functional compatibility regarding reference voltage requirements and display drive currents before substitution.