ICL7126C/D

ADCs/DACs - Special Purpose Overview

The ICL7126C/D is a high-performance, low-power 3½-digit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. / Maxim Integrated. It integrates seven-segment decoders, display drivers, an internal reference, and clock circuitry on a single CMOS IC. Designed for direct liquid crystal display (LCD) interface, it eliminates the need for external display driver components. The device operates with a supply current of 100µA, making it suitable for 9V battery-powered applications. Key electrical specifications include a maximum power dissipation of 1W, a supply voltage range of 9V, and an operating temperature range from 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• Direct LCD drive capability without external components
• Low power dissipation guaranteed less than 1mW
• Internal clock and voltage reference included
• Auto-zero accuracy with zero drift less than 1µV/°C

ADCs/DACs - Special Purpose Applications

• Digital panel meters
• Battery-powered measurement systems
• Bridge-type transducer interfaces such as load cells and strain gauges

ADCs/DACs - Special Purpose Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and package type (PDIP-40) against specific design requirements. Check for obsolete status or lifecycle changes that may affect long-term availability. Ensure proper handling for static-sensitive devices during installation.

ADCs/DACs - Special Purpose Selection Notes

Select this component when designing low-cost, high-accuracy panel meters requiring minimal external passive components. It serves as a plug-in replacement for the ICL7106 in existing designs, requiring only passive component adjustments. Consider its 3½-digit resolution and differential input capabilities for precision measurements where noise rejection is critical.

ADCs/DACs - Special Purpose Part Context

The ICL7126 is part of the ICL71xx series of 3½-digit ADCs. It represents the low-power variant of the ICL7106, offering similar functionality with reduced power consumption. Originally introduced by Intersil, the product line was later acquired by Maxim Integrated and subsequently became part of Analog Devices Inc. following their merger.

ADCs/DACs - Special Purpose Replacement Considerations

The ICL7126 can function as a direct pin-compatible replacement for the ICL7106 in many applications, provided that the surrounding passive components are adjusted to accommodate the lower power characteristics. Designers should verify compatibility with existing PCB layouts and ensure that the reduced supply current meets system power budget constraints.