AD7714ARZ-3

Overview

The AD7714ARZ-3 is a complete analog front end for low-frequency measurement applications, featuring a charge balancing ADC with 24-bit no missing codes performance. It operates from a single +3 V supply and includes a five-channel programmable gain front end with gains ranging from 1 to 128. The device accepts low-level signals directly from transducers and outputs serial digital words via a three-wire interface compatible with SPI, QSPI, MICROWIRE, and DSP systems. It incorporates an on-chip digital filter with programmable cutoffs and supports self-calibration, system calibration, and background calibration modes.

Feature Summary

• Integrates a five-channel programmable gain front end that can be configured as three fully differential or five pseudo-differential inputs.
• Features a proprietary sigma-delta conversion technique with an on-chip digital filter allowing adjustment of filter cutoff and settling time.
• Provides comprehensive calibration options including self-calibration, system calibration, and background calibration accessible through internal registers.
• Supports a three-wire serial interface for software-configurable gain settings, signal polarity selection, and channel switching.

Applications

• Portable industrial instruments
• Portable weigh scales
• Loop-powered systems
• Pressure transducers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure the selected variant matches the required power supply voltage and operating conditions for the target application environment.

Selection Notes

Select this component when designing systems requiring high-resolution signal conditioning for low-frequency measurements. Consider the available gain settings and input configurations to match the sensor output characteristics. Verify compatibility with the host microcontroller's serial interface protocols before integration.

Part Context

This part belongs to the AD7714 family of signal conditioning ADCs designed for precision measurement applications. The series offers various grades and packages to accommodate different environmental and form factor requirements while maintaining consistent core performance specifications.

Replacement Considerations

Consult the manufacturer's ordering guide for alternative models within the AD7714 family that offer different package styles or extended temperature ranges. Verify pinout and electrical specifications before substituting any other components in existing designs.