AD7714ANZ-5

Overview

The AD7714ANZ-5 is a complete analog front end for low-frequency measurement applications, featuring a 24-bit sigma-delta ADC with no missing codes. It operates on a single +5 V supply and includes a five-channel programmable gain front end with gains from 1 to 128. The device accepts differential or pseudo-differential inputs directly from transducers. It utilizes a three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards. Integral nonlinearity is specified at -0.0015% of FSR. Power consumption is typically 3.5 mW in normal mode and 20 µA in standby.

Feature Summary

• Integrates a charge balancing ADC with a proprietary programmable gain front end based on an analog modulator.
• Features a configurable digital filter with programmable cutoff frequencies and notch settings for noise rejection.
• Supports self-calibration, system calibration, and background calibration modes to eliminate offset and gain errors.
• Includes Schmitt triggers on SCLK and DIN inputs for improved noise immunity in noisy environments.

Applications

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

Procurement Notes

Verify the specific suffix 'ANZ' against the manufacturer's current ordering guide to confirm package type (PDIP-24) and compliance status. Ensure the '-5' designation matches the required +5 V analog supply voltage range. Cross-reference the revision level with the latest datasheet to confirm pinout and electrical specifications remain unchanged.

Selection Notes

Select this component when a high-resolution, low-power signal conditioning solution is required for multi-channel sensor interfaces. The integrated PGA reduces external component count by accepting signals directly from strain gauges. Verify that the system clock frequency falls within the 400 kHz to 2.5 MHz range to ensure specified performance levels are met.

Part Context

This part belongs to the AD7714 family of signal conditioning ADCs. The 'AN' suffix indicates a plastic dual-in-line package (PDIP), while the '-5' specifies operation with a +5 V analog supply. The 'Z' suffix denotes lead-free construction. This model is distinct from the AD7714Y grade, which offers extended temperature ranges and lower power consumption.

Replacement Considerations

The AD7714AR-5 serves as a surface-mount alternative using the SOIC package. For extended temperature and lower power requirements, the AD7714YN series is available. Verify pin compatibility and software register configurations before substituting any variant within the AD7714 family.