AD7715ARU-3REEL

Overview

The AD7715ARU-3REEL is a single-channel, 16-bit Sigma-Delta analog-to-digital converter manufactured by Analog Devices Inc. It operates with a nominal 3 V analog supply and a 3 V to 5.25 V digital supply. The device features a differential input architecture with programmable gain settings of 1, 2, 32, and 128. It utilizes a charge-balancing conversion technique to achieve 16 bits of resolution without missing codes. The component includes an on-chip digital filter with programmable output update rates and supports serial communication via SPI, QSPI, Microwire, or DSP-compatible interfaces. It is housed in a 16-lead TSSOP package.

Feature Summary

• Integrates a programmable gain front end capable of accepting low-level signals directly from transducers.
• Features a charge-balancing ADC structure providing high accuracy with no missing codes.
• Includes an on-chip digital filter with selectable notch frequencies for noise rejection.
• Supports multiple serial interface protocols including three-wire operation.

Applications

• Smart sensor systems requiring direct signal conditioning
• Microcontroller-based data acquisition systems
• Low-frequency measurement applications

Procurement Notes

Verify the specific suffix 'ARU' corresponds to the TSSOP-16 package and the '-3' indicates the 3 V operating grade. Confirm that the 'REEL' designation matches the required tape and reel quantity for automated assembly processes. Ensure compatibility with the target system's voltage levels and clock requirements before finalizing procurement.

Selection Notes

Select this variant when a surface-mount TSSOP package is required for space-constrained designs. Choose the '-3' suffix if the system operates exclusively on a 3 V analog supply. Consider the internal programmable gain amplifier to reduce external component count. Verify that the maximum master clock frequency aligns with the desired output data rate and noise performance specifications.

Part Context

This component belongs to the AD7715 family of low-frequency, high-precision analog-to-digital converters. The family shares core architectural features such as the Sigma-Delta modulator and digital filter but differs in supply voltage ratings and physical packaging options. The ARU suffix specifically denotes the thin-shrink small outline package variant within this product line.

Replacement Considerations

Direct pin-compatible replacements include other variants within the AD7715 series, such as AD7715ARZ-3 or AD7715ARUZ-3, depending on the required package type (SOIC vs. TSSOP) and reel configuration. Cross-referencing the exact supply voltage grade and package dimensions is essential for mechanical fit.