AD7714YRZ

Overview

The AD7714YRZ is a 24-bit sigma-delta analog-to-digital converter (ADC) from Analog Devices, housed in a 24-lead TSSOP package. It operates on single supplies of +2.7 V to +3.3 V or +4.75 V to +5.25 V and supports an industrial temperature range of -40°C to +105°C. The device features five programmable gain channels with gains ranging from 1 to 128, configurable as three fully differential or five pseudo-differential inputs. It includes a low-pass digital filter with programmable cutoff frequencies and a three-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards.

Feature Summary

• Five-channel programmable gain front end accepting direct transducer signals
• Sigma-delta conversion architecture ensuring 24-bit no missing codes performance
• On-chip digital filter with programmable notch frequencies for noise rejection
• Three-wire serial interface supporting multiple standard communication protocols

Applications

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

Procurement Notes

Verify the specific suffix 'RZ' corresponds to the 24-lead TSSOP package and RoHS compliance status before procurement. Confirm that the Y grade specifications, including the extended temperature range and Schmitt trigger inputs, align with the design requirements. Ensure the power supply voltage matches either the 3 V or 5 V operational mode defined in the datasheet.

Selection Notes

Select this component when high-resolution signal conditioning is required for low-frequency measurements. The integrated PGA reduces external component count by eliminating the need for discrete amplifiers. Consider the Y grade specifically for applications requiring operation down to 2.7 V, lower power consumption, and improved linearity compared to standard versions. Verify compatibility with the host microcontroller's serial interface timing.

Part Context

The AD7714YRZ belongs to the AD7714 family of complete analog front ends designed for low-frequency measurement applications. This series integrates a charge balancing ADC, programmable gain amplifier, and digital filter into a single CMOS device. The Y grade variant offers enhanced performance characteristics, including a wider operating temperature range and reduced power dissipation, making it suitable for demanding industrial environments.

Replacement Considerations

Direct replacements within the same package and pinout include other AD7714 variants such as the AD7714YRUZ. Cross-family upgrades may involve the AD7124 series for higher speed or additional channels, though pinouts and register maps will differ significantly.