AD7714ARZ-5

Overview

The AD7714ARZ-5 is a 24-bit, low-noise analog-to-digital converter (ADC) from Analog Devices. It features a five-channel programmable gain front end with gains ranging from 1 to 128. The device operates on a single +5 V supply and utilizes a sigma-delta conversion technique. It supports differential or pseudo-differential input configurations and includes an internal reference. Key specifications include 0.0015% integral nonlinearity, a three-wire serial interface compatible with SPI, and power dissipation of 5 mW typical at +5 V operation.

Feature Summary

• Integrates a charge balancing ADC with a proprietary programmable gain front end for direct transducer interfacing.
• Features a digital filter with programmable cutoff frequencies to adjust settling time and reject specific noise frequencies.
• Includes on-chip calibration registers allowing users to read and write calibration coefficients for self-calibration and system calibration.
• Provides a flexible three-wire serial interface that reduces interconnect lines and optocoupler requirements in isolated systems.

Applications

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

Procurement Notes

Verify the package type matches the required PCB footprint, as the AD7714 series is available in multiple packages including SOIC-24 and DIP-24. Confirm the suffix indicates the correct voltage grade (+5 V operation). Check RoHS compliance status and ensure the component meets the required temperature range specifications for the intended application environment.

Selection Notes

Select this model when a 24-bit resolution and high accuracy are required for low-frequency measurements. The +5 V supply requirement distinguishes it from the -3 variant. Consider the five-channel capability if multiple sensor inputs need conditioning. Ensure the system clock frequency aligns with the desired data rate and filter notch settings for optimal noise performance.

Part Context

The AD7714 belongs to a family of signal conditioning ADCs designed for precision measurement applications. It combines analog signal conditioning with high-resolution conversion in a single CMOS IC. The ARZ-5 designation specifically denotes the commercial temperature range (-40°C to +85°C), +5 V analog supply, and SOIC-24 package with lead-free finish.

Replacement Considerations

The AD7714YRZ is a pin-compatible alternative offering extended temperature range (-40°C to +105°C) and lower power consumption. Verify if the wider operating temperature or reduced current draw justifies the substitution. Other variants like AD7714ANZ-5 offer different packaging options but maintain similar electrical characteristics.