AD7718BRU-REEL

Overview

The AD7718BRU-REEL is a complete analog front-end for low frequency measurement applications, featuring a 24-bit Sigma-Delta ADC. It supports 4/5 fully-differential or 8/10 pseudo-differential input channels with a programmable gain amplifier ranging from 1 to 128. The device operates on a single 3 V or 5 V supply, consuming 1.28 mA typically at 3 V. It utilizes a 32 kHz crystal and internal PLL, offering software-programmable output data rates up to 1.365 kS/s. Factory calibration ensures high accuracy without field adjustments.

Feature Summary

• Factory-calibrated architecture eliminates the need for external field calibration procedures.
• Integrated programmable gain amplifier allows direct connection of low-level transducer signals.
• Sigma-Delta conversion technique provides high resolution with no missing codes performance.
• Simultaneous 50 Hz and 60 Hz line frequency rejection capabilities are built-in.

Applications

• Industrial Process Control
• Pressure Transducers
• Portable Instrumentation
• Smart Transmitters

Procurement Notes

Verify component authenticity through official Analog Devices channels or authorized distributors. Confirm package type matches TSSOP-28 specifications. Check RoHS compliance status as required by local regulations. Ensure storage conditions adhere to moisture sensitivity levels to prevent damage prior to soldering.

Selection Notes

Select this model when 24-bit resolution is required for precision measurements. Choose over the AD7708 if higher bit depth is necessary for the same pinout. Consider the BRU suffix for surface mount TSSOP packaging requirements. Verify power supply constraints align with the specified 3 V or 5 V operation ranges.

Part Context

This component belongs to the AD7708/AD7718 family of low voltage, low power ADCs. It shares pin compatibility with the 16-bit AD7708, allowing for design upgrades without hardware modifications. The series is designed for multiplexed data acquisition systems requiring high channel counts and precise signal conditioning.

Replacement Considerations

The AD7718BRUZ-REEL serves as a direct replacement, differing only in package style (SOIC vs TSSOP). Ensure mechanical footprint clearance matches the selected package variant before substitution.