AD7739BRU

Overview

The AD7739BRU is an 8-channel, high-throughput, 24-bit Sigma-Delta analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates with a single 5 V analog supply and supports digital supplies of either 3 V or 5 V. The device features configurable inputs for eight single-ended or four fully differential channels, offering input ranges of ±625 mV, ±1.25 V, and ±2.5 V. It achieves up to 15 kHz data throughput and includes on-chip per-channel system calibration. The component utilizes a 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards, housed in a 24-lead TSSOP package.

Feature Summary

• Configurable analog front end supporting eight single-ended or four fully differential input channels with selectable unipolar and bipolar voltage ranges.
• Integrated on-chip per-channel system calibration capabilities to minimize offset and gain errors without external components.
• High-speed channel switching optimized for multiplexing applications, achieving true 16-bit peak-to-peak resolution at 4 kHz.
• Versatile digital interface with Schmitt-triggered logic inputs, compatible with standard serial protocols including SPI and Microwire.

Applications

• Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCSs)
• High-resolution multiplexing applications requiring fast channel switching
• Industrial process control systems
• Precision industrial instrumentation

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm pinout compatibility and packaging type. Ensure that the required analog and digital supply voltages align with the specified operational ranges before integration into the design.

Selection Notes

Select this component when high channel count and rapid switching speeds are required alongside 24-bit resolution. Consider the AD7738 if higher speed is needed but leakage current tolerance is acceptable, or the AD7734/AD7732 for fewer channels with different input configurations.

Part Context

The AD7739 belongs to the AD773x family of high-precision Sigma-Delta ADCs from Analog Devices. It shares architectural similarities with the AD7738, AD7734, and AD7732, differing primarily in channel count, input configuration options, and maximum throughput specifications within the same product line.

Replacement Considerations

The AD7738 is a similar part within the family but offers higher speed at the cost of increased analog input leakage current. The AD7734 provides four single-ended channels with extended input range capabilities, while the AD7732 offers two fully differential channels.