AD7731BNZ

The AD7731BNZ from Analog Devices is a high-performance 24-bit Sigma-Delta Analog-to-Digital Converter (ADC) suitable for demanding process control applications. Its proprietary programmable gain front end allows direct acceptance of a wide range of input signal levels, including low-level signals from transducers.

The device integrates a sigma-delta modulator and a low-pass programmable digital filter, enabling adjustments to filter cutoff, output rate, and settling time. It offers buffered differential inputs and operates from a single +5V supply. The AD7731BNZ supports various unipolar and bipolar input ranges and achieves 16 bits of peak-to-peak resolution at an 800 Hz output rate. It can switch between channels with a 1 ms settling time.

Designed for ease of integration, the AD7731BNZ features a serial interface compatible with microcontrollers and digital signal processors. It includes self-calibration and system calibration options, with low offset and gain drift specifications. The ADC is available in a 24-lead PDIP package and is designed for through-hole mounting.

Key features include a 24-bit resolution, programmable gain, and programmable output rates up to 6.4 kHz. Its architecture is ideal for applications requiring high accuracy and noise immunity, such as PLCs and industrial instrumentation.