AD7829BRWZ-1

Overview

The AD7829BRWZ-1 is an 8-bit, 8-channel analog-to-digital converter with a maximum throughput of 2 MSPS and a conversion time of 420 ns. It operates from a single 3 V or 5 V supply and includes an on-chip 2.5 V reference. The device features a track-and-hold amplifier with a full power bandwidth supporting input frequencies up to 10 MHz. DC accuracy specifications include a maximum integral nonlinearity of ±0.75 LSB and a differential nonlinearity of ±0.75 LSB. Dynamic performance at 2 MHz sampling yields a signal-to-noise plus distortion ratio of 48 dB minimum.

Feature Summary

• Integrated 8-channel multiplexer with automatic channel selection via address inputs without requiring write commands.
• On-chip 2.5 V voltage reference with low temperature coefficient for stable operation.
• Flexible parallel interface with end-of-conversion pulse enabling stand-alone microprocessor interfacing.
• Automatic power-down mode triggered by logic state sampling at the end of conversion cycles.

Applications

• Data acquisition systems
• DSP front ends
• Disk drives
• Mobile communication systems subsampling applications

Procurement Notes

Verify the specific suffix 'B' indicates the industrial temperature range version (-40°C to +85°C) and 'RWZ' denotes the 28-lead SOIC_W package. Confirm that the datasheet revision matches the required specification baseline. Ensure ordering documentation explicitly lists the part number as AD7829BRWZ-1 to distinguish it from other variants in the family.

Selection Notes

Select this component when an 8-bit resolution with 2 MSPS throughput is required for multi-channel signals. The internal reference simplifies design by eliminating external reference components. Consider the VMID pin functionality if input signal offset adjustment or bipolar signal accommodation is necessary within the system architecture.

Part Context

This part belongs to the AD7829 series of high-speed, 8-channel ADCs. The AD7829-1 variant specifically integrates an on-chip 2.5 V reference, distinguishing it from versions requiring external references. It utilizes a half-flash architecture combining coarse and fine conversion stages to achieve 8-bit accuracy.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing board layouts and software drivers before considering alternative devices from other manufacturers.