AD7829BRW-1

Overview

The AD7829BRW-1 is an 8-bit, 8-channel analog-to-digital converter with a maximum throughput of 2 MSPS. It utilizes a half-flash architecture and features a 420 ns conversion time. The device operates on a single supply voltage of either 3 V ± 10% or 5 V ± 10%. Key specifications include a Signal-to-(Noise + Distortion) Ratio of 48 dB min at 30 kHz input frequency, Integral Nonlinearity (INL) of ±0.75 LSB max, and Differential Nonlinearity (DNL) of ±0.75 LSB max. Power consumption is typically 24 mW during normal operation and drops to 0.2 μA in power-down mode. The component is housed in a 28-lead SOIC_W package.

Feature Summary

• Integrates an on-chip track-and-hold amplifier capable of handling full-scale input signals up to 10 MHz.
• Includes a built-in 2.5 V reference voltage with 2% tolerance to simplify external circuit design.
• Features automatic power-down functionality triggered by the CONVST pin state at the end of conversion.
• Provides flexible parallel interface with End of Conversion (EOC) pulse for stand-alone microprocessor operation.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Ensure compatibility with system voltage levels and logic interfaces before integration. Cross-reference the datasheet revision to confirm all electrical parameters match design requirements.

Selection Notes

Select this component when high-speed multi-channel sampling is required within a low-power constraint. The half-flash architecture offers a balance between speed and complexity. Consider the VMID pin utility for adjusting input spans if system offsets are present. Verify that the 8-bit resolution meets the application's accuracy needs.

Part Context

This part belongs to the AD7829-1 series, which includes variants with different channel counts and packages. The BRW-1 designation specifically indicates the industrial temperature range and the wide-body SOIC package. It is designed for microprocessor-compatible interfaces, distinguishing it from serial interface alternatives in the broader ADC portfolio.

Replacement Considerations

Direct substitutes may include other parts from the AD7829 family with adjusted channel counts or packaging. Verify pinout compatibility and electrical specifications such as INL/DNL and power consumption when considering cross-references from other manufacturers.