AD7829BRZ

Overview

The AD7829BRZ 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 an on-chip track-and-hold amplifier. The device operates from a single 3 V ± 10% or 5 V ± 10% supply. Key electrical parameters include a conversion time of 420 ns, an input voltage span of 2.5 V at 5 V operation, and a signal-to-noise ratio of 48 dB minimum. Power consumption is 36 mW maximum in normal operation.

Feature Summary

• Integrates an on-chip 2.5 V reference and track-and-hold amplifier for simplified system design.
• Features flexible parallel interface with end-of-conversion pulse for standalone microprocessor operation.
• Includes VMID pin to adjust analog input offset and center the input span within the supply range.

Applications

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

Procurement Notes

Verify the specific package variant against the datasheet outline dimensions. Confirm that the ordering suffix matches the required temperature grade and packaging format. Ensure compatibility with the target microprocessor logic levels before finalizing procurement.

Selection Notes

Select this component when eight single-ended channels are required at high sampling rates. Consider the half-flash architecture for speed versus power trade-offs. Verify that the 8-bit resolution meets the application's accuracy requirements compared to higher-resolution SAR alternatives.

Part Context

This part belongs to the AD7822/AD7825/AD7829 family of high-speed sampling ADCs. While sharing the same core conversion engine and interface, the AD7829 specifically provides eight analog input channels, distinguishing it from the single-channel AD7822 and four-channel AD7825 variants.

Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include the AD7829BRUZ-1. Verify pinout and electrical specifications against the primary datasheet before substitution.