AD7829BRZ-REEL

Overview

The AD7829BRZ-REEL is an 8-bit, 8-channel analog-to-digital converter (ADC) from Analog Devices Inc., operating at a maximum throughput of 2 MSPS. It utilizes a half-flash architecture with a conversion time of 420 ns and features an on-chip track-and-hold amplifier. The device supports single-ended inputs with a flexible parallel interface and includes an internal 2.5 V reference. It operates on a wide supply range of 3 V ± 10% or 5 V ± 10%, consuming 24 mW typically in normal operation and entering automatic power-down mode post-conversion.

Feature Summary

• Integrates an 8-bit half-flash ADC core with a high-speed track-and-hold amplifier for full-scale input frequencies up to 10 MHz.
• Features an on-chip 2.5 V reference and a VMID pin that allows the user to offset and center the analog input span within the supply rails.
• Supports automatic power-down at the end of conversion via the CONVST pin logic state sampling, reducing average power consumption.
• Provides a microprocessor-compatible parallel interface with an End-of-Conversion (EOC) pulse for standalone 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 packaging type and reel specifications. Ensure compatibility with existing board layouts by checking the TSSOP-28 footprint dimensions and pinout alignment. Confirm RoHS compliance status and lead-free soldering requirements prior to procurement.

Selection Notes

Select this component when eight single-ended channels are required alongside high-speed 2 MSPS sampling. Consider the half-flash architecture for fast conversion times compared to SAR types. Evaluate the need for the internal reference versus external precision references based on system accuracy requirements and cost constraints.

Part Context

This part belongs to the AD7822/AD7825/AD7829 family of 3 V/5 V, 2 MSPS, 8-bit sampling ADCs. The AD7829 specifically provides eight analog input channels, whereas the AD7822 offers one channel and the AD7825 offers four channels. All variants share identical electrical characteristics and pinouts where applicable.

Replacement Considerations

No direct public substitute part numbers are documented in the provided source material.