AD7829BRU-REEL7

Overview

The AD7829BRU-REEL7 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 capable of handling input frequencies up to 10 MHz. The device supports single-ended inputs with spans of 2 V (at 3 V supply) or 2.5 V (at 5 V supply), adjustable via the VMID pin. It includes an internal 2.5 V reference and operates on a flexible parallel interface with automatic power-down capabilities.

Feature Summary

• Integrates an 8-bit half-flash ADC with a high-speed track-and-hold amplifier for efficient signal acquisition.
• Features an on-chip 2.5 V reference voltage and an input offset adjust (VMID) pin for flexible input range centering.
• Supports eight single-ended analog input channels selectable via address pins without requiring write operations.
• Includes automatic power-down functionality triggered by the CONVST pin state at the end of each conversion cycle.

Applications

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

Procurement Notes

Verify the specific ordering suffix REEL7 confirms tape-and-reel packaging when sourcing components. Confirm that the BRU designation corresponds to the TSSOP-28 package variant required for your PCB layout. Ensure compatibility with the 3 V or 5 V supply rails specified in the datasheet before finalizing procurement orders.

Selection Notes

Select this component for applications requiring multiple single-ended inputs with moderate resolution and high speed. The AD7829 is suitable where microprocessor interfacing is needed due to its parallel interface. Consider the AD7822 or AD7825 if fewer channels are sufficient. Evaluate power consumption requirements as the device offers automatic power-down modes to minimize energy usage during idle periods.

Part Context

The AD7829 is part of the AD7822/AD7825/AD7829 family of high-speed sampling ADCs. This series combines speed and low power consumption using half-flash technology. The AD7829 specifically provides eight channels, distinguishing it from the single-channel AD7822 and four-channel AD7825 variants within the same functional family.

Replacement Considerations

The AD7829BRUZ-1 is listed as a parameter-equivalent alternative by distributors. Verify pinout and electrical specifications against the primary datasheet before substitution.