AD7827BRZ-REEL7

Overview

The AD7827BRZ-REEL7 is a single-channel, 8-bit analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 3 V or 5 V supply and achieves a maximum throughput of 1 MSPS with a conversion time of 420 ns. The device integrates an on-chip track-and-hold amplifier and a 2.5 V reference with 2% tolerance. It features a serial interface compatible with DSPs and microcontrollers. The input voltage range is 0 V to 2.5 V at 5 V supply or 0 V to 2 V at 3 V supply. The component is housed in an 8-lead SOIC package.

Feature Summary

• Integrates a half-flash ADC architecture with an on-chip track-and-hold amplifier for precise signal acquisition.
• Features automatic power-down functionality controlled by the CONVST pin state to optimize energy consumption.
• Includes a built-in 2.5 V voltage reference with specified tolerance, eliminating the need for external reference components.
• Provides a three-wire serial interface optimized for direct connection to popular digital signal processors.

Applications

• High-speed data acquisition systems requiring single-ended input processing
• Direct interfacing with TMS320C5x and ADSP-21xx digital signal processors
• Battery-powered instrumentation utilizing low-power automatic power-down modes

Procurement Notes

Verify that the ordering suffix REEL7 corresponds to tape-and-reel packaging as indicated by distributor listings. Confirm the B version designation matches the required linearity error specifications of ±0.5 LSB. Ensure the procurement source provides valid RoHS compliance documentation for the specific manufacturing batch.

Selection Notes

Select this component when a single-ended 8-bit resolution is sufficient for the application. Consider the 420 ns conversion time and 1 MSPS throughput against system timing requirements. Evaluate the fixed 2.5 V internal reference against applications requiring higher precision or different voltage ranges where an external reference would be necessary.

Part Context

The AD7827 series represents a high-speed, low-power solution for 8-bit sampling applications. The BRZ suffix indicates the industrial temperature grade (-40°C to +105°C) and lead-free compliant SOIC-8 package. This model belongs to the broader family of Analog Devices serial interface ADCs designed for embedded control environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing board layouts if considering alternative manufacturers, specifically regarding pin definitions and serial protocol timing.