AD7825BRZ-REEL

Overview

The AD7825BRZ-REEL is a high-speed, 4-channel, 8-bit analog-to-digital converter (ADC) from Analog Devices. It features a half-flash architecture with a maximum throughput of 2 MSPS and a conversion time of 420 ns. The device operates on a single supply voltage ranging from 3 V ± 10% to 5 V ± 10%. Key specifications include a signal-to-noise ratio of 48 dB minimum, integral nonlinearity of ±0.75 LSB, and differential nonlinearity of ±0.75 LSB. It integrates an on-chip 2.5 V reference and a track-and-hold amplifier capable of handling input frequencies up to 10 MHz.

Feature Summary

• Integrates a 420 ns half-flash ADC core with an on-chip track-and-hold amplifier for high-frequency signal acquisition.
• Features flexible parallel interface logic with end-of-conversion pulse support for standalone microprocessor operation.
• Includes an automatic power-down mechanism triggered at the end of conversion to minimize energy consumption.
• Provides analog input span adjustment via the VMID pin to accommodate various system offset requirements.

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel configuration. Ensure compatibility with required operating temperature ranges and supply voltage specifications before integration into final designs.

Selection Notes

Select this component for applications requiring multi-channel sampling at speeds up to 2 MSPS. Consider the half-flash architecture for fast conversion times and evaluate the integrated reference and track-and-hold capabilities to simplify external circuit design.

Part Context

This part belongs to the AD7822/AD7825/AD7829 family of 3 V/5 V, 2 MSPS, 8-Bit Sampling ADCs. The AD7825 variant specifically provides four single-ended analog input channels, distinguishing it from the single-channel AD7822 and the eight-channel AD7829 within the same series.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.