AD7825BRUZ-REEL7

Overview

The AD7825BRUZ-REEL7 is a high-speed, 4-channel, 8-bit analog-to-digital converter (ADC) from Analog Devices. It features a maximum throughput of 2 MSPS and utilizes a half-flash architecture with an on-chip track-and-hold amplifier. The device operates on a single supply voltage ranging from 3 V ± 10% to 5 V ± 10%. Key electrical parameters include a signal-to-noise ratio of 48 dB minimum, integral nonlinearity of ±0.75 LSB, and differential nonlinearity of ±0.75 LSB. Power consumption is typically 24 mW during normal operation and drops to 5 μA in power-down mode. The component is housed in a TSSOP-24 package.

Feature Summary

• Integrates a 420 ns conversion time and a track-and-hold amplifier capable of handling input frequencies up to 10 MHz for subsampling applications.
• Includes an on-chip 2.5 V reference and allows input span adjustment via the VMID pin to center the analog input range within the supply rails.
• Features a flexible parallel interface with an end-of-conversion pulse that enables standalone operation or microprocessor interfacing.
• Supports automatic power-down at the end of conversion based on the CONVST pin state, optimizing power efficiency.

Applications

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

Procurement Notes

Verify the specific ordering suffix REEL7 corresponds to the reel packaging configuration required for your assembly line. Confirm the B version grade meets the industrial temperature range specifications of -40°C to +85°C. Ensure compatibility with the TSSOP-24 footprint and check for any RoHS compliance documentation updates from the manufacturer prior to final procurement.

Selection Notes

Select this component when four single-ended channels are required at 8-bit resolution and 2 MSPS speed. Consider the half-flash architecture for its balance of speed and power consumption. Evaluate the need for the internal 2.5 V reference versus an external precision reference if tighter accuracy is required. Verify that the parallel interface timing constraints align with the target microprocessor or DSP system.

Part Context

This part belongs to the AD7822/AD7825/AD7829 family of sampling ADCs. The AD7825 specifically provides four channels, distinguishing it from the single-channel AD7822 and the eight-channel AD7829. All variants share the same core half-flash architecture, 2 MSPS throughput, and power management features, differing primarily in channel count and package pinout.

Replacement Considerations

Direct replacements within the same family include the AD7822 for single-channel applications and the AD7829 for eight-channel requirements. Cross-family replacements require careful evaluation of interface compatibility, resolution, and sampling rate differences.