AD7825BRZ-REEL7

Overview

The AD7825BRZ-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 an 8-bit half-flash architecture with a conversion time of 420 ns. The device includes an on-chip track-and-hold amplifier and a 2.5 V reference. It operates from a single supply voltage ranging from 3 V ± 10% to 5 V ± 10%. The ADC provides flexible parallel interfacing with address decoding for channel selection and supports automatic power-down at the end of conversion.

Feature Summary

• Integrates a 420 ns half-flash ADC core with an on-chip track-and-hold amplifier for high-frequency signal acquisition.
• Features a dedicated VMID pin that allows users to offset and center the analog input span within the supply range.
• Combines convert start and power-down functions into a single CONVST pin to enable automatic low-power states.
• Supports standalone operation through an End-of-Conversion (EOC) pulse output.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and reel specifications. Ensure compatibility with system voltage requirements before integration. Confirm RoHS compliance status via official datasheets. Validate pinout configurations against the target PCB layout design.

Selection Notes

Select this component for applications requiring multi-channel sampling at speeds up to 2 MSPS. Consider the 8-bit resolution and half-flash topology for cost-effective high-speed performance. Evaluate the need for external versus internal references based on system noise requirements. Check if the 4-channel configuration meets the input count needs compared to the 1-channel or 8-channel variants in the series.

Part Context

This part belongs to the AD7822/AD7825/AD7829 family of microprocessor-compatible sampling ADCs. While the AD7822 offers one channel and the AD7829 offers eight, the AD7825 specifically provides four channels. All variants share identical core specifications regarding speed, resolution, and power management features.

Replacement Considerations

Direct functional substitutes within the same family include the AD7822 for single-channel applications and the AD7829 for eight-channel requirements. Verify pinout compatibility when substituting between these models as channel counts differ.