AD7822BRU-REEL

Overview

The AD7822BRU-REEL is an 8-bit, single-channel analog-to-digital converter (ADC) from Analog Devices. It features a maximum throughput of 2 MSPS and utilizes a half-flash architecture with a conversion time of 420 ns. The device includes an on-chip 2.5 V reference and a track-and-hold amplifier. It operates from a single supply voltage of either 3 V ± 10% or 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. Power consumption is typically 24 mW during normal operation.

Feature Summary

• High-speed parallel interface compatible with microprocessors and DSPs
• On-chip track-and-hold amplifier supporting full power bandwidth up to 10 MHz
• Automatic power-down mode at the end of conversion for low power efficiency
• VMID pin allows adjustment of the analog input span offset

Applications

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

Procurement Notes

Verify the specific package type and reel quantity when ordering. Confirm that the BRU suffix corresponds to the TSSOP package variant required for your PCB layout. Ensure compatibility with the intended operating temperature range of -40°C to +85°C. Check for any RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component for applications requiring high-speed sampling with moderate resolution. Consider the AD7825 or AD7829 if multiple input channels are needed instead of a single channel. Evaluate the power consumption requirements against the automatic power-down feature. Ensure the system can accommodate the parallel interface logic levels and timing constraints specified in the datasheet.

Part Context

The AD7822 is part of a family of high-speed, 8-bit ADCs that also includes the AD7825 (4-channel) and AD7829 (8-channel). These devices share similar architectural features, such as the half-flash conversion technique and on-chip reference. The AD7822 specifically targets single-channel applications within this series, offering a compact solution for data acquisition tasks.

Replacement Considerations

Direct replacements within the same family include the AD7825 and AD7829, though these offer additional channels. Verify pinout compatibility and software/hardware interface adjustments if substituting with multi-channel variants. Other 8-bit, 2 MSPS ADCs may require significant circuit redesign due to differences in interface protocols and pin configurations.