AD7811YRZ

Overview

The AD7811YRZ is a 10-bit, 4-channel successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and supports a maximum sampling rate of 350 kSPS with a conversion time of 2.3 µs. The device features an onboard 2.5 V reference with ±2.5% accuracy and a serial interface compatible with DSPs and microcontrollers. It is housed in a 16-lead SOIC package and supports input configurations as four single-ended or three pseudo-differential channels.

Feature Summary

• Integrated track-and-hold amplifier and onboard 2.5 V reference circuitry
• Configurable input channels supporting single-ended and pseudo-differential modes
• DSP-compatible serial interface with hardware and software control options
• Automatic power-down modes for reduced energy consumption at lower throughput rates

Applications

• Battery-powered instrumentation systems requiring low power consumption
• Industrial process control data acquisition networks
• Automotive sensor signal conditioning interfaces
• Portable medical monitoring devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging and tape-and-reel specifications. Confirm that the component meets RoHS compliance requirements for your target market. Cross-reference the pinout configuration with the official datasheet to prevent installation errors during PCB assembly.

Selection Notes

Select this component when a multi-channel ADC with integrated reference and low power consumption is required. Ensure the system supply voltage falls within the 2.7 V to 5.5 V range. Verify that the serial interface timing parameters align with the host microcontroller or DSP capabilities. Consider the thermal impedance if operating near the upper temperature limits.

Part Context

The AD7811YRZ belongs to the AD7811/AD7812 family of high-speed, low-power sampling ADCs. While the AD7811 provides four channels, the AD7812 variant offers eight channels. Both share identical architecture, performance characteristics, and interface protocols, differing primarily in channel count and package lead configuration.

Replacement Considerations

Direct substitutes include other parts within the AD7811/AD7812 family such as the AD7811YN or AD7811YRU, depending on the required package type. Verify pin compatibility and electrical specifications before replacing.