AD7812YR

Overview

The AD7812YR is a high-speed, low-power 10-bit analog-to-digital converter featuring eight single-ended input channels. It operates from a single 2.7 V to 5.5 V supply and includes an onboard track-and-hold amplifier and a 2.5 V reference circuit. The device supports a throughput rate of 350 kSPS with a conversion time of 2.3 µs. It utilizes a DSP- and microcontroller-compatible serial interface for data transfer. The Y version guarantees ±1 LSB linearity error and is available in a 20-lead Small Outline IC (SOIC) package.

Feature Summary

• Eight configurable input channels supporting single-ended or pseudo-differential modes via control register settings
• Integrated 2.5 V reference circuitry with option for external reference selection
• Hardware and software control capabilities for conversion start and automatic power-down modes
• Package address pin enabling multiple devices to share the same serial bus

Applications

• Industrial process control systems requiring multi-channel data acquisition
• Battery-powered instrumentation utilizing low power consumption features
• Automotive applications qualified for automotive standards
• Data acquisition modules interfacing with digital signal processors

Procurement Notes

Verify the specific ordering suffix against official Analog Devices documentation to confirm package type and linearity specifications. Ensure compatibility with system voltage requirements within the 2.7 V to 5.5 V range. Confirm that the serial interface timing meets the host controller's setup and hold time constraints before finalizing procurement decisions.

Selection Notes

Select the AD7812YR when eight input channels are required alongside 10-bit resolution and high sampling speeds. Consider this component for designs needing integrated reference and track-and-hold functionality to reduce external component count. Evaluate the SOIC package dimensions against PCB layout constraints and verify thermal performance under maximum operating conditions.

Part Context

The AD7812YR belongs to the AD7811/AD7812 family of successive approximation register ADCs. This series provides high-speed sampling capabilities with low power consumption. The AD7812 variant specifically offers eight channels compared to the four channels found in the AD7811 model. Both models share similar architectural features and interface protocols.

Replacement Considerations

The AD7811 serves as a functional alternative if fewer input channels are sufficient. Verify pinout compatibility and serial interface timing parameters when substituting components. Ensure that the replacement part meets the same linearity and power supply requirements.