AD7812YRUZ

Overview

The AD7812YRUZ is a high-speed, low-power 10-bit analog-to-digital converter (ADC) featuring eight single-ended input channels. It operates from a single 2.7 V to 5.5 V supply and delivers a throughput of 350 kSPS with a conversion time of 2.3 µs. The device integrates an onboard track-and-hold amplifier and a 2.5 V reference circuit. It utilizes a DSP-compatible serial interface for data transfer and includes a package address pin to facilitate bus sharing in multipackage applications. The component is qualified for automotive applications and housed in a 20-lead TSSOP package.

Feature Summary

• Eight-channel sampling capability with configurable single-ended or pseudo-differential input modes via control registers.
• Integrated 2.5 V reference circuitry that powers down when an external reference is utilized.
• Hardware and software control options for conversion start and automatic power-down modes to optimize energy consumption.
• Package address pin allows two devices to share the same serial bus in multipackage systems.

Applications

• Automotive sensor signal acquisition
• Industrial process control data logging
• Portable instrumentation with battery constraints

Procurement Notes

Verify the specific suffix 'UZ' against the manufacturer's current ordering guide to confirm RoHS compliance and lead-free status. Confirm the package type matches the required 20-lead Thin Shrink Small Outline Package (TSSOP). Ensure the operating voltage range aligns with the system's 2.7 V to 5.5 V supply requirements before finalizing procurement.

Selection Notes

Select this component when eight input channels are required within a single IC footprint. It is suitable for designs needing a balance between speed and power efficiency. Consider the AD7811 if only four channels are sufficient, as it shares the same core architecture but offers fewer inputs. Verify serial interface compatibility with the host microcontroller or DSP.

Part Context

The AD7812 belongs to the AD7811/AD7812 family of 10-bit successive approximation register ADCs. These devices are designed for applications requiring moderate resolution and high sampling rates. The family distinguishes itself by integrating both the track-and-hold and reference on-chip, reducing external component count compared to discrete solutions.

Replacement Considerations

The AD7811 serves as a lower-channel alternative within the same family. Direct pin-for-pin replacements are not available due to the distinct channel counts and pin configurations between the 16-lead AD7811 and the 20-lead AD7812. System redesign may be necessary for substitution.