AD7811YRZ-REEL

Overview

The AD7811YRZ-REEL is a 10-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features four single-ended input channels that can be configured as three pseudo-differential inputs or two independent pseudo-differential channels. The device operates from a single 2.7 V to 5.5 V supply, consuming typically 10 mW of power. It includes an onboard track and hold amplifier and a 2.5 V reference circuit with ±2.5% accuracy. The sampling rate reaches 350 kSPS with a conversion time of 2.3 µs. It utilizes a DSP-compatible serial interface and is housed in a 16-lead SOIC package.

Feature Summary

• Configurable input channels supporting single-ended and pseudo-differential modes via control registers
• Integrated onboard track and hold amplifier for signal acquisition
• On-chip 2.5 V reference circuitry with external reference option
• Hardware and software control for conversion start and power-down modes

Applications

• Multipackage applications requiring shared serial bus communication
• DSP and microcontroller compatible data acquisition systems
• Automotive qualified electronic circuits

Procurement Notes

Verify the specific ordering suffix REEL indicates reel packaging when sourcing this component. Confirm the Y version designation aligns with the required linearity specifications. Ensure the SOIC-16 package footprint matches the target PCB design. Check for automotive qualification requirements if deploying in vehicle electronics. Validate supply voltage ranges against system power rails.

Selection Notes

Select this model for applications requiring four-channel 10-bit resolution at high speeds. Consider the AD7812 if eight channels are necessary instead of four. Evaluate the internal reference accuracy against external precision requirements. Assess power consumption needs, particularly regarding automatic power-down modes at lower throughput rates. Verify serial interface compatibility with the host processor.

Part Context

This component belongs to the AD7811/AD7812 series of high-speed, low-power sampling ADCs. The AD7811 variant specifically provides four input channels, whereas the AD7812 offers eight. Both share identical core architecture, including the SAR converter, onboard reference, and serial interface capabilities. They are designed for single-supply operation and feature package address pins for bus sharing.

Replacement Considerations

The AD7811YR serves as a direct non-reel alternative within the same package type. The AD7811YN is available in a 16-lead plastic DIP package. For higher channel counts, the AD7812 series provides eight channels with similar performance characteristics.