AD7811YRU

Overview

The AD7811YRU is a 10-bit successive approximation analog-to-digital converter (ADC) housed in a 16-lead Thin Shrink Small Outline Package (TSSOP). It features four single-ended analog inputs configurable as three pseudo-differential channels or two independent pseudo-differential pairs. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and includes an onboard 2.5 V reference with ±2.5% accuracy. It supports a maximum sampling rate of 350 kSPS with a conversion time of 2.3 µs. The serial interface is compatible with DSPs and microcontrollers, allowing for hardware or software control of conversions and power-down modes.

Feature Summary

• Configurable input architecture supporting single-ended and pseudo-differential channel arrangements via control register settings.
• Integrated track-and-hold amplifier and onboard 2.5 V reference circuitry to minimize external component requirements.
• DSP-compatible serial interface enabling shared bus operation through a dedicated package address pin.

Applications

• Battery-powered instrumentation systems requiring low power consumption.
• Industrial process control loops utilizing multiple sensor inputs.
• Data acquisition modules interfacing with microcontrollers or digital signal processors.

Procurement Notes

Verify the specific ordering suffix RU confirms the 16-lead TSSOP package configuration. Ensure the Y version designation matches the required linearity error specifications of ±1 LSB. Confirm that the automotive qualification status aligns with the target application environment requirements before finalizing procurement.

Selection Notes

Select this component when a 10-bit resolution with four input channels is sufficient for the application. Consider the AD7812 if eight channels are required instead of four. Evaluate the power consumption at the desired throughput rate, as automatic power-down modes significantly reduce current draw during idle periods between conversions.

Part Context

The AD7811YRU belongs to the AD7811/AD7812 family of high-speed, low-power sampling ADCs manufactured by Analog Devices. This series is designed for applications demanding moderate resolution with flexible input configurations. The YRU variant specifically denotes the plastic TSSOP package option within the broader product lineup.

Replacement Considerations

The AD7811YR serves as a direct package alternative using the SOIC format. For applications requiring additional channels, the AD7812YRU provides an eight-channel equivalent in the same TSSOP footprint. Verify pin compatibility and control register mapping when substituting these devices.