AD7991YRJZ-0RL

Overview

The AD7991YRJZ-0RL is a 12-bit successive approximation analog-to-digital converter (ADC) featuring an I2C-compatible serial interface in an 8-lead SOT-23 package. It operates from a single 2.7 V to 5.5 V supply and includes four single-ended analog input channels or three inputs with one reference channel. The device supports standard, fast, and high-speed I2C modes with two available address versions. It features a track-and-hold amplifier handling input frequencies up to 14 MHz and a typical conversion time of 1 µs. Power consumption is minimized with a shutdown mode drawing a maximum of 1 µA.

Feature Summary

• Four single-ended analog input channels or three inputs with one external reference input.
• I2C-compatible serial interface supporting standard, fast, and high-speed communication modes.
• Automatic power-down functionality for low-power operation in idle states.
• Reference voltage derived from the power supply or an external source.

Applications

• System monitoring
• Battery-powered systems
• Data acquisition
• Medical instruments

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm pinout compatibility and I2C address configuration. Ensure the component meets RoHS compliance requirements for the target assembly process. Cross-reference the datasheet revision to validate electrical specifications before finalizing procurement orders.

Selection Notes

Select this component when a compact 12-bit ADC with an I2C interface is required. Verify that the system logic levels match the 2.7 V to 5.5 V operating range. Confirm that the four-channel multiplexer satisfies the input selection needs. Check if the automotive qualification status aligns with the application environment requirements.

Part Context

This part belongs to the AD7991/AD7995/AD7999 family of low-power SAR ADCs. The AD7991 variant specifically provides 12-bit resolution. Other family members offer different resolutions such as 10-bit or 8-bit. All variants share the same 8-lead SOT-23 package and I2C interface architecture.

Replacement Considerations

Direct substitutes within the same family include the AD7995 (10-bit) and AD7999 (8-bit). These parts maintain identical pinouts and interfaces but differ in resolution. Verify software compatibility regarding data word length when substituting these variants.