AD7991YRJZ-1RL

Overview

The AD7991YRJZ-1RL is a 12-bit successive approximation analog-to-digital converter featuring an I2C-compatible serial interface in an 8-lead SOT-23 package. It integrates four single-ended analog input channels and supports standard, fast, and high-speed I2C modes. The device operates from a single 2.7 V to 5.5 V supply with a typical conversion time of 1 µs. Key electrical parameters include a signal-to-noise ratio of 71 dB, integral nonlinearity of ±1 LSB, and differential nonlinearity of ±0.9 LSB. It functions within a temperature range of −40°C to +125°C.

Feature Summary

• Four single-ended analog input channels or three inputs with one reference input channel
• I2C-compatible serial interface supporting standard, fast, and high-speed modes
• Automatic shutdown mode for low power consumption
• Reference derived from the power supply or external reference

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 that the selected variant matches the required automotive qualification status if applicable. Cross-reference the datasheet revision to validate performance specifications under intended operating conditions.

Selection Notes

Select this component when a compact 12-bit ADC with an I2C interface is required for multi-channel applications. Consider the available I2C addresses to ensure bus compatibility with other devices. Evaluate the power supply voltage range and thermal requirements to ensure operation within the specified industrial temperature limits.

Part Context

The AD7991 belongs to a family of low-power, successive approximation ADCs that includes the AD7995 (10-bit) and AD7999 (8-bit). These devices share similar packaging and interface characteristics but differ in resolution and specific performance metrics. The Y version denotes an extended industrial temperature range suitable for demanding environments.

Replacement Considerations

The AD7995 and AD7999 are functionally related parts within the same series but offer different resolutions. Verify that the bit depth and I2C addressing requirements align with the system design before substituting.