ADS1120IRVAT

Analog To Digital Converters (ADC) Overview

The ADS1120IRVAT is a low-power, low-noise 16-bit analog-to-digital converter (ADC) manufactured by Texas Instruments. It utilizes a sigma-delta architecture and features an integrated multiplexer, programmable gain amplifier (PGA), and temperature sensor. The device supports up to four differential or single-ended inputs and communicates via an SPI interface. It operates on analog and digital supply voltages ranging from 2.3 V to 5.5 V. Key electrical specifications include a maximum sampling rate of 2 kSPS, integral nonlinearity (INL) of 0.002% FSR, and power consumption of 1.4 mW. It is housed in a 16-VQFN package with dimensions of 3.5x3.5 mm and functions within a temperature range of -40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrated signal conditioning chain including a multiplexer, programmable gain amplifier, and delta-sigma ADC for direct sensor interfacing.
• Built-in excitation current sources (iDACs) and internal oscillator support bridge sensors and reduce external component count.
• High-precision performance with 16-bit resolution and inherent 50/60 Hz rejection capabilities for noise-sensitive applications.

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring precise temperature measurement using RTDs or thermocouples.
• Building automation devices utilizing pressure transducers and strain gauge sensors.
• Portable instrumentation where low power consumption and high accuracy are critical design constraints.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'VAT' against the manufacturer's latest datasheet to confirm packaging type and reel quantity specifications. Ensure compatibility with the target PCB footprint for the 16-VQFN package. Cross-reference the operating temperature grade to match system environmental requirements. Confirm that the SPI interface timing aligns with the host microcontroller capabilities.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-channel, high-resolution conversion is required with minimal external circuitry. The integrated PGA eliminates the need for discrete amplifiers, while the built-in iDACs simplify bridge sensor biasing. Consider the 2 kSPS data rate limit for dynamic signal applications. Evaluate the 16-VQFN thermal pad requirements for adequate heat dissipation in enclosed enclosures.

Analog To Digital Converters (ADC) Part Context

The ADS1120 belongs to Texas Instruments' family of precision, low-power delta-sigma ADCs designed for connected sensor applications. It serves as a specialized solution for bridging analog sensors to digital systems without complex front-end conditioning. The IRVAT variant specifically denotes the industrial temperature grade and tape-and-reel packaging format suitable for automated surface-mount assembly processes.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the official TI selection guide for pin-compatible or functionally equivalent alternatives within the ADS11xx series.