ADS1225IRGVT

Overview

The ADS1225IRGVT is a low-power, 24-bit analog-to-digital converter (ADC) from Texas Instruments, utilizing sigma-delta architecture. It features a single differential input channel and supports I2C and SPI digital interfaces. The device operates on analog and digital supply voltages ranging from 2.7 V to 5.5 V. Key performance metrics include a maximum sampling rate of 100 S/s, a power consumption of 1.6 mW, and a differential nonlinearity (DNL) of +/- 1 LSB. It integrates an internal oscillator and temperature sensor, housed in a 16-pin VQFN package with an operating temperature range of -40°C to +105°C.

Feature Summary

• Integrates a built-in oscillator and temperature sensor for system monitoring without external components.
• Supports flexible digital communication via standard I2C and SPI interface protocols.
• Delivers high-resolution data conversion using sigma-delta modulation with a single differential input.

Applications

• Battery-powered portable instrumentation requiring low current draw.
• Industrial process control systems utilizing RTD or thermocouple sensors.
• Weigh scales and force measurement platforms.

Procurement Notes

Verify the specific suffix 'VT' indicates tape-and-reel packaging when ordering. Confirm that the required operating voltage aligns with the 2.7 V to 5.5 V specification. Ensure the design accommodates the 16-VQFN footprint and thermal requirements for the industrial temperature range. Cross-reference the datasheet for any recent product change notices affecting pinout or electrical characteristics.

Selection Notes

Select this component when a balance of high resolution and ultra-low power consumption is critical. The integrated oscillator reduces bill-of-materials complexity compared to devices requiring external clocks. Consider the 100 S/s speed limit for applications not requiring high-speed acquisition. Verify compatibility with the host microcontroller's I2C or SPI logic levels within the specified supply voltage range.

Part Context

This part belongs to the ADS122x family of precision ADCs designed for cost-sensitive, battery-operated applications. It shares architectural similarities with the ADS1226 but differs in channel count and specific feature sets. The IRGVT designation specifies the industrial temperature grade and reel packaging format, distinguishing it from tube-packaged variants like the IRGV.

Replacement Considerations

ADS1226IRGVT: Offers two differential inputs instead of one, maintaining similar power and resolution specs.

FAQ

Does the ADS1225IRGVT require an external reference voltage?

Yes, the device requires an external reference voltage; it does not contain an internal reference generator.

What is the maximum sampling rate of the ADS1225IRGVT?

The maximum sampling rate is 100 samples per second (SPS).

Can the ADS1225IRGVT interface directly with 3.3V and 5V logic systems?

Yes, the digital interface operates within the same voltage range as the digital supply, which spans from 2.7 V to 5.5 V.