ADS1112IDGST

Analog To Digital Converters (ADC) Overview

The ADS1112IDGST is a precision, continuous self-calibrating analog-to-digital converter (ADC) manufactured by Texas Instruments. It features a delta-sigma architecture with 16-bit resolution and supports two differential or three single-ended input channels. The device integrates a 2.048V reference voltage, enabling an input range of ±2.048V. It operates on a single supply voltage ranging from 2.7V to 5.5V for both analog and digital domains. The ADS1112IDGST communicates via an I2C-compatible serial interface and includes programmable gain amplifiers (PGA) with gains up to 8x. Conversion rates are selectable at 15, 30, 60, or 240 samples per second (SPS). It is housed in a compact 10-VSSOP package and functions within a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a high-precision 16-bit delta-sigma ADC with onboard self-calibration capabilities to maintain accuracy without external components.
• Features a flexible input multiplexer supporting either two fully differential inputs or three single-ended inputs for versatile signal acquisition.
• Includes an internal 2.048V reference voltage source and a programmable gain amplifier (PGA) to optimize signal measurement for small input ranges.
• Utilizes an I2C-compatible serial interface with configurable address pins, allowing multiple devices to share the same bus lines.

Analog To Digital Converters (ADC) Applications

• Portable battery-powered instruments requiring low power consumption and high resolution.
• Industrial process control systems utilizing smart transmitters and sensor interfaces.
• Medical equipment and handheld diagnostic devices where space constraints and precision are critical.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'GST' corresponds to the tape-and-reel or cut-tape packaging variant intended for surface-mount assembly. Confirm that the operating environment remains within the specified industrial temperature range of -40°C to +85°C. Ensure the I2C bus voltage levels are compatible with the device's 2.7V to 5.5V supply range. Check for RoHS3 compliance status if required by regional regulations. Validate that the selected sample rate meets the bandwidth requirements of the application signals.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS1112IDGST when a balance between moderate speed (up to 240 SPS) and high resolution (16-bit) is required. Choose this component over higher-speed ADCs if power efficiency and minimal board space are priorities. Consider the integrated PGA and reference if external precision components would otherwise increase system cost and complexity. Ensure the application does not require more than three input channels, as other models in the family may offer additional mux configurations.

Analog To Digital Converters (ADC) Part Context

The ADS1112 belongs to the ADS111x family of 16-bit analog-to-digital converters from Texas Instruments. This series is designed for applications demanding high accuracy in a small form factor. While the ADS1112 offers two differential or three single-ended channels, other variants like the ADS1115 provide four differential channels, and the ADS1113 offers a single channel with a built-in oscillator. The IDGSR suffix typically denotes reel packaging, whereas GST indicates cut-tape or Digi-Reel options.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS1112IDGST is parameter-equivalent to the ADS1112IDGSR, differing primarily in packaging format rather than electrical function. Verify pinout compatibility if substituting with third-party alternatives such as the MS1112, ensuring that register maps and timing characteristics align with the design requirements.