ADS1211E/1KG4

Overview

The ADS1211E/1KG4 is a 24-bit analog-to-digital converter (ADC) from Texas Instruments, utilizing sigma-delta architecture. It features four differential input channels and integrates a programmable gain amplifier (PGA) with gains up to 128. The device supports data rates of up to 16 kSPS and operates on a single 5V supply. Key electrical parameters include a maximum differential nonlinearity (DNL) of +/- 1 LSB and integral nonlinearity (INL) of +/- 0.0015% FSR. It communicates via SPI and includes an internal reference. The component is housed in a 24-pin SOIC package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a 24-bit sigma-delta ADC with a multiplexer and programmable gain amplifier for high-precision signal conditioning.
• Supports flexible digital interfaces including SPI, I2C, and 3-wire modes for system integration.
• Includes an internal voltage reference and low-noise analog front-end to minimize external component count.

Applications

• Industrial process control systems requiring high-resolution sensor interfacing.
• Weigh scales and load cell measurement applications.
• Medical instrumentation such as ECG and blood pressure monitors.

Procurement Notes

Verify the specific suffix 'E/1KG4' against the manufacturer's current datasheet to confirm pinout and electrical specifications match the design requirements. Ensure the ordering information aligns with the latest revision notes, as packaging or minor parameter updates may occur without functional changes. Cross-reference the part number with authorized distributors to confirm availability and authenticity.

Selection Notes

Select this component when a 24-bit resolution and multiple differential inputs are required in a compact surface-mount package. Consider the integrated PGA if signal amplification is needed before digitization. Verify that the SPI interface compatibility matches the host microcontroller. Evaluate the power consumption against system constraints, noting the 5V supply requirement.

Part Context

The ADS1211 belongs to the ADS121x family of precision ADCs from Texas Instruments. This series is designed for applications demanding high accuracy and low noise. The ADS1211 specifically offers four channels, distinguishing it from single-channel variants like the ADS1210. It shares architectural similarities with other devices in the family but provides enhanced channel count for multi-sensor systems.

Replacement Considerations

Direct replacements within the same package and functionality include the ADS1211U and ADS1211UG4. Check datasheets for any differences in operating temperature ranges or electrical characteristics. Ensure that alternative parts maintain compatibility with the existing SPI interface and voltage levels.