ADS1211PG4

Overview

The ADS1211PG4 is a 24-bit analog-to-digital converter (ADC) manufactured by Texas Instruments. It utilizes sigma-delta architecture and features four differential input channels with an integrated multiplexer and programmable gain amplifier (PGA). The device supports SPI, I2C, and 3-wire digital interfaces. It operates on a single 5V supply, with both analog and digital power rails ranging from 4.75 V to 5.25 V. The ADC achieves a maximum sampling rate of 16 kS/s and includes an internal reference. It 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 4-channel multiplexer and programmable gain amplifier for flexible signal conditioning.
• Supports multiple digital communication protocols including SPI, I2C, and 3-wire serial interfaces for versatile system integration.
• Includes an internal voltage reference and low-pass filter to simplify external component requirements and reduce board space.

Applications

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

Procurement Notes

Verify the specific suffix 'PG4' against the manufacturer's current datasheet to confirm pinout compatibility and RoHS status. Ensure the ordering information matches the exact package type and temperature grade required for the target application environment before finalizing procurement.

Selection Notes

Select this component when a 24-bit resolution and 16 kS/s throughput are required for multi-channel differential inputs. Consider the integrated PGA and internal reference if minimizing external passive components is a priority. Verify that the operating voltage range aligns with the system's 5V supply constraints.

Part Context

The ADS1211PG4 belongs to the ADS121x family of precision analog-to-digital converters. This series is designed for applications demanding high accuracy and low noise. The 'G4' suffix typically indicates lead-free and RoHS-compliant manufacturing, distinguishing it from older non-compliant variants while maintaining identical electrical specifications.

Replacement Considerations

Direct replacements include the ADS1211U and ADS1211IP. Verify package compatibility, as the PG4 variant uses a 24-SOIC footprint. Check for any updates in the datasheet regarding interface timing or power consumption differences between revisions.