ADS1212PG4

Overview

The ADS1212PG4 is a 22-bit analog-to-digital converter manufactured by Texas Instruments, housed in a 20-pin PDIP package. It utilizes a sigma-delta architecture to achieve high resolution with a maximum data rate of 66.7 samples per second. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and features an internal low-drift reference. Key electrical specifications include a differential nonlinearity of ±1 LSB and an integral nonlinearity of ±3 LSB. It supports both unipolar and bipolar input ranges and includes a programmable gain amplifier.

Feature Summary

• Integrates a precision internal reference voltage source to minimize external component requirements.
• Features a programmable gain amplifier for flexible signal conditioning across various input scales.
• Supports multiple digital interface protocols including SPI and I2C-compatible modes for system integration.

Applications

• Industrial process control systems requiring high-resolution sensor interfacing
• Weigh scale and load cell measurement applications
• Medical instrumentation such as ECG and physiological monitoring devices

Procurement Notes

Verify the specific package variant when ordering, as the PG4 suffix denotes a plastic DIP package. Confirm RoHS compliance status through the manufacturer's current documentation, as lead-free designations may vary by production batch. Ensure that the supplier provides valid traceability documents for quality assurance purposes in regulated industries.

Selection Notes

Select this component when application requirements demand high resolution over high speed. The 22-bit resolution makes it suitable for low-frequency measurements where noise immunity is critical. Compare against the ADS1211 or ADS1219 if different channel counts or higher sampling rates are required for the specific design constraints.

Part Context

This part belongs to the ADS121x family of precision ADCs from Texas Instruments. These devices are designed for applications needing high accuracy and low power consumption. The ADS1212 specifically offers a balance of resolution and simplicity, serving as a direct replacement for older Burr-Brown designs in legacy equipment upgrades.

Replacement Considerations

The ADS1212P is the non-RoHS equivalent predecessor. For pin-compatible alternatives with similar performance, consider the ADS1211 for single-channel needs or the ADS1219 for multi-channel configurations. Verify interface compatibility when substituting with other sigma-delta ADCs from different manufacturers.