ADS1242IPWT-1

Overview

The ADS1242IPWT is a 24-bit, low-noise analog-to-digital converter (ADC) from Texas Instruments, housed in a 16-pin TSSOP package. It features a sigma-delta architecture with an integrated programmable gain amplifier (PGA) offering gains from 1 to 128. The device supports up to four differential or eight single-ended input channels via a multiplexer. Key electrical parameters include a supply voltage range of 2.7V to 5.25V, power consumption as low as 600µW, and a maximum sampling rate of 15 S/s. It provides simultaneous 50Hz and 60Hz rejection and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated Programmable Gain Amplifier (PGA) with selectable gains from 1 to 128 for signal conditioning.
• Dual-purpose pins allowing configurable analog inputs or general-purpose digital I/O.
• Built-in burnout current sources for detecting open or shorted sensor conditions.
• On-chip calibration capabilities including self-calibration and system calibration functions.

Applications

• Industrial process control systems
• Liquid and gas chromatography equipment
• Smart transmitters
• Portable instrumentation devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and tape-and-reel specifications. Confirm that the component meets all required environmental standards and RoHS compliance before integration into production designs.

Selection Notes

Select this component when high-resolution measurement is required with minimal external signal conditioning. Ensure the application benefits from the integrated PGA and digital filter features. Verify that the SPI interface compatibility matches the host controller requirements.

Part Context

This part belongs to the ADS124x family of precision delta-sigma ADCs. It shares architectural similarities with the ADS1243 but differs in pin count and channel configuration. The IPWT suffix indicates a surface-mount TSSOP-16 package suitable for automated assembly processes.

Replacement Considerations

The ADS1242IPWR is a direct pin-compatible alternative with identical electrical characteristics, differing only in the reel packaging format. Other members of the ADS124x series may require schematic modifications due to varying pin counts or channel configurations.