ADS1220IPW

Overview

The ADS1220IPW is a low-power, low-noise 24-bit analog-to-digital converter (ADC) from Texas Instruments. It utilizes a delta-sigma architecture and features four differential or single-ended input channels with an integrated multiplexer and programmable gain amplifier (PGA). The device supports SPI digital interfaces and operates on supply voltages ranging from 2.3 V to 5.5 V for both analog and digital domains. It offers a maximum sampling rate of 2 kS/s and includes built-in excitation current sources (iDACs), an internal oscillator, and a temperature sensor. The component is housed in a 16-pin TSSOP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated signal conditioning chain featuring a multiplexer, programmable gain amplifier, and delta-sigma ADC core for high-resolution data acquisition.
• Built-in excitation current sources (iDACs) designed to drive external sensors such as RTDs without requiring additional external circuitry.
• Supports 50 Hz and 60 Hz line frequency rejection through configurable digital filters to minimize power line interference.

Applications

• Battery-powered thermometers utilizing PT100 RTD sensors
• IO-Link sensor transmitters
• Load cell bridge measurements

Procurement Notes

Verify the specific suffix against official datasheets to confirm packaging type, as IPW denotes tube packaging while IPWR indicates tape and reel. Confirm RoHS compliance status and moisture sensitivity level requirements prior to assembly. Ensure the ordering part number matches the exact pinout and functional specifications required for the target design.

Selection Notes

Select this component when high resolution and low noise are critical for small signal sensing applications. Consider the ADS1220IPW over higher-speed variants if power consumption must be minimized at lower sampling rates. Verify that the available input channels and PGA settings align with the sensor interface requirements before finalizing the bill of materials.

Part Context

This device belongs to the ADS1220 family of precision data converters. It shares architectural similarities with other members like the ADS1222 but differs in channel count and pin configuration. The IPW suffix specifically identifies the surface-mount TSSOP-16 package variant distributed in tubes, distinguishing it from the reel-packaged IPWR version.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Designers should consult the manufacturer's selection guide for compatible alternatives within the same product family or similar performance classes.