ADS1242IPWT

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 four differential or two single-ended input channels with an integrated programmable gain amplifier (PGA). The device utilizes a sigma-delta architecture and supports SPI communication. It operates on a single supply voltage ranging from 2.7 V to 5.25 V. Key electrical parameters include a maximum sampling rate of 15 SPS, a power consumption of 600 µW at 5 V, and a reference voltage range of 100 mV to 5 V. The component functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated programmable gain amplifier supporting gains from 1 to 128 for flexible signal conditioning.
• Built-in digital filter providing selectable output data rates with inherent 50 Hz and 60 Hz rejection capabilities.
• Supports both differential and single-ended input configurations via multiplexed channel inputs.
• Includes general-purpose I/O pins and an internal oscillator option for system integration flexibility.

Applications

• Industrial process control systems requiring high-resolution sensor interfacing.
• Weigh scales and load cell measurement applications utilizing bridge sensors.
• Medical instrumentation such as electrocardiogram (ECG) and blood pressure monitoring devices.
• Portable battery-powered test equipment benefiting from low power consumption modes.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm pinout compatibility and package dimensions. Ensure that the required operating temperature range aligns with the industrial grade specifications. Confirm interface voltage levels match the host microcontroller logic standards before integration into the design.

Selection Notes

Select this component when high resolution and low noise are critical for small signal measurements. Consider the ADS1243 if additional input channels are required without increasing the package size significantly. Evaluate the need for an external reference versus using the internal bandgap if system accuracy permits. Verify that the available clock source meets the timing requirements for the desired output data rate.

Part Context

This part belongs to the ADS124x family of precision ADCs designed for low-power, high-performance applications. It shares architectural similarities with the ADS1243 and ADS1244 but offers a specific channel count optimized for cost-sensitive designs. The IPWT suffix denotes the surface-mount TSSOP-16 package variant suitable for automated assembly processes.

Replacement Considerations

The ADS1243IPWR serves as a compatible alternative within the same series, offering similar performance characteristics with potential pinout differences due to package variations. Designers should verify register compatibility and physical footprint constraints before substituting components.