ADS1248IPW

Overview

The ADS1248IPW is a high-precision, low-noise 24-bit analog-to-digital converter (ADC) from Texas Instruments, housed in a 28-pin TSSOP package. It features an 8-channel multiplexer supporting differential and single-ended inputs, with a maximum sampling rate of 2 kSPS. The device utilizes a delta-sigma architecture and includes a programmable gain amplifier (PGA) with gains up to 128. Power consumption is typically 2.3 mW at 2 kSPS. It operates on analog and digital supply voltages ranging from 2.7 V to 5.25 V and supports an operating temperature range of -40°C to +105°C.

Feature Summary

• Integrated dual matched programmable excitation current sources (iDACs) for sensor biasing
• Built-in low-drift internal voltage reference and temperature sensor
• Supports simultaneous 50 Hz and 60 Hz line frequency rejection
• Includes general-purpose I/O pins and system monitoring capabilities

Applications

• Resistance Temperature Detector (RTD) measurement systems
• Thermocouple signal conditioning and acquisition
• Precision pressure and flow meter instrumentation
• Industrial process control and factory automation sensors

Procurement Notes

Verify the specific suffix against official documentation to confirm pinout and functionality. The IPWR suffix indicates a tape-and-reel packaging format suitable for automated surface-mount assembly. Ensure compatibility with existing SPI interface designs and power supply requirements before integration into production hardware.

Selection Notes

Select this component when eight independent input channels are required for high-resolution data acquisition. It is suitable for applications demanding low noise performance and integrated signal conditioning features such as PGA and iDACs. Compare channel count and resolution requirements against the ADS1246 and ADS1247 variants if fewer inputs suffice.

Part Context

The ADS1248 belongs to the ADS124x family of 24-bit ADCs designed for precision sensor measurements. It shares architectural similarities with the ADS1246 and ADS1247 but distinguishes itself by offering eight multiplexed input channels compared to four or two in its siblings. This family targets industrial applications requiring high accuracy and integrated front-end capabilities.

Replacement Considerations

The ADS1247 and ADS1246 are functionally similar members of the same family but offer fewer input channels. Verify that the reduced channel count meets application needs. No direct cross-manufacturer substitutes are confirmed in public documentation.