ADS1248IPWR

Overview

The ADS1248IPWR is a low-noise, precision 24-bit analog-to-digital converter (ADC) from Texas Instruments, housed in a TSSOP-28 surface-mount package. It features an eight-channel multiplexed input architecture with differential input capability and supports SPI digital interfaces. The device operates on dual power supplies ranging from 2.7 V to 5.25 V for both analog and digital domains. Key performance metrics include a maximum sampling rate of 2 kSPS, a typical power consumption of 2.3 mW, and a guaranteed differential nonlinearity (DNL) of +/- 1 LSB. It functions within an extended industrial temperature range of -40°C to +105°C.

Feature Summary

• Integrated excitation current sources (iDACs) enable direct drive for resistive sensors such as RTDs without external circuitry.
• Built-in programmable gain amplifier (PGA) allows flexible signal conditioning for varying input voltage ranges.
• On-chip oscillator and internal reference options simplify system design by reducing component count.
• General-purpose I/O pins provide additional connectivity flexibility for system control and status monitoring.

Applications

• Industrial process control systems requiring high-resolution sensor data acquisition.
• Weigh scales and force measurement instruments utilizing load cells.
• Thermal management systems employing RTD or thermocouple inputs.
• Medical equipment demanding precise physiological signal monitoring.

Procurement Notes

Verify the specific suffix IPWR against the manufacturer's latest datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with your board's thermal management requirements given the TSSOP-28 form factor. Cross-reference the ordering part number with official distributor catalogs to validate authenticity and avoid counterfeit components during sourcing.

Selection Notes

Select this component when 24-bit resolution and multi-channel capability are required for precision sensing applications. Compare against the ADS1246 and ADS1247 if channel count or pinout constraints differ. Consider the integrated iDACs and PGA features to determine if external signal conditioning circuits can be eliminated, thereby reducing overall bill of materials cost and board space.

Part Context

This device belongs to the ADS124x family of delta-sigma ADCs, which shares architectural similarities with the ADS114x series but offers higher resolution. It is often evaluated using the ADS1248EVM-PDK platform for performance validation. The IPWR suffix specifically denotes the TSSOP-28 package variant optimized for automated surface-mount assembly processes.

Replacement Considerations

The ADS1246 and ADS1247 are functional equivalents within the same family, differing primarily in channel count and package size. Verify pin compatibility and software register settings before substitution. No other direct cross-brand replacements are confirmed in public documentation.