ADS1250U/1K

Overview

The ADS1250U/1K is a 24-bit analog-to-digital converter (ADC) from Texas Instruments, utilizing Sigma-Delta architecture. It features a single differential input channel and supports SPI digital interfaces. The device operates with an analog supply voltage range of 4.75 V to 5.25 V and a digital supply voltage range of 2.7 V to 5.25 V. It achieves a maximum sampling rate of 20 kS/s. Key performance metrics include a differential nonlinearity (DNL) of ±1 LSB and integral nonlinearity (INL) of ±0.0015% FSR. The component is housed in an 8-pin SOIC package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated programmable gain amplifier for signal conditioning
• On-chip low-drift voltage reference
• Built-in clock oscillator

Applications

• Industrial process control systems
• High-precision weighing scales
• Medical equipment data acquisition

Procurement Notes

Verify the specific suffix '1K' indicates cut-tape packaging when sourcing. Confirm the operating voltage requirements match the system design, as the digital supply allows lower voltages than the analog supply. Ensure the SOIC-8 footprint matches the PCB layout constraints.

Selection Notes

Select this model for applications requiring high resolution at moderate speeds. Compare against the ADS1251 if higher sampling rates are needed. Verify that the external reference configuration aligns with the internal reference capabilities if precision is critical.

Part Context

This part belongs to the ADS125x family of low-power, high-precision ADCs. It shares architectural similarities with the ADS1251 but differs in specific interface configurations or packaging options defined by the manufacturer's product line structure.

Replacement Considerations

The ADS1251U is a functional alternative within the same family. Verify pin compatibility and software register settings before substitution.