ADS1251UG4

Overview

The ADS1251UG4 is a single-channel, 24-bit ResolutionPLUS sigma-delta analog-to-digital converter (ADC) manufactured by Texas Instruments. It operates with a maximum sampling rate of 20 kS/s and supports differential input configurations. The device utilizes an external reference voltage architecture and interfaces via SPI or I2C protocols. It functions within a supply voltage range of 4.75 V to 5.25 V for both analog and digital domains. The component is housed in an 8-pin SOIC package and is rated for operation between -40°C and +85°C.

Feature Summary

• Integrates a low-power sigma-delta modulator optimized for high-resolution data acquisition applications.
• Provides programmable filter characteristics that offer inherent rejection of power line interference frequencies.

Applications

• Industrial process control systems requiring precise signal measurement
• Portable battery-powered instrumentation due to low power consumption
• High-precision weight scales and load cell interfaces

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's current datasheet to confirm lead-free compliance status and RoHS alignment. Ensure the ordering part number matches the exact package variant required for the PCB footprint. Cross-reference the manufacturing date code to verify component freshness and storage history prior to assembly.

Selection Notes

Select this component when a single-channel, high-resolution conversion path is necessary without integrated programmable gain amplifiers. Confirm that the system design can accommodate an external voltage reference source, as the ADS1251UG4 does not include an internal reference. Evaluate the trade-off between the fixed 20 kS/s speed and the available resolution requirements for the target application.

Part Context

This part belongs to the ADS1251 family of ResolutionPLUS ADCs from Texas Instruments. It serves as a specialized solution for applications demanding high accuracy with minimal channel count. The UG4 designation indicates a specific packaging and environmental compliance configuration within the broader product line.

Replacement Considerations

The ADS1251U is the base equivalent part number. Verify if the G4 suffix denotes a specific material change or if it is functionally identical to the standard ADS1251U variant before substitution.