ADS1254E/2K5G4

Overview

The ADS1254E/2K5G4 is a 24-bit analog-to-digital converter (ADC) manufactured by Texas Instruments. It features four differential inputs and utilizes sigma-delta architecture for high-resolution data acquisition. The device supports sampling rates up to 20 kSPS and communicates via an SPI-compatible digital interface. It operates with a single 5 V analog supply and a digital supply ranging from 1.8 V to 3.6 V. The component is housed in a 20-lead SSOP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a programmable gain amplifier and on-chip reference for signal conditioning
• Provides low-noise performance suitable for precision measurement applications
• Supports flexible input configurations including differential and pseudo-differential modes

Applications

• Industrial process control systems
• Weigh scales and load cell interfaces
• Medical instrumentation

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's current datasheet to confirm compliance with RoHS directives and lead-free status. Ensure the ordering part number matches the required tape and reel quantity, typically 2500 units, as indicated by distributor listings. Confirm package dimensions match the 20-SSOP specification before finalizing procurement.

Selection Notes

Select this component when high resolution and multiple differential channels are required in a compact form factor. Compare power consumption specifications if battery operation is critical, noting the separate analog and digital supply requirements. Verify that the SPI interface timing aligns with the host microcontroller capabilities and that the input voltage ranges accommodate the sensor signals.

Part Context

This part belongs to the ADS125x family of 24-bit sigma-delta ADCs. It shares architectural similarities with the ADS1251, ADS1252, and ADS1255 but offers four input channels compared to the single or dual-channel variants. The 'G4' suffix typically denotes lead-free and RoHS-compliant packaging variations within the standard ADS1254 product line.

Replacement Considerations

Direct pin-to-pin replacements include the ADS1254E and ADS1254IPW. For fewer channels, consider the ADS1252 or ADS1251. For more channels, evaluate the ADS1255. Verify that any substitute maintains the same 24-bit resolution and 20 kSPS speed to ensure system performance parity.