ADS1241E

Overview

The ADS1241E is a 24-bit analog-to-digital converter from Texas Instruments, utilizing sigma-delta architecture. It features four differential input channels and supports SPI and 3-wire serial interfaces. The device operates on dual power supplies ranging from 2.7 V to 5.25 V for both analog and digital domains. Key electrical specifications include a maximum sampling rate of 15 S/s, a signal-to-noise ratio of 114 dB, and low power consumption of 600 µW. Nonlinearity errors are specified at +/- 1 LSB for DNL and +/- 0.0015% FSR for INL. It functions within a temperature range of -40°C to +85°C and is housed in an SSOP-24 package.

Feature Summary

• Integrated programmable gain amplifier (PGA) with gains up to 128
• Built-in internal reference oscillator and external reference capability
• On-chip GPIO pins for system control flexibility
• High common-mode rejection ratio for noise suppression

Applications

• Industrial process control systems
• Weigh scales and load cell measurements
• Medical instrumentation
• Portable battery-powered devices

Procurement Notes

Verify the specific suffix 'E' indicates the commercial temperature grade (-40°C to +85°C). Confirm the package type matches the design requirements, typically SSOP-24 for this variant. Check RoHS compliance status as indicated by manufacturer documentation. Ensure the source document corresponds to the exact part number to avoid confusion with similar ADS124x family members.

Selection Notes

Select the ADS1241E when high resolution and multiple differential inputs are required without external multiplexers. Compare against ADS1240 if fewer channels are sufficient or ADS1242 for single-ended inputs. Consider the integrated PGA to reduce external component count. Verify interface compatibility with the host microcontroller's SPI mode.

Part Context

This component belongs to the ADS124x series of precision ADCs designed for low-power, high-resolution applications. It shares architectural similarities with the ADS1240 and ADS1242 but offers distinct channel configurations. The series is widely used in industrial and medical fields requiring accurate DC signal measurement.

Replacement Considerations

ADS1240EG4 is a verified substitute within the same family, offering similar performance with potentially different channel counts or pinouts. Verify pin compatibility and software register settings before substitution.