ADS1240E/1K

Overview

The ADS1240E/1K is a 24-bit sigma-delta analog-to-digital converter (ADC) from Texas Instruments, supplied in a tape-and-reel packaging format. It features four differential input channels with an integrated programmable gain amplifier (PGA). The device supports serial interface communication and includes an internal oscillator. Key electrical specifications include a resolution of 24 bits, a maximum data rate of 20 kilohertz, and a supply voltage range of 2.7 to 5.5 volts for both analog and digital domains. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• High-resolution 24-bit sigma-delta architecture for precision measurement
• Integrated programmable gain amplifier supporting multiple gain settings
• Four differential input channels with built-in excitation current sources
• Low-power operation with dedicated power-down modes

Applications

• Industrial process control systems requiring high-precision signal acquisition
• Weighing scales and load cell measurement applications
• Medical instrumentation such as ECG and blood pressure monitors
• Portable battery-powered test equipment

Procurement Notes

Verify the specific suffix '1K' indicates tape-and-reel packaging when ordering. Confirm that the device meets the required environmental specifications for your application. Ensure compatibility with the host microcontroller's serial interface timing requirements. Check for any recent lifecycle status updates or obsolescence notices from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when four differential inputs are necessary without external multiplexing. Consider the internal PGA to reduce noise from external amplifiers. Evaluate the 20 kHz maximum data rate against system speed requirements. Compare power consumption in active versus power-down modes if battery life is critical for the target application design.

Part Context

This part belongs to the ADS124x family of high-precision ADCs. It shares architectural similarities with the ADS1241 and ADS1242 but differs in channel count and feature sets. The 'E' designation typically refers to the industrial temperature grade, while 'G4' often denotes lead-free compliance in related variants. It serves as a direct replacement for older Burr-Brown precision ADCs in legacy designs.

Replacement Considerations

The ADS1241E/1K is a pin-compatible alternative offering two differential inputs instead of four. The ADS1242E/1K provides two differential inputs with additional features. Verify register compatibility and software configuration differences when migrating between these family members to ensure seamless integration.