ADS1255IDBT

Overview

The ADS1255IDBT is a 24-bit analog-to-digital converter (ADC) manufactured by Texas Instruments, housed in a 20-SSOP package. It features a delta-sigma architecture with an integrated multiplexer, programmable gain amplifier (PGA), and digital filter. The device supports data rates up to 30 kSPS and accepts differential or single-ended inputs. It operates with a 5 V analog supply and a digital supply ranging from 1.8 V to 3.6 V. The component functions within a temperature range of -40°C to 85°C and utilizes an SPI-compatible serial interface for communication.

Feature Summary

• Integrates a low-noise delta-sigma modulator with a programmable digital filter for high-resolution signal processing.
• Includes an internal multiplexer and programmable gain amplifier to support flexible input configurations.
• Provides a serial peripheral interface (SPI) compatible output for straightforward microcontroller connectivity.

Applications

• Industrial process control systems
• Medical equipment requiring high precision
• Weighing scales and load cell measurements

Procurement Notes

Verify the specific suffix IDBT corresponds to the 20-SSOP tape-and-reel packaging configuration. Confirm that the external reference voltage requirements align with system design constraints, as the device does not include an internal reference. Ensure compatibility with the target operating voltage levels for both analog and digital domains before finalizing procurement.

Selection Notes

Select this component when 24-bit resolution and speeds up to 30 kSPS are required in a compact surface-mount package. Compare against the ADS1256 if additional input channels are needed, or the ADS1251 if lower power consumption at reduced speed is prioritized. Verify that the 20-SSOP footprint fits the PCB layout constraints.

Part Context

This part belongs to the ADS125x family of high-performance ADCs from Texas Instruments. It shares architectural similarities with the ADS1256 but offers fewer input channels. The IDBT suffix denotes the industrial temperature grade and specific reel packaging format used for automated assembly processes.

Replacement Considerations

The ADS1256IDBT serves as a pin-compatible alternative offering increased input channels. For lower channel count applications, the ADS1251U/2K5 provides similar resolution in an 8-SOIC package but with different pinout and speed characteristics. Direct substitution requires verifying interface timing and input configuration differences.