ADS1256IDBR

Overview

The ADS1256IDBR is a very low noise, 24-bit analog-to-digital converter (ADC) manufactured by Texas Instruments. It utilizes a sigma-delta architecture to achieve high precision data acquisition with a maximum sampling rate of 30 kSPS. The device features an integrated multiplexer and programmable gain amplifier (PGA), supporting up to eight single-ended or four differential input channels. It operates with an analog supply voltage range of 4.75 V to 5.25 V and a digital supply voltage range of 1.8 V to 3.6 V. Communication is handled via a standard SPI interface. The component is housed in a 28-SSOP package and is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a 24-bit sigma-delta ADC with a built-in multiplexer and programmable gain amplifier for flexible signal conditioning.
• Supports multiple input configurations, accommodating up to eight single-ended or four differential analog inputs.
• Includes hardware filters providing inherent rejection at 50 Hz and 60 Hz frequencies to suppress power line interference.

Applications

• High-resolution industrial process control systems requiring precise sensor signal digitization.
• Weigh scales and force measurement instrumentation utilizing load cell inputs.
• Medical equipment and physiological signal monitoring devices demanding low-noise performance.
• Data acquisition modules for environmental sensing and laboratory test instruments.

Procurement Notes

Verify the specific suffix against the manufacturer's current documentation to confirm pin compatibility and electrical specifications. Ensure that the ordering information matches the required package type and operating temperature range. Cross-reference the datasheet revision date to validate feature availability and compliance status before finalizing procurement orders.

Selection Notes

Select this component when application requirements prioritize resolution and noise performance over high-speed throughput. The integrated PGA reduces the need for external amplification circuitry, simplifying board layout. Consider the 30 kSPS limit when designing filter stages to prevent aliasing effects during signal processing operations.

Part Context

This part belongs to the ADS125x family of precision data converters from Texas Instruments. It shares architectural similarities with the ADS1255 but offers additional input channels through its internal multiplexer. The IDBR suffix indicates a specific tape-and-reel packaging configuration suitable for automated surface-mount assembly processes.

Replacement Considerations

The ADS1256IDBRG4 is a verified lead-free alternative within the same product family. Verify mechanical footprint compatibility and ensure that any substitute maintains the required 28-SSOP package dimensions and electrical characteristics.