ADS1255IDBR

Overview

The ADS1255IDBR is a 24-bit analog-to-digital converter (ADC) from Texas Instruments, utilizing sigma-delta architecture. It features two channels with single-ended input capability and supports I2C and SPI interfaces. The device operates at sampling rates up to 30 kS/s. Analog supply voltage ranges from 4.75 V to 5.25 V, while digital supply voltage ranges from 1.8 V to 3.6 V. It is housed in a 20-SSOP package. Key performance metrics include differential nonlinearity of +/- 2 LSB and integral nonlinearity of +/- 0.001% FSR. Power consumption is specified at 36 mW typical, with maximum power dissipation at 57 mW. Operating temperature spans from -40°C to +85°C.

Feature Summary

• Integrated programmable gain amplifier (PGA) for signal conditioning
• Built-in 50/60 Hz rejection filters for noise suppression
• General-purpose input/output (GPIO) pins for system flexibility

Applications

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

Procurement Notes

Verify the specific ordering suffix IDBR corresponds to the SSOP-20 package and reel packaging configuration. Confirm RoHS compliance status and moisture sensitivity level requirements prior to integration. Ensure the external reference voltage source matches the device's input specifications for optimal accuracy. Check for any specific handling precautions related to the surface-mount technology used in this component variant.

Selection Notes

Select the ADS1255IDBR when a 24-bit resolution with dual-channel capability is required. This model is suitable for applications needing integrated PGA and digital filtering without external components. Consider the 20-SSOP package constraints for PCB layout. Compare against single-channel variants if only one input is needed, or higher-speed models if throughput exceeds 30 kS/s requirements.

Part Context

The ADS1255 belongs to the ResolutionPlus family of high-performance ADCs from Texas Instruments. It shares architectural similarities with the ADS1256 but differs in channel count and pinout. The IDBR suffix indicates a tape-and-reel packaging format intended for automated assembly processes. This part complements other devices in the series by offering a balance between precision and interface flexibility for embedded systems.

Replacement Considerations

ADS1255IDBT is a direct replacement with identical electrical characteristics but in cut-tape packaging. ADS1256IDBR offers similar performance with additional input channels. Verify pin compatibility and software register configurations when substituting with these alternatives.