ADS1258IRTCT

Overview

The ADS1258IRTCTEP is a 16-channel, 24-bit analog-to-digital converter (ADC) from Texas Instruments. It utilizes sigma-delta architecture to deliver high precision with no missing codes. The device supports differential or single-ended inputs via a flexible multiplexer. Key electrical parameters include a resolution of 24 bits, a maximum sampling rate of 125 kS/s per channel, and an effective number of bits (ENOB) of 21.6. It operates on a digital supply voltage ranging from 2.7 V to 5.25 V and an analog supply of 4.75 V to 5.25 V. The component features SPI interface communication, GPIOs, an internal oscillator, and a temperature sensor. It is housed in a 48-pin VQFN package and rated for operation between -55°C and +125°C.

Feature Summary

• High-resolution 24-bit data conversion capability without missing codes
• Integrated 16-channel multiplexer supporting both differential and single-ended input configurations
• Built-in system monitoring registers for power supply, temperature, reference voltage, gain, and offset tracking
• On-chip programmable sensor bias current source for sensor integrity verification

Applications

• Medical equipment requiring high-precision signal acquisition
• Aerospace and defense systems demanding extended temperature range reliability
• Industrial process control instrumentation
• Multi-channel test and measurement systems

Procurement Notes

Verify the specific suffix against official datasheets to confirm environmental qualification and packaging details. The ADS1258IRTCTEP designation indicates an enhanced product variant intended for high-reliability applications. Confirm export compliance requirements as this item may require additional documentation for international shipping. Ensure the ordering part number matches the exact temperature grade and package type required for the design.

Selection Notes

Select this component when designing systems that require simultaneous multi-channel acquisition with high accuracy. The fixed channel mode allows up to 125 kSPS, while auto-scan mode provides approximately 23.7 kSPS per channel across all inputs. Consider the 42 mW typical power dissipation for thermal management. The device supports both unipolar (5 V) and bipolar (±2.5 V) reference inputs, offering flexibility for various sensor types.

Part Context

This part belongs to the ADS1258 family of precision ADCs. The IRTCTEP suffix denotes the industrial/extended temperature range version in a cut-tape reel format within the VQFN-48 package. It shares core specifications with other ADS1258 variants but is specifically qualified for harsh environments. The base ADS1258 series is widely used in applications requiring low noise and high linearity.

Replacement Considerations

Direct substitutes include ADS1258IRTCR and ADS1258IPHPREP, which share identical electrical characteristics but differ in packaging (VQFN vs. HTQFP). Verify pin compatibility and thermal performance when switching packages. Other members of the ADS1258 family may offer different temperature grades or package options.