ADS1278SHKP

Overview

The ADS1278SHKP is an octal, 24-bit sigma-delta analog-to-digital converter (ADC) manufactured by Texas Instruments. It features eight fully differential analog inputs and supports a maximum sampling rate of 144 kSPS per channel. The device integrates programmable gain amplifiers (PGAs) with gains ranging from 1 to 128. Electrical specifications include a signal-to-noise ratio (SNR) of 111 dB, an effective number of bits (ENOB) of 17.4 bits, and an integral nonlinearity (INL) of 0.0014% of the full-scale range. It operates with a 5 V analog supply and a 1.8 V digital supply, consuming approximately 530 mW at full speed. The component utilizes an SPI interface for data communication.

Feature Summary

• Integrates eight independent channels with simultaneous sampling capabilities for multi-channel acquisition.
• Includes built-in programmable gain amplifiers to accommodate varying input signal amplitudes without external components.
• Features a daisy-chainable architecture allowing multiple devices to be connected via a single serial interface.
• Provides high-resolution conversion with low noise performance suitable for precision measurement applications.

Applications

• Industrial process control and high-precision measurement systems
• Medical equipment requiring accurate physiological signal acquisition
• Acoustic analysis and audio testing instrumentation

Procurement Notes

Verify the specific suffix SHKP against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required operating voltage levels and interface protocols before integration. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Cross-reference the part number with current datasheets to validate any recent design changes or obsolescence notices.

Selection Notes

Select this component when designing systems that require simultaneous sampling across multiple channels with high resolution. Consider the 144 kSPS throughput and 24-bit accuracy for applications demanding precise signal fidelity. Evaluate the power consumption profile relative to system thermal constraints. Ensure the host microcontroller supports the necessary SPI timing and daisy-chain configuration for efficient data retrieval.

Part Context

The ADS1278 belongs to Texas Instruments' family of high-speed, high-resolution sigma-delta ADCs. It is designed to replace older discrete solutions or lower-performance converters in demanding environments. The device complements other TI data converters by offering integrated PGA functionality and flexible input ranges. It serves as a critical interface between analog sensors and digital processing units in advanced instrumentation.

Replacement Considerations

Direct substitutes within the same family include the ADS1278IPAPR and ADS1278IPAPT. Verify pinout compatibility and electrical parameter equivalence before substitution. Check for any differences in packaging or suffix codes that might affect mechanical fit or handling requirements.