ADS1278SKGDA

Overview

The ADS1278SKGDA is a die-level, octal, 24-bit simultaneous sampling analog-to-digital converter (ADC) manufactured by Texas Instruments. It utilizes a sigma-delta architecture to provide eight independent channels with high precision. The device supports data rates up to 128 kSPS and features an SNR of 111 dB in high-resolution mode. It operates with a 5 V analog supply and a 1.8 V digital core supply. Key performance metrics include a typical offset drift of 0.8 µV/°C and a gain drift of 1.3 ppm/°C. The component is housed as a bare die for integration into custom substrates or systems requiring extreme environmental tolerance.

Feature Summary

• Simultaneous sampling across eight channels ensures precise phase alignment for multi-channel signal acquisition.
• Integrated linear-phase finite impulse response (FIR) digital filters provide wide bandwidth with minimal passband ripple.
• Chopper-stabilized modulator design achieves ultra-low offset drift and low in-band noise for high DC accuracy.
• Hardware-configurable operating modes allow optimization of speed, resolution, and power consumption without register programming.

Applications

• High-temperature industrial process control and monitoring
• Downhole drilling equipment and seismic data acquisition
• Structural health monitoring and vibration analysis
• Multi-channel dynamic strain measurement systems

Procurement Notes

Verify the specific suffix designation against official Texas Instruments documentation to confirm the exact temperature range and qualification level. As a die product, ensure that handling procedures account for moisture sensitivity and electrostatic discharge risks during assembly. Confirm substrate compatibility and thermal management requirements for the intended application environment prior to procurement.

Selection Notes

Select this component when system design requires integrated simultaneous sampling at 24-bit resolution without the area penalty of a packaged IC. Consider the HTQFP-64 or HFQ package alternatives if surface-mount assembly capabilities are preferred over direct die attachment. Evaluate the need for extended industrial temperature ranges (-55°C to 210°C) which may dictate the specific revision or packaging option required for reliability.

Part Context

The ADS1278SKGDA belongs to the ADS1278 family of octal ADCs, designed for applications demanding high channel count and synchronization. Unlike standard commercial variants, the SKGDA suffix typically denotes a die configuration optimized for specialized packaging or extreme environmental conditions. This places it within Texas Instruments' portfolio of high-performance data converters used in critical infrastructure and harsh environment sensing.

Replacement Considerations

Direct pin-compatible replacements are not available due to the bare die format. Equivalent functionality can be achieved using packaged ADS1278 variants such as the ADS1278IPAPT or ADS1278MPAPTEP, provided the system design accommodates the additional board space and thermal characteristics of the HTQFP-64 package.