ADS1278IPAPTG4

Overview

The ADS1278IPAPTG4 is an octal, 24-bit simultaneous-sampling analog-to-digital converter (ADC) from Texas Instruments. It features a delta-sigma architecture with eight independent channels and supports data rates up to 144 kSPS. The device operates on a 5 V analog supply (4.75 V to 5.25 V) and a 1.65 V to 2.2 V digital supply. Key electrical specifications include a signal-to-noise ratio of 111 dB, differential nonlinearity of ±1 LSB, and integral nonlinearity of ±0.0012% FSR. It utilizes an external reference and communicates via an SPI interface. The component is housed in a 64-pin HTQFP package and functions within a temperature range of -40°C to +105°C.

Feature Summary

• Provides true simultaneous sampling across all eight channels using independent modulators and filters synchronized by a common clock.
• Integrates high-order sigma-delta modulation with linear-phase finite impulse response digital filtering for superior dynamic performance.
• Supports daisy-chainable serial interfaces to simplify multi-device system architectures and reduce pin count.
• Delivers low offset drift and gain drift characteristics suitable for precision industrial measurement applications.

Applications

• Vibration analysis and structural health monitoring systems
• Medical monitoring equipment requiring high channel counts
• Acoustic and dynamic strain measurement devices
• Pressure measurement instrumentation

Procurement Notes

Verify the suffix G4 indicates lead-free compliance when sourcing this specific variant. Confirm the package designation matches the required HTQFP-64 footprint for PCB layout compatibility. Ensure the supplier provides valid RoHS documentation consistent with the manufacturer's current environmental declarations for this part number.

Selection Notes

Select this model when eight-channel simultaneous sampling is required for phase-sensitive measurements. Compare against the ADS1274 if only four channels are needed. Evaluate power consumption requirements as the device offers multiple operating modes including high-speed and low-power options depending on the selected data rate.

Part Context

This component belongs to the ADS127x family of high-performance industrial ADCs. It shares architectural similarities with the ADS1274 but expands the input count to eight channels. The IPAPTG4 designation specifies the surface-mount package type and lead-free manufacturing process within the standard ADS1278 product line.

Replacement Considerations

The ADS1278IPAPR serves as the reel-pack equivalent of this cut-tape unit. For lower channel counts, the ADS1274 series may be considered. Verify that any substitute maintains the same 64-pin HTQFP outline dimensions and thermal characteristics.