ADS7947SRTER

Analog To Digital Converters (ADC) Overview

The Texas Instruments ADS7947SRTER is a dual-channel, 12-bit successive approximation register (SAR) analog-to-digital converter. It operates with a standard sample rate of 2 MSPS using a 16-clock data frame, or up to 2.1 MSPS with an optimized short frame. The device supports pseudo-differential and single-ended inputs via an internal multiplexer. It functions on an analog supply voltage range of 2.7 V to 5.5 V and a digital supply range of 1.65 V to 5.5 V. Key performance metrics include a signal-to-noise ratio of 72 dB, a signal-to-noise and distortion ratio of 72.75 dB, and integral nonlinearity of 0.0244% FSR. Power consumption is 7.5 mW, and it operates within a temperature range of -40°C to +125°C in a 16-WQFN package.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel architecture with integrated multiplexer and sample-and-hold circuitry for efficient data acquisition.
• Low-power SAR design enabling operation at 7.5 mW while maintaining high dynamic performance.
• Flexible input configuration supporting both pseudo-differential and single-ended signal types.
• Standard SPI-compatible serial interface for straightforward digital communication.

Analog To Digital Converters (ADC) Applications

• Battery-powered equipment requiring low power consumption.
• Medical instrumentation systems.
• Data acquisition systems.
• Optical networking applications.
• Communication systems.

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'TER' corresponds to the reel packaging format as indicated by distributor listings. Confirm RoHS compliance status and moisture sensitivity level (MSL 2) requirements for your assembly process. Ensure the external reference voltage matches the ADC's input specifications for optimal accuracy. Cross-check the 16-WQFN footprint dimensions against your PCB layout guidelines before finalizing procurement orders.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution is required for dual-channel signals. Consider the ADS7948 or ADS7949 if lower resolution allows for higher sampling rates up to 3 MSPS. Verify that the system can accommodate the separate analog and digital supply rails. Ensure the application does not require an internal voltage reference, as this part utilizes an external reference.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS794x family, which includes the ADS7947 (12-bit), ADS7948 (10-bit), and ADS7949 (8-bit). All members share similar architectures and interfaces but offer different resolutions and maximum sampling rates depending on the data frame configuration. The ADS7947 specifically targets applications needing 12-bit precision at 2 MSPS.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7948SRTET and ADS7949SRTET are pin-compatible alternatives within the same series offering 10-bit and 8-bit resolutions respectively. These may be suitable if higher sampling speeds are needed. No other direct substitutes are confirmed in the provided documentation.