ADS7949SRTER

Analog To Digital Converters (ADC) Overview

The Texas Instruments ADS7949SRTER is an 8-bit successive approximation register (SAR) analog-to-digital converter housed in a 16-WQFN package. It features two pseudo-differential or single-ended input channels and operates with a standard SPI interface at a sample rate of 2 MSPS. The device supports an analog supply voltage range of 2.7 V to 5.25 V and a digital supply voltage range of 1.65 V to 5.25 V. Key performance metrics include a signal-to-noise ratio (SNR) of 49 dB, an integral nonlinearity (INL) of 0.12% FSR, and a typical power consumption of 11.5 mW. It functions within a temperature range of -40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• Supports high-speed data acquisition with a 2 MSPS sampling rate using a standard 16-clock data frame.
• Features low power consumption suitable for battery-powered equipment and portable applications.
• Offers flexible input configurations with dual channels supporting both pseudo-differential and single-ended modes.

Analog To Digital Converters (ADC) Applications

• Data acquisition systems requiring moderate resolution and speed
• Battery-powered equipment where power efficiency is critical
• Medical instrumentation and portable diagnostic devices

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'TER' indicates the tape and reel packaging format when ordering. Confirm that the external reference voltage requirements align with your system design, as this component utilizes an external reference. Ensure PCB layout accounts for the WQFN-16 thermal pad requirements to maintain optimal performance within the specified operating temperature range.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS7949SRTER when an 8-bit resolution is sufficient for the application, offering a balance between cost and performance compared to higher-resolution variants like the ADS7947 or ADS7948. Consider this part for designs requiring dual-channel input with a 2 MSPS throughput. Verify that the 1.65 V to 5.5 V digital logic levels are compatible with the host microcontroller or DSP interface.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADS794x family of ultralow-power ADCs from Texas Instruments, which also includes the 12-bit ADS7947 and the 10-bit ADS7948. All members share similar pinouts and interfaces but differ in resolution and maximum achievable sample rates when using optimized short data frames. The ADS7949 provides the lowest power consumption among the family due to its 8-bit architecture.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7948SRTER serves as a direct upgrade path if higher 10-bit resolution is required while maintaining the same package and interface. For lower resolution needs, the ADS7947SRTER offers 12-bit precision. Ensure any substitute maintains the 16-WQFN footprint and compatible supply voltage ranges.