ADS7948SRTET

Analog To Digital Converters (ADC) Overview

The Texas Instruments ADS7948SRTET is a dual-channel, 10-bit successive approximation register (SAR) analog-to-digital converter. It operates with a standard sample rate of 2 MSPS and supports up to 2.57 MSPS using a short data frame optimized for the resolution. The device accepts pseudo-differential or single-ended inputs and features an SPI-compatible digital interface. It requires an external voltage reference and functions within an analog supply 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 61 dB, integral nonlinearity of 0.0488% FSR, and low power consumption of 7.5 mW.

Analog To Digital Converters (ADC) Feature Summary

• Dual-channel architecture supporting pseudo-differential and single-ended input configurations
• High-speed conversion capability with standard 2 MSPS operation and extended rates via optimized clock frames
• Low-power SAR design suitable for battery-operated applications
• Flexible supply voltage ranges allowing compatibility with various system logic levels

Analog To Digital Converters (ADC) Applications

• Data acquisition systems requiring moderate resolution and high speed
• Medical instrumentation devices
• Battery-powered equipment
• Optical networking systems
• Communication systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'TER' indicates the reel packaging format when sourcing components. Confirm that the external reference requirement is accounted for in the bill of materials, as the ADS7948 does not integrate an internal reference. Ensure the PCB layout accommodates the WQFN-16 package dimensions and thermal pad requirements for proper heat dissipation during continuous operation at maximum sampling rates.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a balance between 10-bit resolution and 2 MSPS throughput is required for dual-channel signals. Compare against the ADS7947 for higher 12-bit precision or the ADS7949 for faster 8-bit performance. Consider the ADS7946 if 14-bit resolution is necessary, noting the trade-off in power and potentially different dynamic performance characteristics. Verify that the external reference voltage matches the desired full-scale input range.

Analog To Digital Converters (ADC) Part Context

The ADS7948 belongs to the ADS794x family of ultralow-power ADCs from Texas Instruments, which also includes the ADS7945, ADS7946, ADS7947, and ADS7949. This family shares common architectural features such as the SAR core, SPI interface, and WQFN-16 packaging. The ADS7948 specifically targets applications needing 10-bit accuracy, distinguishing it from the 12-bit ADS7947 and 8-bit ADS7949 variants within the same series.

Analog To Digital Converters (ADC) Replacement Considerations

ADS7947SRTER offers 12-bit resolution with similar speed and packaging. ADS7949SRTER provides 8-bit resolution with potentially higher maximum sampling speeds. ADS7946SRTER delivers 14-bit resolution but may have different power and dynamic performance specifications.