Power Electronics
High-Performance, High-Resolution, Ultra-Low-Power SAR ADCs

High-Performance, High-Resolution, Ultra-Low-Power SAR ADCs

Texas Instruments (TI) expanded its SAR (successive approximation register) analog-to-digital converter (ADC) product portfolio with a new family of 12 devices that provide the industry's widest analog supply and common-mode voltage ranges. The 1-channel ADS8881 family includes high-performance, ultra-low power 18- and 16-bit SAR ADCs with speed options ranging from 100 kSPS to 1 MSPS.

Designers can chose the right ADC for their designs in a wide variety of applications, from high-end industrial, such as high-performance test and measurement equipment, precision metrology and precision sensor transmitters for industrial automation, to battery-operated test and measurement and portable medical.

Key benefits

Widest input common mode: Most of the new ADCs provide an input common-mode range that is 20x wider than other devices. This simplifies signal conditioning and enables system designers to more easily digitize the difference between two independent sensor signals with widely varying common-mode voltage values over time.

Flexible analog and digital supply voltage ranges: Features an analog supply voltage range of 2.7 V to 3.6 V, three times wider than existing devices. This enables direct operation from a Lithium-Ion battery. Also, with an even wider digital supply voltage range of 1.65 V to 3.6 V, the ADCs meet most microprocessor supply requirements.

Ultra-low power: The 1-MSPS SAR ADCs consume only 5.5 mW of power at 1 MSPS and 55 uW at 10 kSPS, making them suitable for pulsed DC measurements in portable medical and heat-sensitive automated test applications.

Large pin-compatible family: All 12 devices are pin-compatible and available in both MSOP and QFN package options, enabling engineers to reuse the same analog signal chain design across their products with minimal, if any, redesign.

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