TI claims smallest 12-, 14- and 16bit SAR ADCs

10 September 2014

According to the company, ADCs push size, power and performance boundaries for industrial monitoring and control.

Engineers can reduce the size of an industrial monitoring and control applications with its successive approximation register (SAR) ADCs. The ADS7042 is, claims the company, the industry’s smallest and lowest-power 12-bit SAR ADC, and the ADS8354 family includes the industry’s smallest 14- and 16-bit, simultaneous-sampling SAR ADCs.

The 1-MSPS ADS7042 uses only 690µW of power at full speed and scales consumption down with sampling rate to unprecedented levels for use in ultra-low-power systems. At 1ksample/s, for example, the ADS7042 consumes less than 1µW of power, enabling its use in remote system monitoring and energy harvesting applications. It can also be used in motor control, metering, and portable medical equipment, as well as space-constrained consumer applications, such as hard disk drives, computer peripherals, wearable fitness and smartphones.

It is packaged in a 1.5 x 1.5mm package, which is 44% smaller than competitive devices, claims the company.

The two-channel ADS8354 family includes the industry’s smallest 14- and 16-bit simultaneous sampling SAR ADCs. With data rates ranging from 600ksample/s- to two MSPS-per-channel, no latency and dual, independently controllable internal voltage references, the family is optimised for the industrial market, most notably motor control, DC load control, optical networking, power quality, industrial automation and programmable logic controllers (PLCs). It measures 3 x 3 mm with two independently programmable voltage references, which enables separate full-scale ranges/channel. This reduces the need for external signal conditioning circuitry and cuts overall board space to further shrink industrial designs.

The 12-, 14- and 16bit family includes 11 devices with data rates from 600ksample/s to 2MSPS and with single-ended or differential inputs, which allows designers to customise the analogue signal chain to meet their industrial system needs.

ADC demonstration kits include an evaluation module (EVM) and simple capture card for plug-and-play functionality, eliminating online software installations. To further speed evaluation time, the kits’ intuitive, easy-to-use graphical user interface (GUI) enables designers to quickly evaluate ADC performance in specific end equipment.

SAR ADC SPICE models to ease system-level design of input and voltage reference drive circuitry and IBIS models to perform timing analyses are also available.

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