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Low-power voltage reference comes in micro package

Posted: 05 Oct 2007 ?? ?Print Version ?Bookmark and Share

Keywords:voltage reference? portable devices? test equipment?

Texas Instruments Inc. (TI) has released a family of low-power (5?A) series voltage references featuring high accuracy and low temperature drift in a SC70-3 package, 40 percent smaller than a SOT23.

The combination of micro-size packaging and low current consumption make the REF33xx family suitable for portable and battery-powered consumer applications, and its high accuracy of 0.15 percent max and 30ppm/C max low temperature drift make it suitable for medical equipment, handheld instrumentation, test equipment and data acquisition systems.

High initial accuracy, low noise (28uVpp/V output) and a robust output drive of +/-5mA enable precision, low power ADC (such as ADS1000 and ADS7866) and MSP430 applications. The low temperature drift minimizes system error over temperature. Additionally, the low dropout voltage of 110mV supports precision spot voltage regulation for battery-powered applications.

The REF33xx family offers six output voltages: 1.25V (REF3312), 1.8V (REF3318), 2.048V (REF3320), 2.5V (REF3325), 3.0V (REF3330) and 3.3V (REF3333). The devices can operate at a supply voltage 110mV above the output voltage under specified load conditions, except the REF3312 which requires a minimum supply voltage of 1.8V. All models in this family are designed for the wide industrial temperature range of -40C to 125C.

The six versions of the REF33xx family are available in SOT23-3 and SC70-3 packages priced at 85 cents in 1,000-piece quantities.

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