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 Low-current, low-noise operational amplifiers for battery-powered applications Jan 11, 2006 11:57 AM
Texas Instruments has introduced a family of precision, micro-powered operational amplifiers from the company's Burr-Brown product line. The OPA379 family operates from a 1.8 V to 5.5 V, single-supply voltage, requires very little quiescent current (2.9 microamperes) and exhibits exceptionally low noise (80 nV(Hz)1/2 relative to the quiescent current. The micro-size packages make the devices ideal for battery-powered applications. This product family offers an impressive unity gain bandwidth/quiescent current (90 kHz/2.9 microampere) ratio. The mix of specifications cited above, combined with a Vos of 1.5 mV max, a CMRR of at least 90 dB, a PSRR of 10 microvolt/V maximum and a 100 dB AOL minimum means that this product family is well suited for designs requiring high precision and low power consumption. The reduced package size of the OPA379 enables compact implementation in a variety of applications, including designs with TI's MSP430 low-power microcontrollers -- as well as handheld medical instruments, remote sensors, gas detection and wireless metering. The OPA379 (single) and OPA2379 (dual) are available in SOIC packages. SOT-23 and SC70 versions will be offered later this quarter, along with a quad version, the OPA4379, in a TSSOP package. The single and dual versions are priced at $0.75 and $1.10, respectively, in 1000-piece quantities.
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