Austin, Texas - A proprietary MultiPath design developed initially by Cirrus Logic Inc. for dc measurement analog-to-digital (A/D) converters is working in operational amplifiers to achieve low noise with low drift, as well as high open-loop gain and low-voltage operation, according to the company.
Cirrus designed the CS-3001 family of single and dual op amps for signal conditioning in such low-frequency, precision instrumentation applications as thermocouple signals for temperature measurement, or signals from load cells to measure weight.
The op amps are said to be among the first to feature simultaneous low noise (6 nanovolts per square root hertz at 0.5 Hz with a 0.08-Hz 1/f noise corner frequency) with low drift (0.05 microvolt/ degrees C maximum) and high open-loop gain (10 billion minimum). They are also said to offer excellent common-mode rejection ratio and power supply rejection ratio, and their common-mode input range includes the negative supply rail.
The CS3001, 3002, 3011 and 3012 are sampling now in an eight-pin small-outline IC package. The CS3001 and CS3011 are priced at $1.94 and the CS3002 and CS3012 are priced at $3.02, all in 10,000-unit quantities.
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