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Programmable gain amplifier delivers 0.03 percent gain accuracy

Santa Clara, Calif. — National Semiconductor Corp. says its LMP8100A programmable gain amplifier (PGA) enables a new level of signal conditioning performance in sensor interface applications and data acquisition systems targeting the industrial and instrumentation markets. The LMP8100A delivers guaranteed 0.03 percent gain accuracy using a software adjustable gain (in 1-V/V increments) from 1 V/V to 16 V/V over the full industrial temperature range of -40 degrees C to 125 degrees C.

National also offers the LMP8100 semi-precision grade PGA, which provides guaranteed 0.075 percent gain accuracy over the -40 degrees C to 85 degrees C temperature rage. The amplifiers closed-loop gain is set by an array of 16 precision thin-film resistors.
At the core of the PGAs is a precision 33-MHz CMOS input, rail-to-rail, input/output (RRIO) operational amplifier with a typical open-loop gain of 110 dB.

The LMP8100A provides a slew rate of 12 V/us and a 33-MHz unity-gain bandwidth. The device's supply voltage range is 2.7 V to 5.5 V, with a 5.3 mA supply current and output current of 20 mA. A power-conserving shutdown mode reduces current consumption to 20 uA.

Pricing: Available in 14-pin SOIC packages, the LMP8100A is priced at $7 and the LMP8100 is priced at $2.50, both in quantities of 1,000.
Product information: LMP8100 and WEBENCH amplifier design tools

National Semiconductor , 1-800-272-9959, www.national.com

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