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LMP8358MA Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LMP8358MA Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 32 page  LMP8358 May 5, 2010 Zero-Drift, Programmable Instrumentation Amplifier with Diagnostics General Description The LMP8358 is a precision programmable-gain instrumen- tation amplifier in National's LMP® precision amplifier family. Its gain can be programmed to 10, 20, 50, 100, 200, 500, or 1000 through an SPI-compatible serial interface or through a parallel interface. Alternatively, its gain can be set to an arbi- trary value using two external resistors. The LMP8358 uses patented techniques to measure and continuously correct its input offset voltage, eliminating offset drift over time and tem- perature and the effect of 1/f noise. Its ground-sensing CMOS input features a high CMRR and low input bias currents. It is capable of sensing differential input voltages in a common- mode range that extends from 100mV below the negative supply to 1.4V below the positive supply, making it an ideal solution for interfacing with ground-referenced sensors, sup- ply-referenced sensor bridges, and any other application re- quiring precision and long-term stability. Additionally, the LMP8358 includes fault detection circuitry to detect open and shorted inputs and deteriorating connections to the signal source. Other features that make the LMP8358 a versatile solution for many applications are its rail-to-rail output, low input voltage noise and high gain-bandwidth product. Features Typical Values unless otherwise noted, T A = 25°C ■ Supply voltage 2.7V to 5.5V ■ Supply current 1.8 mA ■ Max gain error 0.15% ■ Max gain drift 16 ppm/°C ■ Min CMRR 110 dB ■ Max offset voltage 10 µV ■ Max offset voltage drift 50 nV/°C ■ GBW (gain = 10) 8 MHz ■ Max non-linearity 100 ppm ■ Operating temperature range −40°C to 125°C ■ Input fault detection ■ SPI or pin configurable modes ■ EMIRR at 1.8GHz 92 dB ■ 14-Pin SOIC and 14-Pin TSSOP Package Applications ■ Bridge sensor amplifier ■ Thermopile amplifier ■ Portable instrumentation ■ Medical instrumentation ■ Precision low-side current sensing Typical Application 300454g1 LMP® is a registered trademark of National Semiconductor Corporation. © 2010 National Semiconductor Corporation 300454 www.national.com |
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