LMP7731 Datasheet | National Semiconductor

Description The LMP7731 is a single, low noise, low offset voltage, railto-rail input and output, low voltage precision amplifier. The LMP7731 is part of the LMP® precision amplifier family and is ideal for precision and low noise applications with low voltage requirements. This operational amplifier offers low voltage noise of 2.9 n V/ with a 1/f corner of only 3 Hz and low DC offset with a maximum value of ±40 µV, targeting high accuracy, low frequency applications. The LMP7731 has bipolar input stages with a bias current of only 1.5 n A. This low input bias current, plemented by the very low AC and DC levels of voltage noise, makes the LMP7731 an excellent choice for photometry applications. The LMP7731 provides a wide GBW of 22 MHz while consuming only 2 m A of current. This high gain bandwidth along with the high open loop gain of 130 d B enables accurate signal conditioning in applications with high closed loop gain requirements. The LMP7731 has a supply voltage range of 1.8V to 5.5V, making it an ideal choice for battery operated portable applications. The LMP7731 is offered in a 5-pin SOT23 package. Features (Typical values, TA = 25°C, VS = 5V) - Input voltage noise - f = 3 Hz - f = 1 k Hz - Offset voltage (max) - Offset voltage drift (max) - CMRR - Open loop gain - GBW - Slew rate - THD @ f = 10 k Hz, AV = +1, RL = 2 kΩ - Supply current per channel - Supply voltage range - Operating temperature range - Input bias current - RRIO - 5-Pin SOT23 package 3.3 n V/√Hz 2.9 n V/√Hz ±40 µV ±1.0 µV/°C 130 d B 130 d B 22 MHz 2.4 V/µs 0.001% 2.2 m A 1.8V to 5.5V - 40°C to 125°C ±1.5 n A Applications - - - - Thermopile amplifier Gas analysis instruments Photometric instrumentation Medical instrumentation Typical Application Thermopile Signal Amplifier LMP® is a registered trademark of National Semiconductor Corporation. © 2007 National Semiconductor Corporation .national. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are...