Product category: Analogue and Mixed Signal ICs
News Release from: National Semiconductor | Subject: LMP7731 single and LMP7732
Edited by the Electronicstalk Editorial Team on 21 September 2007
Op amps offer low noise and high
accuracy
National's LMP7731 single and LMP7732 dual precision op amps provide low input voltage noise of 2.9nV/(rt)Hz with a 1/f noise corner of only 3Hz.
National Semiconductor has released two precision operational amplifiers (op amps) that offer the industry's lowest input voltage noise and highest accuracy for products operating at low frequencies and low supply voltage Target applications include industrial and scientific weight scales, pressure sensors and other low ohmic sensor systems
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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National's LMP7731 single and LMP7732 dual precision op amps are the latest additions to the company's LMP precision amplifier family and provide low input voltage noise of 2.9nV/(rt)Hz with a 1/f noise corner of only 3Hz.
They also feature 0Hz to 10Hz peak-to-peak noise voltage of 78nVpp.
This ensures highly accurate signal conditioning, while minimising distortion in low-frequency (near DC) sensor applications.
The new LMP precision op amps are built on the company's VIP50 BiCMOS process technology.
The VIP50 process allows National to design higher-performance precision op amps, along with the most power-efficient, low-voltage amplifiers on the market.
The precision of the LMP7731 and LMP7732 amplifiers supports data acquisition systems of 16bit or greater.
In these high-resolution data acquisition systems, the designer commonly scales the output of a sensor to the full-scale input of an analogue-to-digital convertor (ADC) to ensure optimum sensitivity.
The LMP7731 single and LMP7732 dual are low-noise, low offset voltage, rail-to-rail input and output (RRIO), low-voltage precision amplifiers.
These op amps feature bipolar input stages with input bias cancellation circuitry that lowers the input current to only 1.5nA.
They provide low DC offset voltage at 40uV, support a supply voltage range of 1.8V to 5.5V and offer a wide gain bandwidth (GBW) of 22MHz while consuming 2mA of current.
This high gain bandwidth along with a high open-loop gain of 130dB enables accurate signal conditioning in systems with high closed-loop gain requirements.
The LMP7731/32 op amps offer performance exceeding 120dB for common mode rejection ratio (CMRR), power supply rejection ratio (PSRR) and large signal voltage gain (AVOL).
With an input offset voltage drift (TCVOS) of 1uV/C, these op amps are able to operate across an extended temperature range of -40C to 125C.
The LMP7731 and LMP7732 are available in five-pin SOT23 and eight-pin SOIC packages, respectively.
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