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LMP2012QML Datasheet(PDF) 10 Page - Texas Instruments |
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LMP2012QML Datasheet(HTML) 10 Page - Texas Instruments |
10 / 13 page - + LMP201X +Input -Input (0V to 5V Range) 430: LM9140-2.5 +2.5V +5V ADC1203X +VREF GND -VREF VIN +5V 1M C4 0.01 PF 1N4731A (4.3V) D1 7 2 6 4 3 Input -15V R6 10k (-0.7V) - + R1 R7, 3.9k R2 C2 3 2 6 7 4 LMP201X U1 LM6171 U2 + - R5, 1M (+2.5V) Output C5 0.01 PF +15V R4 3.9k R3 20k D2 1N4148 C3 0.01 PF +15V LMP2012QML SNOSAU5H – MARCH 2007 – REVISED APRIL 2013 www.ti.com Table 2. Composite Amplifier Measured Performance AV R1 R2 C2 BW SR en p-p Ω Ω pF MHz (V/ μs) (mVPP) 50 200 10k 8 3.3 178 37 100 100 10k 10 2.5 174 70 100 1k 100k 0.67 3.1 170 70 500 200 100k 1.75 1.4 96 250 1000 100 100k 2.2 0.98 64 400 In terms of the measured output peak-to-peak noise, the following relationship holds between output noise voltage, en p-p, for different closed-loop gain, AV, settings, where −3 dB Bandwidth is BW: Figure 7. It should be kept in mind that in order to minimize the output noise voltage for a given closed-loop gain setting, one could minimize the overall bandwidth. As can be seen from Equation 1 above, the output noise has a square-root relationship to the Bandwidth. In the case of the inverting configuration, it is also possible to increase the input impedance of the overall amplifier, by raising the value of R1, without having to increase the feed-back resistor, R2, to impractical values, by utilizing a "Tee" network as feedback. See the LMC6442 data sheet (Application Notes section) for more details on this. Figure 8. 10 Submit Documentation Feedback Copyright © 2007–2013, Texas Instruments Incorporated Product Folder Links: LMP2012QML |
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