Part Number: LM2907-N How should estimate the current capacity of the power supply, when supplying VCC = 15 V to the "Minimum Component Tachometer Diagram" described on the first page of the data sheet?
[ 1200mW( PD Absolute Maximum Ratings…
Hello Alex,
Pin 1 the TACH+ input of the LM2907-N is the input to an analog comparator. The other input to the comparator is the TACH- input. If the 8-pin package LM2907-N is used that input is connected to the GND potential, usually 0 V. Any voltage…
Part Number: LM2907-N I am currently trying to specify the sampling rate of an external ADC measuring the voltage of the LM2907-N for a legacy design. (I understand that this is not the most efficient method of doing things, but this is the required architecture…
Hi Anthony, the LM2907-N needs a minimum supply voltage of 6V. But it's better to have a bit more. So, just try a supply voltage of +12V and look what happens. Keep the arduino unconnected for this test. You can later reduce the output voltage by the…
Part Number: LM2907-N "Two options (8-pin LM2907 and LM2917) have one input internally grounded so that an input signal must swing above and below ground and exceed the input thresholds to produce an output." is written
in the datasheet "LM2907…
Part Number: LM2907-N Hello,
I am using this frecuency to voltage converter powered to 15V.
The input is a pulsed signal from 0 to 5V. With this signal leves the converter is not working.
I have to use a signal to a low level below zero. i.e. -0.5 to…
Part Number: LM2907-N Hello,
Here is my dilemma, when applying a low signal (near ground), my output of the LM2907 is not zero and the voltage varies,
I am using the tachometer with minimum component.
My voltage supply is 12.5V
R1 = 100K
R2 = 10K
C1…
Hello Gage,
I am not sure what you mean by a "grinder" except for possibly a grinding wheel used in machine shops?
I do expect the LM2907-N perfomance to be predictable and repeatable. The LM2907-N input is an analog comparator that will respond…
Hi Isaam,
I haven’t heard back from you in a while regarding this LM2907 issue. We would like to close this thread if you no longer require assistance.
Regards, Thomas
Precision Amplifiers Applications Engineering
