pravin b
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How can the output of U1:B be negative? It shows about "-2V".LM324 is powered with +5V at pin 4 and 0V at pin 11.
It's not a LM324 problem. LM324 has input and output voltage range almost down to the negative rail, apparently not correctly modeled in Proteus. But the Proteus model bug is only a minor additional problem.does it mean that LM324 can not work as an instrumentation amplifier with single power supply? or do i need to modify the circuit to make it work on single power supply?
I assume you talk about the "differential" input voltage range. But we need to know the absolute voltage range.Actually the input voltage range for IN AMP will be 0-150mVolts from wheatstone bridge of a pressure sensor
First time I heared that high impedance should reduce noise. Maybe I´m missing some information..about INAPMs they gives very high impedance helping to reduce the noise in signal
It depends on your sensor impedance. --> Please tell us.However I am not sure how much impedance would be sufficient for me? Can you help me in this regard too?
How?Actually the input voltage range for IN AMP will be 0-150mVolts from wheatstone bridge of a pressure sensor.
confusing...At pins U1:a -3 and U1:b-5 , give a dc 2.5v .
check the output.
Pressure range :0-5 .8 psi (40kpa);
Product Features:
Solid, MEMS technology, high reliability
Low cost
Wide monitoring and control media
The application of a wide temperature range
Easy to use, choose from a variety of range. Easy to use, easy to install in OEM equipment
Application areas:
Automotive: tire pressure, car air pump, MAP sensor, diagnostic equipment, automotive sensors.
Industry: Air brake switch, portable pressure gauge, such as digital pressure gauge,
environmental monitoring, consumer and sports
Health care: patient monitoring and diagnostic equipment, such as blood pressure monitors,
medical instrumentation and monitoring
Range: 40kpa (differential pressure)
Output: mV signal
Electricity supply: 5VDC or constant current 1Ma
Linear accuracy: 0.25% FS
Measure the pressure range of 580 PSIG, 40KPaG
Max pressure capacity of three times the measuring range
Work power supply 5 VDC,
Input impedance of 4 - 6 KΩ
The output impedance of 4 - 6 KΩ
Operating temperature -40 - 85 ° C -40 ° F - +185 ° F
Storage Temperature -40 - 125 ° C -40 ° the F - +257 ° F
Accessible media, clean, dry, non-corrosive gases
Bias voltage ± 25 mV
Full-scale output voltage 50 - 100 mV
Bridge Resistance to 4 - 6 KΩ
Linearity ± 0.3% F.S.
Hysteresis ± 0.7% F.S.
Bias Temperature coefficient ± 0.08% of F.S. / °c
Temperature coefficient of sensitivity -0.21 % FS/ °c
https://cdn.sparkfun.com/assets/home_page_posts/1/9/0/2/Pressure_Sensor.pdf
A low pass filter capacitor across each R7 and R8 may help to reduce hgh frequency noise.
What´s your sensor frequency range of interest?
but do you need absolute accuracy?
Often sensors are calibrated with software...then it does not matter.
You can find this information million times in the internet: RC low pass filter: fc = 1 / (2 * Pi * R * C)Can you teach me how to calculate the value of the capacitance to be used?
We don´t know your application.if you could tell me that how would i know the sensor frequency range?
Use your amplifier..this one we are talking about.By the way can you tell me how can I read the sensor's differential voltage value?
connect three resistors in a string: GND --- 1k --- 20R --- 1k --- 5V (generates 49.505 mV across the unloaded 20R)how can i simulate the differential voltage?
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