How can I amplify the 0-5mv voltage of the resistance strain gauge pressure sensor to 0-5V?
ADC0809 is a AD conversion chip, no amplification capability, ADC0809 input voltage range of 0 ~ +5V, 0-5mV input is obviously ineffective. It is suggested that the amplifier be amplified at the front of the circuit. If the requirement is not high, the operational amplifier can be used in LM358, which requires high OP284 or better operational amplifier, and the circuit structure shall be amplified in phase to phase ratio. Own on the Internet to close, a lot of information.
The amplification of the 0-5mv signal to the 0-5V requires amplification of 1000 times, and can be amplified with an operational amplifier.Since the signal itself is small, an operational amplifier with offset voltage is needed to select the operational amplifier.
This small signal high gain amplification generally requires the use of dedicated instrumentation amplifier chips, such as the AD620
