Contents
Can a LM358 output come close to zero?
The LM358 output can come close to zero (5mV typical, 20mV max), but will show an error in this application where the voltage across the sense resistor is too small (30mV, which becomes 7.5mV with an opamp gain set at 0.25). So, either have a dual supply for the OA1, or feed a positive offset voltage at R3, instead of connecting it to ground.
What is the op amp range of The LM358?
LM358 is a dual op-amp IC integrated with two op-amps powered by a common power supply. It can be considered as one half of LM324 Quad op-amp which contains four op-amps with common power supply. The differential input voltage range can be equal to that of power supply voltage. What is lm358 used for?
What is the voltage gain of LM358 IC?
It has large dc voltage gain of 100dB. This IC can be operated on wide range of power supply from 3V to 32V for single power supply or from ±1.5V to ±16V for dual power supply and it also support large output voltage swing. Why lm358 is used in IR sensor?
What kind of power supply do LM358 diodes need?
For example, the LM358 series can be directly operated from the standard +5V power supply voltage which is used in digital systems and will easily provide the required interface electronics without requiring an additional ±15V power supply. Features
How to reduce the common mode error in a differential amplifier?
Equation (5) also shows that the larger Vcm, the larger the common-mode error at the differential amplifier output. Since many times we cannot do anything about the common-mode voltage level, the electronics designer can only minimize the common-mode gain to reduce the error. This can be done by matching the resistor ratios.
How is the output signal of a differential amplifier expressed?
In MasteringElectronicsDesign.com: The Differential Amplifier Common-Mode Error – Part 1 I demonstrated that the output signal of the differential amplifier can be expressed as a function of V1-V2 and V2 as shown in (3). In equation (5), the first parenthesis is the differential gain and I will note it with Gd.
Is the LM358 a rail to rail opamp?
Changed R1-R4 from 10k to 100k and I’m down to about 30-50mV! LM358 is not a rail-to-rail opamp (neither input nor output).