OPA27 Ultra-Low Noise Precision Op-Amp

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OPA27 is an industry-standard, frequency compensated high precision operational amplifier. The IC is always available in an 8 – pin hermetically sealed dual inline IC package (DIP). OP97FP has a wide range of working conditions, a wide array of operating voltages, and is compatible with almost every TTL, CMOS, & PMOS device. The IC also offers many different features such as high input impedance and high noise immunity.

Precision Operational Amplifier

Precison amplifiers, in terms of operation are similar to normal operational amplifiers. Precision op-amps have better design specifications. They are primarily used between sensors such as strain gages, ultrasonic piezoelectric transducers, and photodetectors to capture their output signals without loading the fragile transducer output. They are also widely used in automotive industry: to monitor the myriad sensors in cars and manufacturing facilities.

For Example; a LM741 op-amp, has an offset voltage of 5mV. The offset voltage signifies the voltage that the user has to apply between the +ve and -ve of the IC, in order to get an output of 0V. On configuring the op-amp to operate at a gain of 100. The gain will not only multiply the input signal, but it will also multiply the offset voltage. This will result in the output voltage being off-value by a factor of +/-0.5V. On considering the OP177; a precision op-amp, with an offset voltage of 25uV. The same gain value of 100, would produce an error of only 2.5mV in a signal that has been amplified by a factor of 100.

OPA27 Pinout

OPA27 Pin Configuration

Pin No	Pin Name	Description
1	OFFSET TRIM 1	Offset Trim Pin 1
2	INV-INPUT	Inverting Input Pin
3	NON-INV-INPUT	Non Inverting Input Pin
4	VCC-	Negative Power Supply
5	NC	No Connection
6	OUTPUT	Output Pin
7	VCC+	Positive Power Supply
8	OFFSET TRIM 2	Offset Trim Pin 2