OPA37 Ultra-Low Noise Precision Op-Amp – Datasheet

OPA37 is an ultra-low noise, high-precision monolithic operational amplifier. A unique bias current cancellation circuit allows bias and offsets current specifications to be met over the full –40°C to +85°C temperature range. OPA37 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

Precision amplifiers are op-amps with better design specifications in terms of precision offset, zero-drift over time, lower internal noise, and input bias current. These op-amps are used in analog filters where they do not distort or DC offset the signal of interest. Their functionality and mode of use are somewhat similar to conventional op-amps; but, the output is precise, accurate, and virtually free of any kind of noise.

For Example; an 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.

OPA37 Pinout

OPA37 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

OPA37 Features

• LOW NOISE: 4.5nV/√Hz max at 1kHz
• LOW OFFSET: 100µV max
• HIGH OPEN-LOOP GAIN: 117dB min
• LOW DRIFT: 0.4µV/°C
• HIGH COMMON-MODE REJECTION: 100dB min
• HIGH POWER-SUPPLY REJECTION: 94dB min

Application

• PRECISION INSTRUMENTATION
• DATA ACQUISITION
• TEST EQUIPMENT
• PROFESSIONAL AUDIO EQUIPMENT
• TRANSDUCER AMPLIFIERS
• RADIATION HARD EQUIPMENT

OPA37 Datasheet

You can download this datasheet for OPA37 Ultra-Low Noise Precision Op-Amp from the link given below:

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