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:
See Also CD4512 8-Channel Data Selector – Datasheet | CD4543 BCD to 7-Segment Decoder – Datasheet | CD4584 Hex Schmitt Trigger – Datasheet
