OPA1612AIDR Detailed explanation of pin function specifications and circuit principle instructions

The "OPA1612AIDR" is a precision operational amplifier (op-amp) model produced by Texas Instruments (TI). This specific model is part of the OPA1612 series of op-amps, which are high-performance, low-noise, and low-distortion components designed for high-fidelity audio and precision analog signal processing applications.

Below is a detailed explanation of the pin functions, specifications, and a complete list of the pins and their functions for the OPA1612AIDR.

OPA1612AIDR Overview

Brand: Texas Instruments (TI) Model: OPA1612AIDR Package Type: SOIC-8 (Small Outline Integrated Circuit) with 8 pins. Function: Precision Operational Amplifier Key Features: Low noise: 1.1nV/√Hz at 1kHz High output drive capability High Common-Mode Rejection Ratio (CMRR) Low Total Harmonic Distortion (THD+N)

Pinout and Detailed Pin Function

The OPA1612AIDR is an 8-pin SOIC-8 package. Below is a detailed list of each pin function:

Pin Number Pin Name Pin Function Description 1 V− (Negative Voltage Supply) Negative power supply input pin. Typically connected to ground or a negative voltage source. 2 Output (OUT) Output pin for the op-amp. The amplified signal is available here. 3 Inverting Input (IN−) Inverting input for the operational amplifier. The input signal is applied to this pin with respect to ground. 4 Non-inverting Input (IN+) Non-inverting input for the operational amplifier. The input signal is applied to this pin, and the signal will be amplified with positive polarity. 5 V+ (Positive Voltage Supply) Positive power supply input pin. Typically connected to a positive voltage source. 6 NC (No Connection) No connection pin. This pin is internally unconnected and can be left floating or tied to ground. 7 NC (No Connection) Another no connection pin. Similar to Pin 6, it is internally unconnected. 8 Output (OUT) Another output pin for the op-amp. Often used in configurations requiring dual outputs, or redundancy.

Functionality of Each Pin

Pin 1 (V−): This is the negative power supply pin, and its voltage determines the lower operating limit of the amplifier's input and output signal range. It is typically tied to ground or a negative voltage source.

Pin 2 (Output): This is the output pin where the amplified signal from the op-amp is available. In most configurations, the output signal is taken here.

Pin 3 (Inverting Input, IN−): The inverting input is the terminal where the input signal is fed into the op-amp in an inverting configuration. The voltage at this pin is inverted relative to the voltage at the non-inverting input.

Pin 4 (Non-inverting Input, IN+): This is the non-inverting input pin. When a signal is fed into this pin, the output voltage will have the same polarity as the input signal.

Pin 5 (V+): This is the positive power supply pin, and its voltage sets the upper operating limit for the amplifier's input and output signal ranges. It is typically tied to a positive voltage source.

Pin 6 (NC): This pin is not internally connected to any circuit element in the op-amp, and it can be left unconnected or tied to ground. It does not impact the functionality of the op-amp.

Pin 7 (NC): Like Pin 6, this pin is not used and can be left unconnected or grounded.

Pin 8 (Output): This pin is another output, providing a mirrored or secondary output of the op-amp, and can be used in some configurations for dual output needs.

Circuit Principle

The OPA1612AIDR is typically used in configurations such as inverting, non-inverting, differential amplifiers, or buffer stages. The op-amp amplifies the difference between the voltage at the non-inverting and inverting inputs (Pin 4 and Pin 3, respectively) and produces an output signal at Pin 2 or Pin 8. The power supply pins (Pin 1 and Pin 5) set the voltage rails for the amplifier’s operation. Proper decoupling capacitor s are recommended between these supply pins and ground to reduce noise and power supply ripple. The device can be used in precision analog circuits requiring high signal integrity, such as audio amplification, signal conditioning, and instrumentation.

20 FAQ Regarding OPA1612AIDR

What is the operating voltage range for the OPA1612AIDR? The OPA1612AIDR operates within a voltage range of ±2.25V to ±18V (or 4.5V to 36V single supply). What is the output impedance of the OPA1612AIDR? The output impedance is typically very low, in the order of a few ohms, making it suitable for driving loads directly. What is the typical offset voltage of the OPA1612AIDR? The typical input offset voltage is 25µV, which is very low and ideal for high-precision applications. What is the bandwidth of the OPA1612AIDR? The typical bandwidth is 8MHz at a gain of 1, and it increases with higher gain. Can the OPA1612AIDR be used in audio applications? Yes, the OPA1612AIDR is specifically designed for high-performance audio applications, with low noise and high linearity. What is the maximum output current of the OPA1612AIDR? The maximum output current is typically ±20mA, which can drive moderate loads. Is the OPA1612AIDR internally compensated? Yes, it is internally compensated for unity gain stability. What is the common-mode rejection ratio (CMRR) for the OPA1612AIDR? The typical CMRR is 120dB, which ensures that the op-amp effectively rejects common-mode signals. How should the power supply pins (V+ and V−) be connected? V+ should be connected to the positive voltage supply, and V− should be connected to the negative supply (or ground in single-supply configurations).

Can the OPA1612AIDR operate in a single-supply configuration?

Yes, the OPA1612AIDR can operate in a single-supply configuration by tying V− to ground and applying a positive voltage to V+.

What is the typical input bias current for the OPA1612AIDR?

The typical input bias current is 1nA, which is very low and ensures minimal distortion in precision circuits.

What is the input voltage range for the OPA1612AIDR?

The input voltage range extends from V− + 0.3V to V+ − 0.3V, meaning the input voltage must stay within these limits.

Can the OPA1612AIDR be used in low-power designs?

Yes, it has low quiescent current (1.8mA) making it suitable for low-power applications.

What is the total harmonic distortion (THD+N) of the OPA1612AIDR?

The typical THD+N is 0.00003%, making it highly suitable for high-fidelity audio applications.

Can the OPA1612AIDR be used for differential measurements?

Yes, in differential amplifier configurations, the OPA1612AIDR can accurately measure differences between two input signals.

What is the maximum output swing of the OPA1612AIDR?

The output can swing close to the supply rails, typically within 1V of the supply in most conditions.

How should the unused pins (NC) be handled?

The unused NC pins should be left unconnected, as they are not part of the internal circuitry.

Is the OPA1612AIDR available in other package types?

Yes, the OPA1612 is also available in other packages such as the MSOP-8.

What is the thermal shutdown protection for the OPA1612AIDR?

The device includes thermal overload protection, preventing damage under excessive temperature conditions.

Can the OPA1612AIDR be used in instrumentation amplifiers?

Yes, with the right external resistors, the OPA1612AIDR can be used to build a highly accurate instrumentation amplifier.

Conclusion

The OPA1612AIDR is a versatile, high-performance op-amp with excellent precision, low noise, and low distortion, ideal for audio and precision applications. The detailed pin function and FAQ guide should provide clarity on its usage and applications.