The part number " OPA340NA/3K " refers to a specific operational amplifier (op-amp) manufactured by Texas Instruments (TI). It's part of the OPA34x family of precision, low- Power op-amps.
Pinout and Function Specifications
The OPA340 is a single op-amp with a small package and typically comes in an 8-pin package, like an SOIC-8. Here's the detailed explanation of the pin functions, specifications, and circuit instructions for the OPA340NA:
Package Type:
Package Type: SOIC-8 (Small Outline Integrated Circuit), which typically has 8 pins.Pin Function List (8-Pin SOIC Package):
Pin Pin Name Description 1 Output This is the output pin of the op-amp. The voltage at this pin is the result of the amplification process applied to the input signals. 2 Inverting Input The inverting input (-) pin is where the signal is applied with a negative polarity. This pin is crucial for feedback and signal processing. 3 Non-inverting Input The non-inverting input (+) pin is where the signal is applied with positive polarity. The voltage at this pin controls the amplification characteristics. 4 V− (Negative Power Supply) This is the negative voltage supply pin for the op-amp, typically connected to ground or a negative voltage source. 5 NC (No Connect) This pin is not internally connected to anything and can be left floating or unused. It doesn't affect the circuit. 6 Output (Feedback) This pin is sometimes connected in feedback loop circuits to control the amplification behavior. 7 V+ (Positive Power Supply) This is the positive voltage supply pin for the op-amp, which powers the internal circuitry. 8 NC (No Connect) Another pin that is not internally connected, just like pin 5.Circuit Principle Instructions
The OPA340 is a low-power, precision op-amp designed for single-supply and dual-supply operation. It is designed for use in various precision signal processing and conditioning applications.
Power Supply Connections: Pin 7 is connected to the positive supply (typically +3V to +40V for single-supply applications). Pin 4 is connected to the negative supply (typically ground in single-supply or negative supply voltage in dual-supply applications). Input Signals: The signal is input into either the inverting or non-inverting pins, depending on the configuration. The output will then be the amplified signal. The inverting input (pin 2) is used for negative feedback applications, while the non-inverting input (pin 3) is used for positive feedback or direct signal input. Output Signal: The output (pin 1) provides the amplified version of the input signal based on the configuration of the circuit (inverting, non-inverting, differential, etc.). Grounding: The op-amp should be properly grounded for accurate operation, especially when configured in a single-supply mode.FAQ (Frequently Asked Questions)
Q1: What is the supply voltage range for the OPA340NA?
A1: The OPA340NA operates with a supply voltage range from +3V to +40V in single-supply configuration and ±1.5V to ±20V in dual-supply configuration.Q2: What is the input voltage range for the OPA340NA?
A2: The input voltage range for the OPA340NA is typically between V− + 0.5V to V+ - 0.5V, ensuring the input signal stays within the supply limits.Q3: What is the typical output voltage swing for OPA340NA?
A3: The output voltage swing is typically within 0.01V to V+ - 0.01V for a 10kΩ load, depending on the supply voltage.Q4: Can the OPA340NA be used in a single-supply configuration?
A4: Yes, the OPA340NA is designed for single-supply applications and can operate with a positive voltage supply and ground (V− connected to ground).Q5: How much power does the OPA340NA consume?
A5: The OPA340NA typically consumes only 30µA of current, making it ideal for low-power applications.Q6: Can the OPA340NA be used in high-speed applications?
A6: No, the OPA340NA is not intended for high-speed applications, as it has a typical gain-bandwidth product of 1 MHz.Q7: What is the input offset voltage of the OPA340NA?
A7: The typical input offset voltage for the OPA340NA is 10mV, with a maximum value of 50mV.Q8: What is the typical open-loop gain of the OPA340NA?
A8: The OPA340NA typically has an open-loop gain of 100,000, which can vary based on operating conditions.Q9: What is the common-mode rejection ratio (CMRR) for the OPA340NA?
A9: The CMRR is typically 100dB, indicating good rejection of common-mode signals.Q10: What is the output drive capability of the OPA340NA?
A10: The OPA340NA can typically drive a load of 10kΩ to ground with a low distortion output.Q11: Is the OPA340NA internally compensated?
A11: Yes, the OPA340NA is internally compensated for stable operation without requiring external components for compensation.Q12: How does the OPA340NA behave at low temperatures?
A12: The OPA340NA has a typical operating temperature range from -40°C to +125°C, making it suitable for automotive and industrial applications.Q13: Can the OPA340NA be used in high-voltage circuits?
A13: No, the OPA340NA is not designed for high-voltage applications; it is intended for low-voltage, precision circuits.Q14: What is the noise performance of the OPA340NA?
A14: The OPA340NA has a low input noise density of approximately 10nV/√Hz at 1kHz, making it suitable for low-noise applications.Q15: Can the OPA340NA be used in filter circuits?
A15: Yes, the OPA340NA can be used in active filter circuits due to its low power consumption and stable performance.Q16: What is the power supply rejection ratio (PSRR) of the OPA340NA?
A16: The PSRR of the OPA340NA is typically 80dB, which means it rejects fluctuations in the power supply voltage well.Q17: What kind of packaging options are available for the OPA340NA?
A17: The OPA340NA is commonly available in an 8-pin SOIC-8 package.Q18: How should I design the feedback network for the OPA340NA?
A18: The feedback network should be designed based on the desired gain, with resistors or capacitor s to set the closed-loop gain.Q19: Can I use the OPA340NA in a differential amplifier configuration?
A19: Yes, the OPA340NA can be used in differential amplifier configurations, utilizing both the inverting and non-inverting inputs.Q20: Is the OPA340NA suitable for automotive applications?
A20: Yes, the OPA340NA is rated for use in automotive applications, with its extended temperature range and low power consumption.This concludes the pinout explanation, circuit details, and FAQ section for the OPA340NA operational amplifier.
