INA194AIDBVR Detailed explanation of pin function specifications and circuit principle instructions
The INA194AIDBVR is a current sense amplifier manufactured by Texas Instruments (TI). This IC is designed to provide accurate current sensing in a variety of applications. The following information is a detailed explanation of the INA194AIDBVR specifications, pin functions, packaging, and other details related to the IC.
Packaging and Pinout:
Package Type: The INA194AIDBVR is housed in a VSSOP-8 (Very Thin Shrink Small Outline Package) package, which contains 8 pins. Total Number of Pins: 8 pins.Pin Function Specifications:
Here’s the detailed explanation of each pin function for the INA194AIDBVR in VSSOP-8 package format:
Pin Number Pin Name Pin Function Description 1 V+ This pin is the positive power supply input. It is typically connected to a positive voltage rail that powers the INA194AIDBVR. The voltage range is typically from 2.7V to 5.5V. 2 IN- This is the negative input for the current sense amplifier. It is connected to the negative side of the current sensing resistor. The voltage at this pin is compared to the voltage at IN+. 3 IN+ This is the positive input for the current sense amplifier. It is connected to the positive side of the current sensing resistor. The voltage difference between IN+ and IN- is used to calculate the current. 4 GND This is the ground pin. It is connected to the system ground and serves as the reference for the internal circuitry. 5 OUT This is the output pin. It provides the amplified voltage corresponding to the current sensed between IN+ and IN-. This voltage can be read by the microcontroller or other systems for monitoring current. 6 V- This pin is the negative power supply input. In a single-supply configuration, this pin is connected to the system ground (GND). In dual-supply configurations, it is connected to the negative voltage rail. 7 NC No connection. This pin is not internally connected to any circuitry and can be left floating or grounded depending on the application. 8 NC No connection. Like pin 7, this pin is not internally connected and can be left floating or grounded.Package Type:
VSSOP-8 (Very Thin Shrink Small Outline Package), 8 pins.Circuit Principle:
The INA194AIDBVR uses a differential amplifier configuration to sense the voltage drop across an external shunt resistor placed in series with the load. The voltage difference between the input pins (IN+ and IN-) is proportional to the current flowing through the shunt resistor, and this voltage is amplified by the internal circuitry to provide an output voltage that can be read by a microcontroller or ADC. The gain of the device is typically set by an external resistor connected to the gain setting pin, which adjusts the output voltage range for various current levels.
20 Frequently Asked Questions (FAQ):
1. What is the typical operating voltage range for the INA194AIDBVR? The INA194AIDBVR operates with a voltage range of 2.7V to 5.5V for the V+ pin and ground for the V- pin. 2. What is the function of the IN+ pin on the INA194AIDBVR? The IN+ pin is the positive input for the current sense amplifier. It is connected to the positive side of the shunt resistor, and the voltage at this pin is compared to the IN- pin to sense the current. 3. How does the INA194AIDBVR calculate current? The INA194AIDBVR calculates current by measuring the voltage difference between the IN+ and IN- pins, which is proportional to the current flowing through the external shunt resistor. 4. What is the function of the OUT pin? The OUT pin provides the amplified voltage that corresponds to the current being sensed. This voltage is proportional to the voltage difference between IN+ and IN- and can be used for further processing by a microcontroller or ADC. 5. What is the recommended external resistor for setting the gain of the INA194AIDBVR? The gain of the INA194AIDBVR can be set by selecting an appropriate resistor to connect between the gain pin and the ground. The value of this resistor determines the amplification factor of the voltage difference between the IN+ and IN- pins. 6. What is the maximum input voltage that the INA194AIDBVR can tolerate at the IN+ and IN- pins? The maximum input voltage at the IN+ and IN- pins is typically limited to the supply voltage (V+) or ground (V-), with a maximum tolerance of ±40V beyond which damage to the IC may occur. 7. Can the INA194AIDBVR work with a dual power supply? Yes, the INA194AIDBVR can operate with a dual power supply, where the V+ pin is connected to a positive voltage supply, and the V- pin is connected to a negative voltage supply. 8. What is the output voltage range of the INA194AIDBVR? The output voltage (OUT pin) corresponds to the amplified sense voltage and typically ranges from 0V to V+, depending on the current being measured and the gain setting. 9. How do I calculate the current range using the INA194AIDBVR? The current range can be calculated by determining the voltage difference between IN+ and IN- and applying the gain factor set by the external resistor. The output voltage at OUT will give the proportional value of the current. 10. What are the typical applications for the INA194AIDBVR? The INA194AIDBVR is typically used in applications such as battery management, power supply monitoring, motor current sensing, and other systems that require accurate current measurement. 11. What is the maximum common-mode voltage for the INA194AIDBVR? The maximum common-mode voltage for the INA194AIDBVR is 26V (from IN+ to IN-), which means the difference between IN+ and IN- cannot exceed this value. 12. What is the internal gain of the INA194AIDBVR? The internal gain of the INA194AIDBVR is typically set to 50V/V, but this can be adjusted by changing the external resistor that controls the gain. 13. What is the typical current consumption of the INA194AIDBVR? The typical supply current for the INA194AIDBVR is approximately 200µA. 14. Can the INA194AIDBVR be used for high-side current sensing? Yes, the INA194AIDBVR can be used for high-side current sensing by placing the shunt resistor between the power supply and the load. 15. How accurate is the current measurement of the INA194AIDBVR? The INA194AIDBVR provides high accuracy with typical offset voltage of ±50µV and a gain error of ±0.2%. 16. What is the temperature coefficient of the INA194AIDBVR? The typical temperature coefficient for the INA194AIDBVR is 50ppm/°C, which indicates how the device's performance changes with temperature. 17. Can the INA194AIDBVR be used for low-voltage operation? Yes, the INA194AIDBVR can operate with a voltage as low as 2.7V, making it suitable for low-voltage systems. 18. What is the maximum output impedance of the INA194AIDBVR? The output impedance of the INA194AIDBVR is typically 50Ω. 19. How do I connect the INA194AIDBVR to a microcontroller? The output pin (OUT) can be connected to an ADC or GPIO pin of a microcontroller for reading the current value. The IN+ and IN- pins should be connected to the current sensing resistor in the circuit. 20. What are the key features of the INA194AIDBVR? The key features include low offset voltage, high accuracy, low current consumption, a wide supply voltage range (2.7V to 5.5V), and the ability to sense current on both high and low sides.This detailed explanation covers the pinout, packaging, and specifications for the INA194AIDBVR. If you need further elaboration or additional information, feel free to ask!
