AD590JH Detailed explanation of pin function specifications and circuit principle instructions（246 ）

The AD590JH is a temperature-to-current converter produced by Analog Devices, a well-known American company specializing in high-performance analog, mixed-signal, and digital signal processing ( DSP ) integrated circuits (ICs). The AD590JH is a type of temperature sensor that outputs a current that is directly proportional to the absolute temperature in Kelvin. This IC is widely used in precision temperature measurements.

Regarding the requested detailed explanation, including the pin functions, packaging, pin count, FAQ, and other specifications, here is the structure broken down for clarity:

AD590JH Pinout and Packaging Information

Package Type: The AD590JH typically comes in DIP-8 (Dual In-line Package). Pin Count: 8 pins, meaning there are 8 distinct pins in this package that must be listed with their exact functions.

Pinout Function for AD590JH (DIP-8)

Pin Number Pin Name Function Description Pin 1 Vcc Power supply input pin (positive voltage, typically +5V or +15V depending on the application). Pin 2 V- Negative supply pin or ground (GND). Pin 3 Output Output pin where the current proportional to temperature is generated (output current). Pin 4 N/C No Connection. Typically unused or tied to ground. Pin 5 N/C No Connection. Typically unused or tied to ground. Pin 6 N/C No Connection. Typically unused or tied to ground. Pin 7 N/C No Connection. Typically unused or tied to ground. Pin 8 N/C No Connection. Typically unused or tied to ground.

Circuit Principle

The AD590JH works by converting temperature into a proportional current. The output current (at Pin 3) is related to the absolute temperature (in Kelvin) of the device's environment. The current is typically in the range of microamperes and varies linearly with temperature. The device has a temperature coefficient of 1µA/K, meaning the output current increases by 1µA per Kelvin rise in temperature.

For example:

At 0°C, the output current will be around 0µA. At 25°C (298K), the output current will be 298µA. At 100°C (373K), the output current will be 373µA.

This linear relationship is useful for accurate temperature measurements, especially in scientific and industrial applications.

Pinout Function FAQs (20 Common Questions)

Here are 20 FAQs related to the AD590JH in a question-and-answer format.

Q: What is the purpose of the AD590JH? A: The AD590JH is a temperature-to-current converter that outputs a current directly proportional to the temperature in Kelvin. Q: How many pins does the AD590JH have? A: The AD590JH has 8 pins. Q: What is the output type of the AD590JH? A: The output is a current that increases with temperature, typically in microamperes. Q: What is the function of Pin 1 (Vcc) on the AD590JH? A: Pin 1 is the positive power supply input. It should be connected to a suitable positive voltage source. Q: What is the function of Pin 2 (V-) on the AD590JH? A: Pin 2 is the negative supply pin, often connected to ground (GND). Q: What happens if the AD590JH is supplied with incorrect voltages at Vcc or V-? A: Incorrect voltage supply can lead to malfunction or inaccurate output readings. Q: What does the output current from Pin 3 represent? A: The output current from Pin 3 is proportional to the absolute temperature in Kelvin. Q: What temperature range does the AD590JH cover? A: The AD590JH operates effectively within a wide temperature range, from -55°C to 150°C. Q: What is the recommended supply voltage for the AD590JH? A: The recommended supply voltage is between 4V and 30V.

Q: What is the typical output current at 25°C?

A: At 25°C, the output current is approximately 298µA (in direct proportion to the temperature in Kelvin).

Q: Can the AD590JH be used in low-power applications?

A: Yes, it is suitable for low-power applications as the current consumption is minimal.

Q: How can the AD590JH be calibrated?

A: Calibration can be done by applying known temperature standards and adjusting the output to match the expected current.

Q: What type of signal does the AD590JH output?

A: The output is a linear current signal proportional to the temperature.

Q: How accurate is the AD590JH?

A: The accuracy is typically within ±0.5°C, depending on the application and conditions.

Q: What is the power consumption of the AD590JH?

A: The power consumption is low, typically in the microampere range for the output current.

Q: Is the AD590JH suitable for use in industrial control systems?

A: Yes, it is widely used in industrial temperature sensing and control systems.

Q: How does the AD590JH respond to temperature fluctuations?

A: It provides a linear change in output current in response to temperature changes, allowing precise temperature measurements.

Q: Can the AD590JH be used for both low and high-temperature measurements?

A: Yes, it is capable of measuring temperatures across a broad range, including both low and high temperatures.

Q: What is the typical application for the AD590JH?

A: It is typically used in temperature measurement systems, industrial process controls, and scientific instruments.

Q: What is the maximum allowable temperature for the AD590JH?

A: The AD590JH can operate at temperatures up to 150°C, making it suitable for high-temperature applications.

These detailed pin descriptions, circuit principles, and FAQ provide a comprehensive understanding of the AD590JH.