Below is the parameter table and instructions for the AD594CQ, a precision temperature-to-voltage converter from Analog Devices.

AD594CQ Parameter Table

Instructions for Using AD594CQ

1. Power Supply Connection:

   • Connect the positive supply voltage (Vcc) to the Vcc pin.
   • Connect the ground (GND) to the GND pin.
   • Ensure the supply voltage is within the specified range (4.5V to 30V).

2. Temperature Measurement:

   • The AD594CQ converts temperature to a proportional output voltage.
   • At 25°C, the output voltage (Vout) is 10 mV.
   • The temperature coefficient is 10 μV/°C, meaning the output voltage increases by 10 μV for every degree Celsius increase in temperature.

3. Output Voltage Calculation:

   • To calculate the temperature (T) from the output voltage (Vout): [ T = frac{V_{text} - V_{text(25)}}{alpha} ]
   • Where:
     • ( V_{text(25)} = 10 text )
     • ( alpha = 10 text{ μV/°C} )

4. Nonlinearity and Offset Considerations:

   • The nonlinearity is ±0.1% over the temperature range from -55°C to +150°C.
   • The offset voltage can vary between -50 μV and +50 μV over the same temperature range.
   • These factors should be considered for high-precision applications.

5. Input Bias Current:

   • The input bias current is typically 0 nA but can range from -100 nA to +100 nA.
   • This current can affect the accuracy of the measurement if the sensor has a high impedance.

6. Output Impedance:

   • The output impedance is 0.5 kΩ, which should be taken into account when connecting to a load or further signal conditioning circuitry.

7. Operating and Storage Temperature:

   • The device is designed to operate over a wide temperature range (-55°C to +150°C).
   • For long-term storage, keep the device within the storage temperature range (-65°C to +175°C).

8. Handling Precautions:

   • Handle the device with care to avoid static damage.
   • Follow proper soldering techniques to ensure reliable connections and prevent thermal stress.

By following these instructions, you can effectively use the AD594CQ for precise temperature measurements in various applications.