Overview
The REF02HQ, produced by Analog Devices Inc., is a precision 5V voltage reference device. It is part of the REF01/REF02/REF03 series, known for their high output accuracy and excellent temperature stability. The REF02HQ is designed to provide a stable 5V output voltage, making it suitable for a wide range of applications where precise voltage referencing is crucial.
Key Specifications
| Parameter | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Output Voltage (VO) | IL = 0 mA | 4.975 | 5.000 | 5.025 | V |
| Output Adjustment Range (ΔVTRIM) | POT = 10 kΩ | ±3.0 | ±6.0 | % | |
| Initial Accuracy (VOERR) | ±25 mV | ±0.5% | |||
| Temperature Coefficient (TCVO) | −55°C ≤ TA ≤ +125°C | 3 | 8.5 ppm/°C | ||
| Input Voltage Range (VIN) | 7.0 | 36 | V | ||
| Quiescent Supply Current (IQ) | No Load | 0.65 | 1.4 | mA | |
| Load Current (IOUT) | Sink Current | −0.3 | 20 | mA | |
| Short-Circuit Current (ISC) | VO = 0 V | 25 | mA | ||
| Operating Temperature Range | −55 | 125 | °C |
Key Features
- High Output Accuracy: The REF02HQ offers an output voltage accuracy of ±0.3% maximum, ensuring reliable performance in precision applications.
- Excellent Temperature Stability: With a temperature coefficient of 8.5 ppm/°C maximum, the device maintains its output voltage stability over a wide temperature range.
- Adjustable Output: The output voltage can be adjusted over a ±6% range using an external trim potentiometer, allowing for fine-tuning of the output voltage.
- Low Noise: The device features low noise characteristics, with a peak-to-peak noise of 10 µVPP maximum in the 0.1 Hz to 10 Hz frequency range.
- Low Power Consumption: The REF02HQ operates with a quiescent supply current of 1.4 mA maximum, making it suitable for low-power applications.
- Wide Supply Range: The device can operate with an input voltage range of 7.0 V to 36 V, providing flexibility in various system designs.
- Temperature Output Pin: The REF02HQ includes a temperature output pin that can be used for temperature sensing and approximation with an external buffer and resistor network.
Applications
- Analog-to-Digital (A/D) and Digital-to-Analog (D/A) Converters: The REF02HQ is ideal for providing stable reference voltages in A/D and D/A conversion applications.
- Portable Instrumentation: Its low power consumption and high accuracy make it suitable for portable instrumentation devices.
- Temperature Transducers: The device can be used in temperature transducer applications due to its temperature output pin and stable voltage reference.
- Digital Voltmeters: The REF02HQ is used in digital voltmeters where precise voltage referencing is essential.
- Precision Regulators and Constant Current Sources: It is also used in precision regulators and constant current sources due to its stable output voltage and low drift characteristics.
Q & A
- What is the output voltage of the REF02HQ?
The output voltage of the REF02HQ is 5.0 V with an accuracy of ±0.3% maximum.
- What is the temperature coefficient of the REF02HQ?
The temperature coefficient of the REF02HQ is 8.5 ppm/°C maximum.
- Can the output voltage of the REF02HQ be adjusted?
- What is the input voltage range of the REF02HQ?
The input voltage range of the REF02HQ is from 7.0 V to 36 V.
- What is the quiescent supply current of the REF02HQ?
The quiescent supply current of the REF02HQ is 1.4 mA maximum.
- Does the REF02HQ have a temperature output pin?
- What are some common applications of the REF02HQ?
- What are the available package options for the REF02HQ?
- Is the REF02HQ suitable for high-stress applications?
- Are there newer alternatives to the REF02HQ?
