Overview
The AD680ARZ, produced by Analog Devices Inc., is a bandgap voltage reference IC that provides a stable 2.5 V output from input voltages ranging between 4.5 V and 36 V. This device is designed to operate at a very low quiescent current, making it ideal for low power applications such as hand-held, battery-operated equipment. The AD680ARZ is part of the AD680 series, which is known for its high accuracy, low noise, and excellent dc characteristics, making it suitable for use as a reference in digital-to-analog converters (DACs) and analog-to-digital converters (ADCs) that require external precision references.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 2.495 | 2.500 | 2.505 | V |
| Initial Accuracy (VOERR) | -5 | - | +5 | mV |
| Temperature Coefficient | - | - | 20 | ppm/°C |
| Line Regulation (4.5 V ≤ +VIN ≤ 15 V) | - | - | 40 | μV/V |
| Load Regulation (0 < IOUT < 10 mA) | - | - | 100 | μV/mA |
| Quiescent Current | - | - | 250 | μA |
| Operating Temperature Range | -40 | - | +85 | °C |
| Package Type | - | - | 8-Lead SOIC | - |
Key Features
- High Accuracy: The AD680ARZ offers high accuracy with an initial accuracy of ±5 mV and a temperature coefficient of 20 ppm/°C, ensuring low errors over temperature.
- Low Quiescent Current: Operates at a very low quiescent current of 250 μA max, making it ideal for low power applications.
- Low Noise: Features low noise performance with a typical noise of 8 μV p-p from 0.1 Hz to 10 Hz and a spectral density of 250 nV/√Hz.
- Temperature Output Pin: The 8-lead package versions include a temperature output pin that provides an output voltage varying linearly with temperature, allowing it to be used as a temperature transducer.
- Multiple Package Options: Available in 8-lead PDIP, 8-lead SOIC, and 3-pin TO-92 packages.
Applications
- Digital-to-Analog Converters (DACs): Ideal for use as an external precision reference in DACs that require high accuracy.
- Analog-to-Digital Converters (ADCs): Offers better performance than standard on-chip references in ADCs.
- Low Power Applications: Suitable for hand-held, battery-operated equipment due to its low quiescent current.
- Temperature Measurement: Can be configured as a temperature transducer while providing a stable 2.5 V output.
Q & A
- What is the output voltage of the AD680ARZ?
The output voltage of the AD680ARZ is 2.5 V with an initial accuracy of ±5 mV.
- What is the operating temperature range of the AD680ARZ?
The AD680ARZ operates from -40°C to +85°C.
- What is the quiescent current of the AD680ARZ?
The quiescent current of the AD680ARZ is 250 μA max.
- What are the package options for the AD680ARZ?
The AD680ARZ is available in an 8-lead SOIC package, among other options like 8-lead PDIP and 3-pin TO-92.
- What are the typical noise specifications of the AD680ARZ?
The AD680ARZ has a typical noise of 8 μV p-p from 0.1 Hz to 10 Hz and a spectral density of 250 nV/√Hz.
- Can the AD680ARZ be used as a temperature transducer?
Yes, the AD680ARZ can be configured as a temperature transducer while providing a stable 2.5 V output, especially in the 8-lead package versions.
- What is the line regulation of the AD680ARZ?
The line regulation of the AD680ARZ is 40 μV/V over the input voltage range of 4.5 V to 36 V.
- What are the load regulation specifications of the AD680ARZ?
The load regulation of the AD680ARZ is 100 μV/mA for output currents between 0 and 10 mA.
- Is the AD680ARZ suitable for low power applications?
Yes, the AD680ARZ is highly suitable for low power applications due to its low quiescent current.
- What types of converters can the AD680ARZ be used with?
The AD680ARZ can be used with digital-to-analog converters (DACs) and analog-to-digital converters (ADCs) that require external precision references.
