Overview
The AD680AN, produced by Analog Devices Inc., is a low power, low cost 2.5 V voltage reference. This bandgap voltage reference is designed to provide a fixed 2.5 V output from input voltages ranging between 4.5 V and 36 V. It is particularly notable for its very low quiescent current, which is comparable to many two-terminal references, making it ideal for power-sensitive applications such as hand-held, battery-operated equipment. The device is also suitable for use in digital-to-analog converters (DACs) and analog-to-digital converters (ADCs), offering better performance than standard on-chip references.
Key Specifications
| Parameter | AD680AN/AD680AR | AD680JN/AD680JR | AD680JT | Unit |
|---|---|---|---|---|
| Output Voltage, VO | 2.495 - 2.505 | 2.490 - 2.510 | 2.490 - 2.510 | V |
| Initial Accuracy, VOERR | -5 to +5 | -10 to +10 | -10 to +10 | mV |
| Output Voltage Drift (0°C to 70°C) | 10 - 25 | 10 - 30 | 25 | ppm/°C |
| Output Voltage Drift (-40°C to +85°C) | 20 - 25 | 25 | 25 | ppm/°C |
| Line Regulation (4.5 V ≤ +VIN ≤ 15 V) | 40 | 40 | 40 | μV/V |
| Load Regulation (0 < IOUT < 10 mA) | 80 - 100 | 80 - 100 | 80 - 100 | μV/mA |
| Quiescent Current | Typically very low, comparable to two-terminal references | Typically very low, comparable to two-terminal references | Typically very low, comparable to two-terminal references | mA |
Key Features
- Low Quiescent Current: The AD680 operates at a very low quiescent current, making it ideal for power-sensitive applications such as hand-held, battery-operated equipment.
- High Accuracy: Laser trimming of both initial accuracy and temperature coefficients results in low errors over temperature without the use of external components.
- Low Noise: The AD680 has low noise, typically 8 μV p-p from 0.1 Hz to 10 Hz and a spectral density of typically 250 nV/√Hz.
- Temperature Output Pin: The 8-lead package versions include a temperature output pin, allowing the AD680 to be configured as a temperature transducer while providing a stable 2.5 V output.
- Multiple Package Options: Available in 8-lead plastic DIP, 8-lead SOIC, and 3-pin TO-92 packages, offering flexibility in design and application.
Applications
- Digital-to-Analog Converters (DACs): The AD680 is ideal for use as a reference in DACs that require an external precision reference.
- Analog-to-Digital Converters (ADCs): It offers better performance than standard on-chip references, making it suitable for ADC applications.
- Hand-Held and Battery-Operated Equipment: The low quiescent current makes the AD680 suitable for low power applications such as hand-held, battery-operated devices.
- Temperature Measurement: The temperature output pin allows the AD680 to be used as a temperature transducer.
Q & A
- What is the output voltage of the AD680AN?
The output voltage of the AD680AN is 2.5 V, with a range of 2.495 V to 2.505 V.
- What is the operating temperature range for the AD680AN?
The AD680AN is specified for operation from -40°C to +85°C.
- What are the package options available for the AD680?
The AD680 is available in 8-lead plastic DIP, 8-lead SOIC, and 3-pin TO-92 packages.
- How does the AD680 perform in terms of noise?
The AD680 has low noise, typically 8 μV p-p from 0.1 Hz to 10 Hz and a spectral density of typically 250 nV/√Hz.
- Can the AD680 be used as a temperature transducer?
- What is the quiescent current of the AD680?
The AD680 operates at a very low quiescent current, comparable to many two-terminal references.
- Is the AD680 suitable for low power applications?
- How accurate is the AD680 in terms of output voltage?
- Can the AD680 be used in DAC and ADC applications?
- What is the line regulation of the AD680?
