Overview
The ADR391AUJZ-R2 is a precision 2.5V micropower, low noise voltage reference from Analog Devices Inc. This component is part of the ADR39x family, which includes the ADR391, ADR392, and ADR395 models, each offering different output voltages. The ADR391 is designed to provide high precision and low power consumption, making it ideal for battery-operated applications. It features a small footprint in a 5-lead TSOT package and utilizes patented temperature drift curvature correction techniques to achieve a low temperature drift of 9 ppm/°C.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage | VO | A grade | 2.494 | 2.5 | 2.506 | V |
| Output Voltage | VO | B grade | 2.496 | 2.5 | 2.504 | V |
| Initial Accuracy | VOERR | A grade | 6 mV | - | 0.24% | - |
| Initial Accuracy | VOERR | B grade | 4 mV | - | 0.16% | - |
| Temperature Coefficient | TCVO | A grade, −40°C < TA < +125°C | - | - | 25 ppm/°C | - |
| Temperature Coefficient | TCVO | B grade, −40°C < TA < +125°C | - | - | 9 ppm/°C | - |
| Supply Voltage Headroom | VIN − VO | - | - | - | 300 mV | |
| Input Voltage Range | VIN | - | 2.8 V | - | 15 V | |
| Supply Current | - | - | - | - | 140 µA | |
| Output Current | - | - | - | - | 5 mA | |
| Noise (0.1Hz to 10Hz) | - | - | - | - | 5 µVp-p |
Key Features
- High Precision: The ADR391 offers high precision with an initial accuracy of ±0.24% (A grade) and ±0.16% (B grade).
- Low Power Consumption: It operates with a supply current of 140 µA, making it suitable for battery-operated applications.
- Low Noise: The component features low noise, with 5 µVp-p noise in the 0.1 Hz to 10 Hz range.
- Small Footprint: Available in a 5-lead TSOT package, it minimizes board space and system cost.
- No External Capacitors Required: The advanced design eliminates the need for external capacitors, further reducing board space and system cost.
- Shutdown Feature: The ADR391 includes a shutdown feature, which can be useful in power management applications.
Applications
The ADR391 is ideally suited for various applications, including:
- Battery-Operated Devices: Its low power consumption and high precision make it a good fit for battery-operated devices.
- Portable Electronics: Suitable for use in portable electronics where space and power efficiency are critical.
- Medical Devices: Can be used in medical devices that require stable and precise voltage references.
- Industrial Automation: Applicable in industrial automation systems where reliable and precise voltage references are necessary.
Q & A
- What is the output voltage of the ADR391AUJZ-R2?
The output voltage of the ADR391AUJZ-R2 is 2.5V.
- What is the temperature coefficient of the ADR391AUJZ-R2?
The temperature coefficient is 9 ppm/°C for B grade and 25 ppm/°C for A grade.
- What is the supply voltage range for the ADR391AUJZ-R2?
The supply voltage range is from 2.8 V to 15 V.
- Does the ADR391AUJZ-R2 require external capacitors?
No, the ADR391AUJZ-R2 does not require external capacitors due to its advanced design.
- What is the maximum output current of the ADR391AUJZ-R2?
The maximum output current is 5 mA.
- What is the typical supply current of the ADR391AUJZ-R2?
The typical supply current is 140 µA.
- Is the ADR391AUJZ-R2 RoHS compliant?
- What package type is the ADR391AUJZ-R2 available in?
- What are some common applications for the ADR391AUJZ-R2?
- Does the ADR391AUJZ-R2 have a shutdown feature?
