Overview
The ADR391BUJZ-REEL7 is a precision 2.5 V band gap voltage reference produced by Analog Devices Inc. This component is part of the ADR39x family, known for its high precision, low power consumption, and compact footprint. The ADR391 utilizes patented temperature drift curvature correction techniques, ensuring a low temperature drift of 9 ppm/°C. This makes it ideal for applications requiring stable voltage references across a wide temperature range.
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 | ||||
| Line Regulation | ΔVO/ΔVIN | VIN = 2.8 V to 15 V, −40°C < TA < +125°C | 10 ppm/V | 25 ppm/V | ||
| Load Regulation | ΔVO/ΔILOAD | ILOAD = 0 mA to 5 mA, −40°C < TA < +125°C, VIN = 6 V | 140 ppm/mA |
Key Features
- High Precision: The ADR391 offers high precision with an initial accuracy of ±0.16% for B grade and ±0.24% for A grade.
- Low Temperature Drift: Utilizes patented temperature drift curvature correction techniques, resulting in a low temperature drift of 9 ppm/°C for B grade and 25 ppm/°C for A grade.
- Low Power Operation: Operates with low power consumption, making it suitable for battery-operated applications.
- Compact Footprint: Available in a 5-lead TSOT package, reducing board space and system cost.
- No External Capacitors Required: Advanced design eliminates the need for external capacitors, further reducing system complexity and cost.
- Wide Supply Voltage Range: Can operate with a supply voltage range from 2.8 V to 15 V.
Applications
- Battery-Operated Devices: Ideal for battery-powered systems due to its low power consumption and high precision.
- Portable Electronics: Suitable for use in portable electronics where stable voltage references are crucial.
- Industrial Control Systems: Can be used in industrial control systems requiring precise voltage references over a wide temperature range.
- Medical Devices: Applicable in medical devices where high accuracy and stability are essential.
Q & A
- What is the output voltage of the ADR391?
The output voltage of the ADR391 is 2.5 V.
- What is the temperature drift of the ADR391?
The temperature drift of the ADR391 is 9 ppm/°C for B grade and 25 ppm/°C for A grade.
- What is the supply voltage range for the ADR391?
The supply voltage range for the ADR391 is from 2.8 V to 15 V.
- Does the ADR391 require external capacitors?
No, the ADR391 does not require external capacitors due to its advanced design.
- What is the initial accuracy of the ADR391?
The initial accuracy of the ADR391 is ±0.16% for B grade and ±0.24% for A grade.
- What package type is the ADR391 available in?
The ADR391 is available in a 5-lead TSOT package.
- Is the ADR391 suitable for battery-operated devices?
Yes, the ADR391 is suitable for battery-operated devices due to its low power consumption.
- What is the load regulation of the ADR391?
The load regulation of the ADR391 is 140 ppm/mA for ILOAD = 0 mA to 5 mA, −40°C < TA < +125°C, VIN = 6 V.
- What is the line regulation of the ADR391?
The line regulation of the ADR391 is 10 ppm/V to 25 ppm/V for VIN = 2.8 V to 15 V, −40°C < TA < +125°C.
- What are some typical applications of the ADR391?
The ADR391 is typically used in battery-operated devices, portable electronics, industrial control systems, and medical devices.
