Overview
The ADR445ARMZ-REEL7 is a part of the ADR440/ADR441/ADR443/ADR444/ADR445 series of XFET® voltage references produced by Analog Devices Inc. This component is known for its ultralow noise, high accuracy, and low temperature drift performance. Utilizing Analog Devices' patented temperature drift curvature correction and XFET technology, the ADR445 minimizes voltage change vs. temperature nonlinearity, making it ideal for precision signal conversion applications.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage | VOUT | A Grade | 4.990 | 5.000 | 5.010 | V |
| Output Voltage | VOUT | B Grade | 4.998 | 5.000 | 5.002 | V |
| Initial Accuracy | VOERR | A Grade | ±6 mV | mV | ||
| Initial Accuracy | VOERR | B Grade | ±2 mV | mV | ||
| Temperature Drift | TCVOUT | A Grade, −40°C < TA < +125°C | 10 | ppm/°C | ||
| Temperature Drift | TCVOUT | B Grade, −40°C < TA < +125°C | 3 | ppm/°C | ||
| Line Regulation | ΔVOUT/ΔVIN | −40°C < TA < +125°C | 10 | 20 | ppm/V | |
| Load Regulation | ΔVOUT/ΔILOAD | ILOAD = 0 mA to 10 mA, VIN = 4 V, −40°C < TA < +125°C | −50 | 50 | ppm/mA | |
| Supply Voltage Operating Range | VIN | 5.5 | 18 | V | ||
| Supply Voltage Headroom | VIN − VOUT | 500 mV | mV | |||
| Output Current Source/Sink | −5 mA to 10 mA | mA | ||||
| Operating Temperature Range | TA | −40°C | +125°C | °C |
Key Features
- Ultralow Noise: The ADR445 offers superior noise performance compared to buried Zener references, making it suitable for high-precision applications.
- High Accuracy and Low Temperature Drift: Utilizes patented temperature drift curvature correction and XFET technology to minimize voltage change vs. temperature nonlinearity.
- Low Supply Voltage Headroom: Operates with a supply voltage headroom of 500 mV, enhancing its versatility in various applications.
- Current Source and Sink Capability: Can source up to 10 mA and sink up to −5 mA of output current.
- Trim Terminal: Allows adjustment of the output voltage over a 0.5% range without compromising performance.
- Packaging Options: Available in 8-lead MSOP and narrow SOIC packages.
- Extended Industrial Temperature Range: Specified over the temperature range of −40°C to +125°C.
Applications
- Precision Signal Conversion: Ideal for high-end data acquisition systems, optical networks, and medical applications where precision and low noise are critical.
- High-End Data Acquisition Systems: Suitable for applications requiring high accuracy and low noise in signal conversion.
- Optical Networks: Used in optical communication systems where stable and accurate voltage references are essential.
- Medical Applications: Applicable in medical devices that require precise and reliable voltage references.
Q & A
- What is the output voltage of the ADR445?
The output voltage of the ADR445 is 5.0V, with initial accuracy of ±6 mV for the A grade and ±2 mV for the B grade.
- What is the temperature drift of the ADR445?
The temperature drift of the ADR445 is 10 ppm/°C for the A grade and 3 ppm/°C for the B grade over the temperature range of −40°C to +125°C.
- What is the supply voltage headroom required for the ADR445?
The ADR445 operates with a supply voltage headroom of 500 mV.
- Can the ADR445 source and sink current?
Yes, the ADR445 can source up to 10 mA and sink up to −5 mA of output current.
- What are the packaging options for the ADR445?
The ADR445 is available in 8-lead MSOP and narrow SOIC packages.
- What is the operating temperature range of the ADR445?
The operating temperature range of the ADR445 is −40°C to +125°C.
- How does the ADR445 adjust its output voltage?
The ADR445 has a trim terminal that allows adjustment of the output voltage over a 0.5% range without compromising performance.
- What are the typical applications of the ADR445?
The ADR445 is typically used in high-end data acquisition systems, optical networks, and medical applications.
- Does the ADR445 support defense and aerospace applications?
While the ADR445 itself does not have specific defense and aerospace grades, other models in the series like the ADR441-EP do support such applications.
- What is the ripple rejection ratio of the ADR445?
The ripple rejection ratio of the ADR445 is −80 dB at 1 kHz.
