Overview
The ADR445ARZ is a part of the ADR440/ADR441/ADR443/ADR444/ADR445 series, a family of XFET voltage references developed by Analog Devices Inc. These voltage references are distinguished by their ultralow noise, high accuracy, and low temperature drift performance. Utilizing Analog Devices' patented temperature drift curvature correction and XFET (eXtra implanted junction FET) technology, these devices minimize voltage change vs. temperature nonlinearity, making them ideal for precision signal conversion applications.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage | VOUT | A Grade, VIN = 5.5 V to 18 V, TA = 25°C | 4.994 | 5.000 | 5.006 | V |
| B Grade, VIN = 5.5 V to 18 V, TA = 25°C | 4.998 | 5.000 | 5.002 | V | ||
| Initial Accuracy | VOERR | A Grade | ±6 mV | mV | ||
| B Grade | ±2 mV | mV | ||||
| Temperature Drift | TCVOUT | A Grade, −40°C < TA < +125°C | 2 | 10 | ppm/°C | |
| B Grade, −40°C < TA < +125°C | 3 | ppm/°C | ||||
| Output Voltage Hysteresis | VOUT_HYS | 70 | ppm | |||
| Ripple Rejection Ratio | RRR | fIN = 1 kHz | −80 | dB | ||
| Supply Voltage Operating Range | VIN | 5.5 | 18 | V | ||
| Supply Voltage Headroom | VIN − VOUT | 500 | mV | |||
| Output Current Source/Sink | −5 mA to 10 mA | mA |
Key Features
- Ultralow noise and high accuracy voltage reference.
- Low temperature drift performance using patented temperature drift curvature correction and XFET technology.
- Operates with low supply voltage headroom (500 mV).
- Capable of sourcing up to 10 mA and sinking up to −5 mA of output current.
- Includes a trim terminal to adjust the output voltage over a 0.5% range without compromising performance.
- Available in 8-lead MSOP and narrow SOIC packages.
- Specified over the extended industrial temperature range of −40°C to +125°C.
Applications
The ADR445ARZ is ideally suited for precision signal conversion applications in various fields, including:
- High-end data acquisition systems.
- Optical networks.
- Medical applications.
Q & A
- What is the output voltage of the ADR445ARZ?
The output voltage of the ADR445ARZ is 5.0V, with an initial accuracy of ±6 mV for the A grade and ±2 mV for the B grade. - What is the temperature drift of the ADR445ARZ?
The temperature drift of the ADR445ARZ is 2 to 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 operating range of the ADR445ARZ?
The supply voltage operating range is from 5.5 V to 18 V. - What is the ripple rejection ratio of the ADR445ARZ?
The ripple rejection ratio is −80 dB at 1 kHz. - What are the available packages for the ADR445ARZ?
The ADR445ARZ is available in 8-lead MSOP and narrow SOIC packages. - What is the maximum output current that the ADR445ARZ can source or sink?
The ADR445ARZ can source up to 10 mA and sink up to −5 mA of output current. - Can the output voltage of the ADR445ARZ be adjusted?
Yes, the output voltage can be adjusted over a 0.5% range using the trim terminal without compromising performance. - What are the typical applications of the ADR445ARZ?
The ADR445ARZ is typically used in high-end data acquisition systems, optical networks, and medical applications. - What is the operating temperature range of the ADR445ARZ?
The operating temperature range is from −40°C to +125°C. - What is the significance of XFET technology in the ADR445ARZ?
The XFET technology minimizes voltage change vs. temperature nonlinearity and offers better noise performance than buried Zener references.
