Overview
The ADR444ARMZ 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 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 | 4.091 | 4.096 | 4.101 | V |
| B Grade | 4.0944 | 4.096 | 4.0976 | V | ||
| Initial Accuracy | VOERR | A Grade | ±5 mV | 0.13 % | ||
| B Grade | ±1.6 mV | 0.04 % | ||||
| Temperature Drift | TCVOUT | A Grade, −40°C < TA < +125°C | 2 | 10 ppm/°C | ||
| B Grade, −40°C < TA < +125°C | 1 | 3 ppm/°C | ||||
| Line Regulation | ΔVOUT/ΔVIN | −40°C < TA < +125°C | 10 | 20 ppm/V | ||
| Load Regulation | ||||||
| Output Voltage Hysteresis | VOUT_HYS | 70 ppm | ||||
| Ripple Rejection Ratio | RRR | fIN = 1 kHz | −80 dB | |||
| Short Circuit to GND | ISC | 27 mA | ||||
| Supply Voltage Operating Range | VIN | 5.5 | 18 V | |||
| Supply Voltage Headroom | VIN − VOUT | 500 mV | ||||
| Operating Temperature Range | TA | −40°C | +125°C |
Key Features
- Ultralow Noise: The ADR444ARMZ features ultralow noise performance, making it suitable for high-precision applications.
- High Accuracy: Offers high accuracy with initial accuracy as low as ±1.6 mV for the B grade and ±5 mV for the A grade.
- Low Temperature Drift: Utilizes patented temperature drift curvature correction to minimize temperature drift, with values as low as 1 ppm/°C for the B grade and 2 ppm/°C for the A grade.
- Current Capability: Can source up to 10 mA and sink up to −5 mA of output current.
- Trim Terminal: Includes a trim terminal to adjust the output voltage over a 0.5% range without compromising performance.
- Low Supply Voltage Headroom: Operates with a supply voltage headroom as low as 500 mV.
- Extended Temperature Range: Specified over the extended industrial temperature range of −40°C to +125°C.
- Package Options: Available in 8-lead MSOP and narrow SOIC packages.
Applications
The ADR444ARMZ is ideally suited for precision signal conversion applications in various fields, including:
- High-End Data Acquisition Systems: Where high accuracy and low noise are critical.
- Optical Networks: For precise voltage references in optical communication systems.
- Medical Applications: Where reliability and precision are paramount.
Q & A
- What is the output voltage of the ADR444ARMZ?
The output voltage of the ADR444ARMZ is 4.096V, with an initial accuracy of ±5 mV for the A grade and ±1.6 mV for the B grade. - What is the temperature drift of the ADR444ARMZ?
The temperature drift is as low as 1 ppm/°C for the B grade and 2 ppm/°C for the A grade over the temperature range of −40°C to +125°C. - What is the maximum output current that the ADR444ARMZ can source?
The ADR444ARMZ can source up to 10 mA of output current and sink up to −5 mA. - What is the supply voltage operating range for the ADR444ARMZ?
The supply voltage operating range is from 5.5 V to 18 V. - What are the package options available for the ADR444ARMZ?
The ADR444ARMZ is available in 8-lead MSOP and narrow SOIC packages. - What is the ripple rejection ratio of the ADR444ARMZ?
The ripple rejection ratio is −80 dB at a frequency of 1 kHz. - Can the ADR444ARMZ be used in high-temperature environments?
Yes, the ADR444ARMZ is specified over the extended industrial temperature range of −40°C to +125°C. - How does the ADR444ARMZ adjust its output voltage?
The ADR444ARMZ includes a trim terminal to adjust the output voltage over a 0.5% range without compromising performance. - What are some typical applications of the ADR444ARMZ?
The ADR444ARMZ is typically used in high-end data acquisition systems, optical networks, and medical applications. - What is the short-circuit current to ground for the ADR444ARMZ?
The short-circuit current to ground is 27 mA.
