Overview
The ADR425ARM, produced by Analog Devices Inc., is an ultraprecision, second-generation eXtra implanted junction FET (XFET) voltage reference. This device is part of the ADR42x series, known for its low noise, high accuracy, and excellent long-term stability. The ADR425ARM is available in 8-lead SOIC and MSOP packages, offering a compact footprint suitable for various precision applications.
The XFET technology and patented temperature drift curvature correction technique ensure minimal nonlinearity of the voltage change with temperature, providing superior accuracy and thermal hysteresis compared to band gap references. It operates at lower power and lower supply headroom than buried Zener references, making it ideal for precision conversion applications such as optical networks and medical equipment.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (VOUT) | A Grade | 4.994 | 5.000 | 5.006 | V |
| Output Voltage (VOUT) | B Grade | 4.998 | 5.000 | 5.002 | V |
| Initial Accuracy (VOUTERR) | A Grade | -6 | - | 6 | mV |
| Temperature Coefficient | - | - | 3, 10 | ppm/°C | |
| Voltage Noise (eN p-p) | 0.1 Hz to 10 Hz | - | 3.4 | μV p-p | |
| Voltage Noise Density (eN) | 1 kHz | - | 90 | nV/√Hz | |
| Turn-On Settling Time (tR) | - | - | 10 | μs | |
| Long-Term Stability (∆VOUT) | 1000 hours | - | 50 | ppm | |
| Output Voltage Hysteresis (VO_HYS) | - | - | 40 | ppm | |
| Ripple Rejection Ratio (RRR) | fIN = 1 kHz | - | -75 | dB | |
| Short Circuit to GND (ISC) | - | - | 27 | mA | |
| Supply Voltage | - | 7.0 | - | 18 | V |
| Operating Temperature Range | - | -40 | - | 125 | °C |
Key Features
- Low Noise: The ADR425ARM features low voltage noise, with 3.4 μV p-p from 0.1 Hz to 10 Hz and 90 nV/√Hz at 1 kHz, making it suitable for high-precision applications.
- High Accuracy: The device offers high initial accuracy and low temperature coefficient of 3 ppm/°C, ensuring stable output voltage across a wide temperature range.
- Long-Term Stability: It exhibits excellent long-term stability with a drift of 50 ppm over 1000 hours.
- Output Voltage Adjustment: The trim terminal allows for adjusting the output voltage over a ±0.5% range without compromising other performance parameters.
- Low Hysteresis: The device has low output voltage hysteresis of 40 ppm, ensuring consistent performance.
- Wide Operating Range: It operates over a supply voltage range of 7 V to 18 V and an extended industrial temperature range of −40°C to +125°C.
- Compact Packaging: Available in 8-lead SOIC and MSOP packages, providing a compact solution for various applications.
Applications
- Precision Data Acquisition Systems: Ideal for high-resolution converters and precision data acquisition.
- Medical Equipment: Suitable for portable medical instruments due to its low noise and high accuracy.
- Optical Network Control Circuits: Used in optical network applications requiring stable and accurate voltage references.
- Industrial Process Control Systems: Applicable in industrial settings where precise voltage references are necessary.
- Battery-Powered Instrumentation: Suitable for battery-powered devices due to its low quiescent current.
- Precision Instruments: Used in various precision instruments requiring stable and accurate voltage references.
Q & A
- What is the output voltage of the ADR425ARM?
The output voltage of the ADR425ARM is 5.00 V, with initial accuracy ranging from 4.994 V to 5.006 V for the A grade and 4.998 V to 5.002 V for the B grade.
- What is the temperature coefficient of the ADR425ARM?
The temperature coefficient of the ADR425ARM is 3 ppm/°C.
- What is the voltage noise of the ADR425ARM?
The voltage noise of the ADR425ARM is 3.4 μV p-p from 0.1 Hz to 10 Hz and 90 nV/√Hz at 1 kHz.
- Can the output voltage of the ADR425ARM be adjusted?
Yes, the output voltage can be adjusted over a ±0.5% range using the trim terminal without compromising other performance parameters.
- What is the operating temperature range of the ADR425ARM?
The operating temperature range of the ADR425ARM is −40°C to +125°C.
- What are the typical applications of the ADR425ARM?
The ADR425ARM is typically used in precision data acquisition systems, medical equipment, optical network control circuits, industrial process control systems, battery-powered instrumentation, and precision instruments.
- What is the ripple rejection ratio of the ADR425ARM?
The ripple rejection ratio of the ADR425ARM is −75 dB at 1 kHz.
- What is the short-circuit current to ground for the ADR425ARM?
The short-circuit current to ground for the ADR425ARM is 27 mA.
- What are the available package types for the ADR425ARM?
The ADR425ARM is available in 8-lead SOIC and MSOP packages.
- What is the long-term stability of the ADR425ARM?
The long-term stability of the ADR425ARM is 50 ppm over 1000 hours.
- What is the supply voltage range for the ADR425ARM?
The supply voltage range for the ADR425ARM is 7 V to 18 V.
