Overview
The ADR425ARMZ-REEL7, produced by Analog Devices Inc., is an ultraprecision, low-noise voltage reference from the ADR42x series. This device features the second-generation eXtra implanted junction FET (XFET) technology, which provides superior accuracy, low noise, and excellent long-term stability. The ADR425 is available in 8-lead MSOP packages and is specified over an extended industrial temperature range of −40°C to +125°C, making it suitable for a wide range of precision applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage | VOUT | A Grade | 4.994 | 5.000 | 5.006 | V |
| B Grade | 4.998 | 5.000 | 5.002 | V | ||
| Initial Accuracy | VOUTERR | A Grade | −6 | +6 | mV | |
| B Grade | −1.5 | +1.5 | mV | |||
| Temperature Coefficient | TCVOUT | A Grade | 2 | 10 | ppm/°C | |
| B Grade | 1 | 3 | ppm/°C | |||
| Supply Voltage Headroom | VIN − VOUT | 2 | V | |||
| Line Regulation | ΔVOUT/ΔVIN | VIN = 5 V to 18 V | 10 | 35 | ppm/V | |
| Load Regulation | ΔVOUT/ΔIL | IL = 0 mA to 10 mA | 70 | ppm/mA | ||
| Quiescent Current | IIN | No load | 390 | 500 | 600 | µA |
| Voltage Noise (0.1 Hz to 10 Hz) | eN p-p | 2 | µV p-p | |||
| Voltage Noise Density at 1 kHz | eN | 90 | nV/√Hz | |||
| Turn-On Settling Time | tR | 10 | µs | |||
| Long-Term Stability (1000 hours) | ΔVOUT | 50 | ppm | |||
| Output Voltage Hysteresis | VOUT_HYS | 40 | ppm | |||
| Ripple Rejection Ratio at 1 kHz | RRR | −75 | dB | |||
| Short Circuit to GND | ISC | 27 | mA |
Key Features
- Ultraprecision Voltage Reference: The ADR425 features XFET technology, providing high accuracy and low noise.
- Low Noise: Voltage noise of 2 µV p-p (0.1 Hz to 10 Hz) and 90 nV/√Hz at 1 kHz.
- High Accuracy: Initial accuracy as low as ±1.5 mV for B Grade and ±6 mV for A Grade.
- Excellent Long-Term Stability: Long-term stability of 50 ppm over 1000 hours.
- Temperature Stability: Temperature coefficient as low as 1 ppm/°C for B Grade and 2 ppm/°C for A Grade.
- Adjustable Output Voltage: The trim terminal allows adjustment of the output voltage over a ±0.5% range without compromising performance.
- Compact Packaging: Available in 8-lead MSOP packages, which are 30% smaller than SOIC packages.
Applications
The ADR425ARMZ-REEL7 is ideal for precision conversion applications, including:
- Optical Networks: High accuracy and low noise make it suitable for optical communication systems.
- Medical Equipment: The device's stability and accuracy are crucial for medical devices requiring precise voltage references.
- Industrial Automation: Used in various industrial automation applications where high precision and reliability are necessary.
- Test and Measurement Equipment: Suitable for equipment that requires stable and accurate voltage references.
Q & A
- What is the output voltage of the ADR425ARMZ-REEL7?
The output voltage is 5.00 V, with initial accuracy ranging from ±1.5 mV for B Grade to ±6 mV for A Grade. - What is the temperature range for the ADR425ARMZ-REEL7?
The device is specified over an extended industrial temperature range of −40°C to +125°C. - What is the noise performance of the ADR425ARMZ-REEL7?
The device has a voltage noise of 2 µV p-p (0.1 Hz to 10 Hz) and 90 nV/√Hz at 1 kHz. - What is the long-term stability of the ADR425ARMZ-REEL7?
The long-term stability is 50 ppm over 1000 hours. - Can the output voltage of the ADR425ARMZ-REEL7 be adjusted?
Yes, the trim terminal allows adjustment of the output voltage over a ±0.5% range without compromising performance. - What are the package options for the ADR425ARMZ-REEL7?
The device is available in 8-lead MSOP packages. - What is the quiescent current of the ADR425ARMZ-REEL7?
The quiescent current is 390 µA to 500 µA (no load), and up to 600 µA over the full temperature range. - What is the ripple rejection ratio of the ADR425ARMZ-REEL7?
The ripple rejection ratio is −75 dB at 1 kHz. - Is the ADR425ARMZ-REEL7 suitable for high-precision applications?
Yes, it is designed for high-precision applications due to its low noise, high accuracy, and excellent long-term stability. - What are some common applications of the ADR425ARMZ-REEL7?
Common applications include optical networks, medical equipment, industrial automation, and test and measurement equipment.
