Overview
The ADR421ARM-REEL7 is a precision voltage reference from Analog Devices Inc., part of the ADR42x series. This ultraprecision voltage reference features low noise, high accuracy, and stability, making it ideal for various high-precision applications. The device utilizes Analog Devices' patented XFET (eXtra implanted junction FET) technology, which minimizes nonlinearity of the voltage change with temperature. It is available in an 8-pin MSOP package and is specified over the extended industrial temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage (A Grade) | VOUT | VIN = 5.0 V to 15.0 V, TA = 25°C | 2.497 | 2.500 | 2.503 | V |
| Output Voltage (B Grade) | VOUT | VIN = 5.0 V to 15.0 V, TA = 25°C | 2.499 | 2.500 | 2.501 | V |
| Initial Accuracy (A Grade) | VOUTERR | VIN = 5.0 V to 15.0 V, TA = 25°C | –3 mV | +3 mV | mV / % | |
| Initial Accuracy (B Grade) | VOUTERR | VIN = 5.0 V to 15.0 V, TA = 25°C | –1 mV | +1 mV | mV / % | |
| Temperature Coefficient (A Grade) | TCVOUT | –40°C < TA < +125°C | 2 ppm/°C | 10 ppm/°C | ppm/°C | |
| Temperature Coefficient (B Grade) | TCVOUT | –40°C < TA < +125°C | 1 ppm/°C | 3 ppm/°C | ppm/°C | |
| Supply Voltage Headroom | VIN – VOUT | VIN = 5 V to 18 V | 2 V | V | ||
| Line Regulation | ΔVOUT/ΔVIN | VIN = 5 V to 18 V, –40°C < TA < +125°C | 10 ppm/V | 35 ppm/V | ppm/V | |
| Load Regulation | ΔVOUT/ΔIL | IL = 0 mA to 10 mA, –40°C < TA < +125°C | 70 ppm/mA | ppm/mA | ||
| Quiescent Current | IIN | No load, –40°C < TA < +125°C | 390 μA | 500 μA | 600 μA | μA |
| Package | MSOP-8 |
Key Features
- Ultraprecision Voltage Reference: Offers high accuracy and stability with output voltages of 2.048 V, 2.500 V, 3.00 V, and 5.00 V.
- Low Noise: Features low noise characteristics, making it suitable for high-precision applications.
- XFET Technology: Utilizes Analog Devices' patented XFET technology to minimize nonlinearity of the voltage change with temperature.
- Wide Operating Range: Operates over a supply voltage range of 5 V to 18 V and is specified over the extended industrial temperature range of –40°C to +125°C.
- Low Power Consumption: Low quiescent current, making it ideal for battery-powered applications.
- Trim Terminal: Allows for adjustment of the output voltage over a ±0.5% range without affecting the temperature coefficient.
- High Ripple Rejection Ratio: Provides a high ripple rejection ratio, ensuring stable output voltage under varying input conditions.
Applications
- High-Precision Measurement Systems: Ideal for use in precision measurement systems, such as those involving A/D converters, D/A converters, and other high-accuracy circuits.
- Battery-Powered Devices: Suitable for battery-powered applications due to its low power consumption and wide operating voltage range.
- Industrial Automation: Used in industrial automation systems where stable and accurate voltage references are critical.
- Medical Devices: Applicable in medical devices requiring high precision and stability, such as in the measurement of biological processes.
- Aerospace and Defense: Employed in aerospace and defense applications where high reliability and precision are essential.
Q & A
- What is the output voltage of the ADR421ARM-REEL7?
The output voltage of the ADR421ARM-REEL7 is 2.500 V, with an initial accuracy of ±0.12% for the A grade and ±0.04% for the B grade.
- What is the operating temperature range of the ADR421ARM-REEL7?
The device operates over the extended industrial temperature range of –40°C to +125°C.
- What is the supply voltage range for the ADR421ARM-REEL7?
The supply voltage range is from 5 V to 18 V.
- What is the quiescent current of the ADR421ARM-REEL7?
The quiescent current is typically 500 μA, with a maximum of 600 μA over the operating temperature range.
- Can the output voltage of the ADR421ARM-REEL7 be adjusted?
Yes, the output voltage can be adjusted over a ±0.5% range using the trim terminal without affecting the temperature coefficient.
- What is the ripple rejection ratio of the ADR421ARM-REEL7?
The ripple rejection ratio is 90 dB at a frequency of 10 kHz.
- What package type is the ADR421ARM-REEL7 available in?
The device is available in an 8-pin MSOP package.
- Is the ADR421ARM-REEL7 RoHS compliant?
Yes, the ADR421ARM-REEL7 is RoHS compliant.
- What are some typical applications of the ADR421ARM-REEL7?
Typical applications include high-precision measurement systems, battery-powered devices, industrial automation, medical devices, and aerospace and defense.
- How does the XFET technology benefit the ADR421ARM-REEL7?
The XFET technology minimizes nonlinearity of the voltage change with temperature, ensuring high accuracy and stability over the operating temperature range.
