Overview
The ADR421ARM is a high-precision voltage reference device produced by Analog Devices Inc. It is part of the ADR42x series, which features ultraprecision, low noise, and high accuracy characteristics. This device is particularly notable for its use of eXtra implanted junction FET (XFET) technology, which minimizes nonlinearity of the voltage change with temperature and offers superior accuracy and thermal hysteresis compared to traditional band gap references. The ADR421ARM is available in 8-lead SOIC and MSOP packages, making it suitable for a variety of applications requiring stable and accurate voltage references.
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 | - | 3 | mV |
| Initial Accuracy (B Grade) | VOUTERR | VIN = 5.0 V to 15.0 V, TA = 25°C | -1 | - | 1 | mV |
| Temperature Coefficient (A Grade) | TCVOUT | -40°C < TA < +125°C | 2 | - | 10 | ppm/°C |
| Temperature Coefficient (B Grade) | TCVOUT | -40°C < TA < +125°C | 1 | - | 3 | ppm/°C |
| Supply Voltage Headroom | VIN - VOUT | - | - | 2 | V | |
| Line Regulation | ΔVOUT/ΔVIN | VIN = 5 V to 18 V, -40°C < TA < +125°C | 10 | - | 35 | ppm/V |
| Operating Temperature Range | TA | - | - | -40°C to +125°C | °C | |
| Package | - | - | - | 8-lead SOIC or 8-lead MSOP | - |
Key Features
- High Accuracy and Stability: The ADR421ARM offers high accuracy with initial accuracy as low as ±1 mV for B Grade and ±3 mV for A Grade, and a temperature coefficient of 1 to 10 ppm/°C.
- Low Noise: The device features low noise characteristics, making it suitable for applications requiring high precision and stability.
- XFET Technology: Utilizes eXtra implanted junction FET technology to minimize nonlinearity of the voltage change with temperature and provide superior thermal hysteresis.
- Adjustable Output Voltage: The trim terminal can be used to adjust the output voltage over a ±0.5% range without affecting the temperature coefficient.
- Low Power Consumption: Operates with low power consumption, making it ideal for battery-powered applications.
- Wide Operating Range: Specified over the extended industrial temperature range of -40°C to +125°C.
- Compact Packages: Available in 8-lead SOIC and MSOP packages, which are 30% smaller than SOIC packages.
Applications
- Precision Conversion Applications: Ideal for applications such as optical networks, medical equipment, and other precision conversion needs where stable and accurate voltage references are crucial.
- Battery-Powered Devices: Suitable for 5 V battery-powered applications due to its low power consumption and low supply headroom.
- Industrial and Automotive Systems: The wide operating temperature range makes it suitable for use in industrial and automotive systems.
Q & A
- What is the output voltage of the ADR421ARM?
The output voltage of the ADR421ARM is approximately 2.500 V, with a range of 2.497 V to 2.503 V for A Grade and 2.499 V to 2.501 V for B Grade.
- What is the temperature coefficient of the ADR421ARM?
The temperature coefficient of the ADR421ARM is 2 to 10 ppm/°C for A Grade and 1 to 3 ppm/°C for B Grade over the operating temperature range of -40°C to +125°C.
- What packages are available for the ADR421ARM?
The ADR421ARM is available in 8-lead SOIC and 8-lead MSOP packages.
- Can the output voltage of the ADR421ARM 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 operating temperature range of the ADR421ARM?
The operating temperature range of the ADR421ARM is -40°C to +125°C.
- What technology does the ADR421ARM use?
The ADR421ARM uses eXtra implanted junction FET (XFET) technology to achieve high accuracy and stability.
- Is the ADR421ARM suitable for battery-powered applications?
Yes, the ADR421ARM is suitable for battery-powered applications due to its low power consumption and low supply headroom.
- What are some typical applications of the ADR421ARM?
The ADR421ARM is typically used in precision conversion applications such as optical networks, medical equipment, and other systems requiring stable and accurate voltage references.
- What is the line regulation of the ADR421ARM?
The line regulation of the ADR421ARM is 10 to 35 ppm/V over the input voltage range of 5 V to 18 V.
- Does the ADR421ARM have any special noise characteristics?
Yes, the ADR421ARM features low noise characteristics, making it suitable for high-precision applications.
