Overview
The ADR421BR-REEL7 is a high-precision voltage reference IC produced by Analog Devices Inc. It is part of the ADR42x series, which features ultraprecision, low noise, and excellent long-term stability. The ADR421 utilizes Analog Devices' patented XFET (eXtra implanted junction FET) technology, which offers superior accuracy and thermal hysteresis compared to traditional band gap references. This device is available in 8-lead SOIC and MSOP packages, making it versatile for various applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage | VOUT | A Grade | 2.497 | 2.500 | 2.503 | V |
| B Grade | 2.499 | 2.500 | 2.501 | V | ||
| Initial Accuracy | VOUTERR | A Grade | −3 | +3 | mV | |
| B Grade | −1 | +1 | 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 |
| Max Operating Temperature | 125 | °C | ||||
| Min Operating Temperature | −40 | °C | ||||
| Max Output Current | 10 | mA |
Key Features
- XFET Technology: Utilizes Analog Devices' patented XFET technology for superior accuracy and thermal hysteresis.
- High Precision: Offers high accuracy with initial accuracy as low as ±1 mV for B Grade and ±3 mV for A Grade.
- Low Noise: Features low noise characteristics, making it suitable for precision applications.
- Temperature Stability: Specified over an extended industrial temperature range of −40°C to +125°C with a low temperature coefficient.
- Adjustable Output Voltage: The trim terminal can be used to adjust the output voltage over a ±0.5% range without compromising other performance parameters.
- Low Power and Supply Headroom: Operates at lower power and lower supply headroom compared to buried Zener references.
- Compact Packaging: Available in 8-lead SOIC and MSOP packages, which are 30% smaller than traditional SOIC packages.
Applications
The ADR421BR-REEL7 is ideal for various precision applications, including:
- Precision Conversion Applications: Suitable for high-precision analog-to-digital converters (ADCs) and digital-to-analog converters (DACs).
- Optical Networks: Used in optical communication systems for stable and accurate voltage references.
- Medical Equipment: Employed in medical devices that require high precision and low noise voltage references.
- Industrial Automation: Used in industrial control systems where stable and accurate voltage references are crucial.
Q & A
- What is the output voltage of the ADR421BR-REEL7?
The output voltage of the ADR421BR-REEL7 is 2.5 V with an initial accuracy of ±1 mV for B Grade and ±3 mV for A Grade.
- What is the operating temperature range of the ADR421BR-REEL7?
The ADR421BR-REEL7 operates over an extended industrial temperature range of −40°C to +125°C.
- What is the maximum output current of the ADR421BR-REEL7?
The maximum output current of the ADR421BR-REEL7 is 10 mA.
- What technology does the ADR421BR-REEL7 use?
The ADR421BR-REEL7 uses Analog Devices' patented XFET (eXtra implanted junction FET) technology.
- What are the available package types for the ADR421BR-REEL7?
The ADR421BR-REEL7 is available in 8-lead SOIC and MSOP packages.
- Can the output voltage of the ADR421BR-REEL7 be adjusted?
Yes, the output voltage can be adjusted over a ±0.5% range using the trim terminal without compromising other performance parameters.
- What are some typical applications of the ADR421BR-REEL7?
The ADR421BR-REEL7 is typically used in precision conversion applications, optical networks, medical equipment, and industrial automation.
- What is the quiescent current of the ADR421BR-REEL7?
The quiescent current of the ADR421BR-REEL7 is typically 500 µA with no load, and up to 600 µA over the operating temperature range.
- How does the ADR421BR-REEL7 handle temperature drift?
The ADR421BR-REEL7 uses a patented temperature drift curvature correction technique to minimize nonlinearity of the voltage change with temperature.
- What is the line regulation of the ADR421BR-REEL7?
The line regulation of the ADR421BR-REEL7 is 10 to 35 ppm/V over the supply voltage range of 5 V to 18 V.
