Low Noise Voltage Reference ADR421
The Analog Devices ADR421, from the XFET® series, is a versatile voltage reference IC for power management applications. It delivers a stable 2.5V output with high precision (±0.12%) and offers the flexibility to adjust the output voltage within a +/-0.5% range using a trim pin.
Description
Precision at Its Finest: Introducing the ADR421 Voltage Reference
The ADR421 is part of Analog Devices' exceptional XFET® series, a family of precision voltage references renowned for their remarkable performance characteristics. These devices are meticulously designed to meet the exacting requirements of precision applications. The ADR421, in particular, stands out with its outstanding features.
Key Features:
Low Noise:
Within the 0.1 Hz to 10 Hz frequency range, the ADR421 boasts a mere 1.75 μV peak-to-peak noise, making it ideal for applications requiring precise measurements.
Low-Temperature Coefficient:
With a temperature coefficient of just 3 ppm/°C, this voltage reference exhibits minimal output voltage variation over a wide temperature range.
Exceptional Long-Term Stability:
Over 1000 hours, the ADR421 maintains a remarkable stability of 50 ppm, ensuring consistent performance.
Efficient Regulation:
Load regulation is well-controlled at 70 ppm/mA, and line regulation at 35 ppm/V, guaranteeing stable voltage outputs.
Hysteresis Minimization:
This chip minimizes hysteresis, with a typical value of 40 ppm, ensuring precise voltage regulation.
Operating Specifications:
Wide Voltage Input Range: The ADR421 accommodates voltage inputs from 4.5 V to 18 V, offering flexibility in various applications.
Low Quiescent Current: It maintains an energy-efficient profile, drawing a maximum of 0.5 mA, making it suitable for battery-powered and low-power devices.
High Output Current Support: This circuit offers robust support for output currents up to 10 mA.
Broad Temperature Range: Designed to function reliably, it operates effectively across a broad temperature range, from -40°C to +125°C.
Package:
Applications:
The ADR421's remarkable precision and outstanding performance characteristics render it highly suitable for a variety of applications. This includes:
Precision Data Acquisition Systems: Ideal for applications requiring precise measurements and data collection.
High-Resolution Converters: Ensures high-precision voltage references for converters.
Battery-Powered Instrumentation: Ideal for low-power, battery-driven instruments.
Portable Medical Instruments: Reliable performance in critical medical equipment.
Industrial Process Control Systems: Ensures accuracy in control systems.
Precision Instruments: A dependable component in various precision instruments.
Optical Network Control Circuits: Ensures precision and stability in optical network systems.
In addition to the ADR421, this series includes several related chip models such as ADR421ARZ, ADR421ARZ-REEL7, ADR421ARMZ, ADR421ARMZ-REEL7, ADR421BR, ADR421BR-REEL7, ADR421BRZ, and ADR421BRZ-REEL7.
These outstanding products are part of Analog Devices' commitment to precision engineering and performance excellence. The ADR421, as a member of the XFET® series, sets the standard for high-precision voltage references, delivering stability and accuracy across a wide range of applications.
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Product details：
Basic Part Number: ADR421
Category: Integrated Circuits (IC), Power Management (PMIC), Voltage Reference
Manufacturer: Analog Devices Inc.
Series: XFET®
Operating Temperature: -40°C to 125°C
Packaging: Tube
Tolerance: ±0.12%
Terminations: SMD/SMT
Temperature Coefficient: 10ppm/°C
Terminal Position: Dual
Peak Reflow Temperature: 260°C
Number of Functions: 1
Terminal Spacing: 0.65mm
Time at Peak Reflow Temperature (Max): 30 seconds
Number of Outputs: 1
Output Voltage: 2.5V
Output Type: Fixed
Maximum Output Current: 10mA
Minimum Supply Voltage (Vsup): 5V
Number of Channels: 1
Operating Supply Current: 500μA
Input Voltage Range: 4.5V~18V
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