Overview
The ADR431ARMZ, produced by Analog Devices Inc., is part of the ADR430/ADR431/ADR433/ADR434/ADR435 series of XFET® voltage references. These devices are known for their low noise, high accuracy, and low temperature drift performance. Utilizing Analog Devices' temperature drift curvature correction and extra implanted junction FET (XFET) technology, the ADR431 minimizes voltage change vs. temperature nonlinearity. This component operates at lower current (800 μA) and lower supply voltage headroom (2 V) compared to traditional buried Zener references, making it an efficient solution for various precision 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 | VOERR | A Grade | ±3 mV | ±0.12 % | ||
| B Grade | ±1 mV | ±0.04 % | ||||
| Temperature Coefficient | TCVOUT | A Grade, −40°C < TA < +125°C | 2 | 10 ppm/°C | ||
| B Grade, −40°C < TA < +125°C | 1 | 3 ppm/°C | ||||
| Supply Voltage Operating Range | VIN | 4.5 V | 18 V | |||
| Supply Voltage Headroom | VIN - VOUT | 2 V | ||||
| Output Current Source/Sink | +30 mA / -20 mA | |||||
| Operating Temperature Range | TA | −40°C | +125°C |
Key Features
- Low Noise and High Accuracy: The ADR431 features ultralow noise and high accuracy, making it suitable for precision applications.
- Low Temperature Drift: Utilizing XFET technology, the device minimizes voltage change vs. temperature nonlinearity, ensuring stable performance across a wide temperature range.
- Current Source and Sink Capability: The ADR431 can source up to 30 mA and sink up to −20 mA of output current.
- Trim Terminal: A trim terminal allows for adjusting the output voltage over a ±0.5% range without compromising performance.
- Low Supply Voltage Headroom: Operates with a supply voltage headroom of only 2 V, which is lower than traditional buried Zener references.
- Wide Operating Range: The device operates over a supply voltage range of 4.5 V to 18 V and an extended industrial temperature range of −40°C to +125°C.
Applications
- Precision Data Acquisition Systems: Ideal for systems requiring high accuracy and low noise voltage references.
- High Resolution Data Converters: Suitable for applications needing precise voltage references to ensure accurate conversions.
- Medical Instruments: Used in medical devices where high accuracy and stability are critical.
- Industrial Process Control Systems: Applies to systems that require reliable and precise voltage references for control and measurement.
- Optical Control Circuits: Utilized in optical systems that demand low noise and high accuracy voltage references.
- Precision Instruments: General use in any precision instrument requiring stable and accurate voltage references.
Q & A
- What is the output voltage of the ADR431?
The output voltage of the ADR431 is 2.5 V, with an initial accuracy of ±3 mV for A Grade and ±1 mV for B Grade.
- What is the temperature coefficient of the ADR431?
The temperature coefficient of the ADR431 is 2 ppm/°C for A Grade and 1 ppm/°C for B Grade over the temperature range of −40°C to +125°C.
- What is the supply voltage operating range of the ADR431?
The supply voltage operating range of the ADR431 is from 4.5 V to 18 V.
- How much current can the ADR431 source and sink?
The ADR431 can source up to 30 mA and sink up to −20 mA of output current.
- What is the operating temperature range of the ADR431?
The operating temperature range of the ADR431 is from −40°C to +125°C.
- What packages are available for the ADR431?
The ADR431 is available in 8-lead MSOP and 8-lead narrow SOIC packages.
- Does the ADR431 have a trim terminal?
Yes, the ADR431 has a trim terminal that allows for adjusting the output voltage over a ±0.5% range.
- What are some typical applications of the ADR431?
The ADR431 is typically used in precision data acquisition systems, high resolution data converters, medical instruments, industrial process control systems, optical control circuits, and precision instruments.
- How does the ADR431 compare to traditional buried Zener references?
The ADR431 operates at lower current (800 μA) and lower supply voltage headroom (2 V) compared to traditional buried Zener references.
- Is the ADR431 suitable for defense and aerospace applications?
Yes, the ADR431-EP version supports defense and aerospace applications and meets AQEC standards.
