Overview
The ADR431BR, produced by Analog Devices Inc., is a member of the ADR43x series of XFET® voltage references. These devices are renowned for their low noise, high accuracy, and minimal temperature drift. The ADR431BR specifically offers a stable 2.5V output voltage, making it an ideal choice for applications requiring precise voltage referencing.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage | VOUT | 2.497 | 2.500 | 2.503 | V |
| Initial Accuracy (A Grade) | VOERR | ±3 mV | |||
| Initial Accuracy (B Grade) | VOERR | ±1 mV | |||
| Temperature Coefficient (A Grade) | TCVOUT | 10 ppm/°C | |||
| Temperature Coefficient (B Grade) | TCVOUT | 3 ppm/°C | |||
| Line Regulation | ∆VOUT/∆VIN | 20 ppm/V | |||
| Load Regulation | ∆VOUT/∆IL | 15 ppm/mA | |||
| Supply Voltage Operating Range | VIN | 4.5 V | 18 V | ||
| Output Current Source/Sink Capability | +30 mA / -20 mA | ||||
| Operating Temperature Range | TA | -40°C | +125°C |
Key Features
- Low noise: 3.5 µV p-p at 2.5 V output (0.1 Hz to 10.0 Hz)
- No external capacitor required
- Low temperature coefficient: A Grade (10 ppm/°C), B Grade (3 ppm/°C)
- High output source and sink current: up to +30 mA and -20 mA
- Wide operating range: 4.5 V to 18 V
- Trim terminal to adjust output voltage over a 0.5% range
- Available in 8-lead MSOP and 8-lead narrow SOIC packages
Applications
- Precision data acquisition systems
- High resolution data converters
- Medical instruments
- Industrial process control systems
- Optical control circuits
- Precision instruments
Q & A
- What is the output voltage of the ADR431BR?
The output voltage of the ADR431BR is 2.5 V. - What is the initial accuracy of the ADR431BR?
The initial accuracy for the A Grade is ±3 mV and for the B Grade is ±1 mV. - What is the temperature coefficient of the ADR431BR?
The temperature coefficient for the A Grade is up to 10 ppm/°C and for the B Grade is up to 3 ppm/°C. - Does the ADR431BR require an external capacitor?
No, the ADR431BR does not require an external capacitor. - What is the operating temperature range of the ADR431BR?
The operating temperature range is -40°C to +125°C. - What is the supply voltage operating range of the ADR431BR?
The supply voltage operating range is 4.5 V to 18 V. - What are the output current source and sink capabilities of the ADR431BR?
The ADR431BR can source up to 30 mA and sink up to 20 mA of output current. - In what packages is the ADR431BR available?
The ADR431BR is available in 8-lead MSOP and 8-lead narrow SOIC packages. - What are some typical applications of the ADR431BR?
Typical applications include precision data acquisition systems, high resolution data converters, medical instruments, industrial process control systems, and precision instruments. - Is the ADR431BR suitable for defense and aerospace applications?
Yes, the ADR431-EP version supports defense and aerospace applications (AQEC standard), but the standard ADR431BR does not have this specific certification.
