Overview
The ADR291FRZ-REEL, produced by Analog Devices Inc., is a low noise, micropower precision voltage reference. This device utilizes the XFET reference circuit, offering significant performance improvements over traditional band gap and buried Zener-based references. The ADR291 is designed to provide a stable and accurate output voltage of 2.5 V, making it ideal for applications requiring high precision and low power consumption.
Key Specifications
| Parameter | Symbol | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|---|
| Output Voltage | VOUT | IOUT = 0 mA | 2.493 | 2.5 | 2.507 | V |
| Initial Accuracy | VOERR | - | - | ±2 mV, ±3 mV, ±6 mV | - | |
| Temperature Coefficient | TCVOUT | IOUT = 0 mA | 3 | 8 ppm/°C | 25 ppm/°C | - |
| Line Regulation | ΔVOUT/ΔVIN | VS = 4.5 V to 15 V, IOUT = 0 mA | 35 | 125 ppm/V | - | |
| Load Regulation | ΔVOUT/ΔILOAD | VS = 5.0 V, IOUT = 0 mA to 5 mA | 20 | 125 ppm/mA | - | |
| Supply Current | IS | TA = 25°C | - | 12 μA | 15 μA | - |
| Operating Temperature Range | TA | - | -40°C | - | +125°C | - |
| Package Types | - | - | - | - | 8-lead SOIC, 8-lead TSSOP, 3-lead TO-92 | - |
Key Features
- Low Noise: The ADR291 features low noise performance with 8 μV and 12 μV p-p (0.1 Hz to 10 Hz), making it suitable for high-precision applications.
- Micropower Consumption: With a quiescent current of only 12 μA, this device is ideal for battery-powered instrumentation.
- High Output Current: The device can supply up to 5 mA of output current.
- Low Thermal Hysteresis: Offers low thermal hysteresis and excellent long-term stability.
- Wide Supply Range: Operates from a supply range of 2.8 V to 15 V.
- Extended Temperature Range: Specified over the extended industrial temperature range of −40°C to +125°C.
Applications
- Low Power, Low Voltage Reference for Data Converters: Ideal for providing a stable reference voltage in data converter applications.
- Voltage Regulator for Portable Equipment: Suitable for use in portable equipment due to its low power consumption and high precision.
- High Voltage Floating Current Source: Can be used in circuits requiring a high voltage floating current source.
- Kelvin Connections: Useful in applications requiring Kelvin connections for precise voltage measurements.
Q & A
- What is the output voltage of the ADR291FRZ-REEL?
The output voltage of the ADR291FRZ-REEL is 2.5 V.
- What is the quiescent current of the ADR291FRZ-REEL?
The quiescent current is only 12 μA.
- What are the available package types for the ADR291FRZ-REEL?
The device is available in 8-lead SOIC, 8-lead TSSOP, and 3-lead TO-92 packages.
- What is the operating temperature range of the ADR291FRZ-REEL?
The operating temperature range is −40°C to +125°C.
- What are the key features of the XFET reference circuit used in the ADR291FRZ-REEL?
The XFET reference circuit offers low noise, low thermal hysteresis, and excellent long-term stability.
- Can the ADR291FRZ-REEL be used in battery-powered applications?
Yes, it is ideal for battery-powered instrumentation due to its low power consumption.
- What is the maximum output current of the ADR291FRZ-REEL?
The device can supply up to 5 mA of output current.
- How does the ADR291FRZ-REEL perform in terms of line and load regulation?
The device typically has line regulation of 35 ppm/V and load regulation of 20 ppm/mA.
- What are some common applications of the ADR291FRZ-REEL?
Common applications include low power, low voltage references for data converters, voltage regulators for portable equipment, and high voltage floating current sources.
- What is the initial accuracy of the ADR291FRZ-REEL?
The initial accuracy is ±2 mV, ±3 mV, and ±6 mV maximum, depending on the grade.
