Overview
The ADR291GRU-REEL7 is a low noise, micropower precision voltage reference IC produced by Analog Devices Inc. It utilizes the XFET® reference circuit, which offers significant performance improvements over traditional band gap and buried Zener-based references. This device is part of the ADR291 family, known for its high accuracy, low thermal hysteresis, and excellent long-term stability. The ADR291GRU-REEL7 is particularly suited for low power applications, such as battery-powered instrumentation, due to its low quiescent current of 12 μA and operation from supplies as low as 2.8 V.
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 | - | mV |
| Temperature Coefficient | TCVOUT | IOUT = 0 mA | 3 | 8 | 10 | ppm/°C |
| Line Regulation | ∆VOUT/∆VIN | VS = 4.5 V to 15 V, IOUT = 0 mA | 35 | - | 125 | ppm/V |
| Load Regulation | ∆VOUT/∆ILOAD | VS = 5.0 V, IOUT = 0 mA to 5 mA | 20 | - | 125 | ppm/mA |
| Supply Current | IS | TA = 25°C | 9 | - | 12 | μA |
| Thermal Hysteresis | VOUT-HYS | - | - | 50 | ppm |
Key Features
- Low Noise and High Accuracy: The ADR291GRU-REEL7 features low voltage noise and high output accuracy, making it suitable for precision applications.
- Micropower Operation: With a quiescent current of only 12 μA, this device is ideal for battery-powered and low power applications.
- XFET Reference Circuit: Utilizes the XFET architecture, which provides significant performance improvements over traditional reference circuits.
- Low Thermal Hysteresis: Ensures excellent long-term stability and minimal drift over temperature.
- Wide Operating Temperature Range: Specified over the extended industrial temperature range of −40°C to +125°C.
- Multiple Package Options: Available in 8-lead SOIC, 8-lead TSSOP, and 3-lead TO-92 packages.
Applications
- Battery-Powered Instrumentation: Ideal for handheld, battery-operated equipment due to its low power consumption.
- Analog-to-Digital and Digital-to-Analog Converters: Well-suited for use with converters like the AD7701, enhancing the performance of data conversion systems.
- Precision Measurement Systems: Used in systems requiring high accuracy and stability, such as those measuring chemical, physical, or biological processes.
- Low Power Designs: Suitable for any application requiring a precise voltage reference with minimal power consumption.
Q & A
- What is the output voltage of the ADR291GRU-REEL7?
The output voltage of the ADR291GRU-REEL7 is 2.5 V.
- What is the quiescent current of the ADR291GRU-REEL7?
The quiescent current is 12 μA.
- What is the temperature coefficient of the ADR291GRU-REEL7?
The temperature coefficient is up to 10 ppm/°C.
- What are the package options for the ADR291GRU-REEL7?
It is available in 8-lead SOIC, 8-lead TSSOP, and 3-lead TO-92 packages.
- What is the operating temperature range of the ADR291GRU-REEL7?
The device operates over the extended industrial temperature range of −40°C to +125°C.
- What makes the ADR291GRU-REEL7 suitable for battery-powered applications?
Its low quiescent current and low power consumption make it ideal for battery-powered instrumentation.
- Can the ADR291GRU-REEL7 be used with analog-to-digital converters?
Yes, it is well-suited for use with converters like the AD7701.
- What is the line regulation of the ADR291GRU-REEL7?
The line regulation is typically 35 ppm/V to 125 ppm/V.
- What is the load regulation of the ADR291GRU-REEL7?
The load regulation is typically 20 ppm/mA to 125 ppm/mA.
- What is the thermal hysteresis of the ADR291GRU-REEL7?
The thermal hysteresis is 50 ppm.
