Overview
The ADR291GRUZ, produced by Analog Devices Inc., is a low noise, micropower precision voltage reference that utilizes the XFET® reference circuit. This device is part of the ADR291 and ADR292 family, which offers significant performance improvements over traditional band gap and buried Zener-based references. The ADR291GRUZ is particularly suited for applications requiring stable and accurate output voltages, especially in battery-powered instrumentation due to its low quiescent current.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage | IOUT = 0 mA | 2.488 | 2.5 | 2.512 | V |
| Supply Range | 2.8 | 15 | V | ||
| Supply Current | TA = 25°C | 9 | 12 | 15 | μA |
| Temperature Range | -40 | 125 | °C | ||
| Output Current | 5 | mA | |||
| Line Regulation | VS = 4.5 V to 15 V, IOUT = 0 mA | 35 | 125 | ppm/V | |
| Load Regulation | VS = 5.0 V, IOUT = 0 mA to 5 mA | 20 | 125 | ppm/mA | |
| Temperature Coefficient | IOUT = 0 mA | 3 | 25 | ppm/°C | |
| Thermal Hysteresis | 50 | ppm | |||
| Package | 8-Lead TSSOP |
Key Features
- Low noise: 8 μV and 12 μV p-p (0.1 Hz to 10 Hz)
- Low quiescent current: 12 μA maximum
- High output current: up to 5 mA
- Excellent temperature stability: temperature coefficients of 3 ppm/°C, 5 ppm/°C, and 10 ppm/°C for different grades
- Low thermal hysteresis: 50 ppm
- High accuracy: initial output accuracies of ±2 mV, ±3 mV, and ±6 mV maximum
- Extended industrial temperature range: -40°C to +125°C
- Available in 8-lead SOIC, 8-lead TSSOP, and 3-lead TO-92 packages
Applications
- Battery-powered instrumentation
- Low power, low voltage references for data converters
- Voltage regulators for portable equipment
- High voltage floating current sources
- Kelvin connections in precision measurement circuits
Q & A
- What is the output voltage of the ADR291GRUZ? The output voltage of the ADR291GRUZ is 2.5 V.
- What is the supply range for the ADR291GRUZ? The supply range is from 2.8 V to 15 V.
- How much current does the ADR291GRUZ consume? The supply current is typically 12 μA, with a maximum of 15 μA.
- What is the temperature range for the ADR291GRUZ? The device operates over a temperature range of -40°C to +125°C.
- What is the maximum output current of the ADR291GRUZ? The maximum output current is 5 mA.
- What are the key features of the XFET® reference circuit used in the ADR291GRUZ? The XFET® reference circuit offers low noise, low thermal hysteresis, and excellent long-term stability.
- In what packages is the ADR291GRUZ available? It is available in 8-lead SOIC, 8-lead TSSOP, and 3-lead TO-92 packages.
- What are some common applications for the ADR291GRUZ? Common applications include battery-powered instrumentation, low power references for data converters, and voltage regulators for portable equipment.
- How accurate is the output voltage of the ADR291GRUZ? The initial output accuracy is ±2 mV, ±3 mV, and ±6 mV maximum for different grades.
- What is the line regulation of the ADR291GRUZ? The line regulation is typically 35 ppm/V to 125 ppm/V.
