Overview
The REF195GRUZ-REEL7 is a precision micropower, low dropout voltage (LDV) reference IC from Analog Devices Inc. This device is part of the REF19x series, known for its high accuracy and stability over a wide temperature range. The REF195GRUZ-REEL7 uses a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors to achieve a very low temperature coefficient and high initial accuracy. It is designed to provide a stable output voltage from supplies as low as 100 mV above the output voltage, making it suitable for various low-power applications.
Key Specifications
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Initial Accuracy | VO | E Grade, IOUT = 0 mA | 2.498 | 2.500 | 2.502 | V |
| Line Regulation | ΔVO/ΔVIN | E Grade, 3.0 V ≤ VS ≤ 15 V, IOUT = 0 mA | 2 | 4 | ppm/V | |
| Load Regulation | ΔVO/ΔILOAD | E Grade, VS = 5.0 V, 0 mA ≤ IOUT ≤ 30 mA | 4 | 10 | ppm/mA | |
| Dropout Voltage | VS - VO | VS = 3.5 V, ILOAD = 10 mA | 1.00 | 1.40 | V | |
| Supply Current | No load | 45 | μA | |||
| Supply Current in Sleep Mode | No load | 15 | μA | |||
| Temperature Coefficient | TCVO | E Grade, IOUT = 0 mA | 2 | 5 | ppm/°C | |
| Operating Temperature Range | TA | -40 | 85 | °C |
Key Features
- High Output Current: Up to 30 mA.
- Low Supply Current: Maximum of 45 μA, and less than 15 μA in sleep mode.
- High Initial Accuracy: ±2 mV maximum for the E grade.
- Low Dropout Voltage: Stable output voltage from supplies as low as 100 mV above the output voltage.
- Temperature Drift Curvature Correction: Achieves a very low temperature coefficient.
- Short-Circuit Protection: Ensures device safety under fault conditions.
- Sleep Mode: Reduces supply current to less than 15 μA when enabled.
Applications
- Portable Instruments: Ideal for battery-powered devices due to low power consumption.
- ADCs and DACs: Provides stable reference voltages for analog-to-digital and digital-to-analog converters.
- Smart Sensors: Suitable for sensors that require high accuracy and low power consumption.
- Solar Powered Applications: Efficient operation makes it suitable for solar-powered systems.
- Loop-Current-Powered Instruments: Can be used in instruments powered by loop currents.
- Automotive Applications: Specified over the extended industrial temperature range, making it suitable for automotive use.
Q & A
- What is the typical supply current of the REF195GRUZ-REEL7?
The typical supply current is 45 μA, and it reduces to less than 15 μA in sleep mode.
- What is the initial accuracy of the REF195GRUZ-REEL7?
The initial accuracy is ±2 mV maximum for the E grade.
- What is the operating temperature range of the REF195GRUZ-REEL7?
The operating temperature range is -40°C to +85°C.
- What is the maximum output current of the REF195GRUZ-REEL7?
The maximum output current is 30 mA.
- Does the REF195GRUZ-REEL7 have short-circuit protection?
Yes, it has short-circuit protection to ensure device safety under fault conditions).
- What is the dropout voltage of the REF195GRUZ-REEL7?
The dropout voltage is as low as 1.00 V at VS = 3.5 V and ILOAD = 10 mA).
- What is the temperature coefficient of the REF195GRUZ-REEL7?
The temperature coefficient is 2 to 5 ppm/°C for the E grade).
- What package types are available for the REF195GRUZ-REEL7?
The device is available in an 8-lead TSSOP package).
- What are some common applications of the REF195GRUZ-REEL7?
Common applications include portable instruments, ADCs and DACs, smart sensors, solar powered applications, and loop-current-powered instruments).
- Is a capacitor required for proper operation of the REF195GRUZ-REEL7?
Yes, a 1 μF capacitor is required between the output pin and the GND pin of the device for proper operation).
