Overview
The REF198GRU-REEL7 is a precision micropower, low dropout voltage reference from Analog Devices Inc. It is part of the REF19x series, which utilizes a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors. This design achieves a very low temperature coefficient and high initial accuracy. The device is suitable for applications requiring stable output voltage with minimal power consumption.
Key Specifications
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Nominal Output Voltage | VO | IOUT = 0 mA | 4.094 | 4.096 | 4.098 | V |
| Initial Accuracy | VO | IOUT = 0 mA | - | - | ±2 mV | - |
| Line Regulation | ΔVO/ΔVIN | 3.0 V ≤ VS ≤ 15 V, IOUT = 0 mA | 2 | 4 | 8 | ppm/V |
| Load Regulation | ΔVO/ΔILOAD | VS = 5.0 V, 0 mA ≤ IOUT ≤ 30 mA | 2 | 4 | 10 | ppm/mA |
| Dropout Voltage | VS - VO | VS = 3.5 V, ILOAD = 10 mA | - | 1.00 | - | V |
| Supply Current | IS | No load | - | 45 μA | - | - |
| Supply Current in Sleep Mode | IS | No load | - | 15 μA | - | - |
| Temperature Coefficient | TCVO | -40°C to +125°C | 2 | - | 10 | ppm/°C |
| Operating Temperature Range | TA | - | -40°C | - | +85°C | - |
| Package Type | - | - | - | - | 8-Lead TSSOP | - |
Key Features
- Precision micropower, low dropout voltage reference with a nominal output voltage of 4.096V.
- High initial accuracy with a maximum deviation of ±2 mV.
- Low temperature coefficient, ensuring stable output across a wide temperature range (-40°C to +125°C).
- Low supply current of 45 μA and reduced to 15 μA in sleep mode.
- Low dropout voltage, allowing operation with supplies as low as 100 mV above the output voltage.
- High output current capability of up to 30 mA.
- Short-circuit protection and load regulation of 4 ppm/mA.
- Available in 8-lead TSSOP package.
Applications
- Portable instruments and battery-powered devices.
- Analog-to-Digital Converters (ADCs) and Digital-to-Analog Converters (DACs).
- Smart sensors and IoT devices.
- Solar-powered applications and renewable energy systems.
- Loop-current-powered instruments and industrial control systems.
- Automotive and industrial applications requiring high reliability and precision voltage references.
Q & A
- What is the nominal output voltage of the REF198GRU-REEL7?
The nominal output voltage is 4.096V.
- What is the maximum initial accuracy of the REF198GRU-REEL7?
The maximum initial accuracy is ±2 mV.
- What is the operating temperature range of the REF198GRU-REEL7?
The operating temperature range is -40°C to +85°C, with typical performance specifications over -40°C to +125°C.
- How much supply current does the REF198GRU-REEL7 consume?
The device consumes less than 45 μA of supply current and reduces to less than 15 μA in sleep mode.
- What is the dropout voltage of the REF198GRU-REEL7?
The dropout voltage is approximately 1.00 V at VS = 3.5 V and ILOAD = 10 mA.
- What is the temperature coefficient of the REF198GRU-REEL7?
The temperature coefficient is 2 ppm/°C for the E grade and up to 10 ppm/°C for the G grade.
- In what package is the REF198GRU-REEL7 available?
The device is available in an 8-lead TSSOP package.
- What are some typical applications of the REF198GRU-REEL7?
Typical applications include portable instruments, ADCs and DACs, smart sensors, solar-powered applications, and automotive systems.
- Does the REF198GRU-REEL7 have short-circuit protection?
Yes, the device includes short-circuit protection.
- Is a capacitor required for proper operation of the REF198GRU-REEL7?
Yes, a 1 μF capacitor is required between the output pin and the GND pin for proper operation.
