Overview
The REF194GSZ-REEL is a precision micropower, low dropout voltage (LDV) voltage reference IC produced by Analog Devices Inc. This device is part of the REF19x series, known for its high accuracy and stability. It utilizes a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors to achieve a very low temperature coefficient. The REF194GSZ-REEL is designed to provide a stable output voltage from supplies as low as 100 mV above the output voltage, making it suitable for a wide range of applications, including portable instruments, ADCs and DACs, smart sensors, and solar-powered devices.
Key Specifications
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage | VOUT | - | - | 4.5V | - | V |
| Output Voltage Accuracy | - | - | - | ±0.22% | - | % |
| Temperature Coefficient | TCVO | IOUT = 0 mA | 2 | 5 | 10 ppm/°C | ppm/°C |
| Line Regulation | ΔVO/ΔVIN | 4.75 V ≤ VS ≤ 15 V, IOUT = 0 mA | 5 | 10 | 20 ppm/V | ppm/V |
| Load Regulation | ΔVO/ΔILOAD | VS = 5.80 V, 0 mA ≤ IOUT ≤ 25 mA | 5 | 10 | 20 ppm/mA | ppm/mA |
| Dropout Voltage | VS - VO | VS = 5.00 V, ILOAD = 10 mA | 0.80 | - | 1.10 V | V |
| Supply Current | - | No load | - | 45 μA | - | μA |
| Supply Current in Sleep Mode | - | No load | - | 15 μA | - | μA |
| Output Current | - | - | - | - | 30 mA | mA |
| Package Type | - | - | - | - | 8-Lead SOIC | - |
| Temperature Range | - | - | - | - | -40°C to +85°C | °C |
Key Features
- Precision Output Voltage: The REF194GSZ-REEL provides a highly accurate output voltage of 4.5V with an accuracy of ±0.22%.
- Low Dropout Voltage: The device can operate with supplies as low as 100 mV above the output voltage.
- Low Supply Current: It consumes less than 45 μA of supply current and reduces to less than 15 μA in sleep mode.
- High Stability: Features a low temperature coefficient and high initial accuracy due to the patented temperature drift curvature correction circuit and laser trimming of thin-film resistors.
- Short-Circuit Protection: Includes built-in short-circuit protection to ensure device reliability.
- Extended Temperature Range: Specified over the extended industrial temperature range of -40°C to +85°C.
Applications
- Portable Instruments: Ideal for battery-powered devices where low power consumption is critical.
- 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: Can be used in solar-powered systems due to its low dropout voltage and low supply current.
- Loop-Current-Powered Instruments: Applicable in instruments powered by loop currents.
Q & A
- What is the output voltage of the REF194GSZ-REEL?
The output voltage of the REF194GSZ-REEL is 4.5V with an accuracy of ±0.22%. - What is the maximum output current of the REF194GSZ-REEL?
The maximum output current is 30 mA. - What is the supply current of the REF194GSZ-REEL in normal operation?
The supply current is less than 45 μA. - How much does the supply current reduce in sleep mode?
In sleep mode, the supply current reduces to less than 15 μA. - What is the temperature range for the REF194GSZ-REEL?
The device is specified over the extended industrial temperature range of -40°C to +85°C. - What type of package does the REF194GSZ-REEL come in?
The device comes in an 8-Lead SOIC package. - What are some key applications of the REF194GSZ-REEL?
Key applications include portable instruments, ADCs and DACs, smart sensors, solar-powered applications, and loop-current-powered instruments. - Does the REF194GSZ-REEL have short-circuit protection?
Yes, it includes built-in short-circuit protection. - What is the dropout voltage for the REF194GSZ-REEL?
The dropout voltage is typically 0.80 V to 1.10 V depending on the supply and load conditions. - How does the REF194GSZ-REEL achieve high stability?
The device achieves high stability through a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors.
