Overview
The REF194GSZ 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 ensures a very low temperature coefficient and high initial accuracy. The device is particularly suited for applications requiring stable output voltage with minimal power consumption.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage | IOUT = 0 mA | 4.490 | 4.5 | 4.510 | V |
| Input Voltage Range | 4.75 | 15 | V | ||
| Temperature Coefficient (TCVO) | IOUT = 0 mA | 10 | 25 | ppm/°C | |
| Line Regulation | 4.75 V ≤ VS ≤ 15 V, IOUT = 0 mA | 10 | 20 | ppm/V | |
| Load Regulation | VS = 5.0 V, 0 mA ≤ IOUT ≤ 25 mA | 10 | 20 | ppm/mA | |
| Dropout Voltage | VS = 3.8 V, ILOAD = 10 mA | 0.80 | 1.10 | V | |
| Supply Current (No Load) | 45 | μA | |||
| Supply Current (Sleep Mode) | 15 | μA | |||
| Output Current | 30 | mA | |||
| Operating Temperature Range | -40 | 85 | °C |
Key Features
- Precision micropower, low dropout voltage reference with high initial accuracy and low temperature coefficient.
- Stable output voltage from supplies as low as 100 mV above the output voltage.
- Low supply current: 45 μA maximum, and 15 μA in sleep mode.
- High output current capability: up to 30 mA.
- Line and load regulation specifications include the effect of self-heating.
- Short-circuit protection and low dropout voltage.
- Available in an 8-lead SOIC package.
- Extended industrial temperature range: -40°C to +85°C, with typical performance specifications over -40°C to +125°C.
Applications
- Portable instruments.
- ADCs and DACs.
- Smart sensors.
- Solar powered applications.
- Loop-current-powered instruments.
- Automotive applications.
Q & A
- What is the output voltage of the REF194GSZ?
The output voltage of the REF194GSZ is 4.5V with an initial accuracy of ±2 mV maximum.
- What is the input voltage range for the REF194GSZ?
The input voltage range for the REF194GSZ is from 4.75 V to 15 V.
- What is the temperature coefficient of the REF194GSZ?
The temperature coefficient (TCVO) of the REF194GSZ is 10 ppm/°C to 25 ppm/°C.
- How much current does the REF194GSZ consume in normal operation and in sleep mode?
The REF194GSZ consumes less than 45 μA in normal operation and less than 15 μA in sleep mode.
- What is the maximum output current of the REF194GSZ?
The maximum output current of the REF194GSZ is 30 mA.
- What is the operating temperature range of the REF194GSZ?
The operating temperature range of the REF194GSZ is -40°C to +85°C.
- What kind of packaging is available for the REF194GSZ?
The REF194GSZ is available in an 8-lead SOIC package.
- Does the REF194GSZ have any special requirements for operation?
Yes, for proper operation, a 1 μF capacitor is required between the output pin and the GND pin of the device.
- What are some typical applications of the REF194GSZ?
The REF194GSZ is typically used in portable instruments, ADCs and DACs, smart sensors, solar powered applications, and loop-current-powered instruments.
- Is the REF194GSZ suitable for automotive applications?
Yes, the REF194GSZ is specified over the extended industrial temperature range and is suitable for automotive applications.
