Overview
The REF194ES, produced by Analog Devices Inc., is a precision micropower, low dropout voltage (LDV) reference device. 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 optimized for low power consumption, making it suitable for a variety of applications requiring stable voltage references.
Key Specifications
| Parameter | Symbol | Condition | Min | Max | Unit | |
|---|---|---|---|---|---|---|
| Output Voltage | VO | E Grade, IOUT = 0 mA | 4.498 | 4.5 | 4.502 | V |
| Output Voltage | VO | G Grade, IOUT = 0 mA | 4.490 | 4.5 | 4.510 | V |
| Line Regulation | ΔVO/ΔVIN | E Grade, 4.75 V ≤ VS ≤ 15 V, IOUT = 0 mA | 2 | 4 | ppm/V | |
| Load Regulation | ΔVO/ΔILOAD | E Grade, VS = 5.8 V, 0 mA ≤ IOUT ≤ 30 mA | 2 | 4 | ppm/mA | |
| Dropout Voltage | VS - VO | VS = 5.0 V, ILOAD = 10 mA | 0.50 | 1.30 | V | |
| Supply Current | IS | Maximum | 45 μA | μA | ||
| Sleep Mode Current | ISLEEP | Maximum | 15 μA | μA | ||
| Temperature Range | TA | -40°C | +85°C | °C | ||
| Output Current | IOUT | Maximum | 30 mA | mA | ||
| Package | 8-Lead SOIC |
Key Features
- Precision Voltage Reference: The REF194ES offers high initial accuracy with a typical output voltage of 4.5V and a maximum deviation of ±0.04% across different grades.
- Low Dropout Voltage: The device can operate with a supply voltage as low as 100 mV above the output voltage, making it suitable for low-voltage applications.
- Low Power Consumption: 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 long-term stability, ensuring consistent performance over a wide temperature range.
- Short-Circuit Protection: Includes built-in short-circuit protection to enhance reliability and safety.
- Compact Packaging: Available in an 8-lead SOIC package, making it suitable for space-constrained designs).
Applications
- Portable Instruments: Ideal for battery-powered devices due to its low power consumption and high accuracy).
- ADCs and DACs: Used in analog-to-digital and digital-to-analog converters for precise voltage referencing).
- Smart Sensors: Suitable for sensor applications requiring stable and accurate voltage references).
- Solar Powered Applications: Can be used in solar-powered systems due to its low dropout voltage and micropower characteristics).
- Loop-Current-Powered Instruments: Applicable in instruments powered by loop currents, where low power consumption is critical).
- Automotive Applications: Specified over an extended industrial temperature range, making it suitable for automotive and other harsh environment applications).
Q & A
- What is the output voltage of the REF194ES?
The output voltage of the REF194ES is 4.5V with a maximum deviation of ±0.04% across different grades).
- What is the minimum supply voltage required for the REF194ES?
The device can operate with a supply voltage as low as 100 mV above the output voltage).
- How much current does the REF194ES consume in normal operation?
The REF194ES consumes less than 45 μA of supply current in normal operation).
- What is the sleep mode current of the REF194ES?
In sleep mode, the supply current is reduced to less than 15 μA).
- What is the temperature range for the REF194ES?
The device is specified over an extended industrial temperature range of -40°C to +85°C).
- What is the maximum output current of the REF194ES?
The maximum output current is 30 mA).
- What type of package is the REF194ES available in?
The REF194ES is available in an 8-lead SOIC package).
- Does the REF194ES have built-in short-circuit protection?
Yes, the REF194ES includes built-in short-circuit protection).
- What are some common applications of the REF194ES?
Common applications include portable instruments, ADCs and DACs, smart sensors, solar-powered applications, and loop-current-powered instruments).
- Is the REF194ES suitable for automotive applications?
Yes, the device is specified over an extended industrial temperature range, making it suitable for automotive and other harsh environment applications).
