Overview
The REF195ES from 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 to achieve a very low temperature coefficient and high initial accuracy. This device is designed to provide a stable output voltage from supplies as low as 100 mV above the output voltage, making it suitable for a variety of applications requiring low power consumption and high precision.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage | E Grade, IOUT = 0 mA | 4.998 | 5.0 | 5.002 | V |
| Initial Accuracy | E Grade, IOUT = 0 mA | ±2 mV | |||
| Supply Current | No load | 45 μA | μA | ||
| Supply Current (Sleep Mode) | No load | 15 μA | μA | ||
| Line Regulation | E Grade, 5.10 V ≤ VS ≤ 15 V, IOUT = 0 mA | 2 | 4 ppm/V | ppm/V | |
| Load Regulation | E Grade, VS = 5.0 V, 0 mA ≤ IOUT ≤ 30 mA | 2 | 4 ppm/mA | ppm/mA | |
| Dropout Voltage | VS = 3.5 V, ILOAD = 10 mA | 1.00 V | V | ||
| Temperature Coefficient | E Grade, IOUT = 0 mA | 2 ppm/°C | ppm/°C | ||
| Operating Temperature Range | -40°C | +85°C | °C | ||
| Package | 8-Lead SOIC |
Key Features
- Precision Output Voltage: The REF195ES offers high initial accuracy with an output voltage of 5.0V and an initial accuracy of ±2 mV.
- Low Dropout Voltage: The device can operate with supplies as low as 100 mV above the output voltage.
- Low Power Consumption: It consumes less than 45 μA of supply current and reduces to less than 15 μA in sleep mode.
- High Stability: Utilizes a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors.
- Low Temperature Coefficient: Achieves a very low temperature coefficient, ensuring stable output over a wide temperature range.
- Short-Circuit Protection: Includes built-in short-circuit protection for enhanced reliability.
- Extended Industrial Temperature Range: Specified over -40°C to +85°C with typical performance up to +125°C.
Applications
- Portable Instruments: Ideal for battery-powered devices due to its low power consumption.
- ADCs and DACs: Provides a stable reference voltage for analog-to-digital and digital-to-analog converters.
- Smart Sensors: Suitable for sensor applications requiring high precision and low power.
- Solar Powered Applications: Can be used in solar-powered systems where low power consumption is critical.
- Loop-Current-Powered Instruments: Applicable in instruments powered by loop currents.
- Automotive Applications: Meets the requirements for automotive applications with its extended temperature range.
Q & A
- What is the output voltage of the REF195ES? The output voltage of the REF195ES is 5.0V with an initial accuracy of ±2 mV.
- How much supply current does the REF195ES consume? The REF195ES consumes less than 45 μA of supply current and reduces to less than 15 μA in sleep mode.
- What is the operating temperature range of the REF195ES? The operating temperature range is -40°C to +85°C, with typical performance up to +125°C.
- What package options are available for the REF195ES? The REF195ES is available in an 8-Lead SOIC package.
- Does the REF195ES have short-circuit protection? Yes, the REF195ES includes built-in short-circuit protection.
- What are some typical applications of the REF195ES? Typical applications include portable instruments, ADCs and DACs, smart sensors, solar powered applications, and loop-current-powered instruments.
- How does the sleep mode function in the REF195ES? In sleep mode, the output is turned off and the supply current is reduced to less than 15 μA by applying a low TTL or CMOS level to the SLEEP pin.
- What is the dropout voltage of the REF195ES? The dropout voltage is 1.00 V at VS = 3.5 V and ILOAD = 10 mA.
- What is the temperature coefficient of the REF195ES? The temperature coefficient is 2 ppm/°C for the E Grade.
- Is a capacitor required for proper operation of the REF195ES? Yes, a 1 μF capacitor is required between the output pin and the GND pin for proper operation.
