Overview
The REF198FSZ 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. This design ensures a very low temperature coefficient and high initial accuracy. The device provides a stable output voltage from supplies as low as 100 mV above the output voltage and consumes less than 45 μA of supply current. It also features a sleep mode that reduces the supply current to less than 15 μA when enabled by a low TTL or CMOS level on the SLEEP pin.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | G Grade, IOUT = 0 mA | 4.094 | 4.096 | 4.098 | V |
| Initial Accuracy | G Grade, IOUT = 0 mA | ±2 mV | |||
| Line Regulation | 3.3 V ≤ VS ≤ 15 V, IOUT = 0 mA | 4 | 8 | ppm/V | |
| Load Regulation | VS = 5.0 V, 0 mA ≤ IOUT ≤ 30 mA | 10 | 20 | ppm/mA | |
| Dropout Voltage | VS = 3.8 V, ILOAD = 10 mA | 0.80 | V | ||
| Supply Current | No load | 45 μA | |||
| Supply Current in Sleep Mode | No load | 15 μA | |||
| Operating Temperature Range | -40°C | +85°C | |||
| Package Type | 8-Lead SOIC_N |
Key Features
- Precision Output Voltage: The REF198FSZ provides a precise output voltage of 4.096V with high initial accuracy of ±2 mV.
- Low Dropout Voltage: The device can operate with supplies 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: The device features a low temperature coefficient and high long-term stability, ensuring consistent performance over a wide temperature range.
- Short-Circuit Protection: The REF198FSZ includes short-circuit protection to enhance reliability.
- Extended Industrial Temperature Range: The device is specified over the extended industrial temperature range of -40°C to +85°C and can operate up to +125°C for certain applications.
Applications
- Portable Instruments: Suitable for battery-powered devices due to its low power consumption.
- ADCs and DACs: Used as a reference voltage in analog-to-digital and digital-to-analog converters.
- Smart Sensors: Ideal for precision sensing applications requiring stable reference voltages.
- Solar Powered Applications: Low power consumption makes it suitable for solar-powered systems.
- Loop-Current-Powered Instruments: Can be used in instruments powered by loop currents due to its low dropout voltage and low power consumption.
- Automotive Applications: Specified for use in automotive environments with extended temperature ranges.
Q & A
- What is the output voltage of the REF198FSZ?
The output voltage of the REF198FSZ is 4.096V.
- What is the maximum supply current of the REF198FSZ?
The maximum supply current is less than 45 μA.
- How does the sleep mode affect the supply current?
In sleep mode, the supply current is reduced to less than 15 μA.
- What is the operating temperature range of the REF198FSZ?
The operating temperature range is -40°C to +85°C, with specifications up to +125°C for certain applications.
- What type of package is the REF198FSZ available in?
The REF198FSZ is available in an 8-Lead SOIC_N package.
- What is the dropout voltage of the REF198FSZ?
The dropout voltage is as low as 0.80V at VS = 3.8V and ILOAD = 10mA.
- Does the REF198FSZ have short-circuit protection?
Yes, the REF198FSZ includes short-circuit protection.
- What are some common applications of the REF198FSZ?
Common applications include portable instruments, ADCs and DACs, smart sensors, solar powered applications, and loop-current-powered instruments.
- What is the line regulation of the REF198FSZ?
The line regulation is 4 to 8 ppm/V over the specified voltage range.
- What is the load regulation of the REF198FSZ?
The load regulation is 10 to 20 ppm/mA over the specified current range.
