Overview
The REF195FS from Analog Devices Inc. is a precision micropower, low dropout voltage (LDV) reference IC, part of the REF19x series. This device is designed to provide a highly stable output voltage of 5.0V with exceptional accuracy and low temperature drift. The REF195FS utilizes a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors to achieve its high performance characteristics. It is suitable for various applications requiring precise voltage references, including power management and precision circuitry in industrial, automotive, and medical fields.
Key Specifications
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage | VO | IOUT = 0 mA | 4.95 | 5.00 | 5.05 | V |
| Initial Accuracy (E Grade) | VO | IOUT = 0 mA | 4.99 | 5.00 | 5.01 | V |
| Line Regulation | ΔVO/ΔVIN | 5.15 V ≤ VS ≤ 15 V, IOUT = 0 mA | 5 | 10 | ppm/V | |
| Load Regulation | ΔVO/ΔILOAD | VS = 6.30 V, 0 mA ≤ IOUT ≤ 30 mA | 5 | 10 | ppm/mA | |
| Dropout Voltage | VS - VO | VS = 5.50 V, ILOAD = 10 mA | 0.50 | V | ||
| Supply Current (No Load) | 45 | μA | ||||
| Supply Current (Sleep Mode) | No Load | 15 | μA | |||
| Operating Temperature Range | TA | -40 | 85°C | |||
| Temperature Coefficient (E Grade) | TCVO/°C | IOUT = 0 mA | 2 | 5 ppm/°C |
Key Features
- Fixed Output Voltage: 5.0V with a tolerance of ±0.1%.
- Low Dropout Voltage: Operates with supplies as low as 100 mV above the output voltage.
- Low Noise and High Stability: Ensures minimal distortion and accurate signal transmission.
- Low Power Consumption: Less than 45 μA of supply current in normal operation and less than 15 μA in sleep mode.
- Extended Industrial Temperature Range: Specified over -40°C to +85°C with typical performance up to +125°C.
- Compact Surface-Mount Package: Available in packages such as 8-SOIC.
- Sleep Mode: Output can be turned off by applying a low TTL or CMOS level to the SLEEP pin, reducing supply current).
Applications
- Industrial Control Systems: Where precise voltage references are essential for reliable operation.
- Medical Equipment: High-reliability applications requiring stable and accurate voltage references.
- Automotive Systems: Suitable for the extended industrial temperature range and high reliability requirements).
- Power Management: Ideal for precision circuitry and voltage regulation in various power management systems).
Q & A
- What is the output voltage of the REF195FS?
The output voltage of the REF195FS is 5.0V with a tolerance of ±0.1%.
- What is the typical supply current of the REF195FS?
The typical supply current is less than 45 μA in normal operation and less than 15 μA in sleep mode).
- What is the operating temperature range of the REF195FS?
The REF195FS operates over an extended industrial temperature range of -40°C to +85°C with typical performance up to +125°C).
- How does the sleep mode function in the REF195FS?
The sleep mode can be enabled by applying a low TTL or CMOS level to the SLEEP pin, which turns off the output and reduces the supply current to less than 15 μA).
- What are the key applications of the REF195FS?
The REF195FS is suitable for industrial control systems, medical equipment, automotive systems, and power management applications).
- What is the dropout voltage of the REF195FS?
The dropout voltage is typically 0.50V at VS = 5.50V and ILOAD = 10mA).
- How accurate is the REF195FS in terms of temperature coefficient?
The temperature coefficient for the E Grade is 2 to 5 ppm/°C).
- What is the load regulation of the REF195FS?
The load regulation is typically 5 to 10 ppm/mA for the E Grade).
- Is the REF195FS RoHS compliant?
Yes, the REF195FS is RoHS compliant).
- What package types are available for the REF195FS?
The REF195FS is available in packages such as 8-SOIC).
