Overview
The REF198GS from Analog Devices Inc. is a precision micropower, low dropout voltage reference. This device 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. The REF198GS is designed to provide a stable output voltage of 4.096V, making it suitable for a variety of applications requiring precise voltage referencing.
Key Specifications
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage | VOUT | - | - | 4.096 | - | V |
| Initial Accuracy | - | - | - | ±2 | mV | |
| Temperature Coefficient | TCVO | IOUT = 0 mA | 2 | 5 | ppm/°C | |
| Supply Current | ISUPPLY | No load | - | 45 | μA | |
| Sleep Mode Current | ISLEEP | No load | - | 15 | μA | |
| Output Current | IOUT | - | - | 30 | mA | |
| Dropout Voltage | VS - VO | VS = 3.3 V, ILOAD = 10 mA | - | 1.25 | V | |
| Line Regulation | ΔVO/ΔVIN | 3.0 V ≤ VS ≤ 15 V, IOUT = 0 mA | 5 | 10 | ppm/V | |
| Load Regulation | ΔVO/ΔILOAD | VS = 5.0 V, 0 mA ≤ IOUT ≤ 25 mA | 5 | 15 | ppm/mA | |
| Operating Temperature | TA | - | -40 | 85 | °C | |
| Package | - | - | - | 8-SOIC | - |
Key Features
- Precision output voltage of 4.096V with high initial accuracy (±2 mV max)
- Low temperature coefficient (5 ppm/°C max for E Grade)
- Low supply current (45 μA max) and sleep mode current (15 μA max)
- High output current capability (30 mA)
- Low dropout voltage, allowing operation from supplies as low as 100 mV above the output voltage
- Line and load regulation specifications include the effect of self-heating
- Extended industrial temperature range (-40°C to +85°C)
- Sleep mode enabled by applying a low TTL or CMOS level to the SLEEP pin
Applications
The REF198GS is suitable for various applications requiring precise voltage referencing, including:
- Automotive systems
- Industrial control systems
- Medical devices
- Telecommunications equipment
- High-precision measurement and instrumentation
Q & A
- What is the output voltage of the REF198GS?
The output voltage of the REF198GS is 4.096V. - What is the initial accuracy of the REF198GS?
The initial accuracy of the REF198GS is ±2 mV max. - What is the temperature coefficient of the REF198GS?
The temperature coefficient of the REF198GS is 5 ppm/°C max for the E Grade. - How much current does the REF198GS consume in normal operation and sleep mode?
The REF198GS consumes a maximum of 45 μA in normal operation and 15 μA in sleep mode. - What is the maximum output current of the REF198GS?
The maximum output current of the REF198GS is 30 mA. - What is the dropout voltage of the REF198GS?
The dropout voltage of the REF198GS is as low as 1.25 V at VS = 3.3 V and ILOAD = 10 mA. - What is the operating temperature range of the REF198GS?
The operating temperature range of the REF198GS is -40°C to +85°C. - How is the sleep mode enabled on the REF198GS?
The sleep mode is enabled by applying a low TTL or CMOS level to the SLEEP pin. - What package type is the REF198GS available in?
The REF198GS is available in an 8-SOIC package. - What are some typical applications of the REF198GS?
The REF198GS is typically used in automotive systems, industrial control systems, medical devices, telecommunications equipment, and high-precision measurement and instrumentation.
