Overview
The REF191ESZ-REEL is a precision micropower, low dropout voltage reference IC produced by Analog Devices Inc. This component is part of the REF19x series, which is known for its high initial accuracy and low temperature coefficient. The REF191ESZ-REEL provides a stable output voltage of 2.048V with a tolerance of ±0.1% and is designed to operate from supplies as low as 100 mV above the output voltage. It features a low supply current of less than 45 μA and can be put into a sleep mode, reducing the supply current to less than 15 μA.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage | IOUT = 0 mA | 2.046 | 2.048 | 2.050 | V |
| Supply Current | Active Mode | - | - | 45 μA | - |
| Supply Current (Sleep Mode) | SLEEP Pin Low | - | - | 15 μA | - |
| Line Regulation | 3.0 V ≤ VS ≤ 15 V, IOUT = 0 mA | 2 | - | 4 ppm/V | - |
| Load Regulation | VS = 5.0 V, 0 mA ≤ IOUT ≤ 25 mA | - | - | 4 ppm/mA | - |
| Temperature Coefficient | -40°C to +85°C | 2 | - | 5 ppm/°C | - |
| Maximum Output Current | - | - | - | 30 mA | - |
| Operating Temperature Range | - | -40°C | - | +85°C | - |
| Package Type | - | - | - | 8-Lead SOIC | - |
Key Features
- Precision Output Voltage: The REF191ESZ-REEL provides a highly accurate output voltage of 2.048V with a tolerance of ±0.1%.
- 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 Supply Current: The component consumes less than 45 μA of supply current in active mode and less than 15 μA in sleep mode.
- High Stability: The REF19x series uses a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors to achieve a very low temperature coefficient.
- Short-Circuit Protection: The device includes short-circuit protection to ensure reliability in various operating conditions.
- Extended Industrial Temperature Range: The component is specified over the extended industrial temperature range of −40°C to +85°C, with typical performance specifications up to +125°C.
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 applications requiring high accuracy and low power consumption.
- Solar Powered Applications: Can be used in systems powered by solar energy due to its low dropout voltage and low supply current.
- Loop-Current-Powered Instruments: Suitable for instruments powered by loop currents.
- Automotive Applications: Can be used in automotive systems due to its extended temperature range and high reliability.
Q & A
- What is the output voltage of the REF191ESZ-REEL?
The output voltage of the REF191ESZ-REEL is 2.048V with a tolerance of ±0.1%.
- What is the maximum supply current of the REF191ESZ-REEL in active mode?
The maximum supply current in active mode is less than 45 μA.
- How does the sleep mode affect the supply current of the REF191ESZ-REEL?
In sleep mode, the supply current is reduced to less than 15 μA.
- What is the operating temperature range of the REF191ESZ-REEL?
The operating temperature range is −40°C to +85°C, with typical performance specifications up to +125°C.
- What package type is the REF191ESZ-REEL available in?
The REF191ESZ-REEL is available in an 8-Lead SOIC package.
- What are some common applications of the REF191ESZ-REEL?
Common applications include portable instruments, ADCs and DACs, smart sensors, solar powered applications, loop-current-powered instruments, and automotive systems.
- How does the REF191ESZ-REEL achieve high stability?
The device uses a patented temperature drift curvature correction circuit and laser trimming of highly stable, thin-film resistors to achieve high stability.
- Does the REF191ESZ-REEL have short-circuit protection?
Yes, the REF191ESZ-REEL includes short-circuit protection.
- What is the maximum output current of the REF191ESZ-REEL?
The maximum output current is 30 mA.
- How does the line regulation of the REF191ESZ-REEL perform?
The line regulation is 2 to 4 ppm/V over the specified voltage range.
