Overview
The REF191GSZ is a precision micropower, low dropout voltage reference from Analog Devices Inc. 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. This technology ensures a very low temperature coefficient and high initial accuracy. The REF191GSZ is designed to provide a stable output voltage of 2.048V from supplies as low as 100 mV above the output voltage, making it suitable for a variety of applications requiring precise voltage referencing.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Nominal Output Voltage | 2.048V | V |
| Initial Accuracy | ±2 mV Max | mV |
| Temperature Coefficient | 5 ppm/°C Max | ppm/°C |
| Supply Current | 45 μA Max | μA |
| Sleep Mode Supply Current | 15 μA Max | μA |
| Output Current | 30 mA | mA |
| Dropout Voltage | 1.00 V (VS = 3.5 V, ILOAD = 10 mA) | V |
| Line Regulation | 4 ppm/V | ppm/V |
| Load Regulation | 4 ppm/mA | ppm/mA |
| Operating Temperature Range | −40°C to 85°C | °C |
| Package Type | 8-lead SOIC-N | |
| Mounting Type | Surface Mount |
Key Features
- High accuracy fixed voltage output of 2.048V with an initial accuracy of ±2 mV max.
- Low temperature coefficient of 5 ppm/°C max.
- Low output noise and excellent long-term stability and reliability.
- Low dropout voltage, allowing stable output from supplies as low as 100 mV above the output voltage.
- Wide input voltage range of 3 V to 15 V.
- Tight tolerance of ±0.5%.
- Stable output current of up to 30 mA.
- Low supply current of 45 μA max and reduced to 15 μA in sleep mode.
- Short-circuit protection and robust operation from −40°C to 85°C.
Applications
- Portable instruments.
- Analog-to-Digital Converters (ADCs) and Digital-to-Analog Converters (DACs).
- Smart sensors.
- Solar-powered applications.
- Loop-current-powered instruments.
- Automotive applications requiring precise voltage referencing over an extended industrial temperature range.
Q & A
- What is the nominal output voltage of the REF191GSZ?
The nominal output voltage of the REF191GSZ is 2.048V.
- What is the temperature coefficient of the REF191GSZ?
The temperature coefficient of the REF191GSZ is 5 ppm/°C max.
- How much supply current does the REF191GSZ consume?
The REF191GSZ consumes less than 45 μA of supply current and reduces to less than 15 μA in sleep mode.
- What is the maximum output current of the REF191GSZ?
The maximum output current of the REF191GSZ is 30 mA.
- What is the operating temperature range of the REF191GSZ?
The operating temperature range of the REF191GSZ is −40°C to 85°C.
- What type of package does the REF191GSZ come in?
The REF191GSZ comes in an 8-lead SOIC-N package.
- Does the REF191GSZ have short-circuit protection?
Yes, the REF191GSZ has short-circuit protection.
- What are some typical applications of the REF191GSZ?
Typical applications include portable instruments, ADCs and DACs, smart sensors, solar-powered applications, and loop-current-powered instruments.
- How do you enable sleep mode on the REF191GSZ?
Sleep mode is enabled by applying a low TTL or CMOS level to the SLEEP pin.
- Is the REF191GSZ RoHS compliant?
Yes, the REF191GSZ is lead-free and RoHS compliant.
