Overview
The REF193GS, produced by 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 to achieve a very low temperature coefficient and high initial accuracy. This device is designed to provide a stable output voltage from supplies as low as 100 mV above the output voltage, making it suitable for a wide range of applications where precision and low power consumption are critical.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Initial Accuracy | IOUT = 0 mA | 2.990 | 3.0 | 3.010 | V |
| Temperature Coefficient | IOUT = 0 mA | 10 | - | 25 | ppm/°C |
| Line Regulation | 3.3 V ≤ VS ≤ 15 V, IOUT = 0 mA | 4 | - | 8 | ppm/V |
| Load Regulation | VS = 5.0 V, 0 mA ≤ IOUT ≤ 25 mA | 10 | - | 20 | ppm/mA |
| Dropout Voltage | VS = 3.8 V, ILOAD = 10 mA | 0.80 | - | 1.10 | V |
| Supply Current | No load | - | - | 45 μA | μA |
| Sleep Mode Supply Current | No load | - | - | 15 μA | μA |
| Output Current | - | - | - | 30 mA | mA |
Key Features
- High Precision: The REF193GS features high initial accuracy of ±2 mV maximum and a low temperature coefficient of 5 ppm/°C maximum for the E grade, ensuring stable output voltage across a wide temperature range.
- Low Power Consumption: The device operates with a low supply current of 45 μA maximum and can be put into a sleep mode where the supply current is reduced to less than 15 μA.
- Low Dropout Voltage: It provides stable output voltage from supplies as low as 100 mV above the output voltage.
- High Output Current: Capable of delivering up to 30 mA of output current.
- Line and Load Regulation: Excellent line and load regulation with specifications of 4 ppm/V and 4 ppm/mA respectively.
- Short-Circuit Protection: Built-in short-circuit protection to ensure device reliability.
Applications
- Portable Instruments: Ideal for battery-powered devices where low power consumption is crucial.
- ADCs and DACs: Used as a reference voltage in analog-to-digital and digital-to-analog converters.
- Smart Sensors: Suitable for sensor interfaces requiring precise and stable voltage references.
- Solar Powered Applications: Applicable in solar-powered systems where efficiency and stability are key.
- Loop-Current-Powered Instruments: Used in instruments powered by loop currents, ensuring stable operation.
- Automotive Applications: Specified over the extended industrial temperature range (−40°C to +85°C), making it suitable for automotive applications.
Q & A
- What is the initial accuracy of the REF193GS?
The initial accuracy of the REF193GS is ±2 mV maximum.
- What is the temperature coefficient of the REF193GS?
The temperature coefficient is 5 ppm/°C maximum for the E grade.
- How much supply current does the REF193GS consume?
The device consumes less than 45 μA of supply current and less than 15 μA in sleep mode.
- What is the minimum supply voltage required for the REF193GS?
The device can operate with a supply voltage as low as 100 mV above the output voltage.
- What is the maximum output current of the REF193GS?
The maximum output current is 30 mA.
- Does the REF193GS have short-circuit protection?
Yes, the REF193GS has built-in short-circuit protection.
- What are the typical applications of the REF193GS?
Typical applications include portable instruments, ADCs and DACs, smart sensors, solar powered applications, and loop-current-powered instruments.
- What is the operating temperature range of the REF193GS?
The device is specified over the extended industrial temperature range (−40°C to +85°C) and has typical performance specifications over −40°C to +125°C.
- What package types are available for the REF193GS?
The REF193GS is available in an 8-lead SOIC package.
- Is a capacitor required for proper operation of the REF193GS?
Yes, a 1 μF capacitor is required between the output pin and the GND pin of the device for proper operation.
