REF194ES Allicdata Electronics
Allicdata Part #:

REF194ES-ND

Manufacturer Part#:

REF194ES

Price: $ 0.00
Product Category:

Integrated Circuits (ICs)

Manufacturer: Analog Devices Inc.
Short Description: IC VREF SERIES 4.5V 8SOIC
More Detail: Series Voltage Reference IC ±0.04% 30mA 8-SOIC
DataSheet: REF194ES datasheetREF194ES Datasheet/PDF
Quantity: 1000
Stock 1000Can Ship Immediately
Specifications
Noise - 0.1Hz to 10Hz: 45µVp-p
Base Part Number: REF194
Supplier Device Package: 8-SOIC
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Operating Temperature: -40°C ~ 85°C (TA)
Current - Supply: 45µA
Voltage - Input: 4.75 V ~ 15 V
Noise - 10Hz to 10kHz: --
Series: REF19
Temperature Coefficient: 5ppm/°C
Tolerance: ±0.04%
Current - Output: 30mA
Voltage - Output (Min/Fixed): 4.5V
Output Type: Fixed
Reference Type: Series
Part Status: Obsolete
Packaging: Tube 
Description

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Voltage references are essential components of power management integrated circuits (PMIC). They provide a stable reference voltage for analog and digital circuits, enabling precise level shifting and linear regulation. The REF194ES is a PMIC voltage reference designed for applications requiring low drift and tight tolerance over the industrial temperature range. It integrates a low drop-out (LDO) regulator and controlled-temperature buffer to provide superior performance in demanding industrial power applications.

The REF194ES has a wide range of applications in industrial, automotive, and medical systems, as well as power measurement and data acquisition systems. It can be used for precise level shifting, supply sequencing, and precise regulation of power supplies. It is also often used in test and measurement applications, such as calibration systems and automated test equipment. In addition, it is used in closed-loop servo systems where a precise reference voltage is needed.

The REF194ES is a low drop-out voltage regulator with a wide input voltage range of 2.7V to 20V. It integrates a low drop-out (LDO) voltage regulator and a temperature-controlled buffer to provide superior performance in demanding industrial power applications. The REF194ES operates over the industrial temperature range of -40°C to +125°C, and is rated for 2.5V. It is designed to satisfy high accuracy and low drift requirements in industrial and medical systems where precision is critical.

The REF194ES has a precision Voltage Reference that is designed for low drift and tight tolerance over the industrial temperature range. It is designed to provide a stable voltage source by effectively reducing the amount of variation in output voltage caused by changes in temperature and/or load. The stability of the output voltage is maintained by a combination of the reference design and precision temperature controlling circuit. The output voltage is buffered by a bipolar operational amplifier, which is controlled by a temperature sensing circuit. The temperature sensing circuit detects the changes in temperature and adjusts the buffer accordingly to maintain the regulated voltage.

The reference design of the REF194ES provides high accuracy and low drift over time. It uses a resistor divider to produce a precise output voltage, which is then buffered by a bipolar operational amplifier. The amplifier\'s output is compared to the reference voltage, and the control bias is adjusted accordingly to control the output voltage. The resistor divider consists of two, 4.7kΩ, 0.1% precision, wire-wound resistors. The reference output is also temperature-compensated to reduce the effect of thermal drift, ensuring accuracy over the extended operating temperature range.

The REF194ES also provides protection against over-temperature, over-voltage, short-circuit, and reverse polarity. It features an on-chip thermal sensing circuit that automatically shuts down the output if the temperature exceeds its maximum rating. It also features a low EMI filter that reduces electromagnetic interference, allowing the device to be used near sensitive analog circuits. In addition, it has a Reverse Polarity Protection (RPP) feature that prevents damage in the event of reverse polarity.

Overall, the REF194ES is an excellent choice for applications requiring low drift and tight tolerance over the industrial temperature range. It offers a wide range of features and protections, tailored to satisfy the needs of precision industrial and medical systems. Its combination of low drop-out voltage regulator, controlled-temperature buffer, and a precision voltage reference make it an ideal solution for industrial, automotive, and medical systems.

The specific data is subject to PDF, and the above content is for reference

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