Shunt voltage reference

When designing a system for applications ranging from automobiles to simple temperature measurements, interfacing with the analog world typically requ When designing a system for applications ranging from automobiles shunt voltage reference simple temperature measurements, interfacing with the analog world typically requires data converters digital-to-analog and analog-to-digitalsensors, or other application-specific integrated circuits ICs, shunt voltage reference.

There are two types of voltage references, shunt references and series references. Each type has its own usage conditions and the process of selecting between the two can be intimidating. Comparison tables do exist, but they typically provide little insight on how to choose one reference topology over the other for specific applications. This blog series will discuss the applications of both shunt and series references and when to use them, as well as highlight some lesser known use cases for each reference topology. Part 1 - Shunt versus series: Which topology is right for you?

Shunt voltage reference

You can also set the cathode current using the various resistors in series with the supply. This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand Use our reference design selection tool to find designs that best match your application and parameters. Minimize idle power consumption with low-quiescent current I Q shunt voltage references. Low idle power consumption in the power supply can help you design Energy Star-rated appliances and small but reliable power adapters. Our low-I Q shunt voltage references can help your power-supply designs achieve low standby power and longer battery run times, while lowering system costs. Minimize power consumption and extend battery life with our high-accuracy shunt references. Some power supplies, such as those used in servers and industrial instruments, accuracy and stability requirements demand more precise voltage references that can keep the output accurate across changes in input voltage, output load and operating temperature. Our portfolio of high-accuracy, low-temperature coefficient shunt voltage references help enable a more efficient power supply.

The input supply will always see the maximum load current as determined by the input voltage level and the external resistor. When the input voltage is at its maximum and the load current is at its minimum, shunt voltage reference, the current through the shunt reference will be the largest for the application. With these inputs, you shunt voltage reference instantly view the resulting calculations and use the color-coded indications to understand

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There are two types of voltage references, shunt references and series references. Each type has its own usage conditions and the process of selecting between the two can be intimidating. Comparison tables do exist, but they typically provide little insight on how to choose one reference topology over the other for specific applications. This blog series will discuss the applications of both shunt and series references and when to use them, as well as highlight some lesser known use cases for each reference topology. Part 1 - Shunt versus series: Which topology is right for you? The real world is analog for now at least , and the most common way to interface with the real world is to use analog-to-digital converters ADCs , sensors or other application-specific integrated circuits ICs. A voltage-reference IC provides a stable output voltage that can be used as a constant value as system voltage and temperature change. There are two types of voltage references — shunt and series — and each has its own set of strengths and use cases, listed in Table 1.

Shunt voltage reference

In part three of our Understanding Voltage References series, my colleague Marek Lis talked about how to achieve shunt reference flexibility with series reference precision. Figure 1: TLV as a comparator. In a typical adjustable shunt reference application, the output is fed through a resistor divider to the feedback pin, such that the feedback pin is equal to the internal reference voltage during steady state. In the schematic shown in Figure 1 , the TLV adjustable shunt reference is configured for open-loop operation, which means that the output is not connected to the feedback pin. Instead, the signal V X drives the feedback pin through a resistor divider.

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The shunt reference will sink more or less current as the current requirements of the load change. Figure 8 is a schematic of such a series voltage reference. Several factors can affect battery life, but this simple example shows the difference in power consumption between series and shunt voltage-reference operation. Some key pieces of information to know when choosing a voltage reference include:. Comparison tables do exist, but they typically provide little insight on how to choose one reference topology over the other for specific applications. Featured products for high precision. We offer a wide variety of shunt voltage references VREFs for use in precision signal chain and optocoupler flyback converter applications. The input supply will always see the maximum load current as determined by the input voltage level and the external resistor. Figure 7 shows a series voltage reference device that does not require an external resistor. The input supply, V DD , always sees the maximum load current determined by the input-voltage level and external resistor. A typical application for a negative voltage reference is a bipolar data converter, such as a digital-to-analog converter DAC , which requires positive and negative references to generate the full range of possible output voltages. Browse by category. In this example, R S can be any value between 3.

When designing a system for applications ranging from automobiles to simple temperature measurements, interfacing with the analog world typically requ When designing a system for applications ranging from automobiles to simple temperature measurements, interfacing with the analog world typically requires data converters digital-to-analog and analog-to-digital , sensors, or other application-specific integrated circuits ICs. Accurate measurements require a reference voltage that does not fluctuate with system conditions such as input voltage or ambient temperature.

The shunt reference will sink more or less current as the current requirements of the load change. The system input-voltage supply ranges from 12 V to 48 V and the load device draws between 0. Several factors can affect battery life, but this simple example shows the difference in power consumption between series and shunt voltage-reference operation. When selecting a voltage reference for your next application, be sure to keep the typical use cases below in mind. Accurate measurements require a reference voltage that does not fluctuate with system conditions such as input voltage or ambient temperature. The input supply will always see the maximum load current as determined by the input voltage level and the external resistor. Shunt references are flexible because they can create a floating reference voltage not referenced to ground as well as negative references. Voltage reference product overview 3. Which topology is right for you? The output is between the resistor and the ground terminal, and what was the input terminal is now grounded Figure 5. A shunt reference is functionally similar to a Zener diode, where the voltage drop across the device is constant after the device reaches a minimum operating current. Browse by category. The shunt is effectively acting as a current-controlled current sink, where the load current determines the current that the part sinks from the input supply.