Which is an amplifier for high side current sensing?

Which is an amplifier for high side current sensing?

High-side current sensing is a pervasive requirement in automotive, telecom, consumer, and industrial applications. Integrated high-voltage difference- and current-sense amplifiers are now offered in the marketplace to perform this function.

Why are current sensors used in high voltage applications?

Our current sensor devices of larger inner diameter make possible high voltage current measurement without the risk of voltage breakdown. Several of our current transformer models feature double shielding for greater noise immunity and increased safety in high voltage applications.

Why do we need high side current sensing?

In motor-control configurations (Figures 2 and 3), placing the shunt on the motor phase means that current in the shunt resistor could flow both ways; therefore, a bidirectional current sensor is necessary. The designer who studies the choices for the high-side current-sensing function will find a variety of options from many semiconductor vendors.

What kind of instruments can a wideband monitor be connected to?

They can be connected to oscilloscopes, spectrum analyzers, power analyzers, digital voltmeters, analog-to-digital convertors, and a variety of other measuring instruments. HoleId. Max. Curr. Time (nsec.) IT Max. Max. Curr.

How are high side shunts used in motor control?

High-side shunt in typical solenoid control. Figure 2. High-side shunt in H-bridge motor control. Figure 3. High-side shunts in 3-phase motor control. In all configurations shown above, the pulse-width-modulated (PWM) common-mode voltage at the shunt resistor—which monitors the load current—is swinging over the whole range from ground to battery.

Which is difference amplifier withstands 65 V?

The AD8206 (Figure 4), an integrated high-voltage difference amplifier, withstands common-mode voltages up to 65 V by using input resistors to attenuate the input voltage by 16.7:1 so as to keep the common-mode voltage within the input range of amplifier A1.

How does a high side current measurement work?

A high side current measurement inserts the current shunt resistor between the power source and the active load as shown in Figure 3, using a Texas Instruments INA240 current sense amplifier as an AFE. This device’s common mode input voltage can greatly exceed its supply voltage, making it a good choice for high side current measurements.

How big is the gain of a current sense amplifier?

A current sense amplifier is a specialized op amp with an added laser trimmed, precision resistor network incorporated into the device to set its gain. Typically, amplifier voltage gains are on the order of 20 to 60, and sometimes even larger. The current sense amplifier may or may not include the current shunt resistor in the same package.

Which is an example of a high side current sense?

High-side current sense. The circuit in Figure 1 shows a typical example of high-side current sense. Negative feedback tries to force the voltage V SENSE upon gain resistor R GAIN. The current through R GAIN flows through P-channel MOSFET (PMOS) to resistor R OUT, which develops a ground referenced output voltage.