INA330AIDGSR

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The INA330AIDGSR is a compact, low power current sensing amplifier specifically designed for monitoring systems with precision current measurements. It operates with two common voltages, supply ranges of ±2.25V to ±18V and a single supply range of 2.25V to 36V allowing for operation in any battery powered system. The amplifier consists of an input voltage sensing stage, an adjustable gain stage, and a low power output stage, which provides the amplifier’s output current measurements.

Application field

The INA330AIDGSR is ideal for applications that require precise current measurements over a wide range of current values. This device is designed for use as an instrumentation amplifier in a wide range of current sensing applications, such as automotive battery monitoring, AC/DC device current sensing, and low-voltage motor current sensing.

Working principle

The INA330AIDGSR consists of a precision current-sensing amplifier and an adjustable gain stage. The amplifier has an input voltage sensing stage that allows for precise current measurement over a wide range of current values. The adjustable gain stage allows the user to select the amount of gain they want the amplifier to apply to their current measurements, allowing for a wide range of current measurements to be made. Additionally, the low power output stage allows the amplifier to output its current readings as an analog voltage or as a direct digital signal.

The input voltage sensing stage of the INA330AIDGSR allows for precise current measurement over a wide range of current values. It consists of a capacitive current-sensing divider and a precision resistor, both of which are connected across the input voltage source. The capacitive current-sensing divider produces an output voltage proportional to the input current, which is then amplified by the adjustable gain stage. The amplified signal is then output from the amplifier in either voltage or digital form.

The adjustable gain stage allows the user to select the desired gain of the amplifier. This stage consists of a voltage transferring transistor and a resistor chain, which are connected to the input voltage source. When the user adjusts the gain of the amplifier, the voltage transferred across the transistor increases or decreases accordingly. This provides the user with a wide range of gain options that can be selected to best suit their current measurements.

The low power output stage allows the amplifier to output its current readings as either an analog voltage or direct digital signal. This stage consists of a low pass filter and an output buffer. The output buffer amplifies the current signal from the low pass filter and then sends it to either an analog or digital output depending on the user’s selection.

Conclusion

The INA330AIDGSR is a low power current sensing amplifier designed for use in a wide range of current sensing applications. With precise current measurement capabilities and adjustable gain, the INA330AIDGSR is the ideal choice for applications requiring precision current measurements over a wide range of current values.

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