Product Details

describe:

The DRV411 is designed to condition InSb Hall elements for use in closed loop current sensor modules. DRV411 provides a precision excitation circuit for the Hall element, effectively eliminating the offset and offset drift of the Hall element. The device also provides a 250mA H-bridge to drive the sensor compensation coil and a precision differential amplifier to generate the output signal. The 250 mA drive capability of the H-bridge approximately doubles the current measurement range compared to traditional single-ended drive methods.

The Hall sensor front-end circuitry and differential amplifier employ proprietary offset cancellation techniques. Together with the high precision voltage reference, these techniques significantly improve the accuracy of the entire ATMEGA1284P-MU current sensor module. The output voltage is pin selectable to support a 2.5V output for a 5V supply and a 1.65V output for a 3.3V sensor.

For optimum heat dissipation, the DRV411 is available in thermally enhanced 4mm × 4mm QFN and TSSOP-20 packages in PowerPAD packages. The DRV411 is rated to operate over the entire extended industrial temperature range of –40°C to +125°C.

characteristic:

●For symmetrical Hall elements

- Optimized (eg AKM HW-322, HW-302 or similar)

●Rotating current Hall sensor excitation

- Eliminates Hall sensor offset and drift

- Eliminate 1/f noise

●Extended current measurement range

— H-bridge drive capability: 250 mA

●Precision difference amplifier:

— Offset and drift: 100 μV (max), 2 μV/°C (max)

- System bandwidth: 200 kHz

●Accuracy reference:

—Accuracy : 0.2% (max)

—Drift : 50 ppm/°C (max)

— Pin selectable for 2.5 V, 1.65 V and ratiometric modes

● Out of range and error flags

●Power supply: 2.7V to 5.5V

●Package: 4mm × 4mm QFN and TSSOP-20 PowerPAD?

●Temperature range: –40°C to +125°C

parameter:

Feature: AFE for Magnetic Current Detection

Operating Temperature Range (°C): -40 to 125

Vs (min) (V): 2.7

Interface Type: Analog Voltage

Vs (max) (V): 5.5