TI DRV411AIRGPR

Precision Differential Amplifier: Offset and Drift: 100 μV (max), 2 μV/°C (max) System Bandwidth: 200 kHz

Precision Reference: Accuracy: 0.2% (max) Drift: 50 ppm/°C (max) Selectable Pins for 2.5 V, 1.65 V, and Ratiometric Modes Overrange and Error Flags

Power Supply: 2.7 V to 5.5 V Package: 4 mm × 4 mm Quad Flat No-lead Package (QFN) and Thin Shrink Small Outline Package (TSSOP)-20 Temperature Range: -40°C to ±125°C

The DRV411 is designed to condition InSb Hall elements for use within closed-loop current sensor modules. The DRV411 provides a precision excitation circuit for the Hall element to effectively cancel the Hall element's offset and offset-drift. The device also provides a 250 mA 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 nearly doubles the current measurement range compared to traditional single-ended drive methods. The Hall sensor front-end circuit and differential amplifier use patented offset cancellation techniques. These techniques, along with the high-precision voltage reference, significantly improve the accuracy of the entire current sensor module. The output voltage can be selected via pins to support a 2.5 V output when powered by a 5 V supply and a 1.65 V output for 3.3 V sensors.

For optimal thermal performance, the DRV411 is available in thermally enhanced 4 mm x 4 mm QFN and TSSOP-20 packages with PowerPad. The DRV411 operates over the full extended industrial temperature range of -40°C to +125°C.

• Optimized for symmetrical Hall elements (e.g., AKM HW-322, HW-302, or similar)

• Closed-loop current sensor module for DC and AC current measurement