Product Details

describe:

Designed for uniaxial magnetic field sensing applications, the DRV425 enables galvanic isolation, high sensitivity, and accurate DC and AC field measurements. The device offers a unique and proprietary integrated fluxgate sensor (IFG) with an internal compensation coil to support a high accuracy sensing range of ±2 mT and measurement bandwidth up to 47 kHz. The low offset, offset drift, and noise of the AO4447A sensor, combined with the precise gain, low gain drift, and extremely low nonlinearity provided by the internal compensation coil, result in unparalleled magnetic field measurement accuracy. The output of the DRV425 is an analog signal proportional to the induced magnetic field.

The DRV425 provides a complete set of features including internal differential amplifiers, on-chip precision references and diagnostics to minimize component count and system-level cost.

The DRV425 is packaged in a thermally enhanced, non-magnetic, thin WQFN package with PowerPAD™ for optimized thermal dissipation and is specified for operation over the extended industrial temperature range of –40°C to +125°C.

characteristic:

●High precision, integrated fluxgate sensor:

—Offset : ±8 μT (max)

—Offset Drift: ±5 nT/°C (typ)

—Gain error: 0.04% (typ.)

— Gain Drift: ±7 ppm/°C (typ.)

—Linearity : ±0.1%

—Noise : 1.5 nT/√ Hz (typ.)

●Sensor range: ±2 mT (max)

— Range and gain adjustable with external resistors

● Selectable bandwidth: 47 kHz or 32 kHz

● Accuracy reference:

—Accuracy : 2% (max), Drift: 50 ppm/°C (max)

— Pin selectable voltage: 2.5 V or 1.65 V

— Selectable ratio mode: VDD/2

● Diagnostic functions: out of range and error flags

●Supply voltage range: 3.0V to 5.5V

parameter:

Feature: Magnetic Field Sensor

Operating temperature range (°C): -40 to 125

Vs (minimum) (V): 3

Interface Type: Analog Voltage

Vs (max) (V): 5.5