Data Sheet

ADA4571

Rev. 0 | Page 17 of 21

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Figure 29. Typical Application Diagram with Separate Processor and Data Conversion

Power Consumption

Worst case quiescent power occurs when the supply current

runs at its specified maximum of 7 mA and the ADA4571 is run

power of 38.5 mW.

ground. The output voltages are protected against short circuit

to the VDD pin or ground by current limitation within the

given time duration. Placing the device 180° rotated into the

socket may lead to damages if the supply current is not limited

to 100 mA.

Offset of Signal Outputs

generated internally on-chip. Offsets originate from matching

inaccuracies and other imperfections during the production

process. For tight tolerances, it is required to match the external

loads for VSIN and VCOS to each other. For ESD and EMC

protection, the outputs contain a series resistance of 50 Ω. The

influence of this series resistance is minimized with a large

output load resistance.

Signal Dependence on Air Gap Distance

The IC measures the direction of the external magnetic field

within its x-y plane. The result is widely independent of the

field strength as long as it is above the specified minimum value

of 25 kA/m. Within a homogeneous field in x-y direction, the

result is independent of its placement in z direction (air gap).

The nominal z distance of the internal x-y plane to the top

surface of the plastic package is 0.400 mm.

ADA4571

EMI

FILTER

EMI

FILTER

+

G = 40

+

–

–

G = 40

DRIVER

DRIVER

AMR BRIDGE

SENSORS

TEMPERATURE SENSOR

BRIDGE DRIVER

BIAS

OSCILLATOR

FAULT DETECTION

VTEMP

GC

VSIN

VCOS

PD

GND

GND

VDD

VDD

Σ-Δ

ADC

MICROPROCESSOR

VDD

Σ-Δ

ADC