Data Sheet

ADA4571

Rev. 0 | Page 13 of 21

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TERMINOLOGY

Reference Position Error

The reference position error is the absolute mounting position

deviation of the sensor from its nominal placement. The

reference position for Y = 0 μm is the straight connection line of

Pin 2 and Pin 7. The X = 0 μm position is referred to the middle

distance of the package top. The position accuracies are within

a precision of ±0.05 mm (±50 μm) in both the X and Y

direction.

Reference Angle Error

The reference angle error is the absolute mounting rotation

deviation of the sensor from its nominal placement. Marking

the position for angle Φ= 0° position is referred parallel to the

straight connection line of Pin 2 and Pin 7.

Figure 25. Bonding Arrangement and Sensor Alignment in Package

Output Amplitude Synchronism Error

The output amplitude matching error (k) is defined as the

relationship between both output channel amplitudes at

continuously rotating magnetic excitation of the MR sensor

mathematically expressed as

Uncorrected Angular Error

The uncorrected angular error is defined as the maximum

deviation from an ideal angle reading, when calculating the

Single Point Calibration Angular Error

The single point calibration angular error is defined as the

maximum deviation from an ideal angle reading, when

Dynamic Angular Error

The dynamic angular error is defined as the maximum

deviation from an ideal angle reading, when calculating the

taken into account.

Phase Error

dependent error due to bandwidth limitation of the instrumen-

propagation delay, referred to the actual angle direction of the

rotating magnetic field. The typical characteristics value can be

used for a first-order compensation of this error on very high

rotations per minute. For low rotational speed systems, this error

component is negligible and no compensation is necessary.

PD

8

VDD

7

GND

6

VTEMP

5