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AS5134

Data Sheet - D e ta i l e d D e s c r i p t i o n

Figure 8. Data Transmission with Pulse Width Modulated (PWM) Output

Analog Sin/Cos Outputs with External Interpolator

By connecting C1 to VDD, the AS5134 provides analog Sine and Cosine outputs (Sin, Cos) of the Hall array front-end

for test purposes. These outputs allow the user to perform the angle calculation by an external ADC + µC, e.g. to

compute the angle with a high resolution. In addition, the inverted Sine and Cosine signals (SINN, COSN; see dotted

lines) are available for differential signal transmission.

The input resistance of the receiving amplifier or ADC should be greater than 100k

Ω. The signal lines should be kept

as short as possible, longer lines should be shielded in order to achieve best noise performance.

The SIN / COS / SINN / COSN signals are amplitude controlled to ~1.3Vpp (differential) by the internal AGC controller.

The DC bias voltage is ~2.25V.

Note: These outputs are high impedance and not resilient, (Load max. 10µA).

Figure 9. Sine and Cosine Outputs for External Angle Calculation

Quadrature A/B/Index Output

The phase shift between channel A and B indicates the direction of the magnet movement. Channel A leads channel B

at a clockwise rotation of the magnet (top view) by 90 electrical degrees. Channel B leads channel A at a counter-

clockwise rotation.

+5V

VDD

AS5134

VDD

PWM

VSS

C2

CS

100n

>=4k7

>=4k7

>=1µF

>=1µF

Analog

out

VSS

5V

0V

0º

180º

360º

Analog out

PWM out

Angle

+5V

VDD

VDD

SIN

SINN

VSS

VSS

C2

100n

VSS

VDD

A

D

DA

COS

COSN