as5134 austriamicrosystems, as5134 Datasheet - Page 13

• Manufacturer Part Number: as5134
• Description: 360?programmable High Speed Bldc Magnetic Rotary Encoder
• Manufacturer: austriamicrosystems

AS5134
Data Sheet - D e t a 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 100kΩ. 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.
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VSS
VDD
+5V
100n
CS
AS5134
C2
VSS
VDD
+5V
VSS
PWM
VDD
>=4k7
VDD
VSS
>=1µF
D
D A
A
>=4k7
>=1µF
Revision 1.6
Analog
out
SIN
SINN
COS
COSN
5V
0V
C2
0º
VDD
VSS
180º
100n
360º
Analog out
PWM out
Angle
13 - 29