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AS5134 Datasheet(PDF) 13 Page - ams AG |
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AS5134 Datasheet(HTML) 13 Page - ams AG |
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13 / 29 page  www.austriamicrosystems.com Revision 1.6 13 - 29 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 |
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