AS5715A Datasheet | ams

Description 1 General Description The AS5715A/AS5715R is an inductive sensor IC with differential SIN/COS output for high speed position sensing applications. To fulfill its purpose, the AS5715A/AS5715R device has to be connected to a coil system. The coil system consists of a TX (transmitting) and two RX (receiving) coils typically integrated on a PCB (Printed Circuit Board). The device excites the TX coil with a high frequency voltage. A target above the coil system effects the amount of voltage induced into the RX coils depending on the position of the target. The device senses, demodulates, and amplifies this voltage. If the coil system is designed properly, then the device output delivers SIN and COS shaped voltages. An ECU (Electronic Control Unit) can calculate the target position by applying an atan2() function to the SIN and COS output signal. The AS5715A/AS5715R is defined as SEoo C (Safety Element out of Context) according ISO26262. Key Benefits & Features The benefits and features of AS5715R, On-/Off-Axis Inductive Position Sensor with Sin/Cos Output, are listed below: Figure 1: Added Value of Using AS5715R Features Benefits On and off axis applications Flexible PCB design possible. Enabling hollow shaft and side shaft applications. Adaptable coil system layout Adaptable to the pole pair count of the motor Typical accuracy with 4 pole-pair configuration: Low torque ripple and motor noise and increased <0.075 deg mechanical, <0.3 deg electrical efficiency Suitable for high speed applications 3.3 µs propagation delay and output bandwidth for applications up to 480000 rpm Differential SIN and COS output Easy replacement of existing AMR/GMR sensors Functional safety diagnostics ASIL C(D) as SEoo C Suitable for automotive applications AEC-Q100 Grade 0 qualified up to -40 °C to 160 °C Applications - BLDC motor control - Traction motors for electric vehicles - Electric power steering - PUBLIC DS000511 - v5-00 -...