The TLE5014 angle sensors typically draw 25 milliamps (mA) from supply voltages of up to 26 volts (absolute maximum) and meet ISO 26262 ASIL-C for the single die and ISO 26262 ASIL-D for the dual die versions.
Key performance parameters
To fully realize the ability of angle sensors to reduce audible noise and optimize motor smoothness and torque, designers should carefully consider the key parameters: accuracy, speed, latency, axial misalignment, and magnet drift. For example, high-accuracy readouts are crucial for automotive and industrial environments, despite harsh environmental conditions. That makes factors like thermal stability and air gap tolerance vital in an angle sensor's ability to meet accuracy objectives without adding cost and complexity to the system design. To meet such requirements at minimal cost, Monolithic Power Systems’ MagAlpha magnetic position sensors—MA302GQ-P, MA702GQ-P/Z, and MA730GQ-Z— can be mounted on the edge of the board for both end-of-shaft and side-shaft (off-axis) configurations.
Figure 6: The contactless MagAlpha MA730GQ-Z features 14-bit resolution and provides digital readouts over the SPI link. (Image source: Monolithic Power Systems)
For speed, the contactless sensing and 12-bit resolution absolute angle encoder allow MA302 sensors to provide accurate angle measurement from 0 rpm to 60,000 rpm. The MagAlpha MA730GQ-Z features 14-bit resolution and provides digital readouts over the SPI link (Figure 6). However, for slow operations like human-machine interface (HMI) or manual controls where the rotating speed remains below 200 rpm, the company offers the MagAlpha MA800, a digital magnetic sensor designed to replace analog potentiometers or rotary switches. It’s used with a
diametrically magnetized cylinder of 2 millimeters (mm) to 8 mm, and its magnet configurations and shapes are flexible. The MA800 has lower resolution (8 bits) but does feature on- chip non-volatile memory and programmable magnetic field strength thresholds. These make it suitable for applications that require the implementation of push-button readouts via register bits as well as output signals.
we get technical
55
Powered by FlippingBook