 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
A1365LKTTN-2-T Datasheet(PDF) 22 Page - Allegro MicroSystems |
|
||||||||||||||||||||||||||||||
A1365LKTTN-2-T Datasheet(HTML) 22 Page - Allegro MicroSystems |
|
|
22 / 32 page 
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC With High-Bandwidth (120 kHz) Analog Output and Integrated Fault Comparator A1365 22 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Over Magnetic Field Fault During normal operation, the ¯F¯¯A¯¯U¯¯L¯¯T¯ pin is in a high-impedance state. The combination of an internal pull-up resistance with an internal current source enables the ¯F¯¯A¯¯U¯¯L¯¯T¯ pin to be pulled high. After the ¯F¯¯A¯¯U¯¯L¯¯T¯ pin reaches VSAT(HIGH), the current source is shut down. The user could install an external pull-up resistor on the ¯F¯¯A¯¯U¯¯L¯¯T¯ pin to reduce the amount of time required by the ¯F¯¯A¯¯U¯¯L¯¯T¯ pin to reach VSAT(HIGH) after a fault event passes. An external pull-up resistor can be connected to a voltage (VF(PULLUP)) different from VCC as long as it remains within the VF(PULLUP) limits. If VF(PULLUP) is less than VCC, the current provided by the internal current source, IIF(PULLUP), will flow through the external pull-up resistance causing a small voltage drop. The A1365 offers a 6-bit programmable Ratiometric Fault as well as a 2-bit programmable Ratiometric Fault Hysteresis. Figure 17 illustrates the impact of programming 60 mV of Fault Hysteresis on the Fault Switchpoint: • FAULT_THRESH = 0, setting Positive and Negative Field Fault Switchpoint (VFPSP, VFNSP) to the middle of their programmable range. • FAULT_HYST = 2, setting Fault Hysteresis Level to 60 mV. The Fault Switchpoint is not affected by the selected Fault Hysteresis Level. The speed and accuracy with which a fault is triggered are characterized by the Transient Fault Response Time (tTFR), the DC Fault Switchpoint Error (errDFS), and the Fault Delay Due to Load Capacitance (tFDC). Figure 17: Fault Hysteresis Behavior at FAULT_ THRESH = 0, FAULT_HYST = 2 VFHYST VFPSP 3940 4000 VFAULT (V) 5.0 0.1 VOUT (mV) Figure 18: Fault Functional Circuit GND VF(PULLUP) IIF(PULLUP) RIF(PULLUP) VCC RF(PULLUP) VOUT A1365 VCC V+ CBYPASS CL CF (Optional) FAULT Figure 16: Fault Switchpoint Programming Profile 0313263 Max Specified Switchpoint Min Specified Switchpoint Mid Range Fault Switchpoint (V) Specified Fault Switchpoint Range FLT_THRESH |
|
English ▼
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
