LM1815EP Datasheet | National Semiconductor

Description The LM1815EP is an adaptive sense amplifier and default gating circuit for motor control applications. The sense amplifier provides a one-shot pulse output whose leading edge coincides with the negative-going zero crossing of a ground referenced input signal such as from a variable reluctance magnetic pick-up coil. In normal operation, this timing reference signal is processed (delayed) externally and returned to the LM1815EP. A Logic input is then able to select either the timing reference or the processed signal for transmission to the output driver stage. The adaptive sense amplifier operates with a positive-going threshold which is derived by peak detecting the ining signal and dividing this down. Thus the input hysteresis varies with input signal amplitude. This enables the circuit to sense in situations where the high speed noise is greater than the low speed signal amplitude. Minimum input signal is 150m VP-P. ENHANCED PLASTIC - Extended Temperature Performance of - 40°C to +125°C - Baseline Control - Single Fab & Assembly Site - Process Change Notification (PCN) - Qualification & Reliability Data - Solder (Pb Sn) Lead Finish is standard - Enhanced Diminishing Manufacturing Sources (DMS) Support Features Adaptive hysteresis Single supply operation Ground referenced input True zero crossing timing reference Operates from 2V to 12V supply voltage Handles inputs from 100 m VP-P to over 120VP-P with external resistor - CMOS patible logic - - - - - - Applications - Selected Military Applications - Selected Avionics Applications Ordering Information PART NUMBER LM1815MXEP (Note 1, Note 2) VID PART NUMBER V62/04634-01 TBD NS PACKAGE NUMBER (Note 3) M14A TBD Note 1: For the following (Enhanced Plastic) versions, check for availability: LM1815MEP, LM1815NEP. Parts listed with an "X" are provided in Tape & Reel and parts without an "X" are in Rails. Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT:...