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MAX992EKA-T Datasheet(PDF) 10 Page - Maxim Integrated Products |
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MAX992EKA-T Datasheet(HTML) 10 Page - Maxim Integrated Products |
10 / 13 page High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators 10 ______________________________________________________________________________________ Zero-Crossing Detector Figure 3 shows a zero-crossing detector application. The MAX987’s inverting input is connected to ground, and its noninverting input is connected to a 100mVp-p signal source. As the signal at the noninverting input crosses 0V, the comparator’s output changes state. Logic-Level Translator Figure 4 shows an application that converts 5V logic lev- els to 3V logic levels. The MAX988 is powered by the +5V supply voltage, and the pullup resistor for the MAX988’s open-drain output is connected to the +3V supply volt- age. This configuration allows the full 5V logic swing with- out creating overvoltage on the 3V logic inputs. For 3V to 5V logic-level translation, simply connect the +3V supply to VCC and the +5V supply to the pullup resistor. MAX987 IN+ 4 3 OUT 1 2 5 VCC 100mV VCC VEE IN- 0.1µF MAX988 IN- 100kΩ 100kΩ 4 3 RPULLUP 3V (5V) LOGIC OUT OUT 1 5 2 VCC +5V (+3V) +3V (+5V) VEE 5V (3V) LOGIC IN IN+ 0.1µF Figure 3. Zero-Crossing Detector Figure 4. Logic-Level Translator Pin Configurations (continued) 14 13 12 11 10 9 8 1 2 3 4 5 6 7 OUTD IND- IND+ VEE VCC INA+ INA- OUTA MAX995 MAX996 INC+ INC- OUTC OUTB INB- INB+ SO/TSSOP OUT N.C. VEE 1 2 8 7 N.C. VCC IN- IN+ N.C. SO TOP VIEW 3 4 6 5 MAX987 MAX988 INB- INB+ VEE 1 2 8 7 VCC OUTB INA- INA+ OUTA SO/µMAX/SOT23 3 4 6 5 MAX991 MAX992 |
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