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MAX970EEE Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX970EEE Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 12 page Single/Dual/Quad, Micropower, Ultra-Low-Voltage, Rail-to-Rail I/O Comparators _______________________________________________________________________________________ 7 ________________________________________________Pin Descriptions (continued) _______________Detailed Description The MAX965–MAX970 single/dual/quad, micropower, ultra-low-voltage comparators feature Rail-to-Rail® inputs and outputs and an internal 1.235V ±1.5% bandgap reference. These devices operate from a sin- gle +1.6V to +5.5V supply voltage range, and consume less than 5µA supply current per comparator over the extended temperature range. Internal hysteresis is pro- grammable up to ±50mV using two external resistors and the device’s internal reference. The rail-to-rail input common-mode voltage range and the open-drain out- puts allow easy voltage-level conversion for multivolt- age systems. All inputs and outputs can tolerate a continuous short-circuit fault condition to either rail. The MAX965 is a single comparator with adjustable hysteresis and a reference output pin. The MAX966 is a dual comparator without the reference and without adjustable hysteresis. The MAX967 is a dual compara- tor configured as a dual voltage monitor with common hysteresis adjustment and a reference output. The dual MAX968 is similar to the MAX967, but is configured as a window comparator. The MAX969 is a quad com- parator with a common hysteresis adjustment and a ref- erence output pin. The MAX970 is a quad comparator without a reference and without hysteresis adjustment. (See Functional Diagrams and Selector Guide.) Comparator Input The MAX965–MAX970 have a -0.25V to VCC input com- mon-mode range. Both comparator inputs may operate at any differential voltage within the common-mode voltage range, and the comparator displays the correct output logic state. Low-Voltage Operation: VCC Down to 1V The minimum operating voltage is 1.6V. As the supply voltage falls below 1.6V, performance degrades and supply current falls. The reference does not MAX969/MAX970 FUNCTION MAX969 SO 4 4 Comparator A Inverting Input 3 3 Positive Supply Voltage, +1.6V to +5.5V 2 2 Comparator A Open-Drain Output 1 1 Comparator B Open-Drain Output 8 — Internal Reference Output. Typically 1.235V with respect to GND. — — No Connection. Not internally connected. 7 7 Comparator B Noninverting Input 6 6 Comparator B Inverting Input 5 5 Comparator A Noninverting Input MAX970 QSOP 4 3 2 1 — 8, 9 7 6 5 NAME INA- VCC OUTA OUTB REF N.C. INB+ INB- INA+ PIN 9 — — HYST Hysteresis Input. Connect to REF if not used. Input voltage range is from (VREF - 50mV) to VREF. 10 8 10 INC- Comparator C Inverting Input 11 9 11 INC+ Comparator C Noninverting Input 12 10 12 IND- Comparator D Inverting Input 13 11 13 IND+ Comparator D Noninverting Input 14 12 14 GND Ground 15 13 15 OUTD Comparator D Open-Drain Output 16 14 16 OUTC Comparator C Open-Drain Output |
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