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MAX917ESA Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX917ESA Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 15 page SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference _______________________________________________________________________________________ 9 Pin Description Functional Diagrams MAX917 MAX918 IN+ OUT VCC VEE REF REF 1.245V MAX919 MAX920 IN+ OUT VCC VEE IN- MAX917/MAX918 SO PIN SOT23-5 MAX919/MAX920 SOT23-5 SO N.C. VCC VEE IN- REF IN+ OUT 1, 5, 8 7 4 2 — 3 6 — 5 2 4 — 3 1 — 1, 5, 8 No Connection. Not internally connected. 5 7 Positive Supply Voltage 2 4 Negative Supply Voltage — — Comparator Inverting Input 4 2 1.245V Reference Output and Comparator Inverting Input 3 3 Comparator Noninverting Input 1 6 Comparator Output NAME FUNCTION Detailed Description The MAX917/MAX918 feature an on-board 1.245V ±1.5% reference, yet draw an ultra-low supply current of 750nA. The MAX919/MAX920 (without reference) consume just 380nA of supply current. All four devices are guaranteed to operate down to +1.8V. Their com- mon-mode input voltage range extends 200mV beyond-the-rails. Internal hysteresis ensures clean out- put switching, even with slow-moving input signals. Large internal output drivers allow rail-to-rail output swing with up to ±8mA loads. The output stage employs a unique design that mini- mizes supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. The MAX917/MAX919 have a push-pull output stage that sinks as well as sources current. The MAX918/MAX920 have an open-drain output stage that can be pulled beyond VCC to an absolute maximum of 6V above VEE. These open-drain versions are ideal for implementing wire-ORed output logic functions. Input Stage Circuitry The input common-mode voltage range extends from VEE - 0.2V to VCC + 0.2V. These comparators operate at any differential input voltage within these limits. Input bias current is typically ±0.15nA if the input voltage is between the supply rails. Comparator inputs are pro- tected from overvoltage by internal ESD protection diodes connected to the supply rails. As the input volt- age exceeds the supply rails, these ESD protection diodes become forward biased and begin to conduct. |
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