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TS12011ITD1022T Datenblatt(PDF) 9 Page - Silicon Laboratories |
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TS12011ITD1022T Datenblatt(HTML) 9 Page - Silicon Laboratories |
9 / 18 page TS12011/TS12012 TS12011/12 Rev. 1.0 Page 9 BLOCK DIAGRAM THEORY OF OPERATION The TS12011 and TS12012 are multi-purpose CMOS building blocks intended for creating analog glue functions around battery-powered uC systems. There is an op amp for signal conditioning, a comparator for detection, and a reference to establish detection threshold levels. It’s possible to build a wide variety of timers, event detectors, regulators, and voltage monitors using these flexible uncommitted blocks. Optimized for low-voltage operation, these devices draw less than 1.6uA total from a 0.8V to 2.5V supply. The op amp and comparator blocks typically continue to function down to less than 0.5V (REFOUT will go into dropout, however). Comparator The comparator block is designed for high gain and chatter-free output switching in noisy environments. The comparator inputs have rail-to-rail VIN range, and exhibit +/-7.5mV of hysteresis. The only difference between the two device types is in the output stage of the comparator. The TS12011 has a push-pull output and latches in the high state. The TS12012 has an open-drain output, latches in the low state, and can tolerate pull-up voltages higher than the supply (up to 5.5V absolute max above VSS/GND). TS12011 push-pull output driver was designed to minimize supply-current surges while driving ±100µA loads with an output swing to within 100mV of the supply rails. The TS12011 and the TS12012 can sink 0.5mA and 1.4mA of current, respectively. The TS12011 can source 0.1mA of current. The non-traditional latch function works to detect and latch changes in the input state. If the LHDET control input is enabled, the output will latch high (low for the TS12012) whenever the differential input voltage is high enough to force a change in that direction. If the differential voltage is in the wrong direction to force a |
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