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LMV762MAX Datasheet(PDF) 10 Page - Texas Instruments |
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LMV762MAX Datasheet(HTML) 10 Page - Texas Instruments |
10 / 20 page VO 0 VIN2 VIN1 VIN LMV761, LMV762 SNOS998H – FEBRUARY 2002 – REVISED MARCH 2013 www.ti.com Figure 25. Non-Inverting Comparator Configuration INPUT The LMV761/LMV762 have near zero input bias current. This allows very high resistance circuits to be used without any concern for matching input resistances. This also allows the use of very small capacitors in R-C type timing circuits. This reduces the cost of the capacitors and amount of board space used. SHUTDOWN MODE The LMV761 features a low-power shutdown pin that is activated by driving SD low. In shutdown mode, the output is in a high impedance state, supply current is reduced to 20nA and the comparator is disabled. Driving SD high will turn the comparator on. The SD pin should not be left unconnected due to the fact that it is a high impedance input. When left unconnected, the output will be at an unknown voltage. Also do not three-state the SD pin. The maximum input voltage for SD is 5.5V, referred to ground and is not limited by VCC. This allows the use of 5V logic to drive SD while VCC operates at a lower voltage, such as 3V. The logic threshold limits for SD are proportional to VCC. BOARD LAYOUT AND BYPASSING The LMV761/LMV762 is designed to be stable and oscillation free, but it is still important to include the proper bypass capacitors and ground pickups. Ceramic 0.1 μF capacitors should be placed at both supplies to provide clean switching. Minimize the length of signal traces to reduce stray capacitance. 10 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: LMV761 LMV762 |
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