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LMC6772 Datasheet(PDF) 6 Page - National Semiconductor (TI) |
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LMC6772 Datasheet(HTML) 6 Page - National Semiconductor (TI) |
6 / 11 page Typical Performance Characteristics V+ = 5V, Single Supply, T A = 25˚C unless otherwise specified (Continued) Application Hints 1.0 Input Common-Mode Voltage Range At supply voltages of 2.7V, 5V and 15V, the LMC6772 has an input common-mode voltage range which exceeds both sup- plies. As in the case of operational amplifiers, CMVR is de- fined by the V OS shift of the comparator over the common-mode range of the device. A CMRR ( ∆V OS/∆VCM) of 75 dB (typical) implies a shift of < 1 mV over the entire common-mode range of the device. The absolute maximum input voltage at V + = 5V is 200 mV beyond either supply rail at room temperature. A wide input voltage range means that the comparator can be used to sense signals close to ground and also to the power supplies. This is an extremely useful feature in power supply monitoring circuits. An input common-mode voltage range that exceeds the sup- plies, 20 fA input currents (typical), and a high input imped- ance makes the LMC6772 ideal for sensor applications. The LMC6772 can directly interface to sensors without the use of amplifiers or bias circuits. In circuits with sensors which pro- duce outputs in the tens to hundreds of millivolts, the Response Time for Overdrive (t PHL) DS012347-18 Response Time for Overdrive (t PLH) DS012347-19 Response Time for Overdrive (t PHL) DS012347-20 Response Time for Overdrive (t PLH) DS012347-21 Response Time for Overdrive (t PHL) DS012347-22 Response Time vs Capacitive Load DS012347-23 DS012347-24 FIGURE 1. An Input Signal Exceeds the LMC6772 Power Supply Voltages with No Output Phase Inversion www.national.com 6 |
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