LMC6772AIM NSC [National Semiconductor], LMC6772AIM Datasheet - Page 6

• Manufacturer Part Number: LMC6772AIM
• Description: Dual Micropower Rail-To-Rail Input CMOS Comparator with Open Drain Output
• Manufacturer: NSC [National Semiconductor]

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Typical Performance Characteristics
specified (Continued)
Response Time
for Overdrive (t
Response Time for
Overdrive (t
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
common-mode range of the device. A CMRR ( V
of 75 dB (typical) implies a shift of
common-mode range of the device. The absolute maximum
input voltage at V
at room temperature.
PLH
)
PHL
+
OS
= 5V is 200 mV beyond either supply rail
)
shift of the comparator over the
DS012347-18
DS012347-21
<
1 mV over the entire
Response Time
for Overdrive (t
Response Time for
Overdrive (t
OS
/ V
CM
PHL
)
)
PLH
V
6
+
)
= 5V, Single Supply, T
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
FIGURE 1. An Input Signal Exceeds the LMC6772
DS012347-19
Power Supply Voltages with No Output Phase
DS012347-22
Response Time
for Overdrive (t
Response Time vs
Capacitive Load
A
= 25˚C unless otherwise
Inversion
PHL
)
DS012347-24
DS012347-20
DS012347-23