lmc6582 National Semiconductor Corporation, lmc6582 Datasheet - Page 10

• Manufacturer Part Number: lmc6582
• Description: Low Voltage, Rail-to-rail Input And Output Cmos Operational Amplifier
• Manufacturer: National Semiconductor Corporation

www.national.com
Typical Performance Characteristics
specified. (Continued)
Stability vs
Capacitive Load
Application Information
1.0 Input Common-Mode Voltage
Range
The LMC6582/4 has a rail-to-rail input common-mode volt-
age range. Figure 1 shows an input voltage exceeding both
supplies with no resulting phase inversion on the output.
The absolute maximum input voltage at V
beyond either supply rail at room temperature. Voltages
greatly exceeding this absolute maximum rating, as in Figure
2 , can cause excessive current to flow in or out of the input
pins, possibly affecting reliability. The input current can be
externally limited to
in Figure 3 .
FIGURE 1. An Input Signal Exceeds the LMC6582
Power Supply Voltages with No Output Phase
±
5 mA, with an input resistor, as shown
Inversion
DS012041-53
+
DS012041-3
= 3V is 300 mV
Stability vs
Capacitive Load
V
10
S
+ = 3V, Single Supply, T
2.0 Rail-to-Rail Output
The approximated output resistance of the LMC6582 is 50
sourcing, and 50
swing can be estimated as a function of load using the calcu-
lated output resistance.
3.0 Low Voltage Operation
The LMC6582/4 operates at supply voltages of 2.2V and
1.8V. These voltages represent the End of Discharge volt-
ages of several popular batteries. The amplifier can operate
from 1 Lead-Acid or Lithium Ion battery, or 2NiMH, NiCd, or
Carbon-Zinc batteries. Nominal and End of Discharge of
Voltage of several batteries are listed below.
DS012041-54
FIGURE 2. A
Voltages Exceeding the Supply Voltage
FIGURE 3. Input Current Protection for
Causing No Phase Inversion Due to R
Exceeds the 3V Supply,
sinking at V
Stability vs
Capacitive Load
±
A
7.5V Input Signal Greatly
= 25˚C unless otherwise
S
= 3V. The maximum output
DS012041-5
DS012041-55
I
DS012041-4