Datasheet

Table Of Contents
LMV82x, LMV82xA Application information
Doc ID 022467 Rev 3 17/32
4.7 Shutdown function
The operational amplifier is enabled when the SHDN pin is pulled high. To disable the
amplifier, the
SHDN pin must be pulled down to V
CC-
. When in shutdown mode, the
amplifier output is in a high impedance state. The
SHDN pin must never be left floating but
tied to V
CC+
or V
CC-
.
The turn-on and turn-off times are calculated for an output variation of ±200 mV. Figure 21
and Figure 22 show the test configurations. Figure 23 and Figure 24 show the respective
results with these test configurations.
Figure 21. Test configuration for turn-on time
(Vout pulled down)
Figure 22. Test configuration for turn-off time
(Vout pulled down)
+
GND
GND
Vcc
Vcc–1V
2kΩ
+
GND
GND
Vcc
Vcc–1V
2kΩ
Figure 23. Turn-on time, V
CC
= 5 V,
Vout pulled down, T = 25 °C
Figure 24. Turn-off time, V
CC
= 5 V,
Vout pulled down, T = 25 °C
-0.1 0.0 0.1 0.2 0.3 0.4 0.5
-3
-2
-1
0
1
2
3
Shutdown pulse
Vout
Vcc = 5V
T = 25°C
R
L
connected to GND
Voltage (V)
Time(µs)
-0.05 0.00 0.05 0.10 0.15 0.20
-3
-2
-1
0
1
2
3
Shutdown pulse
Vout
Vcc = 5V
T = 25°C
R
L
connected to GND
Output voltage (V)
Time(µs)