LMV321M5X National Semiconductor, LMV321M5X Datasheet - Page 17

• Manufacturer Part Number: LMV321M5X
• Description: IC,Operational Amplifier,SINGLE,BICMOS,TSOP,5PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LMV321M5X

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Application Notes
4.6.2 High Compliance Current Sink
A current sink circuit is shown in Figure 21 . The circuit re-
quires only one resistor (R
which is directly proportional to this resistor value.
4.7 Power Amplifier
A power amplifier is illustrated in Figure 22 . This circuit can
provide a higher output current because a transistor follower
is added to the output of the op amp.
4.8 LED Driver
The LMV321/358/324 can be used to drive an LED as shown
in Figure 23 .
4.9 Comparator with Hysteresis
The LMV321/358/324 can be used as a low power compara-
tor. Figure 24 shows a comparator with hysteresis. The hys-
teresis is determined by the ratio of the two resistors.
FIGURE 21. High Compliance Current Sink
V
V
TH+
TH−
FIGURE 22. Power Amplifier
= V
= V
FIGURE 23. LED Driver
REF
REF
/(1+R
/(1+R
E
) and supplies an output current
1
1
/R
/R
(Continued)
2
2
)+V
)+V
OH
OL
/(1+R
/(1+R
DS100060-82
DS100060-84
2
2
/R
/R
1
1
)
)
DS100060-79
17
where
Since
(V
The differential voltage at the input of the op amp should not
exceed the specified absolute maximum ratings. For real
comparators that are much faster, we recommend you to use
National’s LMV331/393/339, which are single, dual and quad
general purpose comparators for low voltage operation.
V
V
V
V
V
OH−
TH+
TH−
OH
OL
H
: Hysteresis Voltage
V
: Output Voltage at Low
: Output Voltage at High
: Positive Threshold Voltage
: Negative Threshold Voltage
OL
LMV321/358/324
FIGURE 24. Comparator with Hysteresis
) equals to V
V
H
= (V
V
H
S
= V
, which is the supply voltage.
OH−
S
V
have
/(1+R
OL
)/(1+R
2
/R
rail-to-rail
1
2
)
/R
1
)
DS100060-78
output,
www.national.com
the