LMV321M5X National Semiconductor, LMV321M5X Datasheet - Page 10

• 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

www.national.com
Typical Performance Characteristics
T
Open Loop Output
Impedance vs Frequency
Application Notes
1.0 Benefits of the LMV321/358/324
Size. The small footprints of the LMV321/358/324 packages
save space on printed circuit boards, and enable the design
of smaller electronic products, such as cellular phones, pag-
ers, or other portable systems. The low profile of the
LMV321/358/324 make them possible to use in PCMCIA
type III cards.
Signal Integrity. Signals can pick up noise between the sig-
nal source and the amplifier. By using a physically smaller
amplifier package, the LMV321/358/324 can be placed
closer to the signal source, reducing noise pickup and in-
creasing signal integrity.
Simplified Board Layout. These products help you to avoid
using long pc traces in your pc board layout. This means that
no additional components, such as capacitors and resistors,
are needed to filter out the unwanted signals due to the inter-
ference between the long pc traces.
Low Supply Current. These devices will help you to maxi-
mize battery life. They are ideal for battery powered sys-
tems.
Low Supply Voltage. National provides guaranteed perfor-
mance at 2.7V and 5V. These guarantees ensure operation
throughout the battery lifetime.
Rail-to-Rail Output. Rail-to-rail output swing provides maxi-
mum possible dynamic range at the output. This is particu-
larly important when operating on low supply voltages.
Input Includes Ground. Allows direct sensing near GND in
single supply operation.
The differential input voltage may be larger than V
damaging the device. Protection should be provided to pre-
vent the input voltages from going negative more than −0.3V
(at 25˚C). An input clamp diode with a resistor to the IC input
terminal can be used.
Ease of Use & No Crossover Distortion. The LMV321/
358/324 offer specifications similar to the familiar LM324. In
addition, the new LMV321/358/324 effectively eliminate the
output crossover distortion. The scope photos in Figure 1
and Figure 2 compare the output swing of the LMV324 and
the LM324 in a voltage follower configuration, with V
2.5V and R
the crossover distortion has been eliminated in the new
LMV324.
A
= 25˚C. (Continued)
L
( = 2k ) connected to GND. It is apparent that
DS100060-55
Short Circuit Current
vs Temperature (Sinking)
+
without
S
=
±
Unless otherwise specified, V
10
2.0 Capacitive Load Tolerance
The LMV321/358/324 can directly drive 200 pF in unity-gain
without oscillation. The unity-gain follower is the most sensi-
tive configuration to capacitive loading. Direct capacitive
loading reduces the phase margin of amplifiers. The combi-
nation of the amplifier’s output impedance and the capacitive
load induces phase lag. This results in either an under-
damped pulse response or oscillation. To drive a heavier ca-
pacitive load, circuit in Figure 3 can be used.
DS100060-65
FIGURE 1. Output Swing of LMV324
FIGURE 2. Output Swing of LM324
Short Circuit Current
vs Temperature (Sourcing)
Time (50 s/div)
Time (50 s/div)
S
= +5V, single supply,
DS100060-97
DS100060-98
DS100060-66