LMV324AMTC14X_Q Fairchild Semiconductor, LMV324AMTC14X_Q Datasheet - Page 7

• Manufacturer Part Number: LMV324AMTC14X_Q
• Description: Operational Amplifiers - Op Amps Low Cost RRO amp General Purpose Quad
• Manufacturer: Fairchild Semiconductor

Specifications of LMV324AMTC14X_Q

• Product Category: Operational Amplifiers - Op Amps
• Number Of Channels: 4
• Common Mode Rejection Ratio (min): 50 dB
• Input Offset Voltage: 7 mV
• Input Bias Current (max): 1 nA
• Operating Supply Voltage: 2.7 V to 5.5 V, +/- 1.35 V to +/- 2.75 V
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-14
• Slew Rate: 1.5 V/us
• Shutdown: No
• Output Current: 34 mA
• Maximum Operating Temperature: + 125 C
• Amplifier Type: Low Voltage Amplifier
• Gain Bandwidth Product: 1.2 MHz
• Maximum Dual Supply Voltage: +/- 2.75 V
• Minimum Dual Supply Voltage: +/- 1.35 V
• Minimum Operating Temperature: - 40 C
• Supply Current: 80 uA
• Technology: CMOS
• Voltage Gain Db: 70 dB

LMV321/LMV358/LMV324
Application Information
General Description
voltage-feedback amplifiers that are pin-for-pin compatible
and drop in replacements with other industry standard
LMV321, LMV358, and LMV324 amplifiers. The LMV3XX
family is fabricated on a CMOS process, features a rail-to-rail
output, and is unity gain stable.
The typical non-inverting circuit schematic is shown in Figure
1.
Power Dissipation
The maximum internal power dissipation allowed is directly
related to the maximum junction temperature. If the maximum
junction temperature exceeds 150°C, some performance
degradation will occur. If the maximum junction temperature
exceeds 175°C for an extended time, device failure may occur.
Driving Capacitive Loads
The Frequency Response vs C
response of the LMV3XX family. A small series resistance (R
at the output of the amplifier, illustrated in Figure 2, will improve
stability and settling performance. R
Response vs C
width with less than 1dB of peaking. For maximum flatness,
use a larger R
can easily drive a 200pF capacitive load without a series
resistance. For comparison, the plot also shows the LMV321
driving a 200pF load with a 225 series resistance.
Driving a capacitive load introduces phase-lag into the output
signal, which reduces phase margin in the amplifier. The
unity gain follower is the most sensitive configuration. In a
unity gain follower configuration, the LMV3XX family
requires a 450 series resistor to drive a 200pF load. The
response is illustrated in Figure 3.
REV. 1D. Feb. 2012
The LMV3XX family are dual supply, general purpose,
Figure 1: Typical Non-inverting configuration
+In
L
s
. As the plot indicates, the LMV3XX family
plot were chosen to achieve maximum band-
R
g
+
LMV3XX
-
+V
s
L
0.01 F
6.8 F
plot on page 4, illustrates the
+
R
f
s
values in the Frequency
Out
s
)
Layout Considerations
General layout and supply bypassing play major roles in high
frequency performance. Fairchild has evaluation boards to
use as a guide for high frequency layout and as aid in device
testing and characterization. Follow the steps below as a
basis for high frequency layout:
• Include 6.8 F and 0.01 F ceramic capacitors
• Place the 6.8 F capacitor within 0.75 inches of
• Place the 0.01 F capacitor within 0.1 inches of
• Remove the ground plane under and around the part,
• Minimize all trace lengths to reduce series inductances
Refer to the evaluation board layouts shown in Figure 5 on
page 8 for more information.
the power pin
the power pin
especially near the input and output pins to reduce
parasitic capacitance
Figure 3: Frequency Response vs C
Figure 2: Typical Topology for driving a
10k
-1
-2
-3
-4
-5
-6
-7
-8
-9
3
2
1
0
0.01
LMV3XX
+
-
gain configuration
10k
capacitive load
Frequency (MHz )
0.1
C
C
R
C
L
L
R
s
L
= 50pF
= 100pF
R
s
= 400
= 200pF
s
= 450
= 0
R
s
1
C
L
L
for unity
DATA SHEET
2k
10
7