LM6172
Dual High Speed, Low Power, Low Distortion, Voltage
Feedback Amplifiers
General Description
The LM6172 is a dual high speed voltage feedback amplifier.
It is unity-gain stable and provides excellent DC and AC
performance. With 100MHz unity-gain bandwidth, 3000V/s
slew rate and 50mA of output current per channel, the
LM6172 offers high performance in dual amplifiers; yet it
only consumes 2.3mA of supply current each channel.
The LM6172 operates on
15V power supply for systems
requiring large voltage swings, such as ADSL, scanners and
ultrasound equipment. It is also specified at
5V power
supply for low voltage applications such as portable video
systems.
The LM6172 is built with National's advanced VIP
TM
III (Ver-
tically Integrated PNP) complementary bipolar process. See
the LM6171 datasheet for a single amplifier with these same
features.
Features
(Typical Unless Otherwise Noted)
n
Easy to Use Voltage Feedback Topology
n
High Slew Rate
3000V/s
n
Wide Unity-Gain Bandwidth
100MHz
n
Low Supply Current
2.3mA/Channel
n
High Output Current
50mA/channel
n
Specified for
15V and
5V Operation
Applications
n
Scanner I-to-V Converters
n
ADSL/HDSL Drivers
n
Multimedia Broadcast Systems
n
Video Amplifiers
n
NTSC, PAL
and SECAM Systems
n
ADC/DAC Buffers
n
Pulse Amplifiers and Peak Detectors
LM6172 Driving Capacitive Load
01258150
01258144
Connection Diagram
8-Pin DIP/SO
01258101
Top View
VIP
TM
is a trademark of National Semiconductor Corporation.
PAL
is a registered trademark of and used under license from Advanced Micro Devices, Inc.
April 2003
LM6172
Dual
High
Speed,
Low
Power
,
Low
Distortion,
V
oltage
Feedback
Amplifiers
2003 National Semiconductor Corporation
DS012581
www.national.com
Ordering Information
Package
Temperature Range
Transport Media
NSC Drawing
Industrial
Military
-40C to +85C
-55C to +125C
8-Pin DIP
LM6172IN
Rails
N08E
8-Pin CDIP
LM6172AMJ-QML
5962-95604
Rails
J08A
16-Pin Ceramic
SOIC
LM6172AMWG-QML
5962-95604
Trays
WG16A
8-Pin
LM6172IM
Rails
M08A
Small Outline
LM6172IMX
Tape and Reel
LM6172
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2
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
ESD Tolerance (Note 2)
Human Body Model
3kV
Machine Model
300V
Supply Voltage (V
+
- V
-
)
36V
Differential Input Voltage
10V
Common Mode Voltage Range
V
+
+0.3V to V
-
-0.3V
Input Current
10mA
Output Short Circuit to Ground
(Note 3)
Continuous
Storage Temp. Range
-65C to +150C
Maximum Junction Temperature
(Note 4)
150C
Soldering Information
Infrared or Convection Reflow
(20 sec.)
235C
Wave Soldering Lead Temp
(10 sec.)
260C
Operating Ratings
(Note 1)
Supply Voltage
5.5V
V
S
36V
Operating Temperature Range
LM6172I
-40C to +85C
Thermal Resistance (
JA
)
N Package, 8-Pin Molded DIP
95C/W
M Package, 8-Pin Surface Mount
160C/W
15V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C,V
+
= +15V, V
-
= -15V, V
CM
= 0V, and R
L
= 1k
. Boldface
limits apply at the temperature extremes
Symbol
Parameter
Conditions
Typ
(Note 5)
LM6172I
Limit
(Note 6)
Units
V
OS
Input Offset Voltage
0.4
3
mV
4
max
TC V
OS
Input Offset Voltage
6
V/C
Average Drift
I
B
Input Bias Current
1.2
3
A
4
max
I
OS
Input Offset Current
0.02
2
A
3
max
R
IN
Input Resistance
Common Mode
40
M
Differential Mode
4.9
R
O
Open Loop Output Resistance
14
CMRR
Common Mode Rejection Ratio
V
CM
=
10V
110
70
dB
65
min
PSRR
Power Supply Rejection Ratio
V
S
=
15V to
5V
95
75
70
dB
min
V
CM
Input Common Mode Voltage Range CMRR
60dB
13.5
V
A
V
Large Signal Voltage
R
L
= 1k
86
80
dB
Gain (Note 7)
75
min
R
L
= 100
78
65
dB
60
min
V
O
Output Swing
R
L
= 1k
13.2
12.5
V
12
min
-13.1
-12.5
V
-12
max
R
L
= 100
9
6
V
5
min
-8.5
-6
V
-5
max
Continuous Output Current
Sourcing, R
L
= 100
90
60
mA
(Open Loop) (Note 8)
50
min
LM6172
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3
15V DC Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C,V
+
= +15V, V
-
= -15V, V
CM
= 0V, and R
L
= 1k
. Boldface
limits apply at the temperature extremes
Symbol
Parameter
Conditions
Typ
(Note 5)
LM6172I
Limit
(Note 6)
Units
Sinking, R
L
= 100
-85
-60
mA
-50
max
I
SC
Output Short Circuit
Sourcing
107
mA
Current
Sinking
-105
mA
I
S
Supply Current
Both Amplifiers
4.6
8
mA
9
max
15V AC Electrical Characteristics
Unless otherwise specified, T
J
= 25C, V
+
= +15V, V
-
= -15V, V
CM
= 0V, and R
L
= 1k
LM6172I
Symbol
Parameter
Conditions
Typ
Units
(Note 5)
SR
Slew Rate
A
V
= +2, V
IN
= 13 V
PP
3000
V/s
A
V
= +2, V
IN
= 10 V
PP
2500
V/s
Unity-Gain Bandwidth
100
MHz
-3 dB Frequency
A
V
= +1
160
MHz
A
V
= +2
62
MHz
Bandwidth Matching between Channels
2
MHz
m
Phase Margin
40
Deg
t
s
Settling Time (0.1%)
A
V
= -1, V
OUT
=
5V,
65
ns
R
L
= 500
A
D
Differential Gain (Note 9)
0.28
%
D
Differential Phase (Note 9)
0.6
Deg
e
n
Input-Referred
f = 1kHz
12
Voltage Noise
i
n
Input-Referred
f = 1kHz
1
Current Noise
Second Harmonic
f = 10kHz
-110
dB
Distortion (Note 10)
f = 5MHz
-50
dB
Third Harmonic
f = 10kHz
-105
dB
Distortion (Note 10)
f = 5MHz
-50
dB
5V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= +5V, V
-
= -5V, V
CM
= 0V, and R
L
= 1 k
. Boldface lim-
its apply at the temperature extremes
Symbol
Parameter
Conditions
Typ
(Note 5)
LM6172I
Limit
(Note 6)
Units
V
OS
Input Offset Voltage
0.1
3
mV
4
max
TC V
OS
Input Offset Voltage
4
V/C
Average Drift
I
B
Input Bias Current
1.4
2.5
A
3.5
max
I
OS
Input Offset Current
0.02
1.5
A
LM6172
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4
5V DC Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= +5V, V
-
= -5V, V
CM
= 0V, and R
L
= 1 k
. Boldface lim-
its apply at the temperature extremes
Symbol
Parameter
Conditions
Typ
(Note 5)
LM6172I
Limit
(Note 6)
Units
2.2
max
R
IN
Input Resistance
Common Mode
40
M
Differential Mode
4.9
R
O
Output Resistance
14
CMRR
Common Mode Rejection Ratio
V
CM
=
2.5V
105
70
dB
65
min
PSRR
Power Supply Rejection Ratio
V
S
=
15V to
5V
95
75
dB
70
min
V
CM
Input Common Mode Voltage Range
CMRR
60dB
3.7
V
A
V
Large Signal Voltage
R
L
= 1k
82
70
dB
Gain (Note 7)
65
min
R
L
= 100
78
65
dB
60
min
V
O
Output Swing
R
L
= 1k
3.4
3.1
V
3
min
-3.3
-3.1
V
-3
max
R
L
= 100
2.9
2.5
V
2.4
min
-2.7
-2.4
V
-2.3
max
Continuous Output Current
Sourcing, R
L
= 100
29
25
mA
(Open Loop) (Note 8)
24
min
Sinking, R
L
= 100
-27
-24
mA
-23
max
I
SC
Output Short Circuit
Sourcing
93
mA
Current
Sinking
-72
mA
I
S
Supply Current
Both Amplifiers
4.4
6
mA
7
max
5V AC Electrical Characteristics
Unless otherwise specified, T
J
= 25C, V
+
= +5V, V
-
= -5V, V
CM
= 0V, and R
L
= 1 k
.
LM61722
Typ
(Note 5)
Symbol
Parameter
Conditions
Units
SR
Slew Rate
A
V
= +2, V
IN
= 3.5 V
PP
750
V/s
Unity-Gain Bandwidth
70
MHz
-3 dB Frequency
A
V
= +1
130
MHz
A
V
= +2
45
MHz
m
Phase Margin
57
Deg
t
s
Settling Time (0.1%)
A
V
= -1, V
OUT
=
1V,
72
ns
R
L
= 500
A
D
Differential Gain (Note 9)
0.4
%
D
Differential Phase (Note 9)
0.7
Deg
LM6172
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