LM6171
High Speed Low Power Low Distortion Voltage Feedback
Amplifier
General Description
The LM6171 is a high speed unity-gain stable voltage feed-
back amplifier. It offers a high slew rate of 3600V/s and a
unity-gain bandwidth of 100 MHz while consuming only 2.5
mA of supply current. The LM6171 has very impressive AC
and DC performance which is a great benefit for high speed
signal processing and video applications.
The
15V power supplies allow for large signal swings and
give greater dynamic range and signal-to-noise ratio. The
LM6171 has high output current drive, low SFDR and THD,
ideal for ADC/DAC systems. The LM6171 is specified for
5V operation for portable applications.
The LM6171 is built on National's advanced VIP
TM
III (Verti-
cally Integrated PNP) complementary bipolar process.
Features
(Typical Unless Otherwise Noted)
n
Easy-To-Use Voltage Feedback Topology
n
Very High Slew Rate:
3600V/s
n
Wide Unity-Gain-Bandwidth Product:
100 MHz
n
-3 dB Frequency
@
A
V
= +2: 62 MHz
n
Low Supply Current:
2.5 mA
n
High CMRR:
110 dB
n
High Open Loop Gain:
90 dB
n
Specified for
15V and
5V Operation
Applications
n
Multimedia Broadcast Systems
n
Line Drivers, Switchers
n
Video Amplifiers
n
NTSC, PAL
and SECAM Systems
n
ADC/DAC Buffers
n
HDTV Amplifiers
n
Pulse Amplifiers and Peak Detectors
n
Instrumentation Amplifier
n
Active Filters
Typical Performance Characteristics
VIP
TM
is a trademark of National Semiconductor Corporation.
PAL
is a registered trademark of and used under licence from Advanced Micro Devices, Inc.
Closed Loop Frequency Response
vs Supply Voltage (A
V
= +1)
DS012336-5
Large Signal
Pulse Response
A
V
= +1, V
S
=
15
DS012336-9
May 1998
LM6171
High
Speed
Low
Power
Low
Distortion
V
oltage
Feedback
Amplifier
1999 National Semiconductor Corporation
DS012336
www.national.com
Connection Diagram
Ordering Information
Package
Temperature Range
Transport
Media
NSC
Drawing
Industrial
-40C to +85C
8-Pin
LM6171AIN
Rails
N08E
Molded DIP
LM6171BIN
8-Pin
LM6171AIM, LM6171BIM
Rails
M08A
Small Outline
LM6171AIMX, LM6171BIMX
Tape and Reel
8-Pin DIP/SO
DS012336-1
Top View
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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)
2.5 kV
Supply Voltage (V
+
V
-
)
36V
Differential Input Voltage
(Note 11)
10V
Common-Mode
Voltage Range
V
+
-1.4V to V
-
+ 1.4V
Output Short Circuit to Ground
(Note 3)
Continuous
Storage Temperature Range
-65C to +150C
Maximum Junction Temperature
(Note 4)
150C
Operating Ratings
(Note 1)
Supply Voltage
2.75V
V
+
18V
Junction Temperature Range
LM6171AI, LM6171BI
-40C
T
J
+85C
Thermal Resistance (
JA
)
N Package, 8-Pin Molded DIP
108C/W
M Package, 8-Pin Surface Mount
172C/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
= 1 k
. Boldface
limits apply at the temperature extremes
Typ
LM6171AI
LM6171BI
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
1.5
3
6
mV
5
8
max
TC V
OS
Input Offset Voltage Average Drift
6
V/C
I
B
Input Bias Current
1
3
3
A
4
4
max
I
OS
Input Offset Current
0.03
2
2
A
3
3
max
R
IN
Input Resistance
Common Mode
40
M
Differential Mode
4.9
R
O
Open Loop
14
Output Resistance
CMRR
Common Mode
V
CM
=
10V
110
80
75
dB
Rejection Ratio
75
70
min
PSRR
Power Supply
V
S
=
15V to
5V
95
85
80
dB
Rejection Ratio
80
75
min
V
CM
Input Common-Mode
CMRR
60 dB
13.5
V
Voltage Range
A
V
Large Signal Voltage
R
L
= 1 k
90
80
80
dB
Gain (Note 7)
70
70
min
R
L
= 100
83
70
70
dB
60
60
min
V
O
Output Swing
R
L
= 1 k
13.3
12.5
12.5
V
12
12
min
-13.3
-12.5
-12.5
V
-12
-12
max
R
L
= 100
11.6
9
9
V
8.5
8.5
min
-10.5
-9
-9
V
-8.5
-8.5
max
Continuous Output Current
Sourcing, R
L
= 100
116
90
90
mA
(Open Loop) (Note 8)
85
85
min
Sinking, R
L
= 100
105
90
90
mA
85
85
max
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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
= 1 k
. Boldface
limits apply at the temperature extremes
Typ
LM6171AI
LM6171BI
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
Continuous Output Current
Sourcing, R
L
= 10
100
mA
(in Linear Region)
Sinking, R
L
= 10
80
mA
I
SC
Output Short
Sourcing
135
mA
Circuit Current
Sinking
135
mA
I
S
Supply Current
2.5
4
4
mA
4.5
4.5
max
15V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= +15V, V
-
= -15V, V
CM
= 0V, and R
L
= 1 k
. Boldface
limits apply at the temperature extremes
Typ
LM6171AI
LM6171BI
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
SR
Slew Rate (Note 9)
A
V
= +2, V
IN
= 13 V
PP
3600
V/s
A
V
= +2, V
IN
= 10 V
PP
3000
GBW
Unity Gain-Bandwidth Product
100
MHz
-3 dB Frequency
A
V
= +1
160
MHz
A
V
= +2
62
MHz
m
Phase Margin
40
deg
t
s
Settling Time (0.1%)
A
V
= -1, V
OUT
=
5V
48
ns
R
L
= 500
Propagation Delay
V
IN
=
5V, R
L
= 500
,
6
ns
A
V
= -2
A
D
Differential Gain (Note 10)
0.03
%
D
Differential Phase (Note 10)
0.5
deg
e
n
Input-Referred
f = 1 kHz
12
Voltage Noise
i
n
Input-Referred
f = 1 kHz
1
Current Noise
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
limits apply at the temperature extremes
Typ
LM6171AI
LM6171BI
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
1.2
3
6
mV
5
8
max
TC V
OS
Input Offset Voltage
4
V/C
Average Drift
I
B
Input Bias Current
1
2.5
2.5
A
3.5
3.5
max
I
OS
Input Offset Current
0.03
1.5
1.5
A
2.2
2.2
max
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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
limits apply at the temperature extremes
Typ
LM6171AI
LM6171BI
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
R
IN
Input Resistance
Common Mode
40
M
Differential Mode
4.9
R
O
Open Loop
14
Output Resistance
CMRR
Common Mode
V
CM
=
2.5V
105
80
75
dB
Rejection Ratio
75
70
min
PSRR
Power Supply
V
S
=
15V to
5V
95
85
80
dB
Rejection Ratio
80
75
min
V
CM
Input Common-Mode
CMRR
60 dB
3.7
V
Voltage Range
A
V
Large Signal Voltage
R
L
= 1 k
84
75
75
dB
Gain (Note 7)
65
65
min
R
L
= 100
80
70
70
dB
60
60
min
V
O
Output Swing
R
L
= 1 k
3.5
3.2
3.2
V
3
3
min
-3.4
-3.2
-3.2
V
-3
-3
max
R
L
= 100
3.2
2.8
2.8
V
2.5
2.5
min
-3.0
-2.8
-2.8
V
-2.5
-2.5
max
Continuous Output Current
Sourcing, R
L
= 100
32
28
28
mA
(Open Loop) (Note 8)
25
25
min
Sinking, R
L
= 100
30
28
28
mA
25
25
max
I
SC
Output Short
Sourcing
130
mA
Circuit Current
Sinking
100
mA
I
S
Supply Current
2.3
3
3
mA
3.5
3.5
max
5V AC 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
limits apply at the temperature extremes
Typ
LM6171AI
LM6171BI
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
SR
Slew Rate (Note 9)
A
V
= +2, V
IN
= 3.5 V
PP
750
V/s
GBW
Unity Gain-Bandwidth
70
MHz
Product
-3 dB Frequency
A
V
= +1
130
MHz
A
V
= +2
45
m
Phase Margin
57
deg
t
s
Settling Time (0.1%)
A
V
= -1, V
OUT
= +1V,
60
ns
R
L
= 500
Propagation Delay
V
IN
=
1V, R
L
= 500
,
8
ns
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5
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