LM7171
Very High Speed, High Output Current, Voltage
Feedback Amplifier
General Description
The LM7171 is a high speed voltage feedback amplifier that
has the slewing characteristic of a current feedback ampli-
fier; yet it can be used in all traditional voltage feedback am-
plifier configurations. The LM7171 is stable for gains as low
as +2 or -1. It provides a very high slew rate at 4100V/s
and a wide unity-gain bandwidth of 200 MHz while consum-
ing only 6.5 mA of supply current. It is ideal for video and
high speed signal processing applications such as HDSL
and pulse amplifiers. With 100 mA output current, the
LM7171 can be used for video distribution, as a transformer
driver or as a laser diode driver.
Operation on
15V power supplies allows for large signal
swings
and
provides
greater
dynamic
range
and
signal-to-noise ratio. The LM7171 offers low SFDR and
THD, ideal for ADC/DAC systems. In addition, the LM7171 is
specified for
5V operation for portable applications.
The LM7171 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:
4100V/s
n
Wide Unity-Gain Bandwidth:
200 MHz
n
-3 dB Frequency
@
A
V
= +2: 220 MHz
n
Low Supply Current:
6.5 mA
n
High Open Loop Gain:
85 dB
n
High Output Current:
100 mA
n
Differential Gain and Phase:
0.01%, 0.02
n
Specified for
15V and
5V Operation
Applications
n
HDSL and ADSL Drivers
n
Multimedia Broadcast Systems
n
Professional Video Cameras
n
Video Amplifiers
n
Copiers/Scanners/Fax
n
HDTV Amplifiers
n
Pulse Amplifiers and Peak Detectors
n
CATV/Fiber Optics Signal Processing
Typical Performance
Connection Diagrams
VIP
TM
is a trademark of National Semiconductor Corporation.
Large Signal Pulse Response
A
V
= +2, V
S
=
15V
DS012385-1
8-Pin DIP/SO
DS012385-2
Top View
16-Pin Wide Body SO
DS012385-3
Top View
May 1999
LM7171
V
ery
High
Speed,
High
Output
Current,
V
oltage
Feedback
Amplifier
1999 National Semiconductor Corporation
DS012385
www.national.com
Ordering Information
Package
Temperature Range
Transport
Media
NSC
Drawing
Industrial
Military
-40C to +85C
-55C to +125C
8-Pin DIP
LM7171AIN, LM7171BIN
Rails
N08E
8-Pin CDIP
LM7171AMJ-QML
LM7171AMJ-QMLV
5962-95536
Rails
J08A
10-Pin Ceramic
SOIC
LM7171AMWG-QML
LM7171AMWG-QMLV
5962-95536
Trays
WG10A
8-Pin
LM7171AIM, LM7171BIM
Rails
M08A
Small Outline
LM7171AIMX, LM7171BIMX
Tape and Reel
16-Pin
LM7171AIWM, LM7171BIWM
Rails
M16B
Small Outline
LM7171AWMX, LM7171BWMX
Tape and Reel
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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
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
5.5V
V
S
36V
Junction Temperature Range
LM7171AI, LM7171BI
-40C
T
J
+85C
Thermal Resistance (
JA
)
N Package, 8-Pin Molded DIP
108C/W
M Package, 8-Pin Surface Mount
172C/W
M Package, 16-Pin Surface Mount
95C/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
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7171AI
LM7171BI
Units
Limit
Limit
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
0.2
1
3
mV
4
7
max
TC V
OS
Input Offset Voltage
35
V/C
Average Drift
I
B
Input Bias Current
2.7
10
10
A
12
12
max
I
OS
Input Offset Current
0.1
4
4
A
6
6
max
R
IN
Input Resistance
Common Mode
40
M
Differential Mode
3.3
R
O
Open Loop Output
15
Resistance
CMRR
Common Mode
V
CM
=
10V
105
85
75
dB
Rejection Ratio
80
70
min
PSRR
Power Supply
V
S
=
15V to
5V
90
85
75
dB
Rejection Ratio
80
70
min
V
CM
Input Common-Mode
CMRR
>
60 dB
13.35
V
Voltage Range
A
V
Large Signal Voltage
R
L
= 1 k
85
80
75
dB
Gain (Note 7)
75
70
min
R
L
= 100
81
75
70
dB
70
66
min
V
O
Output Swing
R
L
= 1 k
13.3
13
13
V
12.7
12.7
min
-13.2
-13
-13
V
-12.7
-12.7
max
R
L
= 100
11.8
10.5
10.5
V
9.5
9.5
min
-10.5
-9.5
-9.5
V
-9
-9
max
Output Current
Sourcing, R
L
= 100
118
105
105
mA
(Open Loop)
95
95
min
(Note 8)
Sinking, R
L
= 100
105
95
95
mA
90
90
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
Symbol
Parameter
Conditions
Typ
(Note 5)
LM7171AI
LM7171BI
Units
Limit
Limit
(Note 6)
(Note 6)
Output Current
Sourcing, R
L
= 100
100
mA
(in Linear Region)
Sinking, R
L
= 100
100
I
SC
Output Short Circuit
Sourcing
140
mA
Current
Sinking
135
I
S
Supply Current
6.5
8.5
8.5
mA
9.5
9.5
max
15V AC Electrical Characteristics
Unless otherwise specified, T
J
= 25C, V
+
= +15V, V
-
= -15V, V
CM
= 0V, and R
L
= 1 k
.
Typ
LM7171AI
LM7171BI
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
4100
V/s
A
V
= +2, V
IN
= 10 V
PP
3100
Unity-Gain Bandwidth
200
MHz
-3 dB Frequency
A
V
= +2
220
MHz
m
Phase Margin
50
Deg
t
s
Settling Time (0.1%)
A
V
= -1, V
O
=
5V
42
ns
R
L
= 500
t
p
Propagation Delay
A
V
= -2, V
IN
=
5V,
5
ns
R
L
= 500
A
D
Differential Gain (Note 10)
0.01
%
D
Differential Phase (Note 10)
0.02
Deg
Second Harmonic (Note 12)
f
IN
= 10 kHz
-110
dBc
f
IN
= 5 MHz
-75
dBc
Third Harmonic (Note 12)
f
IN
= 10 kHz
-115
dBc
f
IN
= 5 MHz
-55
dBc
e
n
Input-Referred
f = 10 kHz
14
Voltage Noise
i
n
Input-Referred
f = 10 kHz
1.5
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 lim-
its apply at the temperature extremes
Typ
LM7171AI
LM7171BI
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
V
OS
Input Offset Voltage
0.3
1.5
3.5
mV
4
7
max
TC V
OS
Input Offset Voltage
35
V/C
Average Drift
I
B
Input Bias Current
3.3
10
10
A
12
12
max
I
OS
Input Offset Current
0.1
4
4
A
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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
Typ
LM7171AI
LM7171BI
Symbol
Parameter
Conditions
(Note 5)
Limit
Limit
Units
(Note 6)
(Note 6)
6
6
max
R
IN
Input Resistance
Common Mode
40
M
Differential Mode
3.3
R
O
Output Resistance
15
CMRR
Common Mode
V
CM
=
2.5V
104
80
70
dB
Rejection Ratio
75
65
min
PSRR
Power Supply
V
S
=
15V to
5V
90
85
75
dB
Rejection Ratio
80
70
min
V
CM
Input Common-Mode
CMRR
>
60 dB
3.2
V
Voltage Range
A
V
Large Signal Voltage
R
L
= 1 k
78
75
70
dB
Gain (Note 7)
70
65
min
R
L
= 100
76
72
68
dB
67
63
min
V
O
Output Swing
R
L
= 1 k
3.4
3.2
3.2
V
3
3
min
-3.4
-3.2
-3.2
V
-3
-3
max
R
L
= 100
3.1
2.9
2.9
V
2.8
2.8
min
-3.0
-2.9
-2.9
V
-2.8
-2.8
max
Output Current
Sourcing, R
L
= 100
31
29
29
mA
(Open Loop) (Note 8)
28
28
min
Sinking, R
L
= 100
30
29
29
mA
28
28
max
I
SC
Output Short Circuit
Sourcing
135
mA
Current
Sinking
100
I
S
Supply Current
6.2
8
8
mA
9
9
max
5V AC Electrical Characteristics
Unless otherwise specified, T
J
= 25C, V
+
= +5V, V
-
= -5V, V
CM
= 0V, and R
L
= 1 k
.
Typ
LM7171AI
LM7171BI
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
950
V/s
Unity-Gain Bandwidth
125
MHz
-3 dB Frequency
A
V
= +2
140
MHz
m
Phase Margin
57
Deg
t
s
Settling Time (0.1%)
A
V
= -1, V
O
=
1V,
56
ns
R
L
= 500
t
p
Propagation Delay
A
V
= -2, V
IN
=
1V,
6
ns
R
L
= 500
A
D
Differential Gain (Note 1)
0.02
%
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5
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