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LM6181
Technical data
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National Semiconductor LM6181 Technical data

LM6181 100 mA, 100 MHz Current Feedback Amplifier
LM6181 100 mA, 100 MHz Current Feedback Amplifier
May 1998

General Description

The LM6181 current-feedback amplifier offers an unparal­leled combination of bandwidth, slew-rate, and output cur­rent. The amplifier can directly drive up to 100 pF capacitive loads without oscillating and a 10V signal into a 50Ω or 75Ω back-terminated coax cable system over the full industrial temperature range. This represents a radical enhancement in output drive capability for an 8-pin DIP high-speed ampli­fier making it ideal for video applications.
™
Built on National’s advanced high-speed VIP Integrated PNP) process, the LM6181 employs current­feedback providing bandwidth that does not vary dramati­cally with gain; 100 MHz at A With a slew rate of 2000V/µs, 2nd harmonic distortion of −50 dBc at 10 MHz and settling time of 50 ns (0.1%) the LM6181 dynamic performance makes it ideal for data acquisition, high speed ATE, and precision pulse amplifier applications.
= −1, 60 MHz at AV= −10.
V
II (Vertically

Typical Application

Features

(Typical unless otherwise noted)
n Slew rate: 2000 V/µs n Settling time (0.1%): 50 ns n Characterized for supply ranges: n Low differential gain and phase error: 0.05%, 0.04˚ n High output drive: n Guaranteed bandwidth and slew rate n Improved performance over EL2020, OP160, AD844,
LT1223 and HA5004
±
10V into 100Ω
±
5V and±15V

Applications

n Coax cable driver n Video amplifier n Flash ADC buffer n High frequency filter n Scanner and Imaging systems
Cable Driver
VIP™is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS011328 www.national.com
01132801
01132802

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
LM6181
please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage
Differential Input Voltage
Input Voltage
Inverting Input Current 15 mA
Soldering Information
Dual-In-Line Package (N)
Soldering (10 sec) 260˚C
Small Outline Package (M)
Vapor Phase (60 seconds) 215˚C
Infrared (15 seconds) 220˚C
±
Supply Voltage
±
18V
±
6V
Storage Temperature Range −65˚C ≤ T
≤ +150˚C
J
Maximum Junction Temperature 150˚C
ESD Rating (Note 2)
±
3000V

Operating Ratings

Supply Voltage Range 7V to 32V
Junction Temperature Range (Note 3)
LM6181AM −55˚C ≤ T
LM6181AI, LM6181I −40˚C ≤ T
Thermal Resistance (θ
JA
, θJC)
8-pin DIP (N) 102˚C/W, 42˚C/W
8-pin SO (M-8) 153˚C/W, 42˚C/W
16-pin SO (M) 70˚C/W, 38˚C/W
≤ +125˚C
J
≤ +85˚C
J
Output Short Circuit (Note 7)
±

15V DC Electrical Characteristics

The following specifications apply for Supply Voltage =±15V, RF= 820Ω, and RL=1kΩ unless otherwise noted. Boldface limits apply at the temperature extremes; all other limits T
= 25˚C.
J
Symbol Parameter Conditions LM6181AM LM6181AI LM6181I Units
Typical Limit Typical Limit Typical Limit
(Note 4) (Note 5) (Note 4) (Note 5) (Note 4) (Note 5)
V
Input Offset Voltage 2.0 3.0 2.0 3.0 3.5 5.0 mV
OS
4.0 3.5 5.5 max
TC V
I
Input Offset Voltage Drift 5.0 5.0 5.0 µV/˚C
OS
Inverting Input Bias Current 2.0 5.0 2.0 5.0 5.0 10 µA
B
12.0 12.0 17.0
Non-Inverting Input Bias
0.5 1.5 0.5 1.5 2.0 3.0
Current
3.0 3.0 5.0
TC I
Inverting Input Bias Current
B
30 30 30 nA/˚C
Drift
Non-Inverting Input Bias 10 10 10
Current Drift
I
Inverting Input Bias Current VS=±4.5V,±16V 0.3 0.5 0.3 0.5 0.3 0.75 µA/V
B
PSR Power Supply Rejection 3.0 3.0 4.5
Non-Inverting Input Bias
=±4.5V,±16V 0.05 0.5 0.05 0.5 0.05 0.5
V
S
Current
Power Supply Rejection 1.5 1.5 3.0
I
Inverting Input Bias Current −10V ≤ VCM≤ +10V 0.3 0.5 0.3 0.5 0.3 0.75
B
CMR Common Mode Rejection 0.75 0.75 1.0
Non-Inverting Input Bias
−10V ≤ V
≤ +10V 0.1 0.5 0.1 0.5 0.1 0.5
CM
Current
Common Mode Rejection 0.5 0.5 0.5
CMRR Common Mode Rejection
−10V ≤ V
≤ +10V 60 50 60 50 60 50 dB
CM
Ratio
50 50 50 min
PSRR Power Supply Rejection Ratio V
=±4.5V,±16V 80 70 80 70 80 70 dB
S
70 70 65 min
R
Output Resistance AV= −1, f = 300
O
0.2 0.2 0.2 Ω
kHz
max
max
www.national.com 2
±
15V DC Electrical Characteristics (Continued)
The following specifications apply for Supply Voltage =±15V, RF= 820Ω, and RL=1kΩ unless otherwise noted. Boldface limits apply at the temperature extremes; all other limits T
= 25˚C.
J
Symbol Parameter Conditions LM6181AM LM6181AI LM6181I Units
Typical Limit Typical Limit Typical Limit
(Note 4) (Note 5) (Note 4) (Note 5) (Note 4) (Note 5)
R
Non-Inverting Input
IN
Resistance
10 10 10
MΩ
min
V
Output Voltage Swing RL=1kΩ 12 11 12 11 12 11 V
O
11 11 11
= 100Ω 11 10 11 10 11 10
R
L
min
7.5 8.0 8.0
I
Output Short Circuit Current 130 100 130 100 130 100 mA
SC
75 85 85 min
Z
Transimpedance RL=1kΩ 1.8 1.0 1.8 1.0 1.8 0.8
T
0.5 0.5 0.4 MΩ
R
= 100Ω 1.4 0.8 1.4 0.8 1.4 0.7 min
L
0.4 0.4 0.35
I
Supply Current No Load, VO= 0V 7.5 10 7.5 10 7.5 10 mA
S
10 10 10 max
V
Input Common Mode V+−
CM
Voltage Range V−+
1.7V
1.7V
V+−
1.7V
V−+
1.7V
V+−
1.7V
V−+
1.7V
V
LM6181
±

15V AC Electrical Characteristics

The following specifications apply for Supply Voltage =±15V, RF= 820Ω,RL=1kΩ unless otherwise noted. Boldface limits apply at the temperature extremes; all other limits T
= 25˚C.
J
Symbol Parameter Conditions LM6181AM LM6181AI LM6181I Units
Typical Limit Typical Limit Typical Limit
(Note 4) (Note 5) (Note 4) (Note 5) (Note 4) (Note 5)
BW Closed Loop Bandwidth A
−3 dB A
PBW Power Bandwidth A
= +2 100 100 100 MHz
V
= +10 80 80 80
V
A
= −1 100 80 100 80 100 80
V
A
= −10 60 60 60
V
= −1, VO=5V
V
60 60 60
PP
min
SR Slew Rate Overdriven 2000 2000 2000 V/µs
= −1, VO=
A
V
±
10V,
R
= 150Ω (Note 6)
L
t
Settling Time (0.1%) AV= −1, VO=±5V 50 50 50 ns
s
R
= 150Ω
L
t
Rise and Fall Time VO=1V
r,tf
t
Propagation Delay Time VO=1V
p
i
Non-Inverting Input Noise f=1kHz 3 3 3
n(+)
PP
PP
1400 1000 1400 1000 1400 1000
555
666
min
Current Density
i
Inverting Input Noise f = 1 kHz 16 16 16
n(−)
Current Density
e
Input Noise Voltage
n
f=1kHz 4 4 4
Density
www.national.com3
±
15V AC Electrical Characteristics (Continued)
The following specifications apply for Supply Voltage =±15V, RF= 820Ω,RL=1kΩ unless otherwise noted. Boldface limits
LM6181
apply at the temperature extremes; all other limits T
= 25˚C.
J
Symbol Parameter Conditions LM6181AM LM6181AI LM6181I Units
Typical Limit Typical Limit Typical Limit
(Note 4) (Note 5) (Note 4) (Note 5) (Note 4) (Note 5)
Second Harmonic
2V
, 10 MHz −50 −50 −50 dBc
PP
Distortion
Third Harmonic Distortion 2 V
Differential Gain R
, 10 MHz −55 −55 −50
PP
= 150Ω
L
A
= +2 0.05 0.05 0.05 %
V
NTSC
Differential Phase R
= 150Ω
L
A
= +2 0.04 0.04 0.04 Deg
V
NTSC
www.national.com 4
±

5V DC Electrical Characteristics

The following specifications apply for Supply Voltage =±5V, RF= 820Ω, and RL=1kΩ unless otherwise noted. Boldface lim- its apply at the temperature extremes; all other limits T
= 25˚C.
J
Symbol Parameter Conditions LM6181AM LM6181AI LM6181I Units
Typical Limit Typical Limit Typical Limit
(Note 4) (Note 5) (Note 4) (Note 5) (Note 4) (Note 5)
V
Input Offset Voltage 1.0 2.0 1.0 2.0 1.0 3.0 mV
OS
3.0 2.5 3.5 max
TC
Input Offset Voltage Drift 2.5 2.5 2.5 µV/˚C
V
OS
Inverting Input 5.0 10 5.0 10 5.0 17.5 µA
I
B
Bias Current 22 22 27.0
max
Non-Inverting Input 0.25 1.5 0.25 1.5 0.25 3.0
Bias Current 1.5 1.5 5.0
TC I
Inverting Input Bias 50 50 50 nA/˚C
B
Current Drift
Non-Inverting Input 3.0 3.0 3.0
Bias Current Drift
I
Inverting Input Bias Current VS=±4.0V,±6.0V 0.3 0.5 0.3 0.5 0.3 1.0 µA/V
B
PSR Power Supply Rejection 0.5 0.5 1.0
Non-Inverting Input V
=±4.0V,±6.0V 0.05 0.5 0.05 0.5 0.05 0.5
S
max
Bias Current
Power Supply Rejection 0.5 0.5 0.5
I
Inverting Input Bias Current −2.5V ≤ VCM≤ +2.5V 0.3 0.5 0.3 0.5 0.3 1.0
B
CMR Common Mode Rejection 1.0 1.0 1.5
Non-Inverting Input −2.5V ≤ V
≤ +2.5V 0.12 0.5 0.12 0.5 0.12 0.5
CM
Bias Current
Common Mode Rejection 1.0 0.5 0.5
CMRR Common Mode −2.5V ≤ V
Rejection Ratio 47 47 47
PSRR Power Supply V
=±4.0V,±6.0V 80 70 80 70 80 64
S
≤ +2.5V 57 50 57 50 57 50 dB
CM
min
Rejection Ratio 70 70 64
R
Output Resistance AV= −1, f = 300 kHz 0.25 0.25 0.25 Ω
O
R
Non-Inverting 8 8 8 MΩ
IN
Input Resistance min
V
Output Voltage Swing RL=1kΩ 2.6 2.25 2.6 2.25 2.6 2.25 V
O
2.2 2.25 2.25
= 100Ω 2.2 2.0 2.2 2.0 2.2 2.0
R
L
min
2.0 2.0 2.0
I
Output Short 100 75 100 75 100 75 mA
SC
Circuit Current 70 70 70 min
Z
Transimpedance RL=1kΩ 1.4 0.75 1.4 0.75 1.0 0.6
T
0.35 0.4 0.3 MΩ
R
= 100Ω 1.0 0.5 1.0 0.5 1.0 0.4 min
L
0.25 0.25 0.2
I
Supply Current No Load, VO= 0V 6.5 8.5 6.5 8.5 6.5 8.5 mA
S
8.5 8.5 8.5 max
V
Input Common Mode V+−
CM
Voltage Range V
1.7V
−
1.7V
+
V+−
1.7V
V−+
1.7V
V+−
1.7V
V−+
1.7V
V
LM6181
www.national.com5
±

5V AC Electrical Characteristics

The following specifications apply for Supply Voltage =±5V, RF= 820Ω, and RL=1kΩ unless otherwise noted. Boldface lim-
LM6181
its apply at the temperature extremes; all other limits T
= 25˚C.
J
Symbol Parameter Conditions LM6181AM LM6181AI LM6181I Units
Typical Limit Typical Limit Typical Limit
(Note 4) (Note 5) (Note 4) (Note 5) (Note 4) (Note 5)
BW Closed Loop Bandwidth −3dBA
PBW Power Bandwidth A
SR Slew Rate A
t
Settling Time (0.1%) AV= −1, VO=±2V 50 50 50 ns
s
t
Rise and Fall Time VO=1V
r,tf
t
Propagation Delay Time VO=1V
p
i
Non-Inverting Input Noise f = 1 kHz 3 3 3
n(+)
= +2 50 50 50 MHz
V
= +10 40 40 40
A
V
A
=−1 553555355535
V
A
= −10 35 35 35
V
= −1, VO=4
V
V
PP
= −1, VO=±2V, 500 375 500 375 500 375 V/µs
V
R
= 150Ω (Note 6) min
L
R
= 150Ω
L
PP
PP
40 40 40
8.5 8.5 8.5
888
Current Density
i
Inverting Input Noise f = 1 kHz 16 16 16
n(−)
Current Density
e
Input Noise Voltage
n
f = 1 kHz 4 4 4
Density
Second Harmonic Distortion 2 VPP, 10 MHz −45 −45 −45 dBc
Third Harmonic Distortion 2 V
Differential Gain R
, 10 MHz −55 −55 −55
PP
= 150Ω
L
A
= +2 0.063 0.063 0.063 %
V
NTSC
Differential Phase R
= 150Ω
L
A
= +2 0.16 0.16 0.16 Deg
V
NTSC
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions the device is intended to be functional, but device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: Human body model 100 pF and 1.5 kΩ.
Note 3: The typical junction-to-ambient thermal resistance of the molded plastic DIP(N) package soldered directly into a PC board is 102˚C/W. The junction-to-
ambient thermal resistance of the S.O. surface mount (M) package mounted flush to the PC board is 70˚C/W when pins 1, 4, 8, 9 and 16 are soldered to a total 2
2
in
1 oz. copper trace. The 16-pin S.O. (M) package must have pin 4 and at least one of pins 1, 8, 9, or 16 connected to V−for proper operation. The typical
junction-to-ambient thermal resistance of the S.O. (M-8) package soldered directly into a PC board is 153˚C/W.
Note 4: Typical values represent the most likely parametric norm.
Note 5: All limits guaranteed at room temperature (standard type face) or at operating temperature extremes (bold face type).
Note 6: Measured from +25% to +75% of output waveform.
Note 7: Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature of 150˚C. Output
currents in excess of
Note 8: For guaranteed Military Temperature Range parameters see RETS6181X.
±
130 mA over a long term basis may adversely affect reliability.
min
www.national.com 6

Typical Performance Characteristics

TA= 25˚C unless otherwise noted
LM6181
CLOSED-LOOP
FREQUENCY RESPONSE
=±15V; Rf= 820Ω;
V
S
R
=1kΩ
L
UNITY GAIN
FREQUENCY RESPONSE
=±15V; AV= +1;
V
S
= 820Ω
R
f
CLOSED-LOOP
FREQUENCY RESPONSE
V
=±15V; Rf= 820Ω;
S
01132834 01132835
R
L
= 150Ω
UNIT GAIN
FREQUENCY RESPONSE
V
=±5V; AV= +1;
S
= 820Ω
R
f
FREQUENCY RESPONSE
vs SUPPLY VOLTAGE
= −1; Rf= 820Ω;
A
V
=1kΩ
R
L
01132836 01132837
FREQUENCY RESPONSE
vs SUPPLY VOLTAGE
A
= −1; Rf= 820Ω;
V
= 150Ω
R
L
01132838 01132839
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Typical Performance Characteristics T
LM6181
INVERTING GAIN
FREQUENCY RESPONSE
=±15V; AV= −1;
V
S
= 820Ω
R
f
01132840 01132841
= 25˚C unless otherwise noted (Continued)
A
INVERTING GAIN
FREQUENCY RESPONSE
V
=±5V; AV= −1;
S
= 820Ω
R
f
NON-INVERTING GAIN
FREQUENCY RESPONSE
=±15V; AV= +2;
V
S
= 820Ω
R
f
INVERTING GAIN
FREQUENCY RESPONSE
=±15V; AV= −10;
V
S
= 820Ω
R
f
NON-INVERTING GAIN
FREQUENCY RESPONSE
V
=±5V; AV= +2;
S
= 820Ω
R
f
01132842 01132843
INVERTING GAIN
FREQUENCY RESPONSE
V
=±5V; AV= −10;
S
= 820Ω
R
f
01132844 01132845
www.national.com 8
LM6181
Typical Performance Characteristics T
NON-INVERTING GAIN
FREQUENCY RESPONSE
=±15V; AV= +10;
V
S
= 820Ω
R
f
01132846 01132847
NON-INVERTING GAIN
FREQUENCY COMPENSATION
=±15V; AV= +2;
V
S
= 150Ω
R
L
= 25˚C unless otherwise noted (Continued)
A
NON-INVERTING GAIN
FREQUENCY RESPONSE
V
=±5V; AV= +10;
S
= 820Ω
R
f
BANDWIDTH vs R
f&RS
AV= −1, RL=1kΩ
OUTPUT SWING vs
PULSED, VS=±15V,
R
LOAD
=±200 µA, V
I
IN
IN+
=0V
01132848
01132850
TRANSIMPEDANCE
vs FREQUENCY
V
=±15V
S
=1kΩ
R
L
01132849
01132851
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