LT1206
250mA/60MHz Current
Feedback Amplifier
FEATURES
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DESCRIPTION
The LT
®
1206 is a current feedback amplifier with high
output current drive capability and excellent video char-
acteristics. The LT1206 is stable with large capacitive
loads, and can easily supply the large currents required
by the capacitive loading. A shutdown feature switches
the device into a high impedance, low current mode,
reducing dissipation when the device is not in use. For
lower bandwidth applications, the supply current can be
reduced with a single external resistor. The low differential
gain and phase, wide bandwidth, and the 250mA mini-
mum output current drive make the LT1206 well suited
to drive multiple cables in video systems.
The LT1206 is manufactured on Linear Technology’s
proprietary complementary bipolar process.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
250mA Minimum Output Drive Current
60MHz Bandwidth, A
V
= 2, R
L
= 100Ω
900V/µs Slew Rate, A
V
= 2, R
L
= 50Ω
0.02% Differential Gain, A
V
= 2, R
L
= 30Ω
0.17° Differential Phase, A
V
= 2, R
L
= 30Ω
High Input Impedance, 10MΩ
Wide Supply Range, ±5V to ±15V
Shutdown Mode: I
S
< 200µA
Adjustable Supply Current
Stable with C
L
= 10,000p
Available in 8-Pin DIP and SO and 7-Pin DD and
TO-220 Packages
APPLICATIONS
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Video Amplifiers
Cable Drivers
RGB Amplifiers
Test Equipment Amplifiers
Buffers
TYPICAL APPLICATION
Noninverting Amplifier with Shutdown
15V
V
IN
Large-Signal Response, CL = 10,000pF
+
LT1206 COMP
C
COMP
–
S/D**
0.01µF*
–15V
R
F
15V
5V
R
G
24k
74C906
LT1206 • TA01
V
OUT
*OPTIONAL, USE WITH CAPACITIVE LOADS
**GROUND SHUTDOWN PIN FOR
NORMAL OPERATION
ENABLE
V
S
=
±15V
R
L
= R
G
= 3k
R
L
=
∞
500ns/DIV
1206 TA02
1206fa
1
LT1206
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage ........................................................±18V
Input Current........................................................±15mA
Output Short-Circuit Duration (Note 2) .........Continuous
Specified Temperature Range (Note 3) ........ 0°C to 70°C
Operating Temperature Range ................. –40°C to 85°C
Junction Temperature ........................................... 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
PACKAGE/OERDER INFORMATION
TOP VIEW
NC 1
–IN 2
+IN 3
S/D* 4
8
7
6
5
V
+
OUT
V
–
TOP VIEW
V
+
1
–IN 2
+IN 3
S/D* 4
8
7
6
5
V
+
OUT
V
–
COMP
COMP
N8 PACKAGE
8-LEAD PLASTIC DIP
θ
JA
= 100°C/W
S8 PACKAGE
8-LEAD PLASTIC SO
θ
JA
= 60°C/W
ORDER PART NUMBER
LT1206CN8**
FRONT VIEW
7
6
5
4
3
2
1
OUT
V
–
COMP
V
+
S/D*
+IN
–IN
ORDER PART NUMBER
LT1206CS8**
FRONT VIEW
7
6
5
4
3
2
1
S8 PART MARKING
1206
OUT
V
–
COMP
V
+
S/D*
+IN
–IN
TAB IS
V
+
TAB IS
V
+
R PACKAGE
7-LEAD PLASTIC DD
θ
JA
= 30°C/W
T7 PACKAGE
7-LEAD PLASTIC TO-220
θ
JA
= 5°C/W
ORDER PART NUMBER
LT1206CR**
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
ORDER PART NUMBER
LT1206CT7**
Consult LTC Marketing for parts specified with wider operating temperature ranges. *Ground shutdown pin for normal operation. ** See Note 3.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
I
IN+
I
IN
–
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CM
= 0, ±5V ≤ V
S
≤ 15V, pulse tested, V
S/D
= 0V, unless otherwise noted.
CONDITIONS
●
●
●
●
MIN
TYP
±3
10
±2
±10
MAX
±10
±15
±8
±25
±60
±100
UNITS
mV
mV
µV/°C
µA
µA
µA
µA
1206fa
Noninverting Input Current
Inverting Input Current
2
LT1206
ELECTRICAL CHARACTERISTICS
SYMBOL
e
n
+i
n
–i
n
R
IN
C
IN
PARAMETER
Input Noise Voltage Density
Input Noise Current Density
Input Noise Current Density
Input Resistance
Input Capacitance
Input Voltage Range
CMRR
Common Mode Rejection Ratio
Inverting Input Current Common Mode
Rejection
Power Supply Rejection Ratio
Noninverting Input Current Power Supply
Rejection
Inverting Input Current Power Supply
Rejection
Large-Signal Voltage Gain
Transresistance,
ΔV
OUT
/ΔI
IN–
Maximum Output Voltage Swing
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CM
= 0, ±5V ≤ V
S
≤ 15V, pulse tested, V
S/D
= 0V, unless otherwise noted.
CONDITIONS
f = 10kHz, R
F
= 1k, R
G
= 10Ω, R
S
= 0Ω
f = 10kHz, R
F
= 1k, R
G
= 10Ω, R
S
= 10k
f = 10kHz, R
F
= 1k, R
G
= 10Ω, R
S
= 10k
V
IN
= ±12V, V
S
= ±15V
V
IN
= ±2V, V
S
= ±5V
V
S
= ±15V
V
S
= ±15V
V
S
= ±5V
V
S
= ±15V, V
CM
= ±12V
V
S
= ±5V, V
CM
= ±2V
V
S
= ±15V, V
CM
= ±12V
V
S
= ±5V, V
CM
= ±2V
V
S
= ±5V to ±15V
V
S
= ±5V to ±15V
V
S
= ±5V to ±15V
V
S
= ±15V, V
OUT
= ±10V, R
L
= 50Ω
V
S
= ±5V, V
OUT
= ±2V, R
L
= 25Ω
V
S
= ±15V, V
OUT
= ±10V, R
L
= 50Ω
V
S
= ±5V, V
OUT
= ±2V, R
L
= 25Ω
V
S
= ±15V, R
L
= 50Ω
V
S
= ±15V, R
L
= 25Ω
I
OUT
Maximum Output Current
Supply Current
Supply Current, R
S/D
= 51k (Note 4)
Positive Supply Current, Shutdown
Output Leakage Current, Shutdown
SR
Slew Rate (Note 5)
Differential Gain (Note 6)
Differential Phase (Note 6)
BW
Small-Signal Bandwidth
R
L
= 1Ω
V
S
= ±15V, V
S/D
= 0V
V
S
= ±15V
V
S
= ±15V, V
S/D
= 15V
V
S
= ±15V, V
S/D
= 15V
A
V
= 2
V
S
= ±15V, R
F
= 560Ω, R
G
= 560Ω, R
L
= 30Ω
V
S
= ±15V, R
F
= 560Ω, R
G
= 560Ω, RL = 30Ω
V
S
= ±15V, Peaking ≤ 0.5dB,
R
F
= R
G
= 620Ω, R
L
= 100Ω
V
S
= ±15V, Peaking ≤ 0.5dB,
R
F
= R
G
= 649Ω, R
L
= 50Ω
V
S
= ±15V, Peaking ≤ 0.5dB,
R
F
= R
G
= 698Ω, R
L
= 30Ω
V
S
= ±15V, Peaking ≤ 0.5dB,
R
F
= R
G
= 825Ω, R
L
= 10Ω
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
MIN
TYP
3.6
2
30
MAX
UNITS
nV/√Hz
pA/√Hz
pA/√Hz
MΩ
MΩ
pF
V
V
dB
dB
µA/V
µA/V
dB
nA/V
µA/V
dB
dB
kΩ
kΩ
V
V
V
V
mA
mA
mA
mA
µA
µA
V/µs
%
Deg
MHz
MHz
MHz
MHz
1.5
0.5
±12
±2
55
50
10
5
2
±13.5
±3.5
62
60
0.1
0.1
77
30
0.7
10
10
500
5
PSRR
60
A
V
R
OL
V
OUT
55
55
100
75
±11.5
±10.0
±2.5
±2.0
250
71
68
260
200
±12.5
±3.0
500
20
12
1200
30
35
17
200
10
I
S
400
900
0.02
0.17
60
52
43
27
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
Applies to short circuits to ground only. A short circuit between
the output and either supply may permanently damage the part when
operated on supplies greater than ± 10V.
Note 3:
Commercial grade parts are designed to operate over the
temperature range of –40°C to 85°C but are neither tested nor guaranteed
beyond 0°C to 70°C. Industrial grade parts tested over –40°C to 85°C are
available on special request. Consult factory.
Note 4:
R
S/D
is connected between the shutdown pin and ground.
Note 5:
Slew rate is measured at ±5V on a ± 10V output signal while
operating on ±15V supplies with R
F
= 1.5k, R
G
= 1.5k and R
L
= 400Ω.
Note 6:
NTSC composite video with an output level of 2V.
1206fa
3
LT1206
SMALL-SIGNAL BANDWIDTH
I
S
= 20mA Typical, Peaking ≤ 0.1dB
A
V
–1
R
L
150
30
10
150
30
10
150
30
10
150
30
10
R
F
562
649
732
619
715
806
576
649
750
442
511
649
R
G
562
649
732
–
–
–
576
649
750
48.7
56.2
71.5
–3dB BW
(MHz)
48
34
22
54
36
22.4
48
35
22.4
40
31
20
–0.1dB BW
(MHz)
21.4
17
12.5
22.3
17.5
11.5
20.7
18.1
11.7
19.2
16.5
10.2
A
V
–1
R
L
150
30
10
150
30
10
150
30
10
150
30
10
R
F
681
768
887
768
909
1k
665
787
931
487
590
768
R
G
681
768
887
–
–
–
665
787
931
536
64.9
84.5
–3dB BW
(MHz)
50
35
24
66
37
23
55
36
22.5
44
33
20.7
–0.1dB BW
(MHz)
19.2
17
12.3
22.4
17.5
12
23
18.5
11.8
20.7
17.5
10.8
V
S
= ±5V, R
S/D
= 0Ω
V
S
= ±15V, R
S/D
= 0Ω
1
1
2
2
10
10
I
S
= 10mA Typical, Peaking ≤ 0.1dB
A
V
–1
R
L
150
30
10
150
30
10
150
30
10
150
30
10
R
F
576
681
750
665
768
845
590
681
768
301
392
499
R
G
576
681
750
–
–
–
590
681
768
33.2
43.2
54.9
–3dB BW
(MHz)
35
25
16.4
37
25
16.5
35
25
16.2
31
23
15
–0.1dB BW
(MHz)
17
12.5
8.7
17.5
12.6
8.2
16.8
13.4
8.1
15.6
11.9
7.8
A
V
–1
R
L
150
30
10
150
30
10
150
30
10
150
30
10
R
F
634
768
866
768
909
1k
649
787
931
301
402
590
R
G
634
768
866
–
–
–
649
787
931
33.2
44.2
64.9
–3dB BW
(MHz)
41
26.5
17
44
28
16.8
40
27
16.5
33
25
15.3
–0.1dB BW
(MHz)
19.1
14
9.4
18.8
14.4
8.3
18.5
14.1
8.1
15.6
13.3
7.4
V
S
= ±5V, R
S/D
= 10.2k
V
S
= ±15V, R
S/D
= 60.4k
1
1
2
2
10
10
I
S
= 5mA Typical, Peaking ≤ 0.1dB
A
V
–1
R
L
150
30
10
150
30
10
150
30
10
150
30
10
R
F
604
715
681
768
866
825
634
750
732
100
100
100
R
G
604
715
681
–
–
–
634
750
732
11.1
11.1
11.1
–3dB BW
(MHz)
21
14.6
10.5
20
14.1
9.8
20
14.1
9.6
16.2
13.4
9.5
–0.1dB BW
(MHz)
10.5
7.4
6.0
9.6
6.7
5.1
9.6
7.2
5.1
5.8
7.0
4.7
A
V
–1
R
L
150
30
10
150
30
10
150
30
10
150
30
10
R
F
619
787
825
845
1k
1k
681
845
866
100
100
100
R
G
619
787
825
–
–
–
681
845
866
11.1
11.1
11.1
–3dB BW
(MHz)
25
15.8
10.5
23
15.3
10
23
15
10
15.9
13.6
9.6
–0.1dB BW
(MHz)
12.5
8.5
5.4
10.6
7.6
5.2
10.2
7.7
5.4
4.5
6
4.5
1206fa
V
S
= ±5V, R
S/D
= 22.1k
V
S
= ±15V, R
S/D
= 121k
1
1
2
2
10
10
4
LT1206
TYPICAL PERFORMANCE CHARACTERISTICS
Bandwidth vs Supply Voltage
100
90
– 3dB BANDWIDTH (MHz)
80
70
60
50
40
30
20
10
0
4
6
14
12
10
8
SUPPLY VOLTAGE (±V)
16
18
R
F
= 1k
R
F
= 1.5k
0
4
6
14
12
10
8
SUPPLY VOLTAGE (±V)
16
18
100
1
R
F
= 750Ω
R
F
= 470Ω
R
F
= 560Ω
R
F
= 680Ω
PEAKING
≤
0.5dB
PEAKING
≤
5dB
A
V
= 2
R
L
= 100Ω
–3dB BANDWIDTH (MHz)
40
R
F
= 560Ω
30
R
F
= 750Ω
R
F
= 1k
R
F
= 2k
10
50
PEAKING
≤
0.5dB
PEAKING
≤
5dB
A
V
= 2
R
L
= 10Ω
FEEDBACK RESISTOR (Ω)
Bandwidth vs Supply Voltage
10k
Bandwidth and Feedback Resistance
vs Capacitive Load for 0.5dB Peak
100
BANDWIDTH
–3dB BANDWIDTH (MHz)
1k
FEEDBACK RESISTOR
A
V
= 2
R
L
=
∞
V
S
=
±15V
C
COMP
= 0.01µF
100
10
1000
CAPACITIVE LOAD (pF)
10
20
1
10000
LT1206 • TPC01
LT1206 • TPC02
LT1206 • TPC03
Bandwidth vs Supply Voltage
100
90
–3dB BANDWIDTH (MHz)
80
70
60
50
40
30
20
10
0
4
6
14
12
10
8
SUPPLY VOLTAGE (±V)
16
18
R
F
= 680Ω
R
F
= 1.5k
0
R
F
= 470Ω
R
F
=390Ω
R
F
= 330Ω
PEAKING
≤
0.5dB
PEAKING
≤
5dB
A
V
= 10
R
L
= 100Ω
– 3dB BANDWIDTH (MHz)
40
50
Bandwidth vs Supply Voltage
PEAKING
≤
0.5dB
PEAKING
≤
5dB
10k
A
V
= 10
R
L
= 10Ω
FEEDBACK RESISTOR (Ω)
Bandwidth and Feedback Resistance
vs Capacitive Load for 5dB Peak
100
BANDWIDTH
–3dB BANDWIDTH (MHz)
30
R
F
= 560Ω
R
F
= 680Ω
R
F
= 1k
1k
10
20
10
R
F
= 1.5k
100
0
4
6
14
12
10
8
SUPPLY VOLTAGE (±V)
16
18
1
FEEDBACK RESISTOR
A
V
= +2
R
L
=
∞
V
S
=
±15V
C
COMP
= 0.01µF
10
100
1k
CAPACITIVE LOAD (pF)
1
10k
LT1206 • TPC04
LT1206 • TPC05
LT1206 • TPC06
Differential Phase
vs Supply Voltage
0.50
R
L
= 15Ω
DIFFERENTIAL GAIN (%)
0.10
Differential Gain
vs Supply Voltage
100
SPOT NOISE (nV/√Hz OR pA/√Hz)
R
F
= R
G
= 560Ω
A
V
= 2
N PACKAGE
Spot Noise Voltage and Current
vs Frequency
DIFFERENTIAL PHASE (DEG)
0.40
0.08
R
L
= 15Ω
–i
n
0.30
0.20
R
F
= R
G
= 560Ω
A
V
= 2
N PACKAGE
0.06
R
L
= 30Ω
0.04
R
L
= 50Ω
10
e
n
i
n
1
10
R
L
= 30Ω
R
L
= 50Ω
R
L
= 150Ω
0.10
0.02
R
L
= 150Ω
0
5
7
11
13
9
SUPPLY VOLTAGE (±V)
15
0
5
7
11
13
9
SUPPLY VOLTAGE (±V)
15
100
1k
10k
FREQUENCY (Hz)
100k
LT1206 • TPC09
LT1206 • TPC07
LT1206 • TPC08
1206fa
5
测试/测量
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