LT1206
250mA/60MHz Current
Feedback Amplifi er
FEATURES
■
250mA Minimum Output Drive Current
■
60MHz Bandwidth, AV = 2, RL = 100Ω
■
900V/µs Slew Rate, AV = 2, RL = 50Ω
■
0.02% Differential Gain, AV = 2, RL = 30Ω
■
0.17° Differential Phase, AV = 2, RL = 30Ω
■
High Input Impedance, 10MΩ
■
Wide Supply Range, ±5V to ±15V
■
Shutdown Mode: IS < 200µA
■
Adjustable Supply Current
■
Stable with CL = 10,000p
■
Available in 8-Pin DIP and SO and 7-Pin DD and
TO-220 Packages
APPLICATIONS
■
Video Amplifi ers
■
Cable Drivers
■
RGB Amplifi ers
■
Test Equipment Amplifi ers
■
Buffers
DESCRIPTION
The LT®1206 is a current feedback amplifi er with high
output current drive capability and excellent video characteristics. 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 minimum 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.
TYPICAL APPLICATION
Noninverting Amplifi er with Shutdown
15V
V
ENABLE
+
IN
V
OUT
R
F
OPTIONAL, USE WITH CAPACITIVE LOADS
*
R
G
GROUND SHUTDOWN PIN FOR
**
NORMAL OPERATION
5V
LT1206
S/D**
–
74C906
LT1206 • TA01
–15V
15V
COMP
24k
C
COMP
0.01µF*
Large-Signal Response, CL = 10,000pF
= ±15V
V
S
= RG = 3k
R
L
= ∞
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
Specifi ed Temperature Range (Note 3) ........0°C to 70°C
PACKAGE/OERDER INFORMATION
TOP VIEW
NC
1
–IN
2
+IN
3
S/D*
4
N8 PACKAGE
8-LEAD PLASTIC DIP
θJA = 100°C/W
ORDER PART NUMBER ORDER PART NUMBER S8 PART MARKING
LT1206CN8** LT1206CS8** 1206
FRONT VIEW
7
6
5
4
3
TAB IS
+
V
R PACKAGE
7-LEAD PLASTIC DD
2
1
θJA = 30°C/W
+
V
8
OUT
7
–
V
6
COMP
5
OUT
–
V
COMP
+
V
S/D*
+IN
–IN
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
TOP VIEW
+
8
V
OUT
7
–
V
6
COMP
5
OUT
–
V
COMP
+
V
S/D*
+IN
–IN
TAB IS
+
V
+
V
1
–IN
2
+IN
3
S/D*
4
S8 PACKAGE
8-LEAD PLASTIC SO
θJA = 60°C/W
FRONT VIEW
T7 PACKAGE
7-LEAD PLASTIC TO-220
θJA = 5°C/W
7
6
5
4
3
2
1
ORDER PART NUMBER ORDER PART NUMBER
LT1206CR** LT1206CT7**
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/
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *Ground shutdown pin for normal operation. ** See Note 3.
ELECTRICAL CHARACTERISTICS
The
temperature range, otherwise specifi cations are at T
= 25°C. VCM = 0, ±5V ≤ VS ≤ 15V, pulse tested, V
A
●
denotes the specifi cations which apply over the full operating
= 0V, unless otherwise noted.
S/D
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
+
I
IN
–
I
IN
Input Offset Voltage
Input Offset Voltage Drift
Noninverting Input Current
Inverting Input Current
●
●
●
●
±3 ±10
±15
mV
mV
10 µV/°C
±2 ±8
±25
±10 ±60
±100
1206fa
µA
µA
µA
µA
2
LT1206
ELECTRICAL CHARACTERISTICS
The
temperature range, otherwise specifi cations are at T
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
e
n
+i
n
–i
n
R
IN
C
IN
CMRR Common Mode Rejection Ratio V
PSRR Power Supply Rejection Ratio V
A
V
R
OL
V
OUT
I
OUT
I
S
SR Slew Rate (Note 5) A
BW Small-Signal Bandwidth V
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.
Input Noise Voltage Density f = 10kHz, RF = 1k, RG = 10Ω, RS = 0Ω 3.6 nV/√Hz
Input Noise Current Density f = 10kHz, RF = 1k, RG = 10Ω, RS = 10k 2 pA/√Hz
Input Noise Current Density f = 10kHz, RF = 1k, RG = 10Ω, RS = 10k 30 pA/√Hz
Input Resistance VIN = ±12V, VS = ±15V
Input Capacitance VS = ±15V 2 pF
Input Voltage Range V
Inverting Input Current Common Mode
Rejection
Noninverting Input Current Power Supply
Rejection
Inverting Input Current Power Supply
Rejection
Large-Signal Voltage Gain VS = ±15V, V
Transresistance, ΔV
OUT
/ΔI
–
IN
Maximum Output Voltage Swing VS = ±15V, RL = 50Ω
Maximum Output Current RL = 1Ω
Supply Current VS = ±15V, V
Supply Current, R
= 51k (Note 4) VS = ±15V 12 17 mA
S/D
Positive Supply Current, Shutdown V
Output Leakage Current, Shutdown V
Differential Gain (Note 6) V
Differential Phase (Note 6) V
= 25°C. VCM = 0, ±5V ≤ VS ≤ 15V, pulse tested, V
A
V
= ±2V, VS = ±5V
IN
= ±15V
S
V
= ±5V
S
= ±15V, VCM = ±12V
S
V
= ±5V, VCM = ±2V
S
= ±15V, VCM = ±12V
V
S
V
= ±5V, VCM = ±2V
S
= ±5V to ±15V
S
= ±5V to ±15V
V
S
= ±5V to ±15V
V
S
V
= ±5V, V
S
VS = ±15V, V
V
= ±5V, V
S
= ±15V, RL = 25Ω
V
S
= ±15V, V
S
= ±15V, V
S
= 2 400 900 V/µs
V
= ±15V, RF = 560Ω, RG = 560Ω, RL = 30Ω 0.02 %
S
= ±15V, RF = 560Ω, RG = 560Ω, RL = 30Ω 0.17 Deg
S
= ±15V, Peaking ≤ 0.5dB,
S
R
= RG = 620Ω, RL = 100Ω
F
= ±15V, Peaking ≤ 0.5dB,
V
S
R
= RG = 649Ω, RL = 50Ω
F
= ±15V, Peaking ≤ 0.5dB,
V
S
R
= RG = 698Ω, RL = 30Ω
F
= ±15V, Peaking ≤ 0.5dB,
V
S
= RG = 825Ω, RL = 10Ω
R
F
●
denotes the specifi cations which apply over the full operating
= 0V, unless otherwise noted.
S/D
●
= ±10V, RL = 50Ω
OUT
= ±2V, RL = 25Ω
OUT
= ±10V, RL = 50Ω
OUT
= ±2V, RL = 25Ω
OUT
= 0V
S/D
= 15V
S/D
= 15V
S/D
1.5
●
0.5
●
±12±2±13.5
●
●
55
●
50
●
●
●
60 77 dB
●
●
●
55
●
55
●
100
●
75
±11.5
●
±10.0
±2.5
●
±2.0
●
250 500 1200 mA
●
●
●
10
5
±3.5
62
60
0.1
0.1
30 500 nA/V
0.7 5 µA/V
71
68
260
200
±12.5 V
±3.0 V
20 30
60 MHz
52 MHz
43 MHz
27 MHz
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
is connected between the shutdown pin and ground.
S/D
Note 5: Slew rate is measured at ±5V on a ±10V output signal while
operating on ±15V supplies with R
= 1.5k, RG = 1.5k and RL = 400Ω.
F
Note 6: NTSC composite video with an output level of 2V.
MΩ
MΩ
10
10
µA/V
µA/V
kΩ
kΩ
mA
35
mA
200 µA
10 µA
1206fa
V
V
dB
dB
dB
dB
V
V
3
LT1206
SMALL-SIGNAL BANDWIDTH
IS = 20mA Typical, Peaking ≤ 0.1dB
–3dB BW
(MHz)
48
34
22
54
36
22.4
48
35
22.4
40
31
20
–3dB BW
(MHz)
35
25
16.4
37
25
16.5
35
25
16.2
31
23
15
S/D
R
L
= 0Ω
A
V
= ±5V, R
S
V
–1 150
30
10
1 150
30
10
2 150
30
10
10 150
30
10
I
= 10mA Typical, Peaking ≤ 0.1dB
S
A
V
VS = ±5V, R
R
= 10.2k
S/D
L
–1 150
30
10
1 150
30
10
2 150
30
10
10 150
30
10
R
562
649
732
619
715
806
576
649
750
442
511
649
R
576
681
750
665
768
845
590
681
768
301
392
499
F
F
R
G
562
649
732
–
–
–
576
649
750
48.7
56.2
71.5
R
G
576
681
750
–
–
–
590
681
768
33.2
43.2
54.9
–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
–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
V
= ±15V, R
S
–1 150
1 150
2 150
10 150
A
V
VS = ±15V, R
–1 150
1 150
2 150
10 150
R
= 0Ω
S/D
30
10
30
10
30
10
30
10
R
= 60.4k
S/D
30
10
30
10
30
10
30
10
–3dB BW
L
R
F
681
768
887
768
909
1k
665
787
931
487
590
768
R
681
768
887
–
–
–
665
787
931
536
64.9
84.5
G
(MHz)
50
35
24
66
37
23
55
36
22.5
44
33
20.7
–3dB BW
L
R
F
634
768
866
768
909
1k
649
787
931
301
402
590
R
634
768
866
–
–
–
649
787
931
33.2
44.2
64.9
G
(MHz)
41
26.5
17
44
28
16.8
40
27
16.5
33
25
15.3
–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
–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
I
= 5mA Typical, Peaking ≤ 0.1dB
S
A
V
VS = ±5V, R
–1 150
1 150
2 150
10 150
R
= 22.1k
S/D
30
10
30
10
30
10
30
10
L
R
F
604
715
681
768
866
825
634
750
732
100
100
100
4
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
VS = ±15V, R
–1 150
1 150
2 150
10 150
R
S/D
30
10
30
10
30
10
30
10
L
= 121k
R
619
787
825
845
1k
1k
681
845
866
100
100
100
–3dB BW
F
R
G
619
787
825
–
–
–
681
845
866
11.1
11.1
11.1
(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
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TYPICAL PERFORMANCE CHARACTERISTICS
Bandwidth vs Supply Voltage
100
90
80
70
60
50
40
30
– 3dB BANDWIDTH (MHz)
20
10
0
PEAKING ≤ 0.5dB
PEAKING ≤ 5dB
RF = 470Ω
RF = 560Ω
4
610
8
SUPPLY VOLTAGE (±V)
Bandwidth vs Supply Voltage
100
90
80
70
60
50
40
30
–3dB BANDWIDTH (MHz)
20
10
0
PEAKING ≤ 0.5dB
PEAKING ≤ 5dB
RF =390Ω
4
610
8
SUPPLY VOLTAGE (±V)
12
12
AV = 2
= 100Ω
R
L
RF = 680Ω
RF = 750Ω
RF = 1.5k
14
LT1206 • TPC01
AV = 10
= 100Ω
R
L
RF = 330Ω
RF = 470Ω
RF = 680Ω
RF = 1.5k
14
LT1206 • TPC04
RF = 1k
16
16
18
18
Bandwidth vs Supply Voltage
50
40
30
20
–3dB BANDWIDTH (MHz)
10
0
PEAKING ≤ 0.5dB
PEAKING ≤ 5dB
RF = 560Ω
RF = 750Ω
RF = 1k
RF = 2k
4
610
8
SUPPLY VOLTAGE (±V)
Bandwidth vs Supply Voltage
50
40
30
20
– 3dB BANDWIDTH (MHz)
10
0
PEAKING ≤ 0.5dB
PEAKING ≤ 5dB
4
610
8
SUPPLY VOLTAGE (±V)
AV = 2
R
L
14
12
LT1206 • TPC02
AV = 10
R
L
RF = 560Ω
RF = 680Ω
RF = 1k
RF = 1.5k
14
12
LT1206 • TPC05
= 10Ω
16
= 10Ω
16
LT1206
Bandwidth and Feedback Resistance
vs Capacitive Load for 0.5dB Peak
10k
BANDWIDTH
1k
FEEDBACK RESISTOR
FEEDBACK RESISTOR (Ω)
18
100
= 2
A
V
= ∞
R
L
= ±15V
V
S
= 0.01µF
C
COMP
100 10000
1
10 1000
CAPACITIVE LOAD (pF)
LT1206 • TPC03
Bandwidth and Feedback Resistance
vs Capacitive Load for 5dB Peak
10k
BANDWIDTH
1k
FEEDBACK RESISTOR (Ω)
FEEDBACK RESISTOR
0100
18
0
1
10 100 1k 10k
CAPACITIVE LOAD (pF)
AV = +2
= ∞
R
L
= ±15V
V
S
C
COMP
= 0.01µF
LT1206 • TPC06
100
–3dB BANDWIDTH (MHz)
10
1
100
–3dB BANDWIDTH (MHz)
10
1
Differential Phase
vs Supply Voltage
0.50
0.40
0.30
RF = RG = 560Ω
= 2
A
V
N PACKAGE
0.20
DIFFERENTIAL PHASE (DEG)
0.10
0
7
5
9
SUPPLY VOLTAGE (±V)
Differential Gain
vs Supply Voltage
0.10
RL = 15Ω
RL = 30Ω
RL = 50Ω
RL = 150Ω
11
13
15
LT1206 • TPC07
0.08
0.06
0.04
DIFFERENTIAL GAIN (%)
0.02
0
RL = 15Ω
RL = 30Ω
RL = 150Ω
7
5
9
SUPPLY VOLTAGE (±V)
RL = 50Ω
RF = RG = 560Ω
= 2
A
V
N PACKAGE
11
13
LT1206 • TPC08
15
Spot Noise Voltage and Current
vs Frequency
100
–i
n
10
e
n
i
SPOT NOISE (nV/√Hz OR pA/√Hz)
1
10
100 100k
n
1k 10k
FREQUENCY (Hz)
LT1206 • TPC09
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5
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