1
LT1207
Dual 250mA/60MHz
Current Feedback Amplifier
S
FEATURE
s
250mA Minimum Output Drive Current
s
60MHz Bandwidth, A
V
= 2, R
L
= 100
s
900V/
s Slew Rate, A
V
= 2, R
L
= 50
s
0.02% Differential Gain, A
V
= 2, R
L
= 30
s
0.17
Differential Phase, A
V
= 2, R
L
= 30
s
High Input Impedance: 10M
s
Shutdown Mode: I
S
< 200
A per Amplifier
s
Stable with C
L
= 10,000pF
APPLICATIO S
U
s
ADSL/HDSL Drivers
s
Video Amplifiers
s
Cable Drivers
s
RGB Amplifiers
s
Test Equipment Amplifiers
s
Buffers
The LT
1207 is a dual version of the LT1206 high speed
current feedback amplifier. Like the LT1206, each CFA in
the dual has excellent video characteristics: 60MHz band-
width, 250mA minimum output drive current, 400V/
s
minimum slew rate, low differential gain (0.02% typ) and
low differential phase (0.17
typ). The LT1207 includes a
pin for an optional compensation network which stabi-
lizes the amplifier for heavy capacitive loads. Both ampli-
fiers have thermal and current limit circuits which protect
against fault conditions. These capabilities make the LT1207
well suited for driving difficult loads such as cables in video
or digital communication systems.
Operation is fully specified from
5V to
15V supplies.
Supply current is typically 20mA per amplifier. Two
micropower shutdown controls place each amplifier in a
high impedance low current mode, dropping supply
current to 200
A per amplifier. For reduced bandwidth
applications, supply current can be lowered by adding a
resistor in series with the Shutdown pin.
The LT1207 is manufactured on Linear Technology's
complementary bipolar process and is available in a low
thermal resistance 16-lead SO package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
N
U
D
U
ESCRIPTIO
HDSL Driver
+
1/2 LT1207
+
240
720
720
720
15k
15k
V
IN
+
0.1
F*
2.2
F**
5V
+
0.1
F*
2.2
F**
5V
62
62
L1
1207 TA01
1/2 LT1207
SHDN A
SHDN B
CERAMIC
TANTALUM
L1 = TRANSPOWER SMPT308
OR SIMILAR DEVICE
*
**
2
LT1207
A
U
G
W
A
W
U
W
A
R
BSOLUTE
XI
TI
S
W
U
U
PACKAGE/ORDER I FOR ATIO
Supply Voltage .....................................................
18V
Input Current per Amplifier ...............................
15mA
Output Short-Circuit Duration (Note 1) ....... Continuous
Specified Temperature Range (Note 2) ...... 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
ORDER PART
NUMBER
LT1207CS
Consult factory for Industrial and Military grade parts.
JA
= 40
C/W (NOTE 3)
V
CM
= 0,
5V
V
S
15V, pulse tested, V
SHDN A
= 0V, V
SHDN B
= 0V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
OS
Input Offset Voltage
T
A
= 25
C
3
10
mV
q
15
mV
Input Offset Voltage Drift
q
10
V/
C
I
IN
+
Noninverting Input Current
T
A
= 25
C
2
5
A
q
20
A
I
IN
Inverting Input Current
T
A
= 25
C
10
60
A
q
100
A
e
n
Input Noise Voltage Density
f = 10kHz, R
F
= 1k, R
G
= 10
, R
S
= 0
3.6
nV/
Hz
+ i
n
Input Noise Current Density
f = 10kHz, R
F
= 1k, R
G
= 10
, R
S
= 10k
2
pA/
Hz
i
n
Input Noise Current Density
f = 10kHz, R
F
= 1k, R
G
= 10
, R
S
= 10k
30
pA/
Hz
R
IN
Input Resistance
V
IN
=
12V, V
S
=
15V
q
1.5
10
M
V
IN
=
2V, V
S
=
5V
q
0.5
5
M
C
IN
Input Capacitance
V
S
=
15V
2
pF
Input Voltage Range
V
S
=
15V
q
12
13.5
V
V
S
=
5V
q
2
3.5
V
CMRR
Common Mode Rejection Ratio
V
S
=
15V, V
CM
=
12V
q
55
62
dB
V
S
=
5V, V
CM
=
2V
q
50
60
dB
Inverting Input Current
V
S
=
15V, V
CM
=
12V
q
0.1
10
A/V
Common Mode Rejection
V
S
=
5V, V
CM
=
2V
q
0.1
10
A/V
PSRR
Power Supply Rejection Ratio
V
S
=
5V to
15V
q
60
77
dB
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
+
IN A
+IN A
SHDN A
IN B
+IN B
SHDN B
V
+
V
+
OUT A
V
A
COMP A
OUT B
V
B
COMP B
V
+
3
LT1207
V
CM
= 0,
5V
V
S
15V, pulse tested, V
SHDN A
= 0V, V
SHDN B
= 0V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Noninverting Input Current
V
S
=
5V to
15V
q
30
500
nA/V
Power Supply Rejection
Inverting Input Current
V
S
=
5V to
15V
q
0.7
5
A/V
Power Supply Rejection
A
V
Large-Signal Voltage Gain
V
S
=
15V, V
OUT
=
10V, R
L
= 50
q
55
71
dB
V
S
=
5V, V
OUT
=
2V, R
L
= 25
q
55
68
dB
R
OL
Transresistance,
V
OUT
/
I
IN
V
S
=
15V, V
OUT
=
10V, R
L
= 50
q
100
260
k
V
S
=
5V, V
OUT
=
2V, R
L
= 25
q
75
200
k
V
OUT
Maximum Output Voltage Swing
V
S
=
15V, R
L
= 50
, T
A
= 25
C
11.5
12.5
V
q
10.0
V
V
S
=
5V, R
L
= 25
, T
A
= 25
C
2.5
3.0
V
q
2.0
V
I
OUT
Maximum Output Current
R
L
= 1
q
250
500
1200
mA
I
S
Supply Current per Amplifier
V
S
=
15V, V
SHDN
= 0V, T
A
= 25
C
20
30
mA
q
35
mA
Supply Current per Amplifier,
V
S
=
15V, T
A
= 25
C
12
17
mA
R
SHDN
= 51k (Note 4)
Positive Supply Current
V
S
=
15V, V
SHDN A
= 15V, V
SHDN B
= 15V
q
200
A
per Amplifier, Shutdown
Output Leakage Current, Shutdown
V
S
=
15V, V
SHDN
= 15V, V
OUT
= 0V
q
10
A
SR
Slew Rate (Note 5)
A
V
= 2, T
A
= 25
C
400
900
V/
s
Differential Gain (Note 6)
V
S
=
15V, R
F
= 560
, R
G
= 560
, R
L
= 30
0.02
%
Differential Phase (Note 6)
V
S
=
15V, R
F
= 560
, R
G
= 560
, R
L
= 30
0.17
DEG
BW
Small-Signal Bandwidth
V
S
=
15V, Peaking
0.5dB
60
MHz
R
F
= R
G
= 620
, R
L
= 100
V
S
=
15V, Peaking
0.5dB
52
MHz
R
F
= R
G
= 649
, R
L
= 50
V
S
=
15V, Peaking
0.5dB
43
MHz
R
F
= R
G
= 698
, R
L
= 30
V
S
=
15V, Peaking
0.5dB
27
MHz
R
F
= R
G
= 825
, R
L
= 10
Note 3: Thermal resistance
JA
varies from 40
C/W to 60
C/W depending
upon the amount of PC board metal attached to the device.
JA
is specified
for a 2500mm
2
test board covered with 2oz copper on both sides.
Note 4: R
SHDN
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
= 400
.
Note 6: NTSC composite video with an output level of 2V.
The
q
denotes specifications which apply for 0
C
T
A
70
C.
Note 1: 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 2: 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.
4
LT1207
S ALL-SIG AL BA DWIDTH
W
U
U
I
S
= 20mA per Amplifier Typical, Peaking
0.1dB
I
S
= 10mA per Amplifier Typical, Peaking
0.1dB
I
S
= 5mA per Amplifier Typical, Peaking
0.1dB
3dB BW
0.1dB BW
A
V
R
L
R
F
R
G
(MHz)
(MHz)
V
S
=
5V, R
SHDN
= 22.1k
1
150
604
604
21
10.5
30
715
715
14.6
7.4
10
681
681
10.5
6.0
1
150
768
20
9.6
30
866
14.1
6.7
10
825
9.8
5.1
2
150
634
634
20
9.6
30
750
750
14.1
7.2
10
732
732
9.6
5.1
10
150
100
11.1
16.2
5.8
30
100
11.1
13.4
7.0
10
100
11.1
9.5
4.7
3dB BW
0.1dB BW
A
V
R
L
R
F
R
G
(MHz)
(MHz)
V
S
=
15V, R
SHDN
= 121k
1
150
619
619
25
12.5
30
787
787
15.8
8.5
10
825
825
10.5
5.4
1
150
845
23
10.6
30
1k
15.3
7.6
10
1k
10
5.2
2
150
681
681
23
10.2
30
845
845
15
7.7
10
866
866
10
5.4
10
150
100
11.1
15.9
4.5
30
100
11.1
13.6
6
10
100
11.1
9.6
4.5
3dB BW
0.1dB BW
A
V
R
L
R
F
R
G
(MHz)
(MHz)
V
S
=
5V, R
SHDN
= 0
1
150
562
562
48
21.4
30
649
649
34
17
10
732
732
22
12.5
1
150
619
54
22.3
30
715
36
17.5
10
806
22.4
11.5
2
150
576
576
48
20.7
30
649
649
35
18.1
10
750
750
22.4
11.7
10
150
442
48.7
40
19.2
30
511
56.2
31
16.5
10
649
71.5
20
10.2
3dB BW
0.1dB BW
A
V
R
L
R
F
R
G
(MHz)
(MHz)
V
S
=
15V, R
SHDN
= 0
1
150
681
681
50
19.2
30
768
768
35
17
10
887
887
24
12.3
1
150
768
66
22.4
30
909
37
17.5
10
1k
23
12
2
150
665
665
55
23
30
787
787
36
18.5
10
931
931
22.5
11.8
10
150
487
536
44
20.7
30
590
64.9
33
17.5
10
768
84.5
20.7
10.8
3dB BW
0.1dB BW
A
V
R
L
R
F
R
G
(MHz)
(MHz)
V
S
=
5V, R
SHDN
= 10.2k
1
150
576
576
35
17
30
681
681
25
12.5
10
750
750
16.4
8.7
1
150
665
37
17.5
30
768
25
12.6
10
845
16.5
8.2
2
150
590
590
35
16.8
30
681
681
25
13.4
10
768
768
16.2
8.1
10
150
301
33.2
31
15.6
30
392
43.2
23
11.9
10
499
54.9
15
7.8
3dB BW
0.1dB BW
A
V
R
L
R
F
R
G
(MHz)
(MHz)
V
S
=
15V, R
SHDN
= 60.4k
1
150
634
634
41
19.1
30
768
768
26.5
14
10
866
866
17
9.4
1
150
768
44
18.8
30
909
28
14.4
10
1k
16.8
8.3
2
150
649
649
40
18.5
30
787
787
27
14.1
10
931
931
16.5
8.1
10
150
301
33.2
33
15.6
30
402
44.2
25
13.3
10
590
64.9
15.3
7.4
5
LT1207
TYPICAL PERFOR A CE CHARACTERISTICS
W U
Bandwidth and Feedback Resistance
vs Capacitive Load for 0.5dB Peak
Bandwidth vs Supply Voltage
Bandwidth vs Supply Voltage
Bandwidth vs Supply Voltage
Spot Noise Voltage and Current
vs Frequency
Bandwidth and Feedback Resistance
vs Capacitive Load for 5dB Peak
4
0
10
30
40
50
100
70
8
12
20
80
90
60
6
10
14
16
18
SUPPLY VOLTAGE (
V)
3dB BANDWIDTH (MHz)
LT1207 TPC01
PEAKING
0.5dB
PEAKING
5dB
R
F
= 470
R
F
= 560
R
F
= 680
R
F
= 750
R
F
= 1k
R
F
= 1.5k
A
V
= 2
R
L
= 100
4
0
20
50
8
12
10
40
30
6
10
14
16
18
SUPPLY VOLTAGE (
V)
3dB BANDWIDTH (MHz)
LT1207 TPC02
PEAKING
0.5dB
PEAKING
5dB
R
F
= 560
R
F
= 1k
R
F
= 2k
R
F
= 750
A
V
= 2
R
L
= 10
4
0
10
30
40
50
100
70
8
12
20
80
90
60
6
10
14
16
18
SUPPLY VOLTAGE (
V)
3dB BANDWIDTH (MHz)
LT1207 TPC04
PEAKING
0.5dB
PEAKING
5dB
R
F
= 470
R
F
= 1.5k
R
F
= 330
R
F
= 680
R
F
=390
A
V
= 10
R
L
= 100
4
0
20
50
8
12
10
40
30
6
10
14
16
18
SUPPLY VOLTAGE (
V)
3dB BANDWIDTH (MHz)
LT1207 TPC05
PEAKING
0.5dB
PEAKING
5dB
R
F
= 560
R
F
= 1k
R
F
= 1.5k
R
F
= 680
A
V
= 10
R
L
= 10
CAPACITIVE LOAD (pF)
FEEDBACK RESISTOR (
)
1
LT1207 TPC06
10
100
1k
10k
0
3dB BANDWIDTH (MHz)
1k
10k
0
100
10
100
1
FEEDBACK RESISTOR
BANDWIDTH
A
V
= +2
R
L
=
V
S
=
15V
C
COMP
= 0.01
F
FREQUENCY (Hz)
10
1
10
100
100
100k
LT1207 TPC09
1k
10k
SPOT NOISE (nV/
Hz OR pA/
Hz)
i
n
e
n
i
n
Bandwidth vs Supply Voltage
CAPACITIVE LOAD (pF)
1
100
FEEDBACK RESISTOR (
)
1k
10k
100
10000
LT1207 TPC03
10
1000
BANDWIDTH
FEEDBACK RESISTOR
A
V
= 2
R
L
=
V
S
=
15V
C
COMP
= 0.01
F
1
10
100
3dB BANDWIDTH (MHz)
Differential Phase
vs Supply Voltage
Differential Gain
vs Supply Voltage
SUPPLY VOLTAGE (
V)
5
DIFFERENTIAL PHASE (DEG)
0.30
0.40
0.50
13
LT1207 TPC07
0.20
0.10
0
7
9
11
15
R
F
= R
G
= 560
A
V
= 2
N PACKAGE
R
L
= 15
R
L
= 50
R
L
= 30
R
L
= 150
SUPPLY VOLTAGE (
V)
5
DIFFERENTIAL GAIN (%)
0.06
0.08
0.10
13
LT1207 TPC08
0.04
0.02
0
7
9
11
15
R
F
= R
G
= 560
A
V
= 2
N PACKAGE
R
L
= 15
R
L
= 30
R
L
= 150
R
L
= 50
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