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Электронный компонент: LT1397

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1
LT1395/LT1396/LT1397
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
Single/Dual/Quad 400MHz
Current Feedback Amplifier
The LT
1395/LT1396/LT1397 are single/dual/quad
400MHz current feedback amplifiers with an 800V/
s slew
rate and the ability to drive up to 80mA of output current.
The LT1395/LT1396/LT1397 operate on all supplies from
a single 4V to
6V. At
5V, they draw 4.6mA of supply
current per amplifier.
The LT1395/LT1396/LT1397 are manufactured on Linear
Technology's proprietary complementary bipolar process.
They have standard single/dual/quad pinouts and they are
optimized for use on supply voltages of
5V.
s
400MHz Bandwidth on
5V (A
V
= 1)
s
350MHz Bandwidth on
5V (A
V
= 2, 1)
s
0.1dB Gain Flatness: 100MHz (A
V
= 1, 2 and 1)
s
High Slew Rate: 800V/
s
s
Wide Supply Range:
2V(4V) to
6V(12V)
s
80mA Output Current
s
Low Supply Current: 4.6mA/Amplifier
s
LT1395: SO-8 Package
LT1396: SO-8 and MSOP Packages
LT1397: SO-14 and SSOP-16 Packages
s
Cable Drivers
s
Video Amplifiers
s
MUX Amplifiers
s
High Speed Portable Equipment
s
IF Amplifiers
Unity-Gain Video Loop-Through Amplifier
Loop-Through Amplifier
Frequency Response
, LTC and LT are registered trademarks of Linear Technology Corporation.
+
V
OUT
1395/6/7 TA01
12.1k
0.67pF
R
F2
255
1% RESISTORS
FOR A GAIN OF G:
V
OUT
= G (V
IN+
V
IN
)
R
F1
= R
F2
R
G1
= (G + 3) R
F2
R
G2
=
TRIM CMRR WITH R
G1
HIGH INPUT RESISTANCE DOES NOT LOAD CABLE
EVEN WHEN POWER IS OFF
1/2
LT1396
R
F2
G + 3
R
G2
63.4
R
F1
255
R
G1
1.02k
+
1/2
LT1396
3.01k
3.01k
12.1k
V
IN
V
IN+
BNC INPUTS
0.67pF
FREQUENCY (Hz)
100
60
GAIN (dB)
50
40
30
20
10
10
1k
10k
100k
1G
1395/6/7 TA02
1M
10M 100M
0
COMMON MODE SIGNAL
NORMAL SIGNAL
2
LT1395/LT1396/LT1397
A
U
G
W
A
W
U
W
A
R
BSOLUTE
XI
TI
S
Total Supply Voltage (V
+
to V
) ........................... 12.6V
Input Current (Note 2) .......................................
10mA
Output Current .................................................
100mA
Differential Input Voltage (Note 2) ...........................
5V
Output Short-Circuit Duration (Note 3) ........ Continuous
W
U
U
PACKAGE/ORDER I FOR ATIO
ORDER PART NUMBER
LT1397CS
T
JMAX
= 150
C,
JA
= 100
C/W
Consult factory for Industrial and Military grade parts.
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUT A
IN A
+IN A
V
+
+IN B
IN B
OUT B
OUT D
IN D
+IN D
V
+IN C
IN C
OUT C
+
+
+
+
Operating Temperature Range (Note 4) . 40
C to 85
C
Specified Temperature Range (Note 5) .. 40
C to 85
C
Storage Temperature Range ................ 65
C to 150
C
Junction Temperature (Note 6) ............................ 150
C
Lead Temperature (Soldering, 10 sec)................. 300
C
(Note 1)
1
2
3
4
8
7
6
5
TOP VIEW
NC
V+
OUT
NC
NC
IN
+IN
V
S8 PACKAGE
8-LEAD PLASTIC SO
+
1
2
3
4
8
7
6
5
TOP VIEW
V+
OUT B
IN A
+IN B
OUT A
IN A
+IN A
V
S8 PACKAGE
8-LEAD PLASTIC SO
+
+
1
2
3
4
OUT A
IN A
+IN A
V
8
7
6
5
V+
OUT B
IN A
+IN B
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
+
+
1
2
3
4
5
6
7
8
TOP VIEW
GN PACKAGE
16-LEAD PLASTIC SSOP
16
15
14
13
12
11
10
9
OUT A
IN A
+IN A
V
+
+IN B
IN B
OUT B
NC
OUT D
IN D
+IN D
V
+IN C
IN C
OUT C
NC
+
+
+
+
ORDER PART NUMBER
LT1396CMS8
T
JMAX
= 150
C,
JA
= 250
C/W
ORDER PART NUMBER
LT1395CS8
T
JMAX
= 150
C,
JA
= 150
C/W
ORDER PART NUMBER
LT1396CS8
T
JMAX
= 150
C,
JA
= 150
C/W
ORDER PART NUMBER
LT1397CGN
T
JMAX
= 150
C,
JA
= 135
C/W
MS8 PART MARKING
LTDY
S8 PART MARKING
1395
S8 PART MARKING
1396
GN PART MARKING
1397
3
LT1395/LT1396/LT1397
ELECTRICAL C
C
HARA TERISTICS
The
q
denotes specifications which apply over the specified operating temperature range, otherwise specifications are at T
A
= 25
C.
For each amplifier: V
CM
= 0V, V
S
=
5V, pulse tested, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
OS
Input Offset Voltage
1
10
mV
q
12
mV
V
OS
/
T
Input Offset Voltage Drift
q
15
V/
C
I
IN
+
Noninverting Input Current
10
25
A
q
30
A
I
IN
Inverting Input Current
10
50
A
q
60
A
e
n
Input Noise Voltage Density
f = 1kHz, R
F
= 1k, R
G
= 10
, R
S
= 0
4.5
nV/
Hz
+ i
n
Noninverting Input Noise Current Density
f = 1kHz
6
pA/
Hz
i
n
Inverting Input Noise Current Density
f = 1kHz
25
pA/
Hz
R
IN
Input Resistance
V
IN
=
3.5V
q
0.3
1
M
C
IN
Input Capacitance
2.0
pF
V
INH
Input Voltage Range, High
V
S
=
5V
q
3.5
4.0
V
V
S
= 5V, 0V
4.0
V
V
INL
Input Voltage Range, Low
V
S
=
5V
q
4.0
3.5
V
V
S
= 5V, 0V
1.0
V
V
OUTH
Output Voltage Swing, High
V
S
=
5V
3.9
4.2
V
V
S
=
5V
q
3.7
V
V
S
= 5V, 0V
4.2
V
V
OUTL
Output Voltage Swing, Low
V
S
=
5V
4.2
3.9
V
V
S
=
5V
q
3.7
V
V
S
= 5V, 0V
0.8
V
V
OUTH
Output Voltage Swing, High
V
S
=
5V, R
L
= 150
3.4
3.6
V
V
S
=
5V, R
L
= 150
q
3.2
V
V
S
= 5V, 0V; R
L
= 150
3.6
V
V
OUTL
Output Voltage Swing, Low
V
S
=
5V, R
L
= 150
3.6
3.4
V
V
S
=
5V, R
L
= 150
q
3.2
V
V
S
= 5V, 0V; R
L
= 150
0.6
V
CMRR
Common Mode Rejection Ratio
V
CM
=
3.5V
q
42
52
dB
I
CMRR
Inverting Input Current
V
CM
=
3.5V
10
16
A/V
Common Mode Rejection
V
CM
=
3.5V
q
22
A/V
PSRR
Power Supply Rejection Ratio
V
S
=
2V to
5V
q
56
70
dB
+ I
PSRR
Noninverting Input Current
V
S
=
2V to
5V
1
2
A/V
Power Supply Rejection
q
3
A/V
I
PSRR
Inverting Input Current
V
S
=
2V to
5V
q
2
7
A/V
Power Supply Rejection
A
V
Large-Signal Voltage Gain
V
OUT
=
2V, R
L
= 150
50
65
dB
R
OL
Transimpedance,
V
OUT
/
I
IN
V
OUT
=
2V, R
L
= 150
40
100
k
I
OUT
Maximum Output Current
R
L
= 0
q
80
mA
I
S
Supply Current per Amplifier
q
4.6
6.5
mA
SR
Slew Rate (Note 7)
A
V
= 1, R
L
= 150
500
800
V/
s
3dB BW
3dB Bandwidth
A
V
= 1, R
F
= 374
, R
L
= 100
400
MHz
A
V
= 2, R
F
= R
G
= 255
, R
L
= 100
300
MHz
0.1dB BW
0.1dB Bandwidth
A
V
= 1, R
F
= 374
, R
L
= 100
100
MHz
A
V
= 2, R
F
= R
G
= 255
, R
L
= 100
100
MHz
4
LT1395/LT1396/LT1397
Closed-Loop Gain vs Frequency
(A
V
= 1)
0
2
4
6
GAIN (dB)
1M
10M
1G
100M
FREQUENCY (Hz)
V
S
=
5V
V
IN
= 10dBm
R
F
= 374
R
L
= 100
1397 G01
Closed-Loop Gain vs Frequency
(A
V
= 1)
V
S
=
5V
V
IN
= 10dBm
R
F
= R
G
= 280
R
L
= 100
GAIN (dB)
1M
10M
1G
100M
FREQUENCY (Hz)
Closed-Loop Gain vs Frequency
(A
V
= 2)
V
S
=
5V
V
IN
= 10dBm
R
F
= R
G
= 255
R
L
= 100
6
4
2
0
GAIN (dB)
1M
10M
1G
100M
FREQUENCY (Hz)
1397 G02
1397 G03
0
2
4
6
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ELECTRICAL C
C
HARA TERISTICS
The
q
denotes specifications which apply over the specified operating temperature range, otherwise specifications are at T
A
= 25
C.
For each amplifier: V
CM
= 0V, V
S
=
5V, pulse tested, unless otherwise noted. (Note 5)
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: This parameter is guaranteed to meet specified performance
through design and characterization. It has not been tested.
Note 3: A heat sink may be required depending on the power supply
voltage and how many amplifiers have their outputs short circuited.
Note 4: The LT1395C/LT1396C/LT1397C are guaranteed functional over
the operating temperature range of 40
C to 85
C.
Note 5: The LT1395C/LT1396C/LT1397C are guaranteed to meet specified
performance from 0
C to 70
C. The LT1395C/LT1396C/LT1397C are
designed, characterized and expected to meet specified performance from
40
C and 85
C but is not tested or QA sampled at these temperatures.
For guaranteed I-grade parts, consult the factory.
Note 6: T
J
is calculated from the ambient temperature T
A
and the
power dissipation P
D
according to the following formula:
LT1395CS8: T
J
= T
A
+ (P
D
150
C/W)
LT1396CS8: T
J
= T
A
+ (P
D
150
C/W)
LT1396CMS8: T
J
= T
A
+ (P
D
250
C/W)
LT1397CS14: T
J
= T
A
+ (P
D
100
C/W)
LT1397CGN16: T
J
= T
A
+ (P
D
135
C/W)
Note 7: Slew rate is measured at
2V on a
3V output signal.
Note 8: Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R Video
Measurement Set. The resolution of this equipment is 0.1% and 0.1
.
Ten identical amplifier stages were cascaded giving an effective
resolution of 0.01% and 0.01
.
SMALL SIGNAL
SMALL SIGNAL
SMALL SIGNAL
V
S
(V)
A
V
R
L
(
)
R
F
(
)
R
G
(
)
3dB BW (MHz)
0.1dB BW (MHz)
PEAKING (dB)
5
1
100
374
400
100
0.1
5
2
100
255
255
350
100
0.1
5
1
100
280
280
350
100
0.1
TYPICAL AC PERFOR A CE
W U
t
r
, t
f
Small-Signal Rise and Fall Time
R
F
= R
G
= 255
, R
L
= 100
, V
OUT
= 1V
P-P
1.3
ns
t
PD
Propagation Delay
R
F
= R
G
= 255
, R
L
= 100
, V
OUT
= 1V
P-P
2.5
ns
os
Small-Signal Overshoot
R
F
= R
G
= 255
, R
L
= 100
, V
OUT
= 1V
P-P
10
%
t
S
Settling Time
0.1%, A
V
= 1, R
F
= R
G
= 280
, R
L
= 150
25
ns
dG
Differential Gain (Note 8)
R
F
= R
G
= 255
, R
L
= 150
0.02
%
dP
Differential Phase (Note 8)
R
F
= R
G
= 255
, R
L
= 150
0.04
DEG
C
C
HARA TERISTICS
U
W
A
TYPICAL PERFOR
CE
5
LT1395/LT1396/LT1397
Large-Signal Transient Response
(A
V
= 1)
OUTPUT (1V/DIV)
TIME (10ns/DIV)
V
S
=
5V
V
IN
=
2.5V
R
F
= R
G
= 280
R
L
= 100
1395/6/7 G06
Large-Signal Transient Response
(A
V
= 2)
OUTPUT (1V/DIV)
TIME (10ns/DIV)
V
S
=
5V
V
IN
=
1.25V
R
F
= R
G
= 255
R
L
= 100
1395/6/7 G05
Large-Signal Transient Response
(A
V
= 1)
OUTPUT (1V/DIV)
TIME (10ns/DIV)
V
S
=
5V
V
IN
=
2.5V
R
F
= 374
R
L
= 100
1395/6/7 G04
C
C
HARA TERISTICS
U
W
A
TYPICAL PERFOR
CE
PSRR vs Frequency
Maximum Undistorted Output
Voltage vs Frequency
2nd and 3rd Harmonic Distortion
vs Frequency
FREQUENCY (Hz)
90
DISTORTION (dB)
80
60
40
30
1k
100k
1M
100M
1397 G07
100
10k
10M
50
70
110
HD2
HD3
T
A
= 25
C
R
F
= R
G
= 255
R
L
= 100
V
S
=
5V
V
OUT
= 2VPP
FREQUENCY (Hz)
1M
2
OUTPUT VOLTAGE (V
P-P
)
3
4
5
6
8
10M
100M
1397 G08
7
A
V
= +1
A
V
= +2
T
A
= 25
C
R
F
= 374
(A
V
= 1)
R
F
= R
G
= 255
(A
V
= 2)
R
L
= 100
V
S
=
5V
FREQUENCY (Hz)
20
PSRR (dB)
40
50
70
80
10k
1M
10M
100M
1397 G09
0
100k
60
30
10
+ PSRR
PSRR
T
A
= 25
C
R
F
= R
G
= 255
R
L
= 100
A
V
= +2
Input Voltage Noise and Current
Noise vs Frequency
FREQUENCY (Hz)
10
INPUT NOISE (nV/
Hz OR pA/
Hz)
10
100
1000
30
100 300
1k
3k
10k 30k 100k
1397 G10
1
i
n
+i
n
e
n
FREQUENCY (Hz)
10k
0.01
OUTPUT IMPEDANCE (
)
1
100
1M
10M
100k
100M
1397 G11
0.1
10
R
F
= R
G
= 255
R
L
= 50
A
V
= +2
V
S
=
5V
Output Impedance vs Frequency
Maximum Capacitive Load
vs Feedback Resistor
FEEDBACK RESISTANCE (
)
300
1
CAPACITIVE LOAD (pF)
10
100
1000
900
1500
2100
2700
3300
1397 G13
R
F
= R
G
A
V
= +2
V
S
=
5V
PEAKING
5dB