LT1398/LT1399/LT1399HV
Low Cost Dual and Triple
300MHz Current Feedback
Amplifiers with Shutdown
FEATURES
DESCRIPTIO
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300MHz Bandwidth on 5V (A = 1, 2 and 1)
V
The LT 1399 and LT1399HV contain three independent
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0.1dB Gain Flatness: 150MHz (A = 1, 2 and 1)
V 300MHz current feedback amplifiers, each with a shut-
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Completely Off in Shutdown, 0m A Supply Current
down pin. The LT1399HV is a higher voltage version of the
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High Slew Rate: 800V/m s
LT1399. The LT1398 is a two amplifier version of the
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Wide Supply Range:
LT1399.
2V(4V) to 6V(12V) (LT1398/LT1399)
The LT1398/LT1399 operate on all supplies from a single
2V (4V) to 7.5V (15V) (LT1399HV)
4V to 6V. The LT1399HV operates on all supplies from 4V
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80mA Output Current
to 7.5V.
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Low Supply Current: 4.6mA/Amplifier
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Fast Turn-On Time: 30ns
Each amplifier draws 4.6mA when active. When disabled
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Fast Turn-Off Time: 40ns
each amplifier draws zero supply current and its output be-
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16-Pin Narrow SO/Narrow SSOP Packages
comes high impedance. The amplifiers turn on in only 30ns
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and turn off in 40ns, making them ideal in spread spectrum
APPLICATIO S
and portable equipment applications.
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RGB Cable Drivers The LT1398/LT1399/LT1399HV are manufactured on Lin-
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LCD Drivers ear Technologys proprietary complementary bipolar pro-
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Spread Spectrum Amplifiers
cess. The LT1399/LT1399HV are pin-for-pin upgrades to
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MUX Amplifiers the LT1260 optimized for use on 5V/ 7.5V supplies.
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, LTC and LT are registered trademarks of Linear Technology Corporation.
Composite Video Cable Drivers
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Portable Equipment
TYPICAL APPLICATIO
3-Input Video MUX Cable Driver
CHANNEL
A BC
SELECT
EN A
Square Wave Response
V +
IN A
97.6W
R
G
1/3 LT1399
200W
75W
R
F
CABLE
324W
V
OUT
OUTPUT
EN B
200mV/DIV
75W
V +
IN B
97.6W
R
G
1/3 LT1399
200W
R
F
324W
1398/99 TA02
R = 100W TIME (10ns/DIV)
L
R = R = 324W
F G
EN C
f = 10MHz
V +
IN C
97.6W
R 1399 TA01
G
1/3 LT1399
200W
R
F
324W
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ULT1398/LT1399/LT1399HV
(Note 1)
ABSOLUTEXAI U RATI GS
+
Total Supply Voltage (V to V ) Output Short-Circuit Duration (Note 3) ........ Continuous
LT1398/LT1399 ................................................ 12.6V Operating Temperature Range (Note 9)... 40 C to 85 C
LT1399HV ....................................................... 15.5V Specified Temperature Range (Note 4) .. 40 C to 85 C
Input Current (Note 2) ....................................... 10mA Storage Temperature Range ................ 65 C to 150 C
Output Current ................................................. 100mA Junction Temperature (Note 5)............................ 150 C
Differential Input Voltage (Note 2) ........................... 5V Lead Temperature (Soldering, 10 sec)................. 300 C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
ORDER PART
ORDER PART
TOP VIEW
NUMBER NUMBER
1 EN R
IN R 16
1 16 EN A
IN A
R
A
2 OUT R
+IN R 15
2 15 OUT A
+IN A
LT1398CS LT1399CGN
+
3 V
+ *GND 14
3 14 V
*GND
LT1399CS
4 EN G
IN G 13
4 GND*
*GND 13
G LT1399HVCS
5 OUT G
+IN G 12
5 GND*
*GND 12
LT1399IGN
6 V
*GND 11
6 V
*GND 11
LT1399IS
7 OUT B
+IN B 10
7 OUT B
+IN B 10
B
B
8 EN B
IN B 9
GN PART MARKING
8 EN B
IN B 9
GN PACKAGE S PACKAGE
S PACKAGE
1399
16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO
16-LEAD PLASTIC SO
T = 150 C, q = 120 C/W (GN)
1399I
JMAX JA
T = 150 C, q = 100 C/W
JMAX JA
T = 150 C, q = 100 C/W (S)
JMAX JA
*Ground pins are not internally connected. For best channel isolation, connect to ground. Consult factory for parts specified with wider operating
temperature ranges.
(LT1398/LT1399)
ELECTRICAL CHARACTERISTICS
The l denotes specifications which apply over the specified operating temperature range, otherwise specifications are at T = 25 C.
A
For each amplifier: V = 0V, V = 5V, EN = 0V, pulse tested, unless otherwise noted. (Note 4)
CM S
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V Input Offset Voltage 1.5 10 mV
OS
l 12 mV
D V /D T Input Offset Voltage Drift l 15 m V/ C
OS
+
I Noninverting Input Current 10 25 m A
IN
l 30 m A
I Inverting Input Current 10 50 m A
IN
l 60 m A
e Input Noise Voltage Density f = 1kHz, R = 1k, R = 10W , R = 0W 4.5 nV/ Hz
n F G S
+i Noninverting Input Noise Current Density f = 1kHz 6 pA/ Hz
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i Inverting Input Noise Current Density f = 1kHz 25 pA/ Hz
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R Input Resistance V = 3.5V l 0.3 1 MW
IN IN
C Input Capacitance Amplifier Enabled 2.0 pF
IN
Amplifier Disabled 2.5 pF
C Output Capacitance Amplifier Disabled 8.5 pF
OUT
V Input Voltage Range, High V = 5V l 3.5 4.0 V
INH S
V = 5V, 0V 4.0 V
S
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U W W W