LT1395/LT1396/LT1397
Single/Dual/Quad 400MHz
Current Feedback Amplifier
FEATURES
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DESCRIPTIO
400MHz Bandwidth on
±
5V (A
V
= 1)
350MHz Bandwidth on
±
5V (A
V
= 2, –1)
0.1dB Gain Flatness: 100MHz (A
V
= 1, 2 and –1)
High Slew Rate: 800V/µs
Wide Supply Range:
±2V(4V)
to
±6V(12V)
80mA Output Current
Low Supply Current: 4.6mA/Amplifier
LT1395: SO-8, TSOT23-5 and TSOT23-6 Packages
LT1396: SO-8, MSOP and Tiny 3mm
×
3mm
×
0.75mm DFN-8 Packages
LT1397: SO-14, SSOP-16 and Tiny 4mm
×
3mm
×
0.75mm DFN-14 Packages
The LT
®
1395/LT1396/LT1397 are single/dual/quad
400MHz current feedback amplifiers with an 800V/µs 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 LT1395CS6 also adds a shut-
down pin. When disabled, the LT1395CS6 draws virtually
zero supply current and its output becomes high imped-
ance. The LT1395CS6 will turn on in only 30ns and turn off
in 40ns, making it ideal in spread spectrum and portable
equipment applications.
For space limited applications, the LT1395 is available in
TSOT-23 packages, the LT1396 is available in a tiny 3mm
×
3mm
×
0.75mm dual fine pitch leadless DFN package,
and the LT1397 is available in a tiny 4mm
×
3mm
×
0.75mm DFN package.
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.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
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Cable Drivers
Video Amplifiers
MUX Amplifiers
High Speed Portable Equipment
IF Amplifiers
TYPICAL APPLICATIO
R
G1
1.02k
R
F1
255Ω
Unity-Gain Video Loop-Through Amplifier
R
G2
63.4Ω
R
F2
255Ω
10
0
–
3.01k
V
IN –
1/2
LT1396
–
3.01k V
IN+
1/2
LT1396
–10
GAIN (dB)
V
OUT
–20
–30
–40
+
0.67pF
+
0.67pF
12.1k
12.1k
HIGH INPUT RESISTANCE
DOES NOT LOAD CABLE
EVEN WHEN POWER IS OFF
BNC INPUTS
1% RESISTORS
FOR A GAIN OF G:
V
OUT
= G (V
IN+
– V
IN –
)
R
F1
= R
F2
R
G1
= (5G – 1) R
F2
R
F2
R
G2
=
(5G – 1)
TRIM CMRR WITH R
G1
1395/6/7 TA01
–50
–60
100
U
Loop-Through Amplifier
Frequency Response
NORMAL SIGNAL
COMMON MODE SIGNAL
1k
10k 100k
U
U
1M
10M 100M
1G
1395/6/7 TA02
FREQUENCY (Hz)
139567fc
1
LINER [ LINEAR TECHNOLOGY ]
