LT1396_15 Datasheet, PDF (1/20 Pages) Linear Technology – Single/Dual/Quad 400MHz Current Feedback Amplifier

LT1395/LT1396/LT1397
Single/Dual/Quad 400MHz
Current Feedback Amplifier
FEATURES
DESCRIPTION
n _{400MHz Bandwidth on ± 5V (AV = 1)}
n _{350MHz Bandwidth on ±5V (AV = 2, –1)}
n _{0.1dB Gain Flatness: 100MHz (AV = 1, 2 and –1)}
n _{High Slew Rate: 800V/μs}
n _{Wide Supply Range: ±2V(4V) to ±6V(12V)}
n _{80mA Output Current}
n _{Low Supply Current: 4.6mA/Amplifier}
n _{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
n _{Low Profile (1mm) ThinSOT™ Package}
APPLICATIONS
n _{Cable Drivers}
n _{Video Amplifiers}
n _{MUX Amplifiers}
n _{High Speed Portable Equipment}
n _{IF Amplifiers}
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 cur-
rent per amplifier. The LT1395CS6 also adds a shutdown
pin. When disabled, the LT1395CS6 draws virtually zero
supply current and its output becomes high impedance.
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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Unity-Gain Video Loop-Through Amplifier
R_G1
1.02k
R_F1
255Ω
R_G2
63.4Ω
R_F2
255Ω
–
1/2
3.01k VIN– LT1396
+
0.67pF
12.1k
HIGH INPUT RESISTANCE
DOES NOT LOAD CABLE
EVEN WHEN POWER IS OFF
–
3.01k ^VIN+
1/2
LT1396
V_OUT
+
1% RESISTORS
FOR A GAIN OF G:
0.67pF
BNC INPUTS
12.1k
V_OUT = G (V_IN+ – V_IN–)
R_F1 = R_F2
R_G1 = (5G – 1) R_F2
R_G2
=
R_F2
(5G – 1)
TRIM CMRR WITH R_G1
1395/6/7 TA01
Loop-Through Amplifier
Frequency Response
10
0
NORMAL SIGNAL
–10
–20
–30
–40
COMMON MODE SIGNAL
–50
–60
100 1k
10k 100k 1M 10M 100M 1G
FREQUENCY (Hz)
1395/6/7 TA02
139567fd
1