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LT1227CS8 Datasheet Download

Part No.:
LT1227CS8
Download:
Download Datasheet
Description:
[140MHz Video Current Feedback Amplifier]
File Size:
327 K
Page:
12 Pages
Logo:
Manufacturer:
LINER [ LINEAR TECHNOLOGY ]
PCB Prototype
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LT1227
140MHz Video Current
Feedback Amplifier
FEATURES
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DESCRIPTIO
140MHz Bandwidth: A
V
= 2, R
L
= 150Ω
1100V/µs Slew Rate
Low Cost
30mA Output Drive Current
0.01% Differential Gain
0.01° Differential Phase
High Input Impedance: 14MΩ, 3pF
Wide Supply Range:
±2V
to
±15V
Shutdown Mode: I
S
< 250µA
Low Supply Current: I
S
= 10mA
Inputs Common Mode to Within 1.5V of Supplies
Outputs Swing Within 0.8V of Supplies
The LT1227 is a current feedback amplifier with wide
bandwidth and excellent video characteristics. The low
differential gain and phase, wide bandwidth, and 30mA
output drive current make the LT1227 well suited to drive
cables in video systems.
A shutdown feature switches the device into a high imped-
ance, low current mode, allowing multiple devices to be
connected in parallel and selected. Input to output isola-
tion in shutdown is 70dB at 10MHz for input amplitudes up
to 10V
P-P
. The shutdown pin interfaces to open collector
or open drain logic and takes only 4µs to enable or disable.
The LT1227 comes in the industry standard pinout and
can upgrade the performance of many older products. For
a dual or quad version, see the LT1229/1230 data sheet.
The LT1227 is manufactured on Linear Technology’s
proprietary complementary bipolar process.
APPLICATI
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Video Amplifiers
Cable Drivers
RGB Amplifiers
Test Equipment Amplifiers
50Ω Buffers for Driving Mixers
TYPICAL APPLICATI
Video Cable Driver
0.20
Differential Gain and Phase
vs Supply Voltage
0.20
NTSC COMPOSITE
f = 3.58MHz
V
IN
+
LT1227
75Ω
DIFFERENTIAL PHASE (DEG)
0.16
R
F
1k
75Ω
CABLE
V
OUT
0.12
0.08
∆φ
0.04
∆G
0
5
7
11
13
9
SUPPLY VOLTAGE (±V)
15
R
G
1k
V
OUT
=1
V
IN
75Ω
1227 TA01
U
0.16
UO
UO
DIFFERENTIAL GAIN (%)
0.12
0.08
0.04
0
LT1227 • TA02
1