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參數資料
| 型號： | LT1227M |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 140MHz Video Current Feedback Amplifier |
| 中文描述： | 140MHz的視頻電流反饋放大器 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 326K |
| 代理商： | LT1227M |
1
LT1227
140MHz Video Current
Feedback Amplifier
U
A
O
PPLICATI
TYPICAL
S
FEATURE
I
140MHz Bandwidth: A
V
= 2, R
L
= 150
I
1100V/
μ
s Slew Rate
I
Low Cost
I
30mA Output Drive Current
I
0.01% Differential Gain
I
0.01
°
Differential Phase
I
High Input Impedance: 14M
, 3pF
I
Wide Supply Range:
±
2V to
±
15V
I
Shutdown Mode: I
S
< 250
μ
A
I
Low Supply Current: I
S
= 10mA
I
Inputs Common Mode to Within 1.5V of Supplies
I
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 4
μ
s 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.
D
U
ESCRIPTIO
Video Cable Driver
Differential Gain and Phase
vs Supply Voltage
–
+
75
CABLE
V
OUT
75
R
G
1k
LT1227
75
V
IN
V
OUT
V
IN
= 1
1227 TA01
R
F
1k
I
Video Amplifiers
I
Cable Drivers
I
RGB Amplifiers
I
Test Equipment Amplifiers
I
50
Buffers for Driving Mixers
U
S
A
O
PPLICATI
SUPPLY VOLTAGE (±V)
5
D
0.12
0.16
0.20
13
LT1227 TA02
0.08
0.04
0
7
9
11
15
0.12
0.16
0.20
0.08
0.04
0
D
NTSC COMPOSITE
f = 3.58MHz
φ
G
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