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LT1794IFE Datasheet

  • LT1794IFE

  • Dual 500mA, 200MHz xDSL Line Driver Amplifier

  • 20頁

  • LINER

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LT1794
Dual 500mA, 200MHz
xDSL Line Driver Amplifier
FEATURES
s
s
s
s
s
s
s
DESCRIPTIO
s
s
s
Exceeds All Requirements For Full Rate,
Downstream ADSL Line Drivers
鹵500mA
Minimum I
OUT
鹵11.1V
Output Swing, V
S
=
鹵12V,
R
L
= 100鈩?/div>
鹵10.9V
Output Swing, V
S
=
鹵12V,
I
L
= 250mA
Low Distortion: 鈥?82dBc at 1MHz, 2V
P-P
Into 50鈩?/div>
Power Saving Adjustable Supply Current
Power Enhanced Small Footprint Packages:
20-Lead TSSOP and 20-Lead SW
200MHz Gain Bandwidth
500V/碌s Slew Rate
Specified at
鹵15V, 鹵12V
and
鹵5V
The LT
廬
1794 is a 500mA minimum output current, dual op
amp with outstanding distortion performance. The ampli-
fiers are gain-of-ten stable, but can be easily compensated
for lower gains. The extended output swing allows for
lower supply rails to reduce system power. Supply current
is set with an external resistor to optimize power dissipa-
tion. The LT1794 features balanced, high impedance in-
puts with low input bias current and input offset voltage.
Active termination is easily implemented for further sys-
tem power reduction. Short-circuit protection and thermal
shutdown insure the device鈥檚 ruggedness.
The outputs drive a 100鈩?load to
鹵11.1V
with
鹵12V
supplies, and
鹵10.9V
with a 250mA load. The LT1794,
with its increased swing on lower supplies, can be used to
upgrade LT1795 line driver applications.
The LT1794 is available in the very small, thermally
enhanced, 20-lead TSSOP for maximum port density in
line driver applications. The 20-lead SW is also available.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
High Density ADSL Central Office Line Drivers
High Efficiency ADSL, HDSL2, G.lite,
SHDSL Line Drivers
Buffers
Test Equipment Amplifiers
Cable Drivers
TYPICAL APPLICATIO
High Efficiency
鹵12V
Supply ADSL Central Office Line Driver
12V
R
BIAS
24.9k
SHDN
12.7鈩?/div>
+IN
+
1/2
LT1794
鈥?/div>
1k
110鈩?/div>
1000pF
1:2*
鈥?/div>
鈥?/div>
110鈩?/div>
1k
*COILCRAFT X8390-A OR EQUIVALENT
I
SUPPLY
= 10mA PER AMPLIFIER
WITH R
BIAS
= 24.9k
1794 TA01
鈥?/div>
1/2
LT1794
鈥揑N
12.7鈩?/div>
SHDNREF
+
鈥?2V
U
100鈩?/div>
U
U
1

LT1794IFE 產品屬性

  • LT1794

  • 74

  • 集成電路 (IC)

  • 接口 - 驅動器，接收器，收發(fā)器

  • -

  • 線路驅動器，發(fā)射器

  • 2/0

  • xDSL

  • 18V

  • 表面貼裝

  • 20-TSSOP（0.173"，4.40mm 寬）裸露焊盤

  • 20-TSSOP-EP

  • 管件

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