參數(shù)資料
型號： LT1739IFE#TR
廠商： Linear Technology
文件頁數(shù)： 1/20頁
文件大小： 0K
描述： IC AMP XDSL LINE DRV DUAL20TSSOP
標(biāo)準(zhǔn)包裝： 2,500
類型： 線路驅(qū)動(dòng)器，發(fā)射器
驅(qū)動(dòng)器/接收器數(shù)： 2/0
電源電壓： 5 V ~ 12 V
安裝類型： 表面貼裝
封裝/外殼： 20-TSSOP（0.173"，4.40mm 寬）裸露焊盤
供應(yīng)商設(shè)備封裝： 20-TSSOP-EP
包裝： 帶卷 (TR)
其它名稱： LT1739IFETR
1
LT1739
1739fas, sn1739
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
TYPICAL APPLICATIO
U
Dual 500mA, 200MHz
xDSL Line Driver Amplifier
s
3mm
× 4mm High Power DFN Package
s
Exceeds All Requirements For Full Rate,
Downstream ADSL Line Drivers
s
±500mA Minimum IOUT
s
±11.1V Output Swing, VS = ±12V, RL = 100
s
±10.9V Output Swing, VS = ±12V, IL = 250mA
s
Low Distortion: – 82dBc at 1MHz, 2VP-P Into 50
s
Power Saving Adjustable Supply Current
s
Power Enhanced TSSOP-20 Small Footprint Package
s
200MHz Gain Bandwidth
s
600V/
s Slew Rate
s
Specified at
±12V and ±5V
s
High Density ADSL Central Office Line Drivers
s
High Efficiency ADSL, HDSL2, G.lite,
SHDSL Line Drivers
s
Buffers
s
Test Equipment Amplifiers
s
Cable Drivers
The LT
1739 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 LT1739 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’s ruggedness.
The outputs drive a 100
load to ±11.1V with ±12V
supplies, and
±10.9V with a 250mA load. The LT1739 is a
pin-for-pin replacement for the LT1794 in xDSL line driver
applications and requires no circuit changes.
The LT1739 is available in the very small, thermally
enhanced, 3mm
× 4mm DFN package or a 20-lead TSSOP
for maximum port density in central office line driver
applications. For a dual version of the LT1739, see the
LT6301 data sheet.
High Efficiency
±12V Supply ADSL Central Office Line Driver
1739 TA01
+
–
1/2
LT1739
–IN
–
+
1/2
LT1739
+IN
12V
SHDN
–12V
12.7
RBIAS
24.9k
1:2*
110
1000pF
110
1k
12.7
SHDNREF
100
*COILCRAFT X8390-A OR EQUIVALENT
ISUPPLY = 10mA PER AMPLIFIER
WITH RBIAS = 24.9k
, LTC and LT are registered trademarks of Linear Technology Corporation.
4mm
3mm
0.8mm
1739
TA02
EXPOSED
THERMAL
PAD
3mm
× 4mm DFN Package
Bottom View
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