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LT1795

Description
Dual 500mA/50MHz Current Feedback Line Driver Amplifier
File Size192KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LT1795 Overview

Dual 500mA/50MHz Current Feedback Line Driver Amplifier

FEATURES
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LT1795
Dual 500mA/50MHz
Current Feedback Line Driver
Amplifier
DESCRIPTIO
The LT
®
1795 is a dual current feedback amplifier with high
output current and excellent large signal characteristics.
The combination of high slew rate, 500mA output drive
and up to
±15V
operation enables the device to deliver
significant power at frequencies in the 1MHz to 2MHz
range. Short-circuit protection and thermal shutdown
insure the device’s ruggedness. The LT1795 is stable with
large capacitive loads and can easily supply the large
currents required by the capacitive loading. A shutdown
feature switches the device into a high impedance, low
current mode, reducing power dissipation when the de-
vice is not in use. For lower bandwidth applications, the
supply current can be reduced with a single external
resistor.
The LT1795 comes in the very small, thermally enhanced,
20-lead TSSOP package for maximum port density in line
driver applications.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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500mA Output Drive Current
50MHz Bandwidth, A
V
= 2, R
L
= 25
900V/
µ
s Slew Rate, A
V
= 2, R
L
= 25
Low Distortion: –75dBc at 1MHz
High Input Impedance, 10MΩ
Wide Supply Range,
±5V
to
±15V
Full Rate, Downstream ADSL Supported
Power Enhanced Small Footprint Packages
TSSOP-20, S0-20 Wide
Low Power Shutdown Mode
Power Saving Adjustable Supply Current
Stable with C
L
= 10,000pF
APPLICATIO S
s
s
s
s
s
ADSL HDSL2, G.lite Drivers
Buffers
Test Equipment Amplifiers
Video Amplifiers
Cable Drivers
TYPICAL APPLICATION
Low Loss, High Power Central Office ADSL Line Driver
V
+
+IN
+
1/2
LT1795
12.5Ω
1k
1:2*
165Ω
1k
100Ω
1/2
LT1795
–IN
12.5Ω
+
V
1795 TA01
* MIDCOM 50215 OR EQUIVALENT
U
U
U
1

LT1795 Related Products

LT1795 LT1795ISW LT1795IFE LT1795CSW LT1795CFE
Description Dual 500mA/50MHz Current Feedback Line Driver Amplifier Dual 500mA/50MHz Current Feedback Line Driver Amplifier Dual 500mA/50MHz Current Feedback Line Driver Amplifier Dual 500mA/50MHz Current Feedback Line Driver Amplifier Dual 500mA/50MHz Current Feedback Line Driver Amplifier
Brand Name - Linear Technology Linear Technology Linear Technology Linear Technology
Is it Rohs certified? - incompatible incompatible incompatible incompatible
Parts packaging code - SOIC TSSOP SOIC TSSOP
package instruction - SOP, SOP20,.4 HTSSOP, TSSOP20,.25 SOP, SOP20,.4 HTSSOP, TSSOP20,.25
Contacts - 20 20 20 20
Manufacturer packaging code - SW FE SW FE
Reach Compliance Code - _compli _compli _compli _compli
ECCN code - EAR99 EAR99 EAR99 EAR99
Amplifier type - OPERATIONAL AMPLIFIER OPERATIONAL AMPLIFIER OPERATIONAL AMPLIFIER OPERATIONAL AMPLIFIER
Architecture - CURRENT-FEEDBACK CURRENT-FEEDBACK CURRENT-FEEDBACK CURRENT-FEEDBACK
Nominal Common Mode Rejection Ratio - 62 dB 62 dB 62 dB 62 dB
frequency compensation - YES (AVCL>=2) YES (AVCL>=2) YES (AVCL>=2) YES (AVCL>=2)
Maximum input offset voltage - 17000 µV 17000 µV 17000 µV 17000 µV
JESD-30 code - R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 R-PDSO-G20
JESD-609 code - e0 e0 e0 e0
length - 12.8015 mm 6.5 mm 12.8015 mm 6.5 mm
low-bias - NO NO NO NO
low-dissonance - NO NO NO NO
micropower - NO NO NO NO
Humidity sensitivity level - 1 1 1 1
Negative supply voltage upper limit - -18 V -18 V -18 V -18 V
Nominal Negative Supply Voltage (Vsup) - -15 V -15 V -15 V -15 V
Number of functions - 2 2 2 2
Number of terminals - 20 20 20 20
Maximum operating temperature - 85 °C 85 °C 70 °C 70 °C
Package body material - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code - SOP HTSSOP SOP HTSSOP
Encapsulate equivalent code - SOP20,.4 TSSOP20,.25 SOP20,.4 TSSOP20,.25
Package shape - RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form - SMALL OUTLINE SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) - 235 235 235 235
power - YES YES YES YES
power supply - +-5/+-15 V +-5/+-15 V +-5/+-15 V +-5/+-15 V
Programmable power - NO NO NO NO
Certification status - Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height - 2.642 mm 1.2 mm 2.642 mm 1.2 mm
Nominal slew rate - 900 V/us 900 V/us 900 V/us 900 V/us
Maximum slew rate - 84 mA 84 mA 84 mA 84 mA
Supply voltage upper limit - 18 V 18 V 18 V 18 V
Nominal supply voltage (Vsup) - 15 V 15 V 15 V 15 V
surface mount - YES YES YES YES
technology - BIPOLAR BIPOLAR BIPOLAR BIPOLAR
Temperature level - INDUSTRIAL INDUSTRIAL COMMERCIAL COMMERCIAL
Terminal surface - Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form - GULL WING GULL WING GULL WING GULL WING
Terminal pitch - 1.27 mm 0.65 mm 1.27 mm 0.65 mm
Terminal location - DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature - 20 20 20 20
Nominal Uniform Gain Bandwidth - 50000 kHz 50000 kHz 50000 kHz 50000 kHz
broadband - NO NO NO NO
width - 7.493 mm 4.4 mm 7.493 mm 4.4 mm
Base Number Matches - 1 1 1 1
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