LT1795CFE Linear Technology, LT1795CFE Datasheet

IC AMP CURR FEEDBCK DUAL 20TSSOP

LT1795CFE

Manufacturer Part Number
LT1795CFE
Description
IC AMP CURR FEEDBCK DUAL 20TSSOP
Manufacturer
Linear Technology
Datasheet

Specifications of LT1795CFE

Amplifier Type
Current Feedback
Number Of Circuits
2
Slew Rate
900 V/µs
-3db Bandwidth
65MHz
Current - Input Bias
10µA
Voltage - Input Offset
3000µV
Current - Supply
29mA
Current - Output / Channel
1A
Voltage - Supply, Single/dual (±)
±5 V ~ 15 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Output Type
-
Gain Bandwidth Product
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1795CFE
Manufacturer:
LT/凌特
Quantity:
20 000
Company:
Part Number:
LT1795CFE
Quantity:
746
Part Number:
LT1795CFE#PBF
Manufacturer:
LT
Quantity:
1 481
Part Number:
LT1795CFE#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1795CFE#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIO S
TYPICAL
500mA Output Drive Current
50MHz Bandwidth, A
900V/ s Slew Rate, A
Low Distortion: –75dBc at 1MHz
High Input Impedance, 10M
Wide Supply Range, 5V to 15V
Full Rate, Downstream ADSL Supported
Low Power Shutdown Mode
Power Saving Adjustable Supply Current
Stable with C
Power Enhanced Small Footprint Packages
TSSOP-20, S0-20 Wide
Available in a 20-Lead TSSOP Package
ADSL HDSL2, G.lite Drivers
Buffers
Test Equipment Amplifiers
Video Amplifiers
Cable Drivers
APPLICATION
L
= 10,000pF
U
V
V
= 2, R
= 2, R
165
+IN
–IN
L
* MIDCOM 50215 OR EQUIVALENT
L
U
= 25
= 25
Low Loss, High Power Central Office ADSL Line Driver
+
+
LT1795
LT1795
1/2
1/2
1k
1k
V
V
+
12.5
12.5
Current Feedback Line Driver
1:2*
DESCRIPTIO
The LT
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.
®
1795 is a dual current feedback amplifier with high
Dual 500mA/50MHz
U
1795 TA01
100
Amplifier
LT1795
1795fa
1

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LT1795CFE Summary of contents

Page 1

... 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. Low Loss, High Power Central Office ADSL Line Driver + ...

Page 2

... Input Noise Current Density n – i Input Noise Current Density (Note 1) Specified Temperature Range (Note 3) ... – Junction Temperature ........................................... 150 C Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 ORDER PART NUMBER COMP LT1795CFE OUT 3 LT1795IFE – – – – –IN +IN 9 SHDN ...

Page 3

ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full specified temperature range, otherwise specifications are 0V 15V, pulse tested SYMBOL PARAMETER + R Input Resistance Input ...

Page 4

LT1795 SMALL-SIGNAL BANDWIDTH 30mA per Amplifer 15V Peaking 1dB –1 976 976 1 1.15k — 2 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Second Harmonic Distortion vs Frequency – DIFFERENTIAL 20V OUT P-P – 15V LOAD I PER AMPLIFIER – 20mA ...

Page 6

LT1795 W U TYPICAL PERFOR A CE CHARACTERISTICS Third Harmonic Distortion vs Frequency – DIFFERENTIAL OUT P-P – 5mA 12V LOAD –60 I PER ...

Page 7

U U APPLICATIO S I FOR ATIO The LT1795 is a dual current feedback amplifier with high output current drive capability. The amplifier is designed to drive low impedance loads such as twisted-pair trans- mission lines with excellent linearity. SHUTDOWN/CURRENT ...

Page 8

LT1795 U U APPLICATIO S I FOR ATIO quiescent current to 33mA with V control is desired in addition to reduced quiescent current, then the circuits in Figures can be employed SHDN R 10 ...

Page 9

U U APPLICATIO S I FOR ATIO ture until the device begins thermal shutdown gives a good indication of how much margin there is in the thermal design. For surface mount devices, heat sinking is accomplished by using the heat ...

Page 10

LT1795 U U APPLICATIONS INFORMATION Figure 9 shows the effect of the network on a 200pF load. Without the optional compensation, there is a 6dB peak at 85MHz caused by the effect of the capacitance on the output stage. Adding ...

Page 11

... DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 20-Lead Plastic TSSOP (4 ...

Page 12

... SHDNREF SOURCES Q5 Q10 Q15 Q9 – V – –IN COMP Q12 Q3 Q8 Q16 D2 Q4 Q13 Q7 www.linear.com + V Q11 OUTPUT Q14 – V 1795 SS COMMENTS 900V/ s Slew Rate Shutdown/Current Set Function Low Distortion: –72dBc at 200kHz LT/TP 0603 1K REVA • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1999 1795fa ...

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