LT1259 Linear Technology Corporation, LT1259 Datasheet

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LT1259

Manufacturer Part Number
LT1259
Description
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
90MHz Bandwidth on 5V
0.1dB Gain Flatness > 30MHz
Completely Off in Shutdown, 0 A Supply Current
High Slew Rate: 1600V/ s
Wide Supply Range: 2V(4V) to 15V(30V)
60mA Output Current
Low Supply Current: 5mA/Amplifier
Differential Gain: 0.016%
Differential Phase: 0.075
Fast Turn-On Time: 100ns
Fast Turn-Off Time: 40ns
14-Pin and 16-Pin Narrow SO Packages
RGB Cable Drivers
Spread Spectrum Amplifiers
MUX Amplifiers
Composite Video Cable Drivers
Portable Equipment
V
V
IN A
IN B
1.6k
1.6k
R
R
G
G
2-Input Video MUX Cable Driver
+
+
1/2 LT1259
1/2 LT1259
U
A
EN A
EN B
CHANNEL
1.6k
1.6k
SELECT
R
R
F
F
B
LT1259/60 • TA01
U
75
75
75
75
CABLE
V
OUT
DESCRIPTIO
The LT
feedback amplifiers, each with a shutdown pin. These
amplifiers are designed for excellent linearity while driving
cables and other low impedance loads. The LT1260 is a
triple version especially suited to RGB video applications.
These amplifiers operate on all supplies from single 5V to
When shut down, the LT1259/LT1260 amplifiers draw
zero supply current and their outputs become high
impedance. Only two LT1260s are required to make a
complete 2-input RGB MUX and cable driver. These
amplifiers turn on in only 100ns and turn off in 40ns,
making them ideal in spread spectrum and portable
equipment applications.
The LT1259/LT1260 amplifiers are manufactured on
Linear Technology’s proprietary complementary bipolar
process.
15V and draw only 5mA per amplifier when active.
130MHz Current Feedback
, LTC and LT are registered trademarks of Linear Technology Corporation.
Amplifiers with Shutdown
Low Cost Dual and Triple
®
R
f = 30MHz
1259 contains two independent 130MHz current
L
= 150
Square Wave Response
U
LT1259/LT1260
LT1259/50 • TA02
1

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LT1259 Summary of contents

Page 1

... RGB video applications. These amplifiers operate on all supplies from single 5V to 15V and draw only 5mA per amplifier when active. When shut down, the LT1259/LT1260 amplifiers draw zero supply current and their outputs become high impedance. Only two LT1260s are required to make a complete 2-input RGB MUX and cable driver ...

Page 2

... Lead Temperature (Soldering, 10 sec).................. 300 ORDER PART TOP VIEW NUMBER – + LT1259CN GND 3 LT1259CS 4 –IN G LT1259IN 5 +IN G LT1259IS 6 GND 7 + – PACKAGE 16-LEAD PLASTIC DIP T = 150 C, JMAX T = 150 C, JMAX 15V, EN pins = 0V, pulse tested, unless otherwise noted. S CONDITIONS T ...

Page 3

... 12V 1.5k 150 15V, EN pins = 0V, pulse tested, unless otherwise noted. S CONDITIONS 15V, EN Pin Voltage = 14.5V 150 15V, EN Pin Voltage = 0V S LT1259/LT1260 MIN TYP MAX UNITS 12.0 14.0 V 3.0 3 3.5 10 A/V 10 A/V 4.5 15 ...

Page 4

... FREQUENCY (MHz) 4 Note 5: The supply current of the LT1259/LT1260 has a negative temperature coefficient. See Typical Performance Characteristics. Note 6: Slew rate is measured 10V output signal while operating on 15V supplies with R Note 7: Turn-on delay time is measured while operating on 5V supplies with R from control input to appearance of 0 ...

Page 5

... Maximum Undistorted Output vs Frequency 100 1 10 FREQUENCY (MHz) LT12359/60 • TPC07 Output Impedance vs Frequency 100 V = ±15V 0.1 100k 10k 100k 1M 10M FREQUENCY (Hz) LT1259/60 • TPC10 = ±15V 100 100M 5 ...

Page 6

... Supply Current vs Supply Voltage 7 –55° 25°C 4 125° SUPPLY VOLTAGE (±V) LT1259/60 • TPC13 Output Short-Circuit Current vs Junction Temperature 125 50 75 – 50 – 100 TEMPERATURE (°C) LT1259/60 • TPC15 = R = 1.6k LT1259/60 G19 ...

Page 7

... U U APPLICATIO S I FOR ATIO Feedback Resistor Selection The small-signal bandwidth of the LT1259/ LT1260 are set by the external feedback resistors and the internal junction capacitors result, the bandwidth is a function of the supply voltage, the value of the feedback resistor, the closed-loop gain and the load resistor. The LT1259/LT1260 have been optimized for 5V supply operation and have a – ...

Page 8

... LT1259/LT1260 U U APPLICATIO S I FOR ATIO The input slew rate of the LT1259/LT1260 is approxi- mately 270V/ s and is set by internal currents and capaci- tances. The output slew rate is set by the value of the feedback resistors and internal capacitances gain of 10 with at 1k feedback resistor and 15V supplies, the output slew rate is typically 1600V/ s ...

Page 9

... The feedback node has minimum trace length connect- ing Ground plane is pulled away from R sides of the board to minimize stray capacitance. LT1259/LT1260 • TA03 LT1259/LT1260 Amplifier Enable/Disable Time LT1259/LT1260 • AI06 1. 100 = 2VPP at 2MHz ...

Page 10

... FREQUENCY (MHz) LT1259/60 • TA06 P-DIP PC Board #039 V+ V– GND EN2 EN1 R13 R14 R4 C3 R15 R16 C7 R9 R10 R17 C8 R18 R11 R12 (408) 432-1900 LT1260 RGB AMPLIFIER DEMONSTRATION BOARD LT1259/60 • TA07 ...

Page 11

... TYP S Package 16-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.004 – 0.010 (0.101 – 0.254) 0.228 – 0.244 (5.791 – 6.197) 0.050 (1.270) TYP LT1259/LT1260 0.770* (19.558) MAX 0.255 0.015 ...

Page 12

... Cascadable Enable 64:1 Multiplexing 1100V/ s Slew Rate, Shutdown Mode Single, Dual and Quad Current Feedback Amplifiers R13 75 V RED OUT 75 V GREEN OUT 75 V BLUE OUT + R16 75 R17 75 R18 75 LT1259/60 • TA08 125960fas, sn125960 LT/TP 1197 REV A 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1993 ...

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