LT6555
650MHz Gain of 2 Triple
2:1Video Multiplexer
DESCRIPTIO
FEATURES
650MHz 3dB Small Signal Bandwidth The LT 6555 is a high speed triple 2:1 video multiplexer
450MHz 3dB 2V Large-Signal Bandwidth with an internally fixed gain of 2. The individual amplifiers
P-P
120MHz 0.1dB Bandwidth are optimized for performance with a double terminated
High Slew Rate: 2200V/s 75 video load and feature a 3dB 2V bandwidth of
P-P
Fixed Gain of 2; No External Resistors Required 450MHz, making them ideal for driving very high resolu-
72dB Channel Separation at 10MHz tion video signals. Separate power supply pins for each
50dB Channel Separation at 100MHz amplifier boost channel separation to 72dB, allowing the
80dBc 2nd Harmonic Distortion at 10MHz, 2V LT6555 to excel in many high speed applications.
P-P
70dBc 3rd Harmonic Distortion at 10MHz, 2V
P-P
While the performance of the LT6555 is optimized for dual
Low Supply Current: 9mA per Amplifier
supply operation, it can also be operated with a single
6.5ns 0.1% Settling Time for 2V Step
supply as low as 4.5V. Using dual 5V supplies, each
I 500A per Amplifier when Disabled
SS
amplifier draws only 9mA. When disabled, the amplifiers
Differential Gain of 0.033%, Differential
draw less than 500A and the outputs become high
Phase of 0.022
impedance.
Wide Supply Range: 2.25V (4.5V) to 6V (12V)
The LT6555 is manufactured on Linear Technologys
Available in 24-Lead SSOP and 24-Lead QFN
proprietary low voltage complementary bipolar process
Packages
U and is available in 24-lead SSOP and ultra-compact
APPLICATIO S
24-lead QFN packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
RGB Amplifiers All other trademarks are the property of their respective owners.
UXGA Video Multiplexing
LCD Projectors
TYPICAL APPLICATIO
RGB Multiplexer and Line Driver
+
V
R
LT6555
INA
G
INA
75
B
INA 75 Video Amplitude Transient Response
2
R
OUT
1.8
75
75
1.6
1.4
1.2
AGND
75
75 1.0
2 G
OUT
0.8
75
R 0.6
INB
G
INB
0.4
B
INB
75
0.2
V = 0V TO 700mV
IN
0
V = 5V
S
75
R = 150
L
0.2
2
B
75 OUT
T = 25C
A
75
0.4
0214 6 12 14 168 20
8 10
SELECT A/B
TIME (ns)
75 ENABLE
6555 G21
DGND
6555 TA01a
V
6555f
1
OUTPUT (V)
U
ULT6555
ABSOLUTE AXI U RATI GS (Note 1)
+
Total Supply Voltage (V to V ) ............................ 12.6V Junction Temperature
Input Current (Note 2) ........................................ 10mA SSOP ................................................................ 150C
Output Current (Continuous) ............................. 70mA QFN .................................................................. 125C
EN to DGND Voltage (Note 2) ................................. 5.5V Storage Temperature Range
SEL to DGND Voltage (Note 2) .................................. 8V SSOP ................................................. 65C to 150C
Output Short-Circuit Duration (Note 3) ............ Indefinite QFN ................................................... 65C to 125C
Operating Temperature Range (Note 4) ... 40C to 85C Lead Temperature (Soldering, 10 sec)
Specified Temperature Range (Note 5) .... 40C to 85C SSOP ................................................................ 300C
UUW
PACKAGE/ORDER I FOR ATIO
TOP VIEW ORDER PART TOP VIEW ORDER PART
+
NUMBER NUMBER
1 V
IN1A 24
2 EN
DGND 23
24 23 22 21 20 19
LT6555CGN LT6555CUF
3 SEL A/B
IN2A 22
+
V 1 18 V
REF
LT6555IGN LT6555IUF
+
4 V
V 21
REF
IN3A 2 17 OUT1
G = +2
5 OUT1
IN3A 20
AGND1 V
3 16
25
6 V
AGND1 19
V 4 15 OUT2
G = +2 +
7 OUT2
IN1B 18
IN1B 5 14 V
+
8 V
AGND2 17 AGND2 6 13 OUT3
UF PART*
9 G = +2 OUT3
IN2B 16
7 8 9 10 11 12
MARKING
10 V
AGND3 15
+
11 V 6555
IN3B 14
+
12 V
V 13 UF PACKAGE
24-LEAD (4mm 4mm) PLASTIC QFN
GN PACKAGE
T = 125C, = 37C/W, = 2.6C/W
JMAX JA JC
24-LEAD PLASTIC SSOP
EXPOSED PAD (PIN 25) IS V
MUST BE SOLDERED TO PCB
T = 150C, = 90C/W
JMAX JA
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T = 25C. V = 5V, R = 150, C = 1.5pF, V = 0.4V, V , V , V = 0V.
A S L L EN AGND DGND VREF
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V Input Referred Offset Voltage V = 0V, V = V /2 5 16 mV
OS IN OS OUT
24 mV
I Input Current 17 45 A
IN
R Input Resistance V = 1V 100 400 k
IN IN
C Input Capacitance f = 100kHz 1 pF
IN
PSRR Power Supply Rejection Ratio V = 2.25V to 6V (Note 6) 56 62 dB
S
I Input Current Power Supply Rejection V = 2.25V to 6V (Note 6) 1 4 A/V
PSRR S
A ERR Gain Error V = 2V, Nominal Gain 2V/V 2.5 %
V OUT
A MATCH Gain Matching Any One Channel to Another 0.33 %
V
V Output Voltage Swing (Note 7) 3.15 3.4 V
OUT
3.0 V
6555f
2
IN2B IN2A
AGND3 DGND
IN3B IN1A
+ +
V V
+
V EN
V SEL A/B
U WWW