LT6554
650MHz Gain of 1
Triple Video Buffer
FEATURES DESCRIPTIO
650MHz 3dB Small Signal Bandwidth The LT 6554 is a high-speed triple video buffer with an
400MHz 3dB 2V Large Signal Bandwidth internally fixed gain of 1. The individual buffers are opti-
P-P
100MHz 0.1dB Bandwidth mized for performance with a 1k load and feature a
High Slew Rate: 2500V/s 2V full signal bandwidth of 400MHz, making them ideal
PP
Fixed Gain of 1 Requires No External Resistors for driving very high-resolution video signals. Separate
90dB Channel Separation at 10MHz power supply pins for each amplifier boost channel sepa-
60dB Channel Separation at 100MHz ration to 90dB, allowing the LT6554 to excel in many high-
82dBc 2nd Harmonic Distortion at 10MHz, 2V speed applications.
P-P
96dBc 3rd Harmonic Distortion at 10MHz, 2V
P-P
While the performance of the LT6554 is optimized for dual
Low Supply Current: 8mA per Amplifier
supply operation, it can also be used on a single supply as
6ns 0.1% Settling Time for 2V Step
low as 4.5V. Using dual 5V supplies, each amplifier draws
TTL Compatible Enable: I 100A When Disabled
SS
only 8mA. When disabled, the amplifiers draw less than
Differential Gain of 0.022%, Differential
100A and the outputs become high impedance. Further-
Phase of 0.006
more, the amplifiers are capable of turning on in less than
Wide Supply Range: 2.25V (4.5V) to 6V (12V)
50ns, making them suitable for multiplexing and portable
Available in 16-Lead SSOP Package
applications.
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APPLICATIO S
The LT6554 is manufactured on Linear Technologys
proprietary low voltage complementary bipolar process
RGB Buffers
and is available in the 16-lead SSOP package that fits in the
A/D Drivers
same PCB area as an SO-8 package.
LCD Projectors
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
Triple Video Buffer and A/D Driver
5V
1 16
Large Signal Transient Response
LT6554
2 15
1.5
V = 2V
OUT PP
3 V = 5V
S
+
R
IN 14
R = 1k
1.0 L
T = 25C
A
1k
480
0.5
4 13
5V
480
0
12
5
+
G
IN 0.5
1k
480
6 11
5V
1.0
10
7
1.5
+
B
IN
0 2 4 6 8 10 12 14 16 18 20
1k
TIME (ns)
8 9
5V 5V
6554 TA01b
6554 TA01a
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OUTPUT (V)
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ULT6554
UUW
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
ORDER PART
+
TOP VIEW
Total Supply Voltage (V to V ) ............................ 13.2V
NUMBER
+
EN 1 16 V
Input Current (Note 2) ........................................ 10mA
+
DGND 2 15 V
Output Current (Continuous) ............................. 70mA
LT6554CGN
INR 3 G = +1 14 OUTR
EN to DGND Voltage (Note 2) ................................. 5.5V
LT6554IGN
AGND 4 13 V
Output Short-Circuit Duration (Note 3) ............ Indefinite
G = +1
ING 5 12 OUTG
Operating Temperature Range (Note 4) ... 40C to 85C
+
AGND 6 11 V GN PART
Specified Temperature Range (Note 5) .... 40C to 85C
G = +1
INB 7 10 OUTB
MARKING
Storage Temperature Range .................. 65C to 150C
V 8 9 V
Junction Temperature........................................... 150C
6554
GN PACKAGE
Lead Temperature (Soldering, 10 sec).................. 300C
6554I
16-LEAD PLASTIC SSOP
T = 150C, = 135C/W
JMAX JA
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T = 25C. V = 5V, R = 1k, C = 1.5pF, V = 0.4V, V , V = 0V.
A S L L EN AGND DGND
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V Offset Voltage V = 0V, V = V 11 35 mV
OS IN OS OUT
70 mV
I Input Current 17 50 A
IN
e Output Noise Voltage f = 100kHz 20 nVHz
n
i Input Noise Current f = 100kHz 3.5 pAHz
n
R Input Resistance V = 1V 150 400 k
IN IN
C Input Capacitance f = 100kHz 1 pF
IN
PSRR Power Supply Rejection Ratio V (Total) = 4.5V to 12V (Note 6) 51 65 dB
S
I Input Current Power Supply V (Total) = 4.5V to 12V (Note 6) 1 5 A/V
PSRR S
Rejection
A ERR Gain Error V = 2V 2.5 0.6 0 %
V OUT
A MATCH Gain Matching Any One Channel to Another 0.03 %
V
V Maximum Output Voltage Swing 3.75 3.85 V
OUT
I Supply Current, Per Amplifier R = 810 mA
S L
R = 13 mA
L
Supply Current, Disabled, Total V = 4V 22 100 A
EN
V = Open 0.5 100 A
EN
I Enable Pin Current V = 0.4V 200 95 A
EN EN
+
V = V 0.5 50 A
EN
I Output Short-Circuit Current R = 0 , V = 2V 50 105 mA
SC L IN
SR Slew Rate 4V Output Step (Note 9) 1700 2500 V/s
P-P
3dB BW Small Signal 3dB Bandwidth V = 200mV 650 MHz
OUT P-P
0.1dB BW Gain Flatness 0.1dB Bandwidth V = 200mV 100 MHz
OUT P-P
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