LT6550/LT6551
3.3V Triple and Quad
Video Amplifiers
FEATURES
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DESCRIPTIO
Single Supply Operation from 3V to 12.6V
Small (3mm
×
5mm) MSOP 10-Lead Package
Internal Resistors for a Gain of Two
340V/µs Slew Rate
110MHz –3dB Bandwidth
30MHz Flat to 0.25dB
3% Settling Time: 20ns
Input Common Mode Range Includes Ground
Rail-to-Rail Output
High Output Drive: 60mA
Operating Temperature Range: – 40°C to 85°C
24-Bit RGB
The LT
®
6550/LT6551 are 3.3V triple and quad high speed
video amplifiers. These voltage feedback amplifiers drive
double terminated 50Ω or 75Ω cables and are configured
for a fixed gain of 2, eliminating six or eight external gain
setting resistors. The LT6550/LT6551 feature 110MHz
–3dB bandwidth, high slew rates and fast settling, making
them ideal for RGB video processing.
The LT6551 quad is designed for single supply operation
and the LT6550 triple can be used on either single or split
supplies. On a single 3.3V supply, the input voltage range
extends from ground to 1.55V and the output swings to
within 400mV of the supply voltage while driving a 150Ω
load. These features, combined with the ability to accept
RGB video signals without the need for AC coupling or
level shifting of the incoming signals, make the LT6550/
LT6551 an ideal choice for low voltage video applications.
Both the LT6550 and LT6551 are available in the small
10-Pin MSOP package and utilize a flow-thru pin out. The
small footprint results in a compact high performance
video amplifier solution.
APPLICATIO S
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Automotive Displays
LCD and CRT Compatible
RGB Amplifiers
Coaxial Cable Drivers
Low Voltage High Speed Signal Processing
Set Top Boxes
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
LT6551
450Ω
R
IN
75Ω
–
OA
+
450Ω
G
IN
75Ω
–
OA
+
450Ω
B
IN
75Ω
–
OA
+
450Ω
SYNC
IN
75Ω
–
OA
+
450Ω
450Ω
450Ω
450Ω
3.3V Single Supply LT6551 RGB Plus SYNC Cable Driver
Output Step Response
3.3V
R
OUT
75Ω
75Ω
G
OUT
75Ω
75Ω
B
OUT
75Ω
75Ω
V
IN
0V
V
S
= 3.3V
V
IN
= 0.5V TO 1.25V
f = 10MHz
6550/51 TA01b
75Ω
SYNC
OUT
75Ω
6551 TA01a
GND
U
V
OUT
0V
65501fa
U
U
1
LT6550/LT6551
ABSOLUTE
(Note 1)
AXI U RATI GS
Specified Temperature Range (Note 3)
LT6550C/LT6551C ..............................–40°C to 85°C
LT6550I/LT6551I ................................ – 40°C to 85°C
Maximum Junction Temperature .......................... 150°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Total Supply Voltage
LT6550 (V
CC
TO V
EE
) ........................................ 12.6V
LT6551 (V
CC
TO GND) ...................................... 12.6V
Input Current (Note 9) ........................................
±10mA
Output Short-Circuit Duration (Note 2) ............ Indefinite
Operating Temperature Range ................ – 40°C to 85°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
IN1
IN2
IN3
GND
V
EE
1
2
3
4
5
X2
X2
X2
10
9
8
7
6
V
CC
OUT1
OUT2
OUT3
N/C
MS10 PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 110°C/W
(Note 4)
ORDER PART NUMBER
LT6550CMS
LT6550IMS
MS10 PART MARKING
LTB9
LTC1
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
3.3V ELECTRICAL CHARACTERISTICS
PARAMETER
DC Output Accuracy
Output Voltage Matching
Input Current
Input Impedance,
∆V
IN
/∆I
IN
Input Noise Voltage Density
Input Noise Current Density
Voltage Gain (Note 5)
CONDITIONS
The
●
denotes the specifications which apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, V
GND
= 0V; V
IN
= 0.75V LT6550 (Pins 1,2,3);
LT6551 (Pins 1,2,3,4). V
EE
= 0V LT6550 (Pin 5), unless otherwise noted.
MIN
●
●
●
●
No Load, V
OUT
Ideal = 1.5V
Between Any Two Outputs
Any Input
V
IN
= 0V to 1V
f = 100kHz (Note 10)
f = 100kHz (Note 10)
0.25V
≤
V
IN
≤
1.25V
No Load
R
L
= 150Ω
R
L
= 75Ω, 0.25V
≤
V
IN
≤
0.75V
V
IN
= – 0.1V
No Load
I
SINK
= 5mA
I
SINK
= 10mA
Output Voltage Swing Low
2
U
U
W
W W
U
W
TOP VIEW
IN1
IN2
IN3
IN4
GND
1
2
3
4
5
X2
X2
X2
X2
10
9
8
7
6
V
CC
OUT1
OUT2
OUT3
OUT4
MS10 PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 110°C/W
(Note 4)
ORDER PART NUMBER
LT6551CMS
LT6551IMS
MS10 PART MARKING
LTC2
LTC3
TYP
30
25
15
MAX
70
75
65
UNITS
mV
mV
µA
kΩ
nV/√Hz
pA/√Hz
100
300
12
8
●
●
1.9
1.9
1.85
10
60
90
2.1
2.1
2.15
30
150
200
V/V
V/V
V/V
mV
mV
mV
65501fa
●
●
●
LT6550/LT6551
3.3V ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage Swing High
CONDITIONS
V
IN
= 1.75V
No Load
R
L
= 150Ω
R
L
= 75Ω
V
CC
= 3V to 10V, V
IN
= 0.5V
V
IN
= 1V, V
OUT
= 0V
●
●
●
●
●
The
●
denotes the specifications which apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, V
GND
= 0V; V
IN
= 0.75V LT6550 (Pins 1,2,3);
LT6551 (Pins 1,2,3,4). V
EE
= 0V LT6550 (Pin 5), unless otherwise noted.
MIN
3.0
2.5
2.0
40
3
35
25
50
8.5
●
TYP
3.2
2.9
2.5
48
MAX
UNITS
V
V
V
dB
V
mA
mA
PSRR
Minimum Supply Voltage (Note 6)
Output Short-Circuit Current
Supply Current per Amplifier (Note 7)
Slew Rate (Note 8)
Small Signal –3dB Bandwidth
Gain Flatness
Gain Matching
Settling Time to 3%
Settling Time to 1%
% Overshoot
Differential Gain
Differential Phase
Channel Separation
10
11
mA
mA
V/µs
V/µs
MHz
MHz
dB
ns
ns
%
%
Deg
dB
R
L
= 150Ω, V
OUT
= 0.5V to 2.5V
Measured from 1V to 2V
R
L
= 150Ω
Less than 0.25dB
Any One Channel to Any Other Channel
R
L
= 150Ω, V
OUT
= 1V to 2.5V
R
L
= 150Ω, V
OUT
= 1V to 2.5V
V
OUT
= 1V to 2.5V, R
L
= 150Ω
R
L
= 150Ω, Black Level = 0.6V at Device Output
R
L
= 150Ω, Black Level = 0.6V at Device Output
Measured at 10MHz
●
140
115
250
90
30
0.15
20
30
5
0.09
0.09
60
5V ELECTRICAL CHARACTERISTICS
PARAMETER
Output Accuracy
Output Voltage Matching
Input Current
Input Impedance,
∆V
IN
/∆I
IN
Input Noise Voltage Density
Input Noise Current Density
Voltage Gain (Note 5)
V
IN
= 0V to 2V
CONDITIONS
The
●
denotes the specifications which apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
GND
= 0V; V
IN
= 1.25V LT6550 (Pins 1,2,3);
LT6551 (Pins 1,2,3,4). V
EE
= 0V LT6550 (Pin 5), unless otherwise noted.
MIN
●
●
●
●
TYP
30
40
15
MAX
70
90
65
UNITS
mV
mV
µA
kΩ
nV/√Hz
pA/√Hz
No Load, V
OUT
Ideal = 2.5V
Between Any Two Outputs
100
300
12
8
f = 100kHz (Note 10)
f = 100kHz (Note 10)
0.25V
≤
V
IN
≤
1.75V
No Load
R
L
= 150Ω
R
L
= 75Ω, 0.25V
≤
V
IN
≤
1.25V, 0°C
≤
T
A
≤
70°C (Only)
V
IN
= – 0.1V
No Load
I
SINK
= 5mA
I
SINK
= 10mA
V
IN
= 2.6V
No Load
R
L
= 150Ω
R
L
= 75Ω, 0°C
≤
T
A
≤
70°C (Only)
●
●
●
●
●
●
●
●
●
1.9
1.9
1.85
10
60
90
4.6
3.5
2.5
4.8
4.1
3.2
2.1
2.1
2.15
30
150
200
V/V
V/V
V/V
mV
mV
mV
V
V
V
65501fa
Output Voltage Swing Low
Output Voltage Swing High
3
LT6550/LT6551
The
●
denotes the specifications which apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
GND
= 0V; V
IN
= 1.25V LT6550 (Pins 1,2,3);
LT6551 (Pins 1,2,3,4). V
EE
= 0V LT6550 (Pin 5), unless otherwise noted.
PARAMETER
PSRR
Minimum Supply Voltage (Note 6)
Output Short-Circuit Current
V
IN
= 1V, V
OUT
= 0V
0°C
≤
T
A
≤
70°C
– 40°C
≤
T
A
≤
85°C
CONDITIONS
V
CC
= 3V to 10V, V
IN
= 0.5V
●
●
●
●
●
5V ELECTRICAL CHARACTERISTICS
MIN
40
3
45
40
30
TYP
48
60
MAX
UNITS
dB
V
mA
mA
mA
Supply Current per Amplifier (Note 7)
Slew Rate
Small Signal –3dB Bandwidth
Gain Flatness
Gain Matching
Settling Time to 3%
Settling Time to 1%
% Overshoot
Differential Gain
Differential Phase
Channel Separation
R
L
= 150Ω, V
OUT
= 0.5V to 3.5V,
Measured from 1V to 3V
R
L
= 150Ω
Less than 0.25dB
Any One Channel to Any Other Channel
R
L
= 150Ω, V
OUT
= 1V to 2.5V
R
L
= 150Ω, V
OUT
= 1V to 2.5V
V
OUT
= 1V to 2.5V, R
L
= 150Ω
R
L
= 150Ω, Black Level = 1V at Device Output
R
L
= 150Ω, Black Level = 1V at Device Output
Measured at 10MHz
220
180
9.5
340
110
30
0.15
20
35
5
0.05
0.05
60
11.5
12.5
mA
mA
V/µs
V/µs
MHz
MHz
dB
ns
ns
%
%
Deg
dB
●
±5V
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Offset
Output Voltage Matching
Input Current
Input Impedance,
∆V
IN
/∆I
IN
Input Noise Voltage Density
Input Noise Current Density
Voltage Gain
V
IN
= –1V to 1V
CONDITIONS
(LT6550 Only) The
●
denotes the specifications which apply over
the specified temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±5V,
V
IN
= 0V (Pins 1,2,3) V
GND
= 0V (Pin 4) unless
otherwise noted.
MIN
●
●
●
●
TYP
30
20
20
MAX
70
60
70
UNITS
mV
mV
µA
kΩ
nV/√Hz
pA/√Hz
Between Any Two Outputs
200
500
12
8
f = 100kHz (Note 10)
f = 100kHz (Note 10)
– 1.75V
≤
V
IN
≤
1.75V
No Load
R
L
= 150Ω
R
L
= 75Ω, – 1V
≤
V
IN
≤
1V
V
IN
=
±2.6V
No Load
R
L
= 150Ω
R
L
= 75Ω, 0°C
≤
T
A
≤
70°C (Only)
V
S
=
±2.5V
to
±5V,
V
O
= 0V
0°C
≤
T
A
≤
70°C
–40°C
≤
T
A
≤
85°C
●
●
●
●
●
●
●
●
●
1.9
1.9
1.9
±4.6
±3.5
±2.6
38
45
40
30
±4.8
±4.2
±3.2
48
60
2.1
2.1
2.1
V/V
V/V
V/V
V
V
V
dB
mA
mA
mA
Output Voltage Swing
PSRR
Output Short-Circuit Current
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4
LT6550/LT6551
±5V
ELECTRICAL CHARACTERISTICS
PARAMETER
Supply Current per Amplifier
CONDITIONS
(LT6550 Only) The
●
denotes the specifications which apply over
the specified temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±5V,
V
IN
= 0V (Pins 1,2,3) V
GND
= 0V (Pin 4) unless
otherwise noted.
MIN
●
TYP
8.5
MAX
10.5
12
UNITS
mA
mA
V/µs
V/µs
MHz
MHz
dB
ns
ns
%
%
Deg
dB
Slew Rate
Small Signal –3dB Bandwidth
Gain Flatness
Gain Matching
Settling Time to 3%
Settling Time to 1%
% Overshoot
Differential Gain
Differential Phase
Channel Separation
R
L
= 150Ω, V
OUT
= –3V to 3V,
Measured from –2V to 2V
R
L
= 150Ω
Less than 0.25dB
Any One Channel to Any Other Channel
R
L
= 150Ω, V
OUT
= 1V to 2.5V
R
L
= 150Ω, V
OUT
= 1V to 2.5V
V
OUT
= 1V to 2.5V, R
L
= 150Ω
R
L
= 150Ω, Black Level = 0V at Device Output
R
L
= 150Ω, Black Level = 0V at Device Output
Measured at 10MHz
●
400
300
600
90
30
0.15
20
30
5
0.15
0.09
60
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
A heat sink may be required to keep the junction temperature
below absolute maximum. This depends on the power supply voltage and
how many amplifiers are shorted.
Note 3:
The LT6550C/LT6551C are guaranteed to meet specified
performance from 0°C to 70°C and are designed, characterized and
expected to meet specified performance from –40°C to 85°C but are not
tested or QA sampled at these temperatures. The LT6550I/LT6551I are
guaranteed to meet specified performance from – 40°C to 85°C.
Note 4:
Thermal resistance varies depending upon the amount of PC board
metal attached to Pin 5 of the device.
θ
JA
is specified for a 2500mm
2
test
board covered with 2oz copper on both sides.
Note 5:
Gain is measured by changing the input voltage, and dividing the
change in output voltage by the change in input voltage.
Note 6:
Minimum supply voltage is guaranteed by the PSRR test.
Note 7:
The supply current specification includes additional output current
through the internal feedback and gain resistor.
Note 8:
Guaranteed by correlation to slew rate at 5V and
±5V.
Note 9:
The inputs are protected from ESD with diodes to the supplies.
Note 10:
Noise is input referred, including internal gain resistors.
5V/3.3V TYPICAL PERFOR A CE CHARACTERISTICS
V
EE
(Pin 5) = 0V (LT6550), GND (Pin 5) = 0V (LT6551)
Supply Current Per Amplifier vs
Supply Voltage
14
12
V
IN
= 0.75V
R
L
=
∞
GND = 0V
3.5
T
A
= 125°C
T
A
= 25°C
3.0
2.5
SUPPLY CURRENT (mA)
10
8
6
4
2
0
0
1
2
3
4
5 6
V
CC
(V)
7
8
9
10
INPUT BIAS (µA)
V
OUT
(V)
T
A
= –55°C
6550/51 G01
U W
2.0
1.5
1.0
0.5
0
Output Voltage vs Input Voltage
V
S
= 3.3V, 0V
R
L
= 150Ω
T
A
= 125°C
T
A
= 25°C
T
A
= –55°C
–10
Input Bias Current vs
Temperature
V
S
= 5V, 0V
–11 V
OUT
= 2.5V
–12
–13
–14
–15
–16
–17
–18
–19
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
V
IN
(V)
6550/51 G02
–20
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
6550/51 G03
65501fa
5
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