FEATURES
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LT6559
Low Cost 5V/±5V 300MHz
Triple Video Amplifier
in 3mm
×
3mm QFN
DESCRIPTION
The LT
®
6559 is a low cost, high speed, triple amplifier that
has been optimized for excellent video performance on a
single 5V supply, yet fits in the small footprint of a 3mm
×
3mm QFN package. With a –3dB bandwidth of 300MHz, a
0.1dB bandwidth of 150MHz, and a slew rate of 800V/µs,
the LT6559’s dynamic performance is an excellent match
for high speed RGB or YP
B
P
R
video applications.
For multiplexing applications such as KVM switches or
selectable video inputs, each channel has an independent
high speed enable/disable pin. Each amplifier will turn on
in 30ns and off in 40ns. When enabled, each amplifier
draws 3.9mA from a 5V supply. The LT6559 operates on
a single supply voltage ranging from 4V to 12V, and on
split supplies ranging from ±2V to ±6V.
The LT6559 comes in a compact 16-lead 3mm
×
3mm QFN
package, and operates over a –40°C to 85°C temperature
range. The LT6559 is manufactured on Linear Technology’s
proprietary complementary bipolar process.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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300MHz Bandwidth on Single 5V and ±5V
(A
V
= 1, 2 and –1)
0.1dB Gain Flatness: 150MHz (A
V
= 1, 2 and –1)
High Slew Rate: 800V/µs
Wide Supply Range:
±2V to ±6V (Dual Supply)
4V to 12V (Single Supply)
80mA Output Current
Low Supply Current: 3.9mA/Amplifier
Shutdown Mode
Fast Turn-On Time: 30ns
Fast Turn-Off Time: 40ns
Small 0.75mm Tall 16-Lead 3mm
×
3mm QFN Package
APPLICATIONS
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RGB/YP
B
P
R
Cable Drivers
LCD Projectors
KVM Switches
A/V Receivers
MUX Amplifiers
Composite Video Cable Drivers
ADC Drivers
TYPICAL APPLICATION
3-Input Video MUX Cable Driver
5V A
V
IN A
R
G
182Ω
+
–
– 5V
V
IN B
EN A
CHANNEL SELECT
B
Square Wave Response
C
100Ω
1/3 LT6559
R
F
301Ω
5V
+
R
G
182Ω
EN B
100Ω
75Ω
CABLE
V
OUT
75Ω
OUTPUT
200mV/DIV
1/3 LT6559
–
– 5V
V
IN C
R
G
182Ω
R
F
301Ω
5V
+
–
– 5V
EN C
100Ω
TIME (10ns/DIV)
R
L
= 100Ω
R
F
= R
G
= 301Ω
f = 10MHz
6559 TA02
1/3 LT6559
6559 TA01
R
F
301Ω
6559f
1
LT6559
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PACKAGE/ORDER INFORMATION
TOP VIEW
OUT R
12 V
+
17
11 EN G
10 OUT G
9
5
+IN B
6
–IN B
7
EN B
8
OUT B
V
–
+IN R
–IN R
EN R
16 15 14 13
*GND 1
–IN G 2
+IN G 3
*GND 4
Total Supply Voltage (V
+
to V
–
) ..............................12.6V
Input Current (Note 2)......................................... ±10mA
Output Current .................................................. ±100mA
Differential Input Voltage (Note 2) ............................±5V
Output Short-Circuit Duration (Note 3) ........ Continuous
Operating Temperature Range (Note 9) –40°C to 85°C
Specified Temperature Range (Note 4) .. –40°C to 85°C
Storage Temperature Range.................. –65°C to 125°C
Junction Temperature (Note 5) ............................ 125°C
UD PACKAGE
16-LEAD (3mm
×
3mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 68°C/W,
θ
JC
= 4.2°C/W
EXPOSED PAD (PIN 17) IS V
–
, MUST BE SOLDERED TO THE PCB
ORDER PART NUMBER
LT6559CUD
UD PART MARKING
LCHG
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.
* Ground pins are not internally connected. For best channel isolation,
connect to ground.
5V ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
ΔV
OS
/ΔT
I
IN
+
I
IN
–
e
n
+i
n
–i
n
R
IN
C
IN
C
OUT
V
INH
V
INL
V
OUTH
V
OUTL
V
OUTH
PARAMETER
Input Offset Voltage
The
●
denotes specifications which apply over the specified operating
temperature range, otherwise specifications are at T
A
= 25°C. For each amplifier: V
CM
= 2.5V, V
S
= 5V,
⎯
E
⎯
N = 0V, pulse tested, unless
otherwise noted. (Note 4)
CONDITIONS
●
MIN
TYP
1.5
MAX
10
12
25
30
60
70
UNITS
mV
mV
µV/°C
µA
µA
µA
µA
⎯
nV/√H
⎯
z
⎯
pA/√H
⎯
z
⎯
pA/√H
⎯
z
MΩ
pF
pF
pF
V
Input Offset Voltage Drift
Noninverting Input Current
●
●
15
10
10
Inverting Input Current
●
Input Noise Voltage Density
Noninverting Input Noise Current
Density
Inverting Input Noise Current Density
Input Resistance
Input Capacitance
Output Capacitance
Input Voltage Range, High
Input Voltage Range, Low
Maximum Output Voltage Swing, High
Maximum Output Voltage Swing, Low
Maximum Output Voltage Swing, High
f = 1kHz, R
F
= 1k, R
G
= 10Ω, R
S
= 0Ω
f = 1kHz
f = 1kHz
V
IN
= ±1V
Amplifier Enabled
Amplifier Disabled
Amplifier Disabled
3.5
R
L
= 100k
R
L
= 100k
R
L
= 150Ω
R
L
= 150Ω
●
4.5
6
25
0.14
2.0
2.5
8.5
4.0
1.0
4.1
3.85
3.65
4.15
0.85
3.95
0.9
1.5
V
V
V
V
V
6559f
2
LT6559
5V ELECTRICAL CHARACTERISTICS
SYMBOL
V
OUTL
CMRR
PSRR
R
OL
I
OUT
I
S
I
⎯
E
⎯
N
SR
t
ON
t
OFF
t
r
, t
f
t
PD
os
t
S
dG
dP
PARAMETER
Maximum Output Voltage Swing, Low
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Transimpedance,
ΔV
OUT
/ΔI
IN–
Maximum Output Current
Supply Current per Amplifier
Disable Supply Current per Amplifier
Enable Pin Current
Slew Rate (Note 6)
Turn-On Delay Time (Note 7)
Turn-Off Delay Time (Note 7)
Small-Signal Rise and Fall Time
Propagation Delay
Small-Signal Overshoot
Settling Time
Differential Gain (Note 8)
Differential Phase (Note 8)
A
V
= 10, R
L
= 150Ω, V
S
= ±5V
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
S
= ±5V
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
S
= ±5V
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
OUT
= 1V
P-P
,
V
S
= ±5V
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
OUT
= 1V
P-P
,
V
S
= ±5V
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
OUT
= 1V
P-P
,
V
S
= ±5V
0.1%, A
V
= –1V, R
F
= R
G
= 301Ω, R
L
=
150Ω, V
S
= ±5V
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
S
= ±5V
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
S
= ±5V
⎯
E
⎯
N Pin Voltage = 4.5V, R
L
= 150Ω
The
●
denotes specifications which apply over the specified operating
temperature range, otherwise specifications are at T
A
= 25°C. For each amplifier: V
CM
= 2.5V, V
S
= 5V,
⎯
E
⎯
N = 0V, pulse tested, unless
otherwise noted. (Note 4)
CONDITIONS
R
L
= 150Ω
R
L
= 150Ω
V
CM
= 1.5V to 3.5V
V
S
= ±2V to ±5V,
⎯
E
⎯
N = V
–
V
OUT
= 1.5V to 3.5V, R
L
= 150Ω
R
L
= 0Ω
●
●
●
MIN
TYP
1.05
MAX
1.15
1.35
UNITS
V
V
dB
dB
kΩ
mA
40
56
40
50
70
80
65
3.9
0.1
30
500
30
40
1.3
2.5
10
25
0.13
0.10
75
100
6.1
100
mA
µA
µA
V/µs
ns
ns
ns
ns
%
ns
%
DEG
±5V ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
ΔV
OS
/ΔT
I
IN+
I
IN–
e
n
+i
n
–i
n
R
IN
C
IN
C
OUT
V
INH
V
INL
V
OUTH
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
Noninverting Input Current
Inverting Input Current
Input Noise Voltage Density
Noninverting Input Noise Current
Density
Inverting Input Noise Current Density
Input Resistance
Input Capacitance
Output Capacitance
Input Voltage Range, High
Input Voltage Range, Low
Maximum Output Voltage Swing, High
R
L
= 100k
The
●
denotes specifications which apply over the specified
operating temperature range, otherwise specifications are at T
A
= 25°C. For each amplifier: V
CM
= 0V, V
S
= ±5V,
⎯
E
⎯
N = 0V, pulse tested,
unless otherwise noted. (Note 4)
CONDITIONS
●
MIN
TYP
1.5
15
10
10
MAX
10
25
60
UNITS
mV
µV/°C
µA
µA
⎯
nV/√H
⎯
z
⎯
pA/√H
⎯
z
⎯
pA/√H
⎯
z
MΩ
pF
pF
pF
V
f = 1kHz, R
F
= 1k, R
G
= 10Ω, R
S
= 0Ω
f = 1kHz
f = 1kHz
V
IN
= ±3.5V
Amplifier Enabled
Amplifier Disabled
Amplifier Disabled
V
S
= ±5V
3.5
4.0
4.5
6
25
1
2.0
2.5
8.5
4.0
–4.0
4.2
–3.5
V
V
6559f
3
LT6559
±5V ELECTRICAL CHARACTERISTICS
SYMBOL
V
OUTL
V
OUTH
V
OUTL
CMRR
PSRR
R
OL
I
OUT
I
S
I
⎯
E
⎯
N
SR
t
ON
t
OFF
t
r
, t
f
t
PD
os
t
S
dG
dP
PARAMETER
Maximum Output Voltage Swing, Low
Maximum Output Voltage Swing, High
Maximum Output Voltage Swing, Low
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Transimpedance,
ΔV
OUT
/ΔI
IN–
Maximum Output Current
Supply Current per Amplifier
Disable Supply Current per Amplifier
Enable Pin Current
Slew Rate (Note 6)
Turn-On Delay Time (Note 7)
Turn-Off Delay Time (Note 7)
Small-Signal Rise and Fall Time
Propagation Delay
Small-Signal Overshoot
Settling Time
Differential Gain (Note 8)
Differential Phase (Note 8)
A
V
= 10, R
L
= 150Ω
R
F
= R
G
= 301Ω, R
L
= 150Ω
R
F
= R
G
= 301Ω, R
L
= 150Ω
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
OUT
= 1V
P-P
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
OUT
= 1V
P-P
R
F
= R
G
= 301Ω, R
L
= 150Ω, V
OUT
= 1V
P-P
0.1%, A
V
= –1, R
F
= R
G
= 301Ω, R
L
= 150Ω
R
F
= R
G
= 301Ω, R
L
= 150Ω
R
F
= R
G
= 301Ω, R
L
= 150Ω
500
R
L
= 100k
R
L
= 150Ω
R
L
= 150Ω
R
L
= 150Ω
R
L
= 150Ω
V
CM
= ±3.5V
V
S
= ±2V to ±5V,
⎯
E
⎯
N = V
–
V
OUT
= ±2V, R
L
= 150Ω
R
L
= 0Ω
V
OUT
= 0V
⎯
E
⎯
N Pin Voltage = 4.5V, R
L
= 150Ω
●
●
●
●
The
●
denotes specifications which apply over the specified
operating temperature range, otherwise specifications are at T
A
= 25°C. For each amplifier: V
CM
= 0V, V
S
= ±5V,
⎯
E
⎯
N = 0V, pulse tested,
unless otherwise noted. (Note 4)
CONDITIONS
MIN
3.4
3.2
TYP
–4.2
3.6
–3.6
42
56
40
52
70
100
100
4.6
0.1
30
800
30
40
1.3
2.5
10
25
0.13
0.10
75
100
6.5
100
–3.4
–3.2
MAX
–4.0
UNITS
V
V
V
V
V
dB
dB
kΩ
mA
mA
µA
µA
V/µs
ns
ns
ns
ns
%
ns
%
DEG
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
This parameter is guaranteed to meet specified performance
through design and characterization. It has not been tested.
Note 3:
A heat sink may be required depending on the power supply
voltage and how many amplifiers have their outputs short circuited.
Note 4:
The LT6559 is guaranteed to meet specified performance from 0°C
to 70°C and is designed, characterized and expected to meet these extended
temperature limits, but is not tested or QA sampled at –40°C and 85°C.
Note 5:
T
J
is calculated from the ambient temperature T
A
and the power
dissipation P
D
according to the following formula: T
J
= T
A
+ (P
D
• 68°C/W)
Note 6:
At ±5V, slew rate is measured at ±2V on a ±3V output signal. At 5V,
slew rate is measured from 2V to 3V on a 1.5V to 3.5V output signal. Slew
rate is 100% production tested at ±5V for both the rising and falling edge
of the B channel. The slew rate of the R and G channels is guaranteed
through design and characterization.
Note 7:
Turn-on delay time (t
ON
) is measured from control input to
appearance of 1V at the output, for V
IN
= 1V. Likewise, turn-off delay
time (t
OFF
) is measured from control input to appearance of 0.5V on the
output for V
IN
= 0.5V. This specification is guaranteed by design and
characterization.
Note 8:
Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R Video
Measurement Set. The resolution of this equipment is 0.1% and 0.1°. Ten
identical amplifier stages were cascaded giving an effective resolution of
0.01% and 0.01°.
Note 9:
The LT6559 is guaranteed functional over the operating
temperature range of –40°C to 85°C.
TYPICAL AC PERFORMANCE
V
S
(V)
±5, 5
±5, 5
±5, 5
A
V
1
2
–1
R
L
(Ω)
150
150
150
R
F
(Ω)
365
301
301
R
G
(Ω)
-
301
301
SMALL SIGNAL
–3dB BW (MHz)
300
300
300
SMALL SIGNAL
0.1dB BW (MHz)
150
150
150
SMALL SIGNAL
PEAKING (dB)
0.05
0
0
6559f
4
LT6559
TYPICAL PERFORMANCE CHARACTERISTICS
Closed-Loop Gain vs Frequency
(A
V
= 1)
4
2
GAIN (dB)
0
–2
–4
1M
10M
100M
FREQUENCY (Hz)
V
S
=
±5V
V
IN
= –10dBm
R
F
= 365Ω
R
L
= 150Ω
1G
6559 G01
Closed-Loop Gain vs Frequency
(A
V
= 2)
10
8
GAIN (dB)
6
4
2
1M
10M
100M
FREQUENCY (Hz)
V
S
=
±5V
V
IN
= –10dBm
R
F
= R
G
= 301Ω
R
L
= 150Ω
1G
6559 G02
Closed-Loop Gain vs Frequency
(A
V
= –1)
4
2
GAIN (dB)
0
–2
–4
1M
10M
100M
FREQUENCY (Hz)
V
S
=
±5V
V
IN
= –10dBm
R
F
= R
G
= 301Ω
R
L
= 150Ω
1G
6559 G03
Large-Signal Transient Response
(A
V
= 1)
Large-Signal Transient Response
(A
V
= 2)
Large-Signal Transient Response
(A
V
= –1)
OUTPUT (1V/DIV)
OUTPUT (1V/DIV)
V
S
=
±5V
V
IN
=
±2.5V
R
F
= 365Ω
R
L
= 150Ω
TIME (5ns/DIV)
6559 G04
TIME (5ns/DIV)
V
S
=
±5V
V
IN
=
±1.25V
R
F
= R
G
= 301Ω
R
L
= 150Ω
6559 G05
OUTPUT (1V/DIV)
TIME (5ns/DIV)
V
S
=
±5V
V
IN
=
±2.5V
R
F
= R
G
= 301Ω
R
L
= 150Ω
6559 G06
2nd and 3rd Harmonic Distortion
vs Frequency
30
T
A
= 25°C
R
F
= R
G
= 301Ω
40
R
L
= 150Ω
50 V
S
=
±
5V
V
OUT
= 2VPP
60
HD2
70
80
90
100
110
1
10
100
1000 10000 100000
FREQUENCY (kHz)
6559 G07
Maximum Undistorted Output
Voltage vs Frequency
8
7
OUTPUT VOLTAGE (V
P-P
)
A
V
= +1
6
5
4
3
2
1
T
A
= 25°C
R
F
= 301Ω
R
L
= 150Ω
V
S
=
±
5V
10
FREQUENCY (MHz)
100
6559
G08
PSRR vs Frequency
80
70
A
V
= +2
PSRR (dB)
60
50
40
30
20
10
T
A
= 25°C
R
F
= R
G
= 301Ω
R
L
= 150Ω
A
V
= +2
100k
1M
10M
FREQUENCY (Hz)
100M
6559 G09
DISTORTION (dB)
– PSRR
+ PSRR
HD3
0
10k
6559f
5
51单片机
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