LMH6570
2:1 High Speed Video Multiplexer
General Description
The LMH
TM
6570 is a high performance analog multiplexer
optimized for professional grade video and other high fidelity
high bandwidth analog applications. The output amplifier
selects one of two buffered input signals based on the state
of the SEL pin. The LMH6570 provides a 400 MHz band-
width at 2 V
PP
output signal levels. Multimedia and high
definition television (HDTV) applications can benefit from the
LMH6570's 0.1 dB bandwidth of 150 MHz and its 2200 V/s
slew rate.
The LMH6570 supports composite video applications with its
0.02% and 0.05 differential gain and phase errors for NTSC
and PAL video signals while driving a single, back terminated
75
load. An 80 mA linear output current is available for
driving multiple video load applications.
The LMH6570 gain is set by external feedback and gain set
resistors for maximum flexibility.
The LMH6570 is available in the 8 pin SOIC package.
Features
n
500 MHz, 500 mV
PP
, -3 dB bandwidth, A
V
=2
n
400 MHz, 2V
PP
, -3 dB bandwidth, A
V
=2
n
8 ns channel switching time
n
70 dB channel to channel isolation
@
10 MHz
n
0.02%, 0.05 diff. gain, diff. phase
n
0.1 dB gain flatness to 150 MHz
n
2200 V/s slew rate
n
Wide supply voltage range: 6V (
3V) to 12V (
6V)
n
-68 dB HD2
@
5 MHz
n
-84 dB HD3
@
5 MHz
Applications
n
Video router
n
Multi input video monitor
n
Instrumentation / Test equipment
n
Receiver IF diversity switch
n
Multi channel A/D driver
n
Picture in Picture video switch
Connection Diagram
8-Pin SOIC
20129905
Top View
Truth Table
SEL
SD
OUTPUT
1
0
IN1 * (1+RF/RG)
0
0
IN0 * (1+RF/RG)
X
1
Shutdown
LMH
TM
is a trademark of National Semiconductor Corporation.
May 2005
LMH6570
2:1
High
Speed
V
ideo
Multiplexer
2005 National Semiconductor Corporation
DS201299
www.national.com
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
ESD Tolerance
(Note 4)
Human Body Model
2000V
Machine Model
200V
Supply Voltage (V
+
- V
-
)
13.2V
I
OUT
(Note 3)
130 mA
Signal & Logic Input Pin Voltage
(V
S
+0.6V)
Signal & Logic Input Pin Current
20 mA
Maximum Junction Temperature
+150C
Storage Temperature Range
-65C to +150C
Soldering Information
Infrared or Convection (20 sec)
235 C
Wave Soldering (10 sec)
260 C
Operating Ratings
(Note 1)
Operating Temperature
-40 C to 85 C
Supply Voltage Range
6V to 12V
Thermal Resistance
Package
(
JA
)
(
JC
)
8-Pin SOIC
150C/W
50C/W
5V Electrical Characteristics
V
S
=
5V, R
L
= 100
, R
F
=576
, A
V
=2 V/V, T
J
=25 C, Unless otherwise specified. Bold numbers specify limits at temperature
extremes.
Symbol
Parameter
Conditions (Note 2)
Min
(Note 5)
Typ
(Note 9)
Max
(Note 5)
Units
Frequency Domain Performance
SSBW
-3 dB Bandwidth
V
OUT
= 0.5 V
PP
500
MHz
LSBW
3 dB Bandwidth
V
OUT
= 2 V
PP
400
MHz
.1 dBBW 0.1 dB Bandwidth
V
OUT
= 0.25 V
PP
150
MHz
DG
Differential Gain
R
L
= 150
, f=4.43 MHz
0.02
%
DP
Differential Phase
R
L
= 150
, f=4.43 MHz
0.05
deg
XTLK
Channel to Channel Crosstalk
All Hostile, f = 5 MHz
-70
dBc
Time Domain Response
TRS
Channel to Channel Switching Time
Logic transition to 90% output
8
ns
Enable and Disable Times
Logic transition to 90% or 10%
output.
10
ns
TRL
Rise and Fall Time
4V Step
2.4
ns
TSS
Settling Time to 0.05%
2V Step
17
ns
OS
Overshoot
2V Step
5
%
SR
Slew Rate
4V Step, (Note 8)
2200
V/s
Distortion
HD2
2
nd
Harmonic Distortion
2 V
PP
, 5 MHz
-68
dBc
HD3
3
rd
Harmonic Distortion
2 V
PP
, 5 MHz
-84
dBc
IMD
3
rd
Order Intermodulation Products
10 MHz, Two tones 2 Vpp at output
-80
dBc
Equivalent Input Noise
VN
Voltage
>
1 MHz, Input Referred
5
nV
ICN
Current
>
1 MHz, Input Referred
5
pA/
Static, DC Performance
CHGM
Channel to Channel Gain Difference
DC, Difference in gain between
channels
0.005
0.034
0.036
%
VIO
Input Offset Voltage
V
IN
= 0V
1
15
21
mV
DVIO
Offset Voltage Drift (Note 10)
30
V/C
IBN
Input Bias Current (Note 7)
V
IN
= 0V
-3
5.5
6.2
A
DIBN
Bias Current Drift (Note 10)
11
nA/C
IBI
Inverting Input Bias Current (Note 7)
Pin 8, Feedback point,
V
IN
= 0V
-3
18
22
uA
PSRR
Power Supply Rejection Ratio
DC, Input referred
48
46
50
dB
LMH6570
www.national.com
2
5V Electrical Characteristics
(Continued)
V
S
=
5V, R
L
= 100
, R
F
=576
, A
V
=2 V/V, T
J
=25 C, Unless otherwise specified. Bold numbers specify limits at temperature
extremes.
Symbol
Parameter
Conditions (Note 2)
Min
(Note 5)
Typ
(Note 9)
Max
(Note 5)
Units
ICC
Supply Current
No Load, Shutdown Pin (SD)
>
0.8V
13.8
15
16
mA
Supply Current Shutdown
Shutdown Pin (SD)
>
2V
1.1
1.3
1.4
mA
VIH
Logic High Threshold
Select Pin & Shutdown pin (SEL,
SD)
2.0
V
VIL
Logic Low Threshold
Select Pin & Shutdown pin (SEL,
SD)
0.8
V
IiL
Logic Pin Input Current Low (Note 7)
Logic Input = 0V Select Pin &
Shutdown pin (SEL, SD)
-2.9
-10
-1
A
IiH
Logic Pin Input Current High (Note 7)
Logic Input = 5.0V, Select Pin &
Shutdown pin (SEL, SD)
57
68
75
A
Miscellaneous Performance
RIN+
Input Resistance
5
k
CIN
Input Capacitance
0.8
pF
ROUT
Output Resistance
Output Active, (SD
<
0.8V)
0.04
ROUT
Output Resistance
Output Disabled, (SD
>
2V)
3000
COUT
Output Capacitance
Output Disabled, (SD
>
2V)
3.1
pF
VO
Output Voltage Range
No Load
3.51
3.50
3.7
V
VOL
R
L
= 100
3.16
3.15
3.5
V
CMIR
Input Voltage Range
2.5
2.6
V
IO
Linear Output Current (Note 7)
V
IN
= 0V,
+60
-70
55
80
mA
ISC
Short Circuit Current(Note 3)
V
IN
=
2V, Output shorted to
ground
230
mA
3.3V Electrical Characteristics
V
S
=
3.3V, R
L
= 100
, R
F
=576
, A
V
=2 V/V; Unless otherwise specified.
Symbol
Parameter
Conditions (Note 2)
Min
(Note 5)
Typ
(Note 9)
Max
(Note 5)
Units
Frequency Domain Performance
SSBW
-3 dB Bandwidth
V
OUT
= 0.5 V
PP
475
MHz
LSBW
-3 dB Bandwidth
V
OUT
= 2.0 V
PP
375
MHz
0.1 dBBW
0.1 dB Bandwidth
V
OUT
= 0.5 V
PP
100
MHz
GFP
Peaking
DC to 200 MHz
0.4
dB
XTLK
Channel to Channel Crosstalk
All Hostile, f = 5 MHz
-70
dBc
Time Domain Response
TRL
Rise and Fall Time
2V Step
2
ns
TSS
Settling Time to 0.05%
2V Step
20
ns
OS
Overshoot
2V Step
5
%
SR
Slew Rate
2V Step
1400
V/s
Distortion
HD2
2
nd
Harmonic Distortion
2 V
PP
, 10 MHz
-67
dBc
HD3
3
rd
Harmonic Distortion
2 V
PP
, 10 MHz
-87
dBc
Static, DC Performance
LMH6570
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3
3.3V Electrical Characteristics
(Continued)
V
S
=
3.3V, R
L
= 100
, R
F
=576
, A
V
=2 V/V; Unless otherwise specified.
Symbol
Parameter
Conditions (Note 2)
Min
(Note 5)
Typ
(Note 9)
Max
(Note 5)
Units
VIO
Input Offset Voltage
V
IN
= 0V
1
mV
IBN
Input Bias Current (Note 7)
V
IN
= 0V
-3
A
PSRR
Power Supply Rejection Ratio
DC, Input Referred
49
dB
ICC
Supply Current
No Load
12.5
mA
VIH
Logic High Threshold
Select Pin & Shutdown pin (SEL,
SD),
VIH )V
+
* 0.4
1.3
V
VIL
Logic Low Threshold
Select Pin & Shutdown pin (SEL,
SD),
VIL )V
+
* 0.12
0.4
V
Miscellaneous Performance
RIN+
Input Resistance
5
k
CIN
Input Capacitance
0.8
pF
ROUT
Output Resistance
0.06
VO
Output Voltage Range
No Load
2
V
VOL
R
L
= 100
1.8
V
CMIR
Input Voltage Range
1.2
V
IO
Linear Output Current (Note 3)
V
IN
= 0V
60
mA
ISC
Short Circuit Current (Note 3)
V
IN
=
1V, Output shorted to
ground
150
mA
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed specifications, see the Electrical Characteristics tables.
Note 2: Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very limited self-heating of
the device such that T
J
= T
A
. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self heating where T
J
>
T
A
.
See Applications Section for information on temperature de-rating of this device. Min/Max ratings are based on product testing, characterization and simulation.
Individual parameters are tested as noted.
Note 3: The maximum output current (I
OUT
) is determined by the device power dissipation limitations (The junction temperature cannot be allowed to exceed
150C). See the Power Dissipation section of the Application Section for more details. A short circuit condition should be limited to 5 seconds or less.
Note 4: Human Body model, 1.5k
in series with 100pF. Machine model, 0 In series with 200pF
Note 5: Limits are 100% production tested at 25C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods.
Note 6: Parameter guaranteed by design.
Note 7: Positive Value is current into device.
Note 8: Slew Rate is the average of the rising and falling edges.
Note 9: Typical numbers are the most likely parametric norm.
Note 10: Drift determined by dividing the change in parameter at temperature extremes by the total temperature change.
Ordering Information
Package
Part Number
Package Marking
Transport Media
NSC Drawing
8-Pin SOIC
LMH6570MA
LMH6570MA
95 Units/Rail
M08A
LMH6570MAX
2.5k Units Tape and Reel
LMH6570
www.national.com
4
Typical Performance Characteristics
V
s
=
5V, R
L
= 100
, A
V
=2, R
F
=R
G
=576
; unless otherwise
specified.
Frequency Response vs. V
OUT
Frequency Response vs. Gain
20129902
20129903
Frequency Response vs. Capacitive Load
Suggested R
OUT
vs. Capacitive Load
20129914
20129915
Suggested Value of R
F
vs. Gain
Pulse Response 4V
PP
20129901
20129925
LMH6570
www.national.com
5
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