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LMH6574
4:1 High Speed Video Multiplexer
LMH6574 4:1 High Speed Video Multiplexer
November 2004
General Description
The LMH™6574 is a high performance analog multiplexer
optimized for professional grade video and other high fidelity
high bandwidth analog applications. The output amplifier
selects any one of four buffered input signals based on the
state of the two address bits. The LMH6574 provides a 400
MHz bandwidth at 2 V
high definition television (HDTV) applications can benefit
from the LMH6574’s 0.1 dB bandwidth of 150 MHz and its
2200 V/µs slew rate.
The LMH6574 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
75Ω load. An 80 mA linear output current is available for
driving multiple video load applications.
The LMH6574 gain is set by external feedback and gain set
resistors for maximum flexibility.
The LMH6574 is available in the 14 pin SOIC package.
output signal levels. Multimedia and
PP
Connection Diagram
14-Pin SOIC
Features
n 500 MHz, 500 mV −3 dB bandwidth, AV=2
n 400 MHz, 2V
n 8 ns channel switching time
n 70 dB channel to channel isolation
n 0.02%, 0.05˚ diff. gain, phase
n 0.1 dB gain flatness to 150 MHz
n 2200 V/µs slew rate
n Wide supply voltage range: 6V (
n −68 dB HD2
n −84 dB HD3
−3 dB bandwidth, AV=2
PP
@
5 MHz
@
5 MHz
@
10 MHz
±
3V) to 12V (±6V)
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
Truth Table
A1 A0 EN SD OUT
1100CH3
1000CH2
0100CH1
0000CH0
X X 1 0 Disable
X X X 1 Shutdown
Top View
20119705
Ordering Information
Package Part Number Package Marking Transport Media NSC Drawing
14-Pin SOIC
LMH™is a trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS201197 www.national.com
LMH6574MA
LMH6574MAX 2.5k Units Tape and Reel
LH6574MA
55 Units/Rail
M14A
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
LMH6574
Distributors for availability and specifications.
Storage Temperature Range −65˚C to +150˚C
Soldering Information
Infrared or Convection (20 sec) 235 ˚C
Wave Soldering (10 sec) 260 ˚C
ESD Tolerance (Note 4)
Human Body Model 2000V
Operating Ratings (Note 1)
Machine Model 200V
+−V−
Supply Voltage (V
I
(Note 3) 130 mA
OUT
Signal & Logic Input Pin Voltage
Signal & Logic Input Pin Current
) 13.2V
±
(VS+0.6V)
±
20 mA
Maximum Junction Temperature +150˚C
±
5V Electrical Characteristics
Operating Temperature −40 ˚C to 85 ˚C
Supply Voltage Range 6V to 12V
Thermal Resistance
Package (θ
)(θJC)
JA
14-Pin SOIC 130˚C/W 40˚C/W
VS=±5V, RL= 100Ω,AV=2 V/V, TJ=25 ˚C, Unless otherwise specified. Bold numbers specify limits at temperature extremes.
Symbol Parameter Conditions (Note 2) Min Typ Max Units
Frequency Domain Performance
SSBW −3 dB Bandwidth V
LSBW –3 dB Bandwidth V
.1 dBBW 0. 1 dB Bandwidth V
DG Differential Gain R
DP Differential Phase R
= 0.5V
OUT
OUT
OUT
= 150Ω, f=4.43 MHz 0.02 %
L
= 150Ω, f=4.43MHz 0.05 deg
L
=2V
PP
= 0.25V
PP
PP
500 MHz
400 MHz
150 MHz
XTLK Channel to Channel Crosstalk All Hostile, 5MHz −85 dB
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%
10 ns
output.
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 2200 V/µs
Distortion
HD2 2
HD3 3
IMD 3
nd
Harmonic Distortion 2VPP, 5 MHz −68 dBc
rd
Harmonic Distortion 2VPP, 5 MHz −84 dBc
rd
Order Intermodulation Products 10MHz, Two tones 2Vpp at output −80 dBc
Equivalent Input Noise
VN Voltage
ICN Current
>
1MHz, Input Referred 5 nV
>
1MHz, Input Referred 5 pA/
Static, DC Performance
CHGM Channel to Channel Gain
Difference
VIO Input Offset Voltage (Note 5) V
DC, Difference in gain between
channels
=0V 1
IN
±
0.005
±
0.032
±
0.035
±
±
20
25
DVIO Offset Voltage Drift 30 µV/˚C
IBN Input Bias Current (Notes 7, 5) V
=0V −3
IN
±
5
±
5.6
DIBN Bias Current Drift 11 nA/˚C
Inverting Input Bias Current Pin 12, Feedback point,
PSRR Power Supply Rejection Ratio
(Note 5)
V
=0V
IN
DC, Input referred 47
45
−7
54 dB
±
10
±
13
%
mV
µA
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±
5V Electrical Characteristics (Continued)
VS=±5V, RL= 100Ω,AV=2 V/V, TJ=25 ˚C, Unless otherwise specified. Bold numbers specify limits at temperature extremes.
Symbol Parameter Conditions (Note 2) Min Typ Max Units
ICC Supply Current (Note 5) No Load 13 16
18
Supply Current Disabled(Note 5) ENABLE
Supply Current Shutdown SHUTDOWN>2V 1.8 2.5
VIH Logic High Threshold(Note 5) Select & Enable Pins (SD & EN) 2.0 V
VIL Logic Low Threshold (Note 5) Select & Enable Pins (SD & EN)
IiL Logic Pin Input Current Low (Note7)Logic Input = 0V Select & Enable
Pins (SD & EN)
IiH Logic Pin Input Current High (Note7)Logic Input = 2.0V, Select & Enable
Pins (SD & EN)
Miscellaneous Performance
RIN+ Input Resistance 5kΩ
CIN Input Capacitance 0.8 pF
ROUT Output Resistance Output Active, (EN and SD
ROUT Output Resistance Output Disabled, (EN or SD
COUT Output Capacitance Output Disabled, (EN or SD
VO Output Voltage Range No Load
VOL R
CMIR Input Voltage Range
IO Linear Output Current (Notes 5, 7) V
ISC Short Circuit Current(Note 3) V
ground
>
2V 4.7 5.8
<
0.8 V) 0.04 Ω
>
2V) 3000 Ω
>
2V) 3.1 pF
= 100Ω
L
= 0V, +60
IN
=±2V, Output shorted to
IN
−2.9
-8.5
±
3.54
±
3.53
±
3.18
±
3.17
±
-70
+50
−60
2.5
5.9
2.6
0.8 V
−1 µA
47 68
72.5
±
3.7 V
±
3.5 V
±
2.6 V
±
80 mA
±
230 mA
mA
mA
mA
µA
LMH6574
±
3.3V Electrical Characteristics
VS=±3.3V, RL= 100Ω,AV=2 V/V; Unless otherwise specified.
Symbol Parameter Conditions (Note 2) Min Typ Max Units
Frequency Domain Performance
SSBW −3 dB Bandwidth V
LSBW −3 dB Bandwidth V
0.1 dBBW 0.1 dB Bandwidth V
GFP Peaking DC to 200MHz 0.4 dB
XTLK Channel to Channel Crosstalk All Hostile, f=5MHz −85 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/µs
Distortion
HD2 2
HD3 3
Static, DC Performance
VIO Input Offset Voltage V
nd
Harmonic Distortion 2 VPP, 10MHz −67 dBc
rd
Harmonic Distortion 2 VPP, 10MHz −87 dBc
= 0.5V
OUT
OUT
OUT
=0V -5 mV
IN
= 2.0V
= 0.5V
PP
PP
PP
475 MHz
375 MHz
100 MHz
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±
3.3V Electrical Characteristics (Continued)
VS=±3.3V, RL= 100Ω,AV=2 V/V; Unless otherwise specified.
LMH6574
Symbol Parameter Conditions (Note 2) Min Typ Max Units
IBN Input Bias Current (Note 7) V
=0V -3 µA
IN
PSRR Power Supply Rejection Ratio DC, Input Referred 49 dB
ICC Supply Current No Load 12 mA
VIH Logic High Threshold Select & Enable Pins (SD & EN)
VIL Logic Low Threshold Select & Enable Pins (SD & EN)
1.3 V
0.4 V
Miscellaneous Performance
RIN+ Input Resistance 5kΩ
CIN Input Capacitance 0.8 pF
ROUT Output Resistance 0.06 Ω
VO Output Voltage Range No Load
VOL R
= 100Ω
L
CMIR Input Voltage Range
IO Linear Output Current V
ISC Short Circuit Current V
=0V
IN
=±1V, Output shorted to
IN
±
2V
±
1.8 V
±
1.2 V
±
60 mA
±
150 mA
ground
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
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
150˚C). 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, 1.5kΩ in series with 100pF. Machine model, 0Ω In series with 200pF
Note 5: Parameters guaranteed by electrical testing at 25˚C.
Note 6: Parameters guaranteed by design.
Note 7: Positive Value is current into device.
. No guarantee of parametric performance is indicated in the electrical tables under conditions of internal self heating where T
J=TA
) is determined by the device power dissipation limitations (The junction temperature cannot be allowed to exceed
OUT
>
TA.
J
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LMH6574
Typical Performance Characteristics V
specified.
Frequency Response vs. V
Frequency Response vs. Capacitive Load Suggested R
OUT
20119702 20119703
=±5V, RL= 100Ω,AV=2, RF=RG=575Ω; unless otherwise
s
Frequency Response vs. Gain
vs. Capacitive Load
OUT
20119714
Suggested Value of RFvs. Gain Pulse Response 4V
20119701
20119715
PP
20119725
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