LMH6739
Very Wideband, Low Distortion Triple Video Buffer
General Description
The LMH6739 is a very wideband, DC coupled monolithic
programmable gain buffer designed specifically for ultra high
resolution video systems as well as wide dynamic range
systems requiring exceptional signal fidelity. Benefiting from
National's current feedback architecture, the LMH6739 of-
fers gains of -1, 1 and 2. At a gain of +2 the LMH6739
supports ultra high resolution video systems with a 400 MHz
2 V
PP
3 dB Bandwidth. With 12-bit distortion level through 30
MHz (R
L
= 100
), 2.3nV/
input referred noise, the
LMH6739 is the ideal driver or buffer for high speed flash A/D
and D/A converters. Wide dynamic range systems such as
radar and communication receivers requiring a wideband
amplifier offering exceptional signal purity will find the
LMH6739's low input referred noise and low harmonic dis-
tortion make it an attractive solution. The LMH6739 is avail-
able in a space saving SSOP package.
Features
n
750 MHz -3 dB small signal bandwidth (A
V
= +1)
n
-85 dBc 3
rd
harmonic distortion (20 MHz)
n
2.3 nV/
input noise voltage
n
3300 V/s slew rate
n
32 mA supply current (10.6 mA per op amp)
n
90 mA linear output current
n
0.02/0.01 Diff. Gain / Diff. Phase (R
L
= 150
)
n
2mA shutdown current
Applications
n
RGB video driver
n
High resolution projectors
n
Flash A/D driver
n
D/A transimpedance buffer
n
Wide dynamic range IF amp
n
Radar/communication receivers
n
DDS post-amps
n
Wideband inverting summer
n
Line driver
Connection Diagram
16-Pin SSOP
20104110
Top View
Ordering Information
Package
Part Number
Package Marking
Transport Media
NSC Drawing
16-pin SSOP
LMH6739MQ
LH6739MQ
95 Units/Rail
MQA16
LMH6739MQX
2.5k Units Tape and Reel
VIP10
TM
is a trademark of National Semiconductor Corporation.
November 2004
LMH6739
V
ery
W
ideband,
Low
Distortion
T
riple
V
ideo
Buffer
2004 National Semiconductor Corporation
DS201041
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.
Supply Voltage (V
+
- V
)
13.2V
I
OUT
(Note 3)
Common Mode Input Voltage
V
CC
Maximum Junction Temperature
+150C
Storage Temperature Range
-65C to +150C
Soldering Information
Infrared or Convection (20 sec.)
235C
Wave Soldering (10 sec.)
260C
ESD Tolerance (Note 4)
Human Body Model
2000V
Machine Model
200V
Storage Temperature Range
-65C to +150C
Operating Ratings
(Note 1)
Operating Temperature Range
-40C
+85C
Supply Voltage (V
+
- V
)
8V
to
12V
Thermal Resistance
Package
(
JC
)
(
JA
)
16-Pin SSOP
36C/W
120C/W
Electrical Characteristics
(Note 2)
A
V
= +2, V
CC
=
5V, R
L
= 100
; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Frequency Domain Performance
UGBW
-3 dB Bandwidth
Unity Gain, V
OUT
= 200 mV
PP
750
MHz
SSBW
-3 dB Bandwidth
V
OUT
= 200 mV
PP
480
MHz
LSBW
V
OUT
= 2 V
PP
400
0.1 dB Bandwidth
V
OUT
= 2 V
PP
150
MHz
GFR2
Rolloff
@
300 MHz, V
OUT
= 2 V
PP
1.0
dB
Time Domain Response
TRS
Rise and Fall Time
(10% to 90%)
2V Step
0.9
ns
TRL
5V Step
1.7
SR
Slew Rate
5V Step
3300
V/s
t
s
Settling Time to 0.1%
2V Step
10
ns
t
e
Enable Time
From Disable = rising edge.
7.3
ns
t
d
Disable Time
From Disable = falling edge.
4.5
ns
Distortion
HD2L
2
nd
Harmonic Distortion
2 V
PP
, 5 MHz
-80
dBc
HD2
2 V
PP
, 20 MHz
-71
HD2H
2 V
PP
, 50 MHz
-55
HD3L
3
rd
Harmonic Distortion
2 V
PP
, 5 MHz
-90
dBc
HD3
2 V
PP
, 20 MHz
-85
HD3H
2 V
PP
, 50 MHz
-65
Equivalent Input Noise
V
N
Non-Inverting Voltage
>
1 MHz
2.3
nV/
I
CN
Inverting Current
>
1 MHz
12
pA/
N
CN
Non-Inverting Current
>
1 MHz
3
pA/
Video Performance
DG
Differential Gain
4.43 MHz, R
L
= 150
.02
%
DP
Differential Phase
4.43 MHz, R
L
= 150
.01
degree
Static, DC Performance
V
OS
Input Offset Voltage (Note 6)
0.5
2.5
4.5
mV
I
BN
Input Bias Current (Note 6)
Non-Inverting
-16
-21
-8
0
+5
V
I
BI
Input Bias Current (Note 6)
Inverting
-2
30
40
A
PSRR
Power Supply Rejection Ratio
(Note 6)
50
48.5
53
dB
LMH6739
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2
Electrical Characteristics
(Note 2) (Continued)
A
V
= +2, V
CC
=
5V, R
L
= 100
; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
CMRR
Common Mode Rejection Ratio
(Note 6)
46
44
50
dB
I
CC
Supply Current (Note 6)
All three amps Enabled, No
Load
32
35
40
mA
Supply Current Disabled V
+
R
L
=
1.9
2.2
mA
Supply Current Disabled V
-
R
L
=
1.1
1.3
mA
Internal Feedback & Gain Set
Resistor Value
375
450
525
Gain Error
R
L
=
0.2
1.1
%
Miscellaneous Performance
R
IN
+
Non-Inverting Input Resistance
1000
k
C
IN
+
Non-Inverting Input Capacitance
.8
pF
R
IN
-
Inverting Input Impedance
Output impedance of input
buffer.
30
R
O
Output Impedance
DC
0.05
V
O
Output Voltage Range (Note 6)
R
L
= 100
3.25
3.1
3.5
V
R
L
=
3.65
3.5
3.8
CMIR
Common Mode Input Range
(Note 6)
CMRR
>
40 dB
1.9
1.7
2.0
V
I
O
Linear Output Current (Note 3)
(Note 6)
V
IN
= 0V, V
OUT
<
30 mV
80
60
90
mA
I
SC
Short Circuit Current (Note 5)
V
IN
= 2V Output Shorted to
Ground
160
mA
I
IH
Disable Pin Bias Current High
Disable Pin = V
+
10
A
I
IL
Disable Pin Bias Current Low
Disable Pin = 0V
-350
A
V
DMAX
Voltage for Disable
Disable Pin
V
DMAX
0.8
V
V
DMIM
Voltage for Enable
Disable Pin
V
DMIN
2.0
V
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 characterization and simulation. Individual
parameters are tested as noted.
Note 3: The maximum output current (I
OUT
) is determined by device power dissipation limitations. See the Power Dissipation section of the Application Section for
more details.
Note 4: Human body model: 1.5 k
in series with 100 pF. Machine model: 0 in series with 200 pF.
Note 5: Short circuit current should be limited in duration to no more than 10 seconds. See the Power Dissipation section of the Application Section for more details.
Note 6: Parameter 100% production tested at 25 C.
LMH6739
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3
Typical Performance Characteristics
A
V
= +2, V
CC
=
5V, R
L
= 100
; unless otherwise specified).
Large Signal Frequency Response
Small Signal Frequency Response
20104131
20104132
Frequency Response vs. V
OUT
Frequency Response vs. Supply Voltage
20104101
20104116
Pulse Response
Frequency Response vs. Capacitive Load
20104122
20104114
LMH6739
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4
Typical Performance Characteristics
A
V
= +2, V
CC
=
5V, R
L
= 100
; unless otherwise
specified). (Continued)
Series Output Resistance vs. Capacitive Load
Open Loop Gain and Phase
20104119
20104126
Distortion vs. Frequency
10 MHz HD vs. Output Level
20104135
20104134
Distortion vs. Supply Voltage
CMRR vs. Frequency
20104118
20104111
LMH6739
www.national.com
5
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