LMH6642/6643/6644
3V, Low Power, 130MHz, 75mA Rail-to-Rail Output
Amplifiers
General Description
The LMH664X family true single supply voltage feedback
amplifiers offer high speed (130MHz), low distortion
(-62dBc), and exceptionally high output current (approxi-
mately 75mA) at low cost and with reduced power consump-
tion when compared against existing devices with similar
performance.
Input common mode voltage range extends to 0.5V below V
-
and 1V from V
+
. Output voltage range extends to within
40mV of either supply rail, allowing wide dynamic range
especially desirable in low voltage applications. The output
stage is capable of approximately 75mA in order to drive
heavy loads. Fast output Slew Rate (130V/s) ensures large
peak-to-peak output swings can be maintained even at
higher speeds, resulting in exceptional full power bandwidth
of 40MHz with a 3V supply. These characteristics, along with
low cost, are ideal features for a multitude of industrial and
commercial applications.
Careful attention has been paid to ensure device stability
under all operating voltages and modes. The result is a very
well behaved frequency response characteristic (0.1dB gain
flatness up the 12MHz under 150
load and A
V
= +2) with
minimal peaking (typically 2dB maximum) for any gain set-
ting and under both heavy and light loads. This along with
fast settling time (68ns) and low distortion allows the device
to operate well in ADC buffer, and high frequency filter
applications as well as other applications.
This device family offers professional quality video perfor-
mance with low DG (0.01%) and DP (0.01) characteristics.
Differential Gain and Differential Phase characteristics are
also well maintained under heavy loads (150
) and through-
out the output voltage range. The LMH664X family is offered
in single (LMH6642), dual (LMH6643), and quad (LMH6644)
options. See ordering information for packages offered.
Features
(V
S
=
5V, T
A
= 25C, R
L
= 2k
, A
V
= +1. Typical values
unless specified).
n
-3dB BW (A
V
= +1)
130MHz
n
Supply voltage range
3V to 12.8V
n
Slew rate (Note 8), (A
V
= -1)
130V/s
n
Supply current (no load)
2.7mA/amp
n
Output short circuit current
+115mA/-145mA
n
Linear output current
75mA
n
Input common mode volt.
0.5V beyond V
-
, 1V from V
+
n
Output voltage swing
40mV from rails
n
Input voltage noise (100kHz)
17nV/
n
Input current noise (100kHz)
0.9pA/
n
THD (5MHz, R
L
= 2k
, V
O
= 2V
PP
, A
V
= +2)
-62dBc
n
Settling time
68ns
n
Fully characterized for 3V, 5V, and
5V
n
Overdrive recovery
100ns
n
Output short circuit protected (Note 11)
n
No output phase reversal with CMVR exceeded
Applications
n
Active filters
n
CD/DVD ROM
n
ADC buffer amp
n
Portable video
n
Current sense buffer
Closed Loop Gain vs. Frequency for Various Gain
Large Signal Frequency Response
20018535
20018547
May 2003
LMH6642/6643/6644
3V
,
Low
Power
,
130MHz,
75mA
Rail-to-Rail
Output
Amplifiers
2003 National Semiconductor Corporation
DS200185
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
2KV (Note 2)
200V (Note 9)
V
IN
Differential
2.5V
Output Short Circuit Duration
(Note 3), (Note 11)
Supply Voltage (V
+
- V
-
)
13.5V
Voltage at Input/Output pins
V
+
+0.8V, V
-
-0.8V
Input Current
10mA
Storage Temperature Range
-65C to +150C
Junction Temperature (Note 4)
+150C
Soldering Information
Infrared or Convection Reflow(20 sec)
235C
Wave Soldering Lead Temp.(10 sec)
260C
Operating Ratings
(Note 1)
Supply Voltage (V
+
V
-
)
3V to 12.8V
Junction Temperature Range (Note 4)
-40C to +85C
Package Thermal Resistance (Note 4) (
JA
)
SOT23-5
265C/W
SOIC-8
190C/W
MSOP-8
235C/W
SOIC-14
145C/W
TSSOP-14
155C/W
3V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for at T
J
= 25C, V
+
= 3V, V
-
= 0V, V
CM
= V
O
= V
+
/2, and R
L
= 2k
to V
+
/2.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
BW
-3dB BW
A
V
= +1, V
OUT
= 200mV
PP
80
115
MHz
A
V
= +2, -1, V
OUT
= 200mV
PP
46
BW
0.1dB
0.1dB Gain Flatness
A
V
= +2, R
L
= 150
to V+/2,
R
L
= 402
, V
OUT
= 200mV
PP
19
MHz
PBW
Full Power Bandwidth
A
V
= +1, -1dB, V
OUT
= 1V
PP
40
MHz
e
n
Input-Referred Voltage Noise
f = 100kHz
17
nV/
f = 1kHz
48
i
n
Input-Referred Current Noise
f = 100kHz
0.90
pA/
f = 1kHz
3.3
THD
Total Harmonic Distortion
f = 5MHz, V
O
= 2V
PP
, A
V
= -1,
R
L
= 100
to V
+
/2
-48
dBc
DG
Differential Gain
V
CM
= 1V, NTSC, A
V
= +2
R
L
=150
to V
+
/2
0.17
%
R
L
=1k
to V
+
/2
0.03
DP
Differential Phase
V
CM
= 1V, NTSC, A
V
= +2
R
L
=150
to V
+
/2
0.05
deg
R
L
=1k
to V
+
/2
0.03
CT Rej.
Cross-Talk Rejection
f = 5MHz, Receiver:
R
f
= R
g
= 510
, A
V
= +2
47
dB
T
S
Settling Time
V
O
= 2V
PP
,
0.1%, 8pF Load,
V
S
= 5V
68
ns
SR
Slew Rate (Note 8)
A
V
= -1, V
I
= 2V
PP
90
120
V/s
V
OS
Input Offset Voltage
1
5
7
mV
TC V
OS
Input Offset Average Drift
(Note 12)
5
V/C
I
B
Input Bias Current
(Note 7)
-1.50
-2.60
-3.25
A
I
OS
Input Offset Current
20
800
1000
nA
R
IN
Common Mode Input
Resistance
3
M
C
IN
Common Mode Input
Capacitance
2
pF
LMH6642/6643/6644
www.national.com
2
3V Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for at T
J
= 25C, V
+
= 3V, V
-
= 0V, V
CM
= V
O
= V
+
/2, and R
L
= 2k
to V
+
/2.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
CMVR
Input Common-Mode Voltage
Range
CMRR
50dB
-0.5
-0.2
-0.1
V
1.8
1.6
2.0
CMRR
Common Mode Rejection
Ratio
V
CM
Stepped from 0V to 1.5V
72
95
dB
A
VOL
Large Signal Voltage Gain
V
O
= 0.5V to 2.5V
R
L
= 2k
to V
+
/2
80
75
96
dB
V
O
= 0.5V to 2.5V
R
L
= 150
to V
+
/2
74
70
82
V
O
Output Swing
High
R
L
= 2k
to V
+
/2, V
ID
= 200mV
2.90
2.98
V
R
L
= 150
to V
+
/2, V
ID
= 200mV
2.80
2.93
Output Swing
Low
R
L
= 2k
to V
+
/2, V
ID
= -200mV
25
75
mV
R
L
= 150
to V
+
/2, V
ID
= -200mV
75
150
I
SC
Output Short Circuit Current
Sourcing to V
+
/2
V
ID
= 200mV (Note 10)
50
35
95
mA
Sinking to V
+
/2
V
ID
= -200mV (Note 10)
55
40
110
I
OUT
Output Current
V
OUT
= 0.5V from either supply
65
mA
+PSRR
Positive Power Supply
Rejection Ratio
V
+
= 3.0V to 3.5V, V
CM
= 1.5V
75
85
dB
I
S
Supply Current (per channel)
No Load
2.70
4.00
4.50
mA
5V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for at T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= V
O
= V
+
/2, and R
L
= 2k
to V
+
/2.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
BW
-3dB BW
A
V
= +1, V
OUT
= 200mV
PP
90
120
MHz
A
V
= +2, -1, V
OUT
= 200mV
PP
46
BW
0.1dB
0.1dB Gain Flatness
A
V
= +2, R
L
= 150
to V+/2,
R
f
= 402
, V
OUT
= 200mV
PP
15
MHz
PBW
Full Power Bandwidth
A
V
= +1, -1dB, V
OUT
= 2V
PP
22
MHz
e
n
Input-Referred Voltage Noise
f = 100kHz
17
nV/
f = 1kHz
48
i
n
Input-Referred Current Noise
f = 100kHz
0.90
pA/
f = 1kHz
3.3
THD
Total Harmonic Distortion
f = 5MHz, V
O
= 2V
PP
, A
V
= +2
-60
dBc
DG
Differential Gain
NTSC, A
V
= +2
R
L
=150
to V
+
/2
0.16
%
R
L
=1k
to V
+
/2
0.05
DP
Differential Phase
NTSC, A
V
= +2
R
L
=150
to V
+
/2
0.05
deg
R
L
=1k
to V
+
/2
0.01
CT Rej.
Cross-Talk Rejection
f = 5MHz, Receiver:
R
f
= R
g
= 510
, A
V
= +2
47
dB
T
S
Settling Time
V
O
= 2V
PP
,
0.1%, 8pF Load
68
ns
LMH6642/6643/6644
www.national.com
3
5V Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for at T
J
= 25C, V
+
= 5V, V
-
= 0V, V
CM
= V
O
= V
+
/2, and R
L
= 2k
to V
+
/2.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
SR
Slew Rate (Note 8)
A
V
= -1, V
I
= 2V
PP
95
125
V/s
V
OS
Input Offset Voltage
1
5
7
mV
TC V
OS
Input Offset Average Drift
(Note 12)
5
V/C
I
B
Input Bias Current
(Note 7)
-1.70
-2.60
-3.25
A
I
OS
Input Offset Current
20
800
1000
nA
R
IN
Common Mode Input
Resistance
3
M
C
IN
Common Mode Input
Capacitance
2
pF
CMVR
Input Common-Mode Voltage
Range
CMRR
50dB
-0.5
-0.2
-0.1
V
3.8
3.6
4.0
CMRR
Common Mode Rejection
Ratio
V
CM
Stepped from 0V to 3.5V
72
95
dB
A
VOL
Large Signal Voltage Gain
V
O
= 0.5V to 4.50V
R
L
= 2k
to V
+
/2
86
82
98
dB
V
O
= 0.5V to 4.25V
R
L
= 150
to V
+
/2
76
72
82
V
O
Output Swing
High
R
L
= 2k
to V
+
/2, V
ID
= 200mV
4.90
4.98
V
R
L
= 150
to V
+
/2, V
ID
= 200mV
4.65
4.90
Output Swing
Low
R
L
= 2k
to V
+
/2, V
ID
= -200mV
25
100
mV
R
L
= 150
to V
+
/2, V
ID
= -200mV
100
150
I
SC
Output Short Circuit Current
Sourcing to V
+
/2
V
ID
= 200mV (Note 10)
55
40
115
mA
Sinking to V
+
/2
V
ID
= -200mV (Note 10)
70
55
140
I
OUT
Output Current
V
O
= 0.5V from either supply
70
mA
+PSRR
Positive Power Supply
Rejection Ratio
V
+
= 4.0V to 6V
79
90
dB
I
S
Supply Current (per channel)
No Load
2.70
4.25
5.00
mA
5V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for at T
J
= 25C, V
+
= 5V, V
-
= -5V, V
CM
= V
O
= 0V and R
L
= 2k
to ground.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
BW
-3dB BW
A
V
= +1, V
OUT
= 200mV
PP
95
130
MHz
A
V
= +2, -1, V
OUT
= 200mV
PP
46
BW
0.1dB
0.1dB Gain Flatness
A
V
= +2, R
L
= 150
to V+/2,
R
f
= 806
, V
OUT
= 200mV
PP
12
MHz
PBW
Full Power Bandwidth
A
V
= +1, -1dB, V
OUT
= 2V
PP
24
MHz
e
n
Input-Referred Voltage Noise
f = 100kHz
17
nV/
f = 1kHz
48
LMH6642/6643/6644
www.national.com
4
5V Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for at T
J
= 25C, V
+
= 5V, V
-
= -5V, V
CM
= V
O
= 0V and R
L
= 2k
to ground.
Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
i
n
Input-Referred Current Noise
f = 100kHz
0.90
pA/
f = 1kHz
3.3
THD
Total Harmonic Distortion
f = 5MHz, V
O
= 2V
PP
, A
V
= +2
-62
dBc
DG
Differential Gain
NTSC, A
V
= +2
R
L
=150
to V
+
/2
0.15
%
R
L
=1k
to V
+
/2
0.01
DP
Differential Phase
NTSC, A
V
= +2
R
L
=150
to V
+
/2
0.04
deg
R
L
=1k
to V
+
/2
0.01
CT Rej.
Cross-Talk Rejection
f = 5MHz, Receiver:
R
f
= R
g
= 510
, A
V
= +2
47
dB
T
S
Settling Time
V
O
= 2V
PP
,
0.1%, 8pF Load,
V
S
= 5V
68
ns
SR
Slew Rate (Note 8)
A
V
= -1, V
I
= 2V
PP
100
135
V/s
V
OS
Input Offset Voltage
1
5
7
mV
TC V
OS
Input Offset Average Drift
(Note 12)
5
V/C
I
B
Input Bias Current
(Note 7)
-1.60
-2.60
-3.25
A
I
OS
Input Offset Current
20
800
1000
nA
R
IN
Common Mode Input
Resistance
3
M
C
IN
Common Mode Input
Capacitance
2
pF
CMVR
Input Common-Mode Voltage
Range
CMRR
50dB
-5.5
-5.2
-5.1
V
3.8
3.6
4.0
CMRR
Common Mode Rejection
Ratio
V
CM
Stepped from -5V to 3.5V
74
95
dB
A
VOL
Large Signal Voltage Gain
V
O
= -4.5V to 4.5V,
R
L
= 2k
88
84
96
dB
V
O
= -4.0V to 4.0V,
R
L
= 150
78
74
82
V
O
Output Swing
High
R
L
= 2k
, V
ID
= 200mV
4.90
4.96
V
R
L
= 150
, V
ID
= 200mV
4.65
4.80
Output Swing
Low
R
L
= 2k
, V
ID
= -200mV
-4.96
-4.90
V
R
L
= 150
, V
ID
= -200mV
-4.80
-4.65
I
SC
Output Short Circuit Current
Sourcing to Ground
V
ID
= 200mV (Note 10)
60
35
115
mA
Sinking to Ground
V
ID
= -200mV (Note 10)
85
65
145
I
OUT
Output Current
V
O
= 0.5V from either supply
75
mA
PSRR
Power Supply Rejection Ratio
(V
+
, V
-
) = (4.5V, -4.5V) to (5.5V,
-5.5V)
78
90
dB
I
S
Supply Current (per channel)
No Load
2.70
4.50
5.50
mA
LMH6642/6643/6644
www.national.com
5
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