LMH6654/55
Single/Dual Low Power, 250 MHz, Low Noise Amplifiers
General Description
The LMH6654/55 single and dual high speed, voltage feed-
back amplifiers are designed to have unity-gain stable op-
eration with a bandwidth of 250MHz. They operate from
2.5V to
6V and each channel consumes only 4.5mA. The
amplifiers feature very low voltage noise and wide output
swing to maximize signal-to-noise ratio.
The LMH6654/55 have a true single supply capability with
input common mode voltage range extending 150 mV below
negative rail and within 1.3V of the positive rail.
LMH6654/55 high speed and low power combination make
these products an ideal choice for many portable, high
speed application where power is at a premium.
The LMH6654 is packaged in SOT23-5 and SOIC-8. The
LMH6655 is packaged in MSOP-8 and SOIC-8.
The LMH6654/55 are built on National's Advance VIP10
TM
(Vertically Integrated PNP) complementary bipolar process.
Features
(V
S
=
5V, T
J
= 25C, Typical values unless specified).
n
Voltage feedback architecture
n
Unity gain bandwidth
250MHz
n
Supply voltage range
2.5V to
6V
n
Slew rate
200V/sec
n
Supply current
4.5mA/channel
n
Input common mode voltage
-5.15V to +3.7V
n
Output voltage swing (R
L
= 100
)
-3.6V to 3.4V
n
Input voltage noise
4.5nV/
n
Input current noise
1.7pA/
n
Settling Time to 0.01%
25ns
Applications
n
ADC drivers
n
Consumer video
n
Active filters
n
Pulse delay circuits
n
xDSL receiver
n
Pre-amps
Typical Performance Characteristics
Input Voltage Noise vs. Frequency
Closed Loop Gain vs. Frequency
20016560
20016558
August 2001
LMH6654/55
Single/Dual
Low
Power
,
250
MHz,
Low
Noise
Amplifiers
2001 National Semiconductor Corporation
DS200165
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 2)
Human Body Model
2kV
Machine Model
200V
V
IN
Differential
1.2V
Output Short Circuit Duration
(Note 3)
Supply Voltage (V
+
- V
-
)
13.2V
Voltage at Input pins
V
+
+0.5V, V
-
-0.5V
Storage Temperature Range
-65C to +150C
Junction Temperature (Note 4)
+150C
Soldering Information
Infrared or Convection (20 sec.)
235C
Wave Soldering (10 sec.)
260C
Operating Ratings
(Note 1)
Supply Voltage (V
+
- V
-
)
2.5V to
6.0V
Junction Temperature Range
-40C to +85C
Thermal Resistance (
JA
)
8-Pin SOIC
172C/W
8-Pin MSOP
235C/W
5-Pin SOT-23
265C/W
5V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= +5V, V
-
= -5V, V
CM
= 0V, A
V
= +1, R
F
= 25
for gain =
+1, R
F
= 402
for gain =
+2, and R
L
= 100
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
Dynamic Performance
f
CL
Close Loop Bandwidth
A
V
= +1
250
MHz
A
V
= +2
130
A
V
= +5
52
A
V
= +10
26
GBWP
Gain Bandwidth Product
A
V
+5
260
MHz
Bandwidth for 0.1dB Flatness
A
V
+1
18
MHz
m
Phase Margin
50
deg
SR
Slew Rate (Note 8)
A
V
= +1, V
IN
= 2V
PP
200
V/s
T
S
Settling Time
0.01%
A
V
= +1, 2V Step
25
ns
0.1%
15
ns
t
r
Rise Time
A
V
= +1, 0.2V Step
1.4
ns
t
f
Fall Time
A
V
= +1, 0.2V Step
1.2
ns
Distortion and Noise Response
e
n
Input Referred Voltage Noise
f
0.1 MHz
4.5
nV/
i
n
Input-Referred Current Noise
f
0.1 MHz
1.7
pA/
Second Harmonic Distortion
A
V
= +1, f = 5MHz
-80
dBc
Third Harmonic Distortion
V
O
= 2V
PP
, R
L
= 100
-85
X
t
Crosstalk (for LMH6655 only)
Input Referred, 5MHz,
Channel-to-Channel
-80
dB
DG
Differential Gain
A
V
= +2, NTSC, R
L
= 150
0.01
%
DP
Differential Phase
A
V
= +2, NTSC, R
L
= 150
0.025
deg
Input Characteristics
V
OS
Input Offset Voltage
V
CM
= 0V
-3
-4
1
3
4
mV
TC V
OS
Input Offset Average Drift
V
CM
= 0V (Note 7)
6
V/C
I
B
Input Bias Current
V
CM
= 0V
5
12
18
A
I
OS
Input Offset Current
V
CM
= 0V
-1
-2
0.3
1
2
A
R
IN
Input Resistance
Common- Mode
4
M
Differential Mode
20
k
LMH6654/55
www.national.com
2
5V Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= +5V, V
-
= -5V, V
CM
= 0V, A
V
= +1, R
F
= 25
for gain =
+1, R
F
= 402
for gain =
+2, and R
L
= 100
. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
C
IN
Input Capacitance
Common- Mode
1.8
pF
Differential Mode
1
CMRR
Common Mode Rejection Ration
Input Referred,
V
CM
= 0V to -5V
70
68
90
dB
CMVR
Input Common- Mode Voltage Range
CMRR
50dB
-5.15
-5.0
V
3.5
3.7
Transfer Characteristics
A
VOL
Large Signal Voltage Gain
V
O
= 4V
PP
, R
L
= 100
60
58
67
dB
Output Characteristics
V
O
Output Swing High
No Load
3.4
3.2
3.6
V
Output Swing Low
No Load
-3.9
-3.7
-3.5
Output Swing High
R
L
= 100
3.2
3.0
3.4
Output Swing Low
R
L
= 100
-3.6
-3.4
-3.2
I
SC
Short Circuit Current (Note 3)
Sourcing, V
O
= 0V
V
IN
= 200mV
145
130
280
mA
Sinking, V
O
= 0V
V
IN
= 200mV
100
80
185
I
OUT
Output Current
Sourcing, V
O
= +3V
80
mA
Sinking, V
O
= -3V
120
R
O
Output Resistance
A
V
= +1, f
<
100kHz
0.08
Power Supply
PSRR
Power Supply Rejection Ratio
Input Referred ,
V
S
=
5V to
6V
60
76
dB
I
S
Supply Current (per channel)
4.5
6
7
mA
5V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= +5V, V
-
= -0V, V
CM
= 2.5V, A
V
= +1, R
F
= 25
for gain
= +1, R
F
= 402
for gain =
+2, and R
L
= 100
to V+/2. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
Dynamic Performance
f
CL
Close Loop Bandwidth
A
V
= +1
230
MHz
A
V
= +2
120
A
V
= +5
50
A
V
= +10
25
GBWP
Gain Bandwidth Product
A
V
+5
250
MHz
Bandwidth for 0.1dB Flatness
A
V
= +1
17
MHz
m
Phase Margin
48
deg
SR
Slew Rate (Note 8)
A
V
= +1, V
IN
= 2V
PP
190
V/s
T
S
Settling Time
0.01%
A
V
= +1, 2V Step
30
ns
0.1%
20
ns
LMH6654/55
www.national.com
3
5V Electrical Characteristics
(Continued)
Unless otherwise specified, all limits guaranteed for T
J
= 25C, V
+
= +5V, V
-
= -0V, V
CM
= 2.5V, A
V
= +1, R
F
= 25
for gain
= +1, R
F
= 402
for gain =
+2, and R
L
= 100
to V+/2. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Conditions
Min
(Note 6)
Typ
(Note 5)
Max
(Note 6)
Units
t
r
Rise Time
A
V
= +1, 0.2V Step
1.5
ns
t
f
Fall Time
A
V
= +1, 0.2V Step
1.35
ns
Distortion and Noise Response
e
n
Input Referred Voltage Noise
f
0.1MHz
4.5
nV/
i
n
Input Referred Current Noise
f
0.1 MHz
1.7
pA/
Second Harmonic Distortion
A
V
= +1, f = 5MHz
-65
dBc
Third Harmonic Distortion
V
O
= 2V
PP
, R
L
= 100
-70
X
t
Crosstalk (for LMH6655 only)
Input Referred, 5MHz
-78
dB
Input Characteristics
V
OS
Input Offset Voltage
V
CM
= 2.5V
-5
-6.5
2
5
6.5
mV
TC V
OS
Input Offset Average Drift
V
CM
= 2.5V (Note 7)
6
V/C
I
B
Input Bias Current
V
CM
= 2.5V
6
12
18
A
I
OS
Input Offset Current
V
CM
= 2.5V
-2
-3
0.5
2
3
A
R
IN
Input Resistance
Common- Mode
4
M
Differential Mode
20
k
C
IN
Input Capacitance
Common- Mode
1.8
pF
Differential Mode
1
CMRR
Common Mode Rejection Ration
Input Referred,
V
CM
= 0V to -2.5V
70
68
90
dB
CMVR
Input Common Mode Voltage Range
CMRR
50dB
-0.15
0
V
3.5
3.7
Transfer Characteristics
A
VOL
Large Signal Voltage Gain
V
O
= 1.6V
PP
, R
L
= 100
58
55
64
dB
Output Characteristics
V
O
Output Swing High
No Load
3.6
3.4
3.75
V
Output Swing Low
No Load
0.9
1.1
1.3
Output Swing High
R
L
= 100
3.5
3.35
3.70
Output Swing Low
R
L
= 100
1
1.3
1.45
I
SC
Short Circuit Current (Note 3)
Sourcing , V
O
= 2.5V
V
IN
= 200mV
90
80
170
mA
Sinking, V
O
= 2.5V
V
IN
= 200mV
70
60
140
I
OUT
Output Current
Sourcing, V
O
= +3.5V
30
mA
Sinking, V
O
= 1.5V
60
R
O
Output Resistance
A
V
= +1, f
<
100kHz
.08
Power Supply
PSRR
Power Supply Rejection Ratio
Input Referred ,
V
S
=
2.5V to
3V
60
75
dB
I
S
Supply Current (per channel)
4.5
6
7
mA
LMH6654/55
www.national.com
4
5V Electrical Characteristics
(Continued)
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 and the test conditions, see the Electrical Characteristics Table.
Note 2: Human body model, 1.5k
in series with 100pF. Machine model: 0
in series with 100pF.
Note 3: Continuous short circuit operation at elevated ambient temperature can result in exceeding the maximum allowed junction temperature at 150C.
Note 4: The maximum power dissipation is a function of T
J(MAX)
,
JA
and T
A
. The maximum allowable power dissipation at any ambient temperature is P
D
=
(T
J(MAX)
- T
A
)/
JA
. All numbers apply for packages soldered directly onto a PC board.
Note 5: Typical Values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: Offset voltage average drift is determined by dividing the change in V
OS
at temperature extremes into the total temperature change.
Note 8: Slew rate is the slower of the rising and falling slew rates. Slew rate is rate of change from 10% to 90% of output voltage step.
Typical Performance Characteristics
T
J
= 25C, V
+
=
5V, V
-
= -5, R
F
= 25
for gain = +1, R
F
=
402
and for gain
+2, and R
L
= 100
, unless otherwise specified.
Closed Loop Bandwidth (G = +1)
Closed Loop Bandwidth (G = +2)
20016509
20016510
Closed Loop Bandwidth (G = +5)
Closed Loop Bandwidth (G = +10)
20016511
20016512
LMH6654/55
www.national.com
5
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