National Semiconductor LMH6551 Technical data
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LMH6551
Differential, High Speed Op Amp
LMH6551 Differential, High Speed Op Amp
February 2005
General Description
The LMH™6551 is a high performance voltage feedback
differential amplifier. The LMH6551 has the high speed and
low distortion necessary for driving high performance ADCs
as well as the current handling capability to drive signals
over balanced transmission lines like CAT 5 data cables. The
LMH6551 can handle a wide range of video and data formats.
With external gain set resistors, the LMH6551 can be used
at any desired gain. Gain flexibility coupled with high speed
makes the LMH6551 suitable for use as an IF amplifier in
high performance communications equipment.
The LMH6551 is available in the space saving SOIC and
MSOP packages.
Typical Application
Features
n 370 MHz −3 dB bandwidth (V
n 50 MHz 0.1 dB bandwidth
n 2400 V/µs slew Rate
n 18 ns settling time to 0.05%
n −94/−96 dB HD2/HD3
@
OUT
5 MHz
Applications
n Differential AD driver
n Video over twisted pair
n Differential line driver
n Single end to differential converter
n High speed differential signaling
n IF/RF amplifier
n SAW filter buffer/driver
= 0.5 VPP)
Single Ended Input Differential Output.
Gain = A
LMH™is a trademark of National Semiconductor Corporation.
© 2005 National Semiconductor Corporation DS201332 www.national.com
Where VINis measured single ended and V
V=RF/RG
is measured differentially. (Each individual output will equal±VIN/2.)
OUT
20133210
Connection Diagram
LMH6551
Ordering Information
Package Part Number Package Marking Transport Media NSC Drawing
8-Pin SOIC
8–Pin MSOP
8-Pin SOIC & MSOP
Top View
LMH6551MA
LMH6551MAX 2.5k Units Tape and Reel
LMH6551MM
LMH6551MMX 3.5k Units Tape and Reel
LMH6551MA
AU1A
20133208
95/Rails
1k Units Tape and Reel
M08A
MUA08A
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LMH6551
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 5)
Soldering Information
Infrared or Convection (20 sec) 235˚C
Wave Soldering (10 sec) 260˚C
Operating Ratings (Note 1)
Human Body Model 2000V
Machine Model 200V
Supply Voltage 13.2V
Common Mode Input Voltage
Maximum Input Current (pins 1, 2,
7, 8) 30mA
Maximum Output Current (pins 4, 5) (Note 3)
±
5V Electrical Characteristics (Note 2)
±
Vs
Operating Temperature Range −40˚C to +125˚C
Storage Temperature Range −65˚C to +150˚C
Total Supply Voltage 3V to 12V
Package Thermal Resistance (θ
) (Note 4)
JA
8-Pin MSOP 235˚C/W
8-Pin SOIC 150˚C/W
Single ended in differential out, TA= 25˚C, G = +1, VS=±5V, VCM= 0V, RF=RG= 365Ω,RL= 500Ω;; Unless specified Bold-
face limits apply at the temperature extremes.
Symbol Parameter Conditions Min
(Note 8)
Typ
(Note 7)
Max
(Note 8)
Units
AC Performance (Differential)
SSBW Small Signal −3 dB Bandwidth V
LSBW Large Signal −3 dB Bandwidth V
Large Signal −3 dB Bandwidth V
0.1 dB Bandwidth V
OUT
OUT
OUT
OUT
= 0.5 V
=2V
=4V
=2V
PP
PP
PP
PP
370 MHz
340 MHz
320 MHz
50 MHz
Slew Rate 4V Step(Note 6) 2400 V/µs
Rise/Fall Time 2V Step 1.8 ns
Settling Time 2V Step, 0.05% 18 ns
V
Pin AC Performance (Common Mode Feedback Amplifier)
CM
Common Mode Small Signal
V
bypass capacitor removed 200 MHz
CM
Bandwidth
Distortion and Noise Response
HD2 V
HD2 V
HD3 V
HD3 V
e
n
i
n
Input Referred Voltage Noise Freq ≥ 1 MHz 6.0 nV/
Input Referred Noise Current Freq ≥ 1 MHz 1.5 pA/
=2VPP,f=5MHz, RL=800Ω −94 dBc
O
=2VPP, f = 20MHz, RL=800Ω −85 dBc
O
=2VPP,f=5MHz, RL=800Ω −96 dBc
O
=2VPP,f=20MHz, RL=800Ω −72 dBc
O
Input Characteristics (Differential)
V
OSD
Input Offset Voltage Differential Mode, VID=0,VCM= 0 0.5
Input Offset Voltage Average
(Note 10) −0.8 µV/˚C
±
4
±
6
Temperature Drift
I
BI
Input Bias Current (Note 9) -4 0
-10
Input Bias Current Average
(Note 10) −2.6 nA/˚C
Temperature Drift
Input Bias Difference Difference in Bias currents
0.03 µA
between the two inputs
CMRR Common Mode Rejection Ratio DC, V
R
IN
C
IN
CMVR Input Common Mode Voltage
Input Resistance Differential 5 MΩ
Input Capacitance Differential 1 pF
CMRR
Range
= 0V, VID= 0V 72 80 dBc
CM
>
53dB +3.1
−4.6
+3.2
−4.7
VCMPin Input Characteristics (Common Mode Feedback Amplifier)
mV
µA
V
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±
5V Electrical Characteristics (Note 2) (Continued)
Single ended in differential out, TA= 25˚C, G = +1, VS=±5V, VCM= 0V, RF=RG= 365Ω,RL= 500Ω;; Unless specified Boldface limits apply at the temperature extremes.
LMH6551
Symbol Parameter Conditions Min
(Note 8)
V
OSC
Input Offset Voltage Common Mode, VID= 0 0.5
Input Offset Voltage Average
(Note 10) 8.2 µV/˚C
Typ
(Note 7)
Max
(Note 8)
±
5
±
8
Temperature Drift
Input Bias Current (Note 9) −2 µA
V
CMRR VID= 0V, 1V step on VCMpin,
CM
measure V
OD
70 75 dB
Input Resistance 25 kΩ
Common Mode Gain ∆V
O,CM
/∆V
CM
0.995 0.999 1.005 V/V
Output Performance
Output Voltage Swing Single Ended, Peak to Peak
Output Common Mode Voltage
V
ID
=0V,
±
±
±
7.38
7.18
3.69
±
7.8 V
±
3.8 V
Range
I
I
OUT
SC
Linear Output Current V
OUT
=0V
Short Circuit Current Output Shorted to Ground
= 3V Single Ended(Note 3)l
V
IN
Output Balance Error ∆V
Common Mode
OUT
/∆V
OUT
DIfferential , V
OUT
= 0.5
±
50
±
65 mA
140 mA
−70 dB
Vpp Differential,f=10MHz
Miscellaneous Performance
A
VOL
PSRR Power Supply Rejection Ratio DC, ∆V
Open Loop Gain Differential 70 dB
=±1V 74 90 dB
S
Supply Current R
∞
=
L
11 12.5 14.5
16.5
Units
mV
mA
5V Electrical Characteristics (Note 2)
Single ended in differential out, TA= 25˚C, G = +1, VS= 5V, VCM= 2.5V, RF=RG= 365Ω,RL= 500Ω; ; Unless specifiedBoldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min
(Note 8)
SSBW Small Signal −3 dB Bandwidth R
LSBW Large Signal −3 dB Bandwidth R
0.1 dB Bandwidth V
= 500Ω,V
L
= 500Ω,V
L
=2V
OUT
= 0.5 V
OUT
OUT
PP
=2V
PP
PP
Slew Rate 4V Step(Note 6) 1800 V/µs
Rise/Fall Time, 10% to 90% 4V Step 2 ns
Settling Time 4V Step, 0.05% 17 ns
V
Pin AC Performance (Common Mode Feedback Amplifier)
CM
Common Mode Small Signal
Bandwidth
Distortion and Noise Response
HD2 2
HD2 V
HD3 3
HD3 V
e
n
i
n
nd
Harmonic Distortion VO=2VPP,f=5MHz, RL=800Ω −84 dBc
=2VPP,f=20MHz, RL=800Ω −69 dBc
rd
Harmonic Distortion VO=2VPP,f=5MHz, RL=800Ω −93 dBc
O
=2VPP,f=20MHz, RL=800Ω −67 dBc
O
Input Referred Noise Voltage Freq ≥ 1 MHz 6.0 nV/
Input Referred Noise Current Freq ≥ 1 MHz 1.5 pA/
Input Characteristics (Differential)
Typ
(Note 7)
Max
(Note 8)
350 MHz
300 MHz
50 MHz
170 MHz
Units
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5V Electrical Characteristics (Note 2) (Continued)
Single ended in differential out, TA= 25˚C, G = +1, VS= 5V, VCM= 2.5V, RF=RG= 365Ω,RL= 500Ω; ; Unless specifiedBoldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min
(Note 8)
V
OSD
Input Offset Voltage Differential Mode, VID=0,VCM= 0 0.5
Input Offset Voltage Average
(Note 10) −0.8 µV/˚C
Temperature Drift
I
BIAS
Input Bias Current (Note 9) −4 0
Input Bias Current Average
(Note 10) −3 nA/˚C
Temperature Drift
Input Bias Current Difference Difference in Bias currents between
the two inputs
CMRR Common-Mode Rejection Ratio DC, V
= 0V 70 78 dBc
ID
Input Resistance Differential 5 MΩ
Input Capacitance Differential 1 pF
V
ICM
Input Common Mode Range CMRR>53 dB +3.1
VCMPin Input Characteristics (Common Mode Feedback Amplifier)
Input Offset Voltage Common Mode, V
= 0 0.5
ID
Input Offset Voltage Average
Temperature Drift
Input Bias Current 3µA
V
CMRR VID=0,
CM
1V step on V
Input Resistance V
Common Mode Gain ∆V
pin to ground 25 kΩ
CM
/∆V
O,CM
pin, measure V
CM
CM
OD
0.995 0.991 1.005 V/V
Output Performance
V
OUT
I
OUT
I
SC
CMVR Output Common Mode Voltage
Output Voltage Swing Single Ended, Peak to Peak, VS=
±
2.5V, VCM=0V
Linear Output Current V
= 0V Differential
OUT
Output Short Circuit Current Output Shorted to Ground
= 3V Single Ended(Note 3)
V
IN
V
=0,VCMpin = 1.2V and 3.8V 3.72
ID
Range
Output Balance Error ∆V
/∆V
OUT
OUT
Common Mode
DIfferential , V
OUT
= 1Vpp
Differential,f=10MHz
Miscellaneous Performance
Open Loop Gain DC, Differential 70 dB
PSRR Power Supply Rejection Ratio DC, ∆V
I
S
Supply Current RL=
=±0.5V 72 88 dB
S
∞
+0.4
70 75 dB
±
2.4
±
45
1.23
10 11.5 13.5
Typ
(Note 7)
Max
(Note 8)
±
4
±
6
-10
0.03 µA
+3.2
+0.3
±
5
±
8
5.8 µV/˚C
±
2.8 V
±
60 mA
230 mA
3.8
1.2
−65 dB
15.5
Units
mV
mV
mA
LMH6551
µA
V
3.3V Electrical Characteristics (Note 2)
Single ended in differential out, TA= 25˚C, G = +1, VS= 3.3V, VCM= 1.65V, RF=RG= 365Ω,RL= 500Ω; ; Unless specified-
Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min
(Note 8)
SSBW Small Signal −3 dB Bandwidth R
= 500Ω,V
L
OUT
= 0.5 V
PP
Typ
(Note 7)
Max
(Note 8)
320 MHz
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Units
3.3V Electrical Characteristics (Note 2) (Continued)
Single ended in differential out, TA= 25˚C, G = +1, VS= 3.3V, VCM= 1.65V, RF=RG= 365Ω,RL= 500Ω; ; Unless specified-
Boldface limits apply at the temperature extremes.
LMH6551
Symbol Parameter Conditions Min
(Note 8)
LSBW Large Signal −3 dB Bandwidth R
= 500Ω,V
L
OUT
=1V
PP
Slew Rate 1V Step(Note 6) 700 V/µs
Rise/Fall Time, 10% to 90% 1V Step 2 ns
V
Pin AC Performance (Common Mode Feedback Amplifier)
CM
Common Mode Small Signal
Bandwidth
Distortion and Noise Response
HD2 2
HD2 V
HD3 3
HD3 V
nd
Harmonic Distortion VO=1VPP,f=5MHz, RL=800Ω −93 dBc
=1VPP,f=20MHz, RL=800Ω −74 dBc
rd
Harmonic Distortion VO=1VPP,f=5MHz, RL=800Ω −85 dBc
O
=1VPP,f=20MHz, RL=800Ω −69 dBc
O
Input Characteristics (Differential)
V
OSD
Input Offset Voltage Differential Mode, VID=0,VCM=0 1 mV
Input Offset Voltage Average
(Note 10) 1.6 µV/˚C
Temperature Drift
I
BIAS
Input Bias Current (Note 9) −8 µA
Input Bias Current Average
(Note 10) 9.5 nA/˚C
Temperature Drift
Input Bias Current Difference Difference in Bias currents between
the two inputs
CMRR Common-Mode Rejection Ratio DC, V
= 0V 78 dBc
ID
Input Resistance Differential 5 MΩ
Input Capacitance Differential 1 pF
V
ICM
Pin Input Characteristics (Common Mode Feedback Amplifier)
V
CM
Input Common Mode Range CMRR>53 dB +1.5
Input Offset Voltage Common Mode, V
=0 1
ID
Input Offset Voltage Average
Temperature Drift
Input Bias Current 3µA
V
CMRR VID=0,
CM
1V step on V
pin, measure V
CM
OD
Input Resistance VCMpin to ground 25 kΩ
Common Mode Gain ∆V
O,CM
/∆V
CM
Output Performance
V
I
OUT
I
SC
OUT
Output Voltage Swing Single Ended, Peak to Peak, VS=
Linear Output Current V
Output Short Circuit Current Output Shorted to Ground
CMVR Output Common Mode Voltage
3.3V, V
OUT
V
IN
V
ID
= 1.65V
CM
= 0V Differential
= 2V Single Ended(Note 3)
=0,VCMpin = 1.2V and 2.1V 2.1
±
Range
Output Balance Error ∆V
Common Mode
OUT
/∆V
OUT
DIfferential , V
OUT
= 1Vpp
Differential,f=10MHz
Miscellaneous Performance
Open Loop Gain DC, Differential 70 dB
PSRR Power Supply Rejection Ratio DC, ∆V
=±0.5V 75 dB
S
0.75
±
30
Typ
(Note 7)
Max
(Note 8)
300 MHz
95 MHz
0.3 µA
+0.3
±
18.6 µV/˚C
60 dB
0.999 V/V
±
0.9 V
±
40 mA
200 mA
1.2
−65 dB
Units
5mV
V
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