LMH6643MA/NOPB National Semiconductor, LMH6643MA/NOPB Datasheet - Page 18

• Manufacturer Part Number: LMH6643MA/NOPB
• Description: IC OP AMP R-R LP 3V 75MA 8-SOIC
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LMH6643MA/NOPB

• Amplifier Type: Voltage Feedback
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• Slew Rate: 135 V/µs
• -3db Bandwidth: 130MHz
• Current - Input Bias: 20nA
• Voltage - Input Offset: 1000µV
• Current - Supply: 2.7mA
• Current - Output / Channel: 75mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 12.8 V, ±1.35 V ~ 6.4 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Gain Bandwidth Product: -
• Other names: *LMH6643MA; *LMH6643MA/NOPB; LMH6643MA

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For this example, optimum C
be around 5pF. This time domain response is shown in
4
about 39MHz for f
supply is around 5mA with no load.
Ordering Information
FIGURE 4. Converter Step Response (1V
below showing about 9ns rise/fall times, corresponding to
5-Pin SOT-23
14-Pin TSSO
14-Pin SOIC
8-Pin MSOP
8-Pin SOIC
Package
p
. The overall supply current from the +5V
LMH6643MMX
LMH6642MAX
LMH6643MAX
LMH6644MAX
LMH6642MFX
LMH6644MTX
Part Number
LMH6643MM
LMH6642MF
LMH6642MA
LMH6643MA
LMH6644MA
LMH6644MT
f
was empirically determined to
20018565
PP
, 20 ns/DIV)
Package Marking
LMH6642MA
LMH6643MA
LMH6644MA
LMH6644MT
Figure
A64A
A65A
18
PRINTED CIRCUIT BOARD LAYOUT AND COMPONENT
VALUES SECTION
Generally, a good high frequency layout will keep power sup-
ply and ground traces away from the inverting input and
output pins. Parasitic capacitances on these nodes to ground
will cause frequency response peaking and possible circuit
oscillations (see Application Note OA-15 for more informa-
tion). National Semiconductor suggests the following evalua-
tion boards as a guide for high frequency layout and as an aid
in device testing and characterization:
These free evaluation boards are shipped when a device
sample request is placed with National Semiconductor.
Another important parameter in working with high speed/high
performance amplifiers, is the component values selection.
Choosing external resistors that are large in value will effect
the closed loop behavior of the stage because of the interac-
tion of these resistors with parasitic capacitances. These
capacitors could be inherent to the device or a by-product of
the board layout and component placement. Either way,
keeping the resistor values lower, will diminish this interaction
to a large extent. On the other hand, choosing very low value
resistors could load down nodes and will contribute to higher
overall power dissipation.
Device
LMH6642MF
LMH6642MA
LMH6643MA
LMH6643MM
LMH6644MA
LMH6644MT
2.5k Units Tape and Reel
2.5k Units Tape and Reel
3.5k Units Tape and Reel
2.5k Units Tape and Reel
2.5k Units Tape and Reel
1k Units Tape and Reel
3k Units Tape and Reel
1k Units Tape and Reel
Transport Media
95 Units/Rail
95 Units/Rail
94 Units/Rail
55 units/Rail
Package
5-Pin SOT-23
8-Pin SOIC
8-Pin SOIC
8-Pin MSOP
14-Pin SOIC
14-Pin TSSOP
Evaluation Board
PN
CLC730216
CLC730227
CLC730036
CLC730123
CLC730231
CLC730131
NSC Drawing
MUA08A
MF05A
MTC14
M08A
M14A