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LMH6642 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LMH6642
Description  3V, Low Power, 130MHz, 75mA Rail-to-Rail Output Amplifiers
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LMH6642 Datasheet(HTML) 1 Page - National Semiconductor (TI)

 
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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/µs) 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
Ω 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
Ω) 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, TA = 25˚C, RL =2k
Ω,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/µs
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
Ω,V
O =2VPP,AV = +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
© 2003 National Semiconductor Corporation
DS200185
www.national.com


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