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LMH6647MF Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LMH6647MF
Description  2.7V, 650關A, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LMH6647MF Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LMH6645/46/47
2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output
Amplifiers with Shutdown Option
General Description
The LMH6645 (single) and LMH6646 (dual), rail-to-rail input
and output voltage feedback amplifiers, offer high speed
(55MHz), and low voltage operation (2.7V) in addition to
micro-power shutdown capability (LMH6647, single).
Input common mode voltage range exceeds either supply by
0.3V, enhancing ease of use in multitude of applications
where previously only inferior devices could be used. Output
voltage range extends to within 20mV of either supply rails,
allowing wide dynamic range especially in low voltage appli-
cations. Even with low supply current of 650µA/amplifier,
output current capability is kept at a respectable ±20mA for
driving heavier loads. Important device parameters such as
BW, Slew Rate and output current are kept relatively inde-
pendent of the operating supply voltage by a combination of
process enhancements and design architecture.
In portable applications, the LMH6647 provides shutdown
capability while keeping the turn-off current to less than
50µA. Both turn-on and turn-off characteristics are well be-
haved with minimal output fluctuations during transitions.
This allows the part to be used in power saving mode, as
well as multiplexing applications. Miniature packages
(SOT23, MSOP-8, and SO-8) are further means to ease the
adoption of these low power high speed devices in applica-
tions where board area is at a premium.
Features
(V
S = 2.7V, TA = 25˚C, RL =1kΩ to V
+/2, A
V = +1. Typical
values unless specified).
n
−3dB BW
55MHz
n
Supply voltage range
2.5V to 12V
n
Slew rate
22V/µs
n
Supply current
650µA/channel
n
Output short circuit current
42mA
n
Linear output current
±20mA
n
Input common mode voltage
0.3V beyond rails
n
Output voltage swing
20mV from rails
n
Input voltage noise
17nV/
n
Input current noise
0.75pA/
Applications
n
Active filters
n
High speed portable devices
n
Multiplexing applications (LMH6647)
n
Current sense buffer
n
High speed transducer amp
Connection Diagrams
SOT23-5 (LMH6645)
SOT23-6 (LMH6647)
SOIC-8 (LMH6645)
20020259
Top View
20020260
Top View
20020261
Top View
February 2002
© 2002 National Semiconductor Corporation
DS200202
www.national.com


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