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LMH6658MAX/NOPB 应用笔记 - TI

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LMH6658MAX/NOPB 应用笔记

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LMH6657/LMH6658
270MHz Single Supply, Single & Dual Amplifiers
General Description
The LMH6657/6658 are low-cost operational amplifiers that
operate from a single supply with input voltage range ex-
tending below the V
. Based on easy to use voltage feed-
back topology and boasting fast slew rate (700V/µs) and
high speed (140MHz GBWP), the LMH6657 (Single) and
LMH6658 (dual) can be used in high speed large signal
applications. These applications include instrumentation,
communication devices, set-top boxes, etc.
With a -3dB BW of 100MHz (A
V
= +2) and DG & DP of 0.03%
& 0.10˚ respectively, the LMH6657/6658 are well suited for
video applications. The output stage can typically supply
80mA into the load with a swing of about 1V from either rail.
For Industrial applications, the LMH6657/6658 are excellent
cost-saving choices. Input referred voltage noise is low and
the input voltage can extend below V
to ease amplification
of low level signals that could be at or near the system
ground. With low distortion and fast settling, LMH6657/6658
can provide buffering for A/D and D/A applications.
The LMH6657/6658 versatility and ease of use is extended
even further by offering these high slew rate , high speed Op
Amps in miniature packages such as SOT23-5, SC70,
SOIC-8, and MSOP-8. Refer to the Ordering Information
section for packaging options available for each device.
Features
V
S
=5V,T
A
= 25˚C, R
L
= 100 (Typical values unless
specified)
n −3dB BW (A
V
= +1) 270MHz
n Supply voltage range 3V to 12V
n Slew rate, (V
S
=
±
5V) 700V/µs
n Supply current 6.2mA/amp
n Output current +80/−90mA
n Input common mode volt. 0.5V beyond V
, 1.7V from V
+
n Output voltage swing (R
L
=2k) 0.8V from rails
n Input voltage noise 11nV/
n Input current noise 2.1pA/
n DG error 0.03%
n DP error 0.10˚
n THD (5MHz) −55dBc
n Settling time (0.1%) 37ns
n Fully characterized for 5V, and
±
5V
n Output overdrive recovery 18ns
n Output short circuit protected (Note 10)
n No output phase reversal with CMVR exceeded
Applications
n CD/DVD ROM
n ADC buffer amp
n Portable video
n Current sense buffer
n Portable communications
Connection Diagrams
SOT23-5/SC70-5 (LMH6657) SOIC-8/MSOP-8 (LMH6658)
20053261
Top View
20053263
October 2004
LMH6657/LMH6658 270MHz Single Supply, Single & Dual Amplifiers
© 2004 National Semiconductor Corporation DS200532 www.national.com
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