SNOS966P – MAY 2001 – REVISED MARCH 2013
LMH6642/LMH6643/LMH6644 Low Power, 130MHz, 75mA Rail-to-Rail Output Amplifiers
Check for Samples:
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FEATURES
(V
S
= ±5V, T
A
= 25°C, R
L
= 2kΩ, A
V
= +1. Typical
Values Unless Specified).
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DESCRIPTION
The LMH664X family true single supply voltage
feedback amplifiers offer high speed (130MHz), low
distortion (−62dBc), and exceptionally high output
current (approximately 75mA) at low cost and with
reduced power consumption 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 150Ω load and A
V
= +2) with minimal peaking
(typically 2dB maximum) for any gain setting 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
performance with low DG (0.01%) and DP (0.01°)
characteristics. Differential Gain and Differential
Phase characteristics are also well maintained under
heavy loads (150Ω) and throughout the output
voltage range. The LMH664X family is offered in
single (LMH6642), dual (LMH6643), and quad
(LMH6644) options.
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−3dB
BW (A
V
= +1) 130MHz
Supply Voltage Range 2.7V to 12.8V
Slew Rate
(1)
, (A
V
=
−1)
130V/µs
Supply Current (no load) 2.7mA/amp
Output Short Circuit Current +115mA/−145mA
Linear Output Current ±75mA
Input Common Mode Volt. 0.5V Beyond V
−
, 1V
from V
+
Output Voltage Swing 40mV from Rails
Input Voltage Noise (100kHz) 17nV/√Hz
Input Current Noise (100kHz) 0.9pA/√Hz
THD (5MHz, R
L
= 2kΩ, V
O
= 2V
PP
, A
V
= +2)
−62dBc
Settling Time 68ns
Fully Characterized for 3V, 5V, and ±5V
Overdrive Recovery 100ns
Output Short Circuit Protected
(2)
No Output Phase Reversal with CMVR
Exceeded
APPLICATIONS
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(1)
(2)
Active Filters
CD/DVD ROM
ADC Buffer Amp
Portable Video
Current Sense Buffer
Slew rate is the average of the rising and falling slew rates.
Output short circuit duration is infinite for V
S
< 6V at room
temperature and below. For V
S
> 6V, allowable short circuit
duration is 1.5ms.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
Copyright © 2001–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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