鈥?/div>
+
9
8
7
6
V
OUTB
鈥揑N B
+IN B
DISABLE/SELECT B
Figure 1. Connection Diagrams (Top View)
APPLICATIONS
Filters
ADC drivers
Level shifting
Buffering
Professional video
Low voltage instrumentation
With their wide supply voltage range (2.7 V to 12 V) and wide
bandwidth (190 MHz), the AD8027/AD8028 amplifiers are
designed to work in a variety of applications where speed and
performance are needed on low supply voltages. The high per-
formance of the AD8027/AD8028 is achieved with a quiescent
current of only 6.5 mA/amplifier typical. The AD8027/AD8028
have a shutdown mode that is controlled via the SELECT pin.
The AD8027/AD8028 are available in SOIC-8, MSOP-10, and
SOT-23-6 packages. They are rated to work over the industrial
temperature range of 鈥?0掳C to +125掳C.
鈥?0
G = +1
FREQUENCY = 100kHz
R
L
= 1k惟
GENERAL DESCRIPTION
The AD8027/AD8028
1
are high speed amplifiers with rail-to-
rail input and output that operate on low supply voltages and
are optimized for high performance and wide dynamic signal
range. The AD8027/AD8028 have low noise (4.3 nV/鈭欻z,
1.6 pA/鈭欻z) and low distortion (120 dBc at 1 MHz). In appli-
cations that use a fraction of, or the entire input dynamic range
and require low distortion, the AD8027/AD8028 are ideal
choices.
Many rail-to-rail input amplifiers have an input stage that
switches from one differential pair to another as the input signal
crosses a threshold voltage, which causes distortion. The
AD8027/AD8028 have a unique feature that allows the user to
select the input crossover threshold voltage through the
SELECT pin. This feature controls the voltage at which the
complementary transistor input pairs switch. The AD8027/
AD8028 also have intrinsically low crossover distortion.
鈥?0
鈥?0
V
S
= +3V
SFDR (dB)
V
S
= +5V
V
S
=
卤5V
鈥?0
鈥?00
鈥?20
鈥?40
0
1
2
3
4
5
6
7
OUTPUT VOLTAGE (V p-p)
8
9
10
03327-A-063
Figure 2. SFDR vs. Output Amplitude
1
Protected by U.S. patent numbers 6,486,737B1; 6,518,842B1
Rev. C
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However, no responsibility is assumed by Analog Devices for its use, nor for any
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