Datasheet Analog Devices AD8028 — Datenblatt

Low Distortion, High Speed
Rail-to-Rail Input/Output Amplifiers
AD8027/AD8028 Data Sheet PIN CONNECTION DIAGRAM Filters
ADC drivers
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Low voltage instrumentation GENERAL DESCRIPTION
The AD8027/AD80281 are high speed amplifiers with rail-to-rail
input and output that operate on low supply voltages and are
optimized for high performance and a wide dynamic signal range.
The AD8027/AD8028 have low noise (4.3 nV/√Hz, 1.6 pA/√Hz)
and low distortion (120 dBc at 1 MHz). In applications that use a
fraction of or use 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 DISABLE/SELECT pin
(DISABLE/SELECT x in the 10-lead MSOP, hereafter referred
to as DISABLE/SELECT throughout this data sheet). This feature
controls the voltage at which the complementary transistor …

Low Distortion, High Speed
Rail-to-Rail Input/Output Amplifier
AD8028-KGD-CHIP Known Good Die
FEATURES
High speed
190 MHz, –3 dB bandwidth (G = +1)
100 V/µs slew rate
Low distortion
120 dBc @ 1 MHz SFDR
80 dBc @ 5 MHz SFDR
Selectable input crossover threshold
Low noise
4.3 nV/√Hz
1.6 pA/√Hz
Low offset voltage: 900 µV max
Low power: 6.5 mA/amplifier supply current
Disable mode
Wide supply range: 2.7 V to 12 V
Known good die (KGD): these die are fully guaranteed to
data sheet specifications 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 AD8028-KGDCHIP has a unique feature that allows the user to select the
input crossover threshold voltage through the SELECT pin. …