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AD8628AR-AD8628ART
Zero-Drift, Single-Supply, Rail-to-Rail Input/Output Low Noise Operational Amplifier
PRELIMINARY TECHNICAL DATA
Zero-Drift, Single-Supply,
Rail-to-Rail Input/Output
Low Noise Operational Amplifier
FEATURES
Lowest auto-zero amplifier noise
Low Offset Voltage: 5 µV
Input Offset Drift: 0.03 µV/°C
Rail-to-Rail Input and Output Swing
5 V Single-Supply Operation
High Gain, CMRR, and PSRR: 120 dB
Very Low Input Bias Current: 100 pA
Low Supply Current: 1.3 mA
Overload Recovery Time: 0.2 ms
No External Components Required
APPLICATIONS
Automotive Sensors Pressure and Position Sensors
Strain Gage Amplifiers
Medical Instrumentation
Thermocouple Amplifiers
GENERAL DESCRIPTION This new family of amplifiers has ultra-low offset, drift and bias
current. The AD8628 is a wide bandwidth auto-zero amplifier featuring rail-to-rail input and output swings and low noise.
Operation is fully specified from 2.7 to 5 volts single supply
(±1.35V to ±2.5V dual supply).
The AD8628 family provides the benefits previously found only
in expensive auto-zeroing or chopper-stabilized amplifiers. Using Analog Devices’ new topology these zero-drift amplifiers
combine low cost, with high accuracy and low noise. (No
external capacitors are required.) In addition, the AD8628
greatly reduces the digital switching noise found in most chopper stabilized amplifiers.
With an offset voltage of only 1µV, drift less than 0.005 µV/°C
and noise of only 0.5uV P-P (0Hz to 10 Hz) the AD8628 is
perfectly suited for applications where error sources cannot be tolerated. Position and pressure sensors, medical equipment, and
strain gage amplifiers benefit greatly from nearly zero drift over
their operating temperature range. Many systems may take
advantage of the rail-to-rail input and output swings provided by
the AD8628 family to reduce input biasing complexity and
maximize SNR. The AD8628 family is specified for the extended industrial
(-40° to +125°C) temperature range. The AD8628 amplifier is
available in the tiny SOT23 and the popular 8-pin narrow
SOIC plastic packages.
5-Lead SOT
(RT-5) 8-Lead SO
(R-8)
PRELIMINARY TECHNICAL DATA ELECTRICAL SPECIFICATIONS (@ VS=+5.0V, VCM = +2.5V, VO=+2.5V, TA=+25°C unless otherwise specified.)
Note 1: Gain testing is highly dependent upon test bandwidth.
PRELIMINARY TECHNICAL DATA
ELECTRICAL SPECIFICATIONS (@ VS=+2.7V, VCM = +1.35 V, VO=1.4V, TA=+25°C unless otherwise specified.) PRELIMINARY TECHNICAL DATA
ABSOLUTE MAXIMUM RATINGS Supply Voltage..........................................................................+6V
Input Voltage......................................................GND to Vs + 0.3V
Differential Input Voltage1.....................................................±5.0V
Output Short-Circuit Duration to Gnd...............................Indefinite
Storage Temperature Range
RT, R Package...............................................-65°C to +150°C
Operating Temperature Range
AD8628.........................................................-40°C to +125°C
Junction Temperature Range
RT, R Package...............................................-65°C to +150°C
Lead Temperature Range (Soldering, 10 sec).......................+300°C
NOTES Differential input voltage is limited to ±5.0 volts or the supply voltage, whichever is less. θJA is specified for the worst case conditions, i.e., θJA is specified for device in socket
for P-DIP packages; θJAis specified for device soldered in circuit board for SOIC and
TSSOP packages.
ORDERING GUIDE :
www.ic-phoenix.com
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