AD8675ARZ Audio Power Amplifier IC Precision Amplifiers 36V Prec
2.8nV/Hz RRO
FEATURES
- Very low voltage noise: 2.8 nV/√Hz Rail-to-rail output swing
- Low input bias current: 2 nA maximum Very low offset voltage: 75 μV
maximum Low input offset drift: 0.6 μV/°C maximum Very high gain:
120 dB
- Wide bandwidth: 10 MHz typical ±5 V to ±18 V operation
APPLICATIONS
- Precision instrumentation PLL filters
- Laser diode control loops Strain gage amplifiers
- Medical instrumentation Thermocouple amplifiers
GENERAL DESCRIPTION
The AD8675 precision operational amplifier has ultralow offset,
drift, and voltage noise combined with very low input bias currents
over the full operating temperature range. The AD8675 is a
precision, wide bandwidth op amp featuring rail-to-rail output
swings and very low noise. Operation is fully specified from
±5 V to ±15 V.
The AD8675 features a rail-to-rail output like that of the OP184,
but with wide bandwidth and even lower voltage noise, combined with
the precision and low power consumption like that of the
industry-standard OP07 amplifier. Unlike other low noise, rail-
to-rail op amps, the AD8675 has very low input bias current and low
input current noise.
With typical offset voltage of only 10 μV, offset drift of 0.2
μV/°C, and noise of only 0.10 μV p-p (0.1 Hz to 10 Hz), the AD8675
is perfectly suited for applications where large error sources
cannot be tolerated. For applications with even lower offset
tolerances, the proprietary nulling capability allows a combination
of both device and system offset errors up to 3.5 mV (referred to
the input) to be compensated externally. Unlike previous circuits,
the AD8675 accommodates this adjustment without adversely affecting
the offset drift, CMRR, and PSRR of the amplifier. Precision
instrumentation, PLL, and other precision filter circuits, position
and pressure sensors, medical instrumentation, and strain gage
amplifiers benefit greatly from the very low noise, low input bias
current, and wide bandwidth. Many systems can take advantage of the
low noise, dc precision, and rail-to-rail output swing provided by
the AD8675 to maximize SNR and dynamic range.
The smaller packages and low power consumption afforded by the
AD8675 allow maximum channel density or minimum board size for
space-critical equipment.
The AD8675 is specified for the extended industrial temperature
range (−40°C to +125°C). The AD8675 amplifier is available in the
tiny 8-lead MSOP, and the popular 8-lead, narrow SOIC, RoHS
compliant packages. MSOP packaged devices are only available in
tape and reel format.
For the dual version of this ultraprecision, rail-to-rail op amp,
see the AD8676 data sheet.
The AD8675 and AD8676 are members of a growing series of low noise
op amps offered by Analog Devices, Inc.
