ADA4505-2 Datasheet, PDF (1/20 Pages) Analog Devices – 10 μA, Rail-to-Rail I/O, Zero Input Crossover Distortion Amplifier

10 μA, Rail-to-Rail I/O, Zero Input
Crossover Distortion Amplifier
ADA4505-2
FEATURES
PSRR: 100 dB minimum
CMRR: 105 dB typical
Very low supply current: 10 μA per amplifier maximum
1.8 V to 5 V single-supply or ±0.9 to ±2.5V dual-supply
operation
Rail-to-rail input and output
2.5 mV offset voltage maximum
Very low input bias current: 0.5 pA typical
APPLICATIONS
Pressure and position sensors
Remote security
Medical monitors
Battery-powered consumer equipment
Hazard detectors
GENERAL DESCRIPTION
The ADA4505-2 is a dual micropower amplifier featuring rail-
to-rail input and output swings while operating from a 1.8 V to
5 V single or from ±0.9 V to ±2.5 V dual power supply.
Employing a new circuit technology, this low cost amplifier
offers zero input crossover distortion (excellent PSRR and
CMRR performance) and very low bias current, while operating
with a supply current of less than 10 μA per amplifier.
This combination of features makes the ADA4505-2 amplifier
an ideal choice for battery-powered applications because it
minimizes errors due to power supply voltage variations over
the lifetime of the battery, and maintains high CMRR even for a
rail-to-rail op amp.
PIN CONFIGURATION
OUT A 1
–IN A 2
+IN A 3
V– 4
ADA4505-2
TOP VIEW
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
Figure 1. 8-Lead MSOP (RM-8)
Remote battery-powered sensors, handheld instrumentation
and consumer equipment, hazard detectors (for example, smoke,
fire, and gas), and patient monitors can benefit from the
features of the ADA4505-2 amplifier.
The ADA4505-2 is specified for both the industrial temperature
range (−40°C to +85°C) and the extended industrial temperature
range (−40°C to +125°C). The ADA4505-2 dual amplifiers are
available in the standard 8-lead MSOP package.
The ADA4505-2 is a member of a growing series of zero crossover
op amps offered by Analog Devices, Inc., including the AD8506,
which also operates from a 1.8 V to 5 V single or from ±0.9 V to
±2.5 V dual power supply.
Rev. 0
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