AD8506_07 Datasheet, PDF (1/20 Pages) Analog Devices – 20 μA Maximum, Rail-to-Rail I/O, Zero Input Crossover Distortion Amplifiers

20 μA Maximum, Rail-to-Rail I/O,
Zero Input Crossover Distortion Amplifiers
AD8506/AD8508
FEATURES
PSRR: 100 dB minimum
CMRR: 105 dB typical
Very low supply current: 20 μA per amp maximum
1.8 V to 5 V single-supply or ±0.9 V to ±2.5 V dual-supply
operation
Rail-to-rail input and output
Low noise: 45 nV/√Hz @ 1 kHz
2.5 mV offset voltage maximum
Very low input bias current: 1 pA typical
APPLICATIONS
Pressure and position sensors
Remote security
Bio sensors
IR thermometers
Battery-powered consumer equipment
Hazard detectors
GENERAL DESCRIPTION
The AD8506/AD8508 are dual and quad micropower amplifiers
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.
Using a novel circuit technology, these low cost amplifiers offer
zero crossover distortion (excellent PSRR and CMRR perform-
ance) and very low bias current, while operating with a supply
current of less than 20 μA per amplifier. This amplifier family
offers the lowest noise in its power class.
This combination of features makes the AD8506/AD8508
amplifiers ideal choices for battery-powered applications
because they minimize errors due to power supply voltage
variations over the lifetime of the battery and maintain high
CMRR even for a rail-to-rail input op amp.
PIN CONFIGURATIONS
OUT A 1
–IN A 2
+IN A 3
V– 4
AD8506
TOP VIEW
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
Figure 1. 8-Lead MSOP (RM-8)
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3 _AD8508 12 +IN D
V+ 4 TOP VIEW 11 V–
+IN B 5 ^{(Not to Scale)} 10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
Figure 2. 14-Lead TSSOP (RU-14)
Remote battery-powered sensors, handheld instrumentation
and consumer equipment, hazard detection (for example, smoke,
fire, and gas), and patient monitors can benefit from the features
of the AD8506/AD8508 amplifiers.
The AD8506/AD8508 are specified for both the industrial
temperature range of −40°C to +85°C and the extended industrial
temperature range of −40°C to +125°C. The AD8506 dual amplifi-
ers are available in an 8-lead MSOP package. The AD8508 quad
amplifiers are available in the 14-lead TSSOP package.
Rev. A
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