AD8505_16 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
AD8505/AD8506/AD8508
FEATURES
PSRR: 100 dB minimum
CMRR: 105 dB typical
Very low supply current: 20 μA per amplifier maximum
1.8 V to 5 V single supply or ±0.9 V to ±2.5 V dual supply
Rail-to-rail input/output
Low noise: 45 nV/√Hz at 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 AD8505/AD8506/AD8508 are single, dual, and quad micro-
power amplifiers featuring rail-to-rail input/output swings while
operating from a single 1.8 V to 5 V power supply or from dual
±0.9 V to ±2.5 V power supplies. Using a new circuit technology,
these amplifiers offer zero input crossover distortion (excellent
PSRR and CMRR performance) and 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 AD8505/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. Remote battery-powered sensors, handheld
instrumentation, consumer equipment, hazard detection (for
example, smoke, fire, and gas), and patient monitors can benefit
from the features of the AD8505/AD8506/AD8508 amplifiers.
The AD8505/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 AD8505 single ampli-
fier is available in a tiny 5-lead SOT-23 and a 6-ball WLCSP
packages. The AD8506 dual amplifier is available in 8-lead MSOP
and 8-ball WLCSP packages. The AD8508 quad amplifier is
available in 14-lead TSSOP and 14-ball WLCSP packages. The
AD8505/AD8506/AD8508 are members of a growing series of
zero crossover distortion op amps offered by Analog Devices,
Inc., including the ADA4505-1/ADA4505-2/ADA4505-4, that
operate from a single 1.8 V to 5 V supply or from dual ±0.9 V to
±2.5 V power supplies.
PIN CONFIGURATIONS
BALL A1
INDICATOR
OUT 1
5 V+
AD8505
V– 2 TOP VIEW
(Not to Scale)
+IN 3
4 –IN
Figure 1. 5-Lead SOT-23 (RJ-5)
OUT V+
A1 A2
V– NC
B1 B2
+IN –IN
C1 C2
AD8505
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
NC = NO CONNECT
Figure 2. 6-Ball WLCSP (CB-6-7)
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 3. 8-Lead MSOP (RM-8)
BALL A1
CORNER
OUT B V+ OUT A
A1 A2 A3
–IN B
B1
–IN A
B3
+IN B V– +IN A
C1 C2 C3
AD8506
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
Figure 4. 8-Ball WLCSP (CB-8-2)
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 5. 14-Lead TSSOP (RU-14)
BALL A1
CORNER
OUTD
A1
OUTA
A2
–INA
A3
–IND
V–
+INA
B1
B2
B3
+IND
C1
+INB
C3
+INC
V+
–INB
D1
D2
D3
–INC
E1
OUTC
E2
OUTB
E3
AD8508
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
Figure 6. 14-Ball WLCSP (CB-14-1)
Rev. E
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