Datasheet AD8505, AD8506, AD8508 (Analog Devices)

20 μA Maximum, Rail-to-Rail I/O, Zero Input Crossover Distortion Amplifiers AD8505/AD8506/AD8508 FEATURES PIN CONFIGURATIONS PSRR: 100 dB minimum BALL A1 INDICATOR CMRR: 105 dB typical Very low supply current: 20 μA per amplifier maximum OUT V+ A1 A2 1.8 V to 5 V single supply or ±0.9 V to ±2.5 V dual supply Rail-to-rail input/output V– NC B1 B2 Low noise: 45 nV/√Hz at 1 kHz +IN –IN 2.5 mV offset voltage maximum C1 C2 Very low input bias current: 1 pA typical OUT 1 5 V+ AD8505 APPLICATIONS V– 2 TOP VIEW AD8505 Pressure and position sensors (Not to Scale) TOP VIEW
0
(BALL SIDE DOWN) +IN 3
1
4 –IN
10
Remote security
-05
Not to Scale
0- 00 90
NC = NO CONNECT
06
Bio sensors
069 Figure 1. 5-Lead SOT-23 (RJ-5) Figure 2. 6-Ball WLCSP (CB-6-7)
IR thermometers Battery-powered consumer equipment BALL A1 CORNER Hazard detectors OUT B V+ OUT A GENERAL DESCRIPTION A1 A2 A3
The AD8505/AD8506/AD8508 are single, dual, and quad micro-
–IN B –IN A
power amplifiers featuring rail-to-rail input/output swings while
B1 B3
operating from a single 1.8 V to 5 V power supply or from dual
+IN B V– +IN A
±0.9 V to ±2.5 V power supplies. Using a new circuit technology,
C1 C2 C3 OUT A 1 8 V+
these amplifiers offer zero input crossover distortion (excellent
–IN A AD8506 2 7 OUT B AD8506
PSRR and CMRR performance) and low bias current while
TOP VIEW +IN A 3 6 –IN B
01
(Not to Scale) TOP VIEW
0 002 0- operating with a supply current of less than 20 μA per amplifier.
V– 4 5 +IN B (BALL SIDE DOWN)
00- 90
Not to Scale
06 069 This amplifier family offers the lowest noise in its power class. Figure 3. 8-Lead MSOP (RM-8) Figure 4. 8-Ball WLCSP (CB-8-2) This combination of features makes the AD8505/AD8506/AD8508
BALL A1
amplifiers ideal choices for battery-powered applications because
CORNER
they minimize errors due to power supply voltage variations over
OUTD OUTA –INA A1 A2 A3
the lifetime of the battery and maintain high CMRR even for a rail-
–IND V– +INA
to-rail input op amp. Remote battery-powered sensors, handheld
B1 B2 B3
instrumentation, consumer equipment, hazard detection (for
+IND +INB OUT A 1 14 OUT D C1 C3
example, smoke, fire, and gas), and patient monitors can benefit
–IN A 2 13 –IN D +INC V+ –INB
from the features of the AD8505/AD8506/AD8508 amplifiers.
+IN A 3 12 +IN D AD8508 D1 D2 D3 V+ 4 TOP VIEW 11 V– –INC OUTC OUTB
The AD8505/AD8506/AD8508 are specified for both the industrial
E1 E2 E3 +IN B (Not to Scale) 5 10 +IN C
temperature range of −40°C to +85°C and the extended industrial
–IN B 6 9 –IN C AD8508
4 45 temperature range of −40°C to +125°C. The AD8505 single ampli- 0 10
OUT B TOP VIEW 7 8 OUT C (BALL SIDE DOWN)
0-
Not to Scale
90 fier is available in a tiny 5-lead SOT-23 and a 6-ball WLCSP 06900- 06 Figure 5. 14-Lead TSSOP (RU-14) Figure 6. 14-Ball WLCSP (CB-14-1) 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.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONFIGURATIONS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL CHARACTERISTICS—1.8 V OPERATION ELECTRICAL CHARACTERISTICS—5 V OPERATION ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION PULSE OXIMETER CURRENT SOURCE FOUR-POLE, LOW-PASS BUTTERWORTH FILTER FOR GLUCOSE MONITOR OUTLINE DIMENSIONS ORDERING GUIDE