Datasheet AD8505, AD8506, AD8508 (Analog Devices)

20 μA Maximum, Rail-to-Rail I/O, Zero Input Crossover Distortion Amplifiers Data Sheet 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
these amplifiers offer zero input crossover distortion (excellent
OUT A 1 8 V+ –IN A AD8506 2 7 OUT B
PSRR and CMRR performance) and low bias current while
TOP VIEW AD8506 +IN A
1
3 6 –IN B TOP VIEW
operating with a supply current of less than 20 μA per amplifier.
(Not to Scale)
-00 002
V–
00
4 5 +IN B
0-
(BALL SIDE DOWN) Not to Scale
069 This amplifier family offers the lowest noise in its power class. 690 0 Figure 3. 8-Lead MSOP (RM-8) Figure 4. 8-Ball WLCSP (CB-8-2) This combination of features makes the AD8505/AD8506/AD8508 amplifiers ideal choices for battery-powered applications because
BALL A1 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
example, smoke, fire, and gas), and patient monitors can benefit
C1 C3 –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
The AD8505/AD8506/AD8508 are specified for both the industrial
V+ 4 TOP VIEW 11 V– –INC OUTC OUTB 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
temperature range of −40°C to +125°C. The AD8505 single ampli- 4 45 0 10
OUT B TOP VIEW 7 8 OUT C (BALL SIDE DOWN)
0- fier is available in a tiny 5-lead SOT-23 and a 6-ball WLCSP
Not to Scale
90 06900- 06 packages. The AD8506 dual amplifier is available in 8-lead MSOP Figure 5. 14-Lead TSSOP (RU-14) Figure 6. 14-Ball WLCSP (CB-14-1) 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 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