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AD8508 Dataheets PDF



Part Number AD8508
Manufacturers Analog Devices
Logo Analog Devices
Description Zero Input Crossover Distortion Amplifiers
Datasheet AD8508 DatasheetAD8508 Datasheet (PDF)

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.

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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 micropower 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 railto-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 amplifier 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) 06900-051 06900-100 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) 06900-002 06900-001 BALL A1 CORNER OUT B A1 V+ A2 –IN B B1 +IN B C1 V– C2 OUT A A3 –IN A B3 +IN A 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) 06900-045 06900-104 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 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007–2010 Analog Devices, Inc. All rights reserved. AD8505/AD8506/AD8508 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configurations ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics—1.8 V Operation ............................ 3 Electrical Characteristics—5 V Operation................................ 4 Absolute Maximum Ratings............................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution...................................................................................5 Typical Perfo.


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