Datasheet AD8500 (Analog Devices)

Micropower Precision CMOS Operational Amplifier AD8500 FEATURES PIN CONFIGURATION Supply current: 1 μA maximum OUT A 1 5 V+ Offset voltage: 1 mV maximum AD8500 V– 2 Single-supply or dual-supply operation TOP VIEW
1
(Not to Scale)
-00 5
Rail-to-rail input and output +IN 3 4 –IN
00 06
No phase reversal
Figure 1. 5-Lead SC70
Unity gain stable APPLICATIONS Portable equipment Remote sensors Low power filters Threshold detectors Current sensing GENERAL DESCRIPTION
The AD8500 is a low power, precision CMOS op amp featuring The ability to swing rail-to-rail at both the input and output a maximum supply current of 1 μA. The AD8500 has a maximum helps maximize dynamic range and signal-to-noise ratio in offset voltage of 1 mV and a typical input bias current of 1 pA; it systems that operate at very low voltages. The low offset voltage operates rail-to-rail on both the input and output. The AD8500 allows the AD8500 to be used in systems with high gain without can operate from a single-supply voltage of +1.8 V to +5.5 V or having excessively large output offset errors, and it provides a dual-supply voltage of ±0.9 V to ±2.75 V. high accuracy without the need for system calibration. With its low power consumption, low input bias current, and The AD8500 is fully specified over the industrial temperature rail-to-rail input and output, the AD8500 is ideally suited for range (−40°C to +85°C) and is operational over the extended a variety of battery-powered portable applications. Potential industrial temperature range (−40°C to +125°C). It is available applications include ECGs, pulse monitors, glucose meters, in a 5-lead, SC70 surface-mount package. smoke and fire detectors, vibration monitors, and backup battery sensors.
Table 1. Low Supply Current Op Amps Supply Current 1 μA 10 μA 20 μA
Single AD8500 Dual AD8502 ADA4505-2 AD8506 Quad AD8504 ADA4505-4 AD8508
Rev. B 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. 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. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2006–2009 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS PIN CONFIGURATION GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS OUTLINE DIMENSIONS ORDERING GUIDE