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Preliminary Technical Data
FEATURES
Supply current: 1 A maximum Offset voltage: 1 mV maximum Single-supply or dual-supply operation Rail-to-rail input and output No phase reversal Unity gain stable
Micropower Precision CMOS Operational Amplifier AD8500
PIN CONFIGURATION
OUT A 1 V- 2 +IN 3
5
V+
06005-001
AD8500
TOP VIEW (Not to Scale)
4
-IN
Figure 1. 5-Lead SC70
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 a maximum supply current of 1 A. The AD8500 has a maximum offset voltage of 1 mV and a typical input bias current of 1 pA, and it operates rail-to-rail on both the input and output. The AD8500 can operate from a single-supply voltage of +1.8 V to +5.5 V or a dual-supply voltage of 0.9 V to 2.75 V. With its low power consumption, low input bias current, and rail-to-rail input and output, the AD8500 is ideally suited for a variety of battery-powered portable applications. Potential applications include ECGs, pulse monitors, glucose meters, smoke and fire detectors, vibration monitors, and backup battery sensors. The ability to swing rail-to-rail at both the input and output helps maximize dynamic range and signal-to-noise ratio in systems that operate at very low voltages. The low offset voltage allows the AD8500 to be used in systems with high gain without having excessively large output offset errors, and it provides high accuracy without the need for system calibration. The AD8500 is fully specified over the industrial temperature range (-40C to +85C) and is operational over the extended industrial temperature range (-40C to +125C). It is available in a 5-lead, SC70 surface-mount package.
Rev. PrA
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. Trademarks and registered trademarks are the property of their respective owners.
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 (c)2006 Analog Devices, Inc. All rights reserved.
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AD8500 TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configuration............................................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3
Preliminary Technical Data
Absolute Maximum Ratings ............................................................5 Thermal Resistance .......................................................................5 ESD Caution...................................................................................5 Outline Dimensions ..........................................................................6 Ordering Guide .............................................................................6
REVISION HISTORY
3/06--PrA: Initial Version
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Preliminary Technical Data SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
@ VS = +5V, VCM = VS/2, TA = 25C, unless otherwise noted. Table 1.
Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Voltage Range Input Bias Current Symbol VOS VOS/T IB -40C < TA < +85C -40C < TA < +125C Input Offset Current IOS -40C < TA < +85C -40C < TA < +125C 0 V < VCM < 5 V -40C < TA < +85C 0.1 V < VOUT < 4.9 V 0.1 V < VOUT < 4.9 V; -40C < TA < +85C 0.5 Conditions 0 V < VCM < +5 V -40C < TA < +85C -0.3 1 Min Typ 0.235 3 Max 1 10 +5.3 10 100 600 5 50 100
AD8500
Unit mV V/C V pA pA pA pA pA pA dB dB dB dB pF pF V V mV mV mA dB dB A A A V/s kHz Degrees Vp-p nV/Hz fA/Hz
Common-Mode Rejection Ratio Large Signal Voltage Gain Input Capacitance OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Current POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier
CMRR AVO CDIFF CCM VOH VOL ISC PSRR ISY
75 70 98 80
90 90 120 TBD TBD
RLoad = 100 k to GND RLoad = 10 k to GND RLoad = 100 k to VS RLoad = 10 k to VS VOUT = GND 1.8 V < VS < 5 V -40C < TA < +85C VO = VS/2 -40C < TA < +85C -40C < TA < +125C
4.970 4.900
4.995 4.960 0.85 6.5 TBD 110 0.75
5 15
90 80
1 1.5 2
DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Current Noise Density
SR GBP OO 0.1 Hz to 10 Hz f = 1 kHz f = 1 kHz
0.004 7 60 6 190 TBD
en in
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AD8500
@ VS = +1.8V, VCM = VS/2, TA = 25C, unless otherwise noted. Table 2.
Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Voltage Range Input Bias Current Symbol VOS VOS/T IB -40C < TA < +85C -40C < TA < +125C Input Offset Current IOS -40C < TA < +85C -40C < TA < +125C 0 V < VCM < 1.8 V -40C < TA < +85C 0.1 V < VOUT < 1.7 V 0.1 V < VOUT < 1.7 V; -40C < TA < +85C Conditions 0 V < VCM < +1.8 V -40C < TA < +85C
Preliminary Technical Data
Min
Typ 0.235 3.5
Max 1 12 +1.8 10 100 600 5 50 100
Unit mV V/C V pA pA pA pA pA pA dB dB dB dB pF pF V V
-0.3 1
0.5
Common-Mode Rejection Ratio Large Signal Voltage Gain Input Capacitance OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Current POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier
CMRR AVO CDIFF CCM VOH VOL ISC PSRR ISY
65 60 88 70
85 83 115 TBD TBD
RLoad = 100 k to GND RLoad = 10 k to GND RLoad = 100 k to VS RLoad = 10 k to VS
1.790 1.760
1.798 1.783 0.70 5 TBD 5 15
mV mV mA dB dB A A A V/s kHz Degrees Vp-p nV/Hz fA/Hz
1.8 V < VS < 5 V -40C < TA < +85C VO = VS/2 -40C < TA < +85C -40C < TA < +125C
90 80
110 0.65 1 1.5 2
DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Current Noise Density
SR GBP OO 0.1 Hz to 10 Hz f = 1 kHz f = 1 kHz
0.004 7 60 6 190 TBD
en in
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Preliminary Technical Data ABSOLUTE MAXIMUM RATINGS
TA = 25C, unless otherwise noted. Table 3.
Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit Duration to GND Storage Temperature Range Lead Temperature (Soldering, 60 sec) Operating Temperature Range Junction Temperature Range Rating 6V VSS - 0.4 V to VDD + 0.4 V 6 V Indefinite -65C to +150C 300C -40C to +125C -65C to +150C
AD8500
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Absolute maximum ratings apply at 25C, unless otherwise noted.
THERMAL RESISTANCE
JA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 4. Thermal Characteristics
Package Type 5-Lead SC70 (KS-5) JA 376 JC 126 Unit C/W
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
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AD8500 OUTLINE DIMENSIONS
2.20 2.00 1.80 1.35 1.25 1.15 PIN 1 0.65 BSC 1.00 0.90 0.70 1.10 0.80 0.40 0.10
5 1 2 4 3
Preliminary Technical Data
2.40 2.10 1.80
0.10 MAX
0.30 0.15
SEATING PLANE
0.22 0.08
0.46 0.36 0.26
0.10 COPLANARITY COMPLIANT TO JEDEC STANDARDS MO-203-AA
Figure 2. 5-Lead Thin Shrink Small Outline Transistor Package [SC70] (KS-5) Dimensions shown in millimeters
ORDERING GUIDE
Model AD8500AKSZ-R21 AD8500AKSZ-REEL1 AD8500AKSZ-REEL71
1
Temperature Range -40C to +125C -40C to +125C -40C to +125C
Package Description 5-Lead SC70 5-Lead SC70 5-Lead SC70
Package Option KS-5 KS-5 KS-5
Branding A0F A0F A0F
Z = Pb-free part.
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Preliminary Technical Data NOTES
AD8500
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AD8500 NOTES
Preliminary Technical Data
(c)2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR06005-0-3/06(PrA)
T T
Rev. PrA | Page 8 of 8

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