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Preliminary Technical Data
FEATURES
Supply current: 1 A maximum/amplifier Offset voltage: 3 mV maximum Single-supply or dual-supply operation Rail-to-rail input and output No phase reversal Unity gain stable
1 Micropower Precision CMOS Operational Amplifier AD8502/AD8504
PIN CONFIGURATIONS
OUT A 1
8
V+
V- 4
5
+IN B
Figure 1. 8-Lead SOT23
APPLICATIONS
Portable equipment Remote sensors Low power filters Threshold detectors Current sensing
OUT A IN A +IN A V+ +IN B -IN B
1 2 3 4 5 6 7 14 OUT D 13 -IN D
AD8504
TOP VIEW (Not to Scale)
12 +IN D 11 V- 10 +IN C 9 8
-IN C OUT C
06323-02
GENERAL DESCRIPTION
The AD850x family are low power, precision CMOS op amps featuring a maximum supply current of 1 A. The AD850x family has a maximum offset voltage of 3 mV and a typical input bias current of 1 pA, and it operates rail-to-rail on both the input and output. The AD850x family can operate from a singlesupply 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 AD850x family is ideally suited for a variety of battery-powered portable applications. Potential applications include bedside monitors, pulse monitors, glucose meters, smoke and fire detectors, vibration monitors, and backup battery sensors.
OUT B
Figure 2. 14-Lead TSSOP (RU-14)
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 AD850x family 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 AD850x family is fully specified over the industrial temperature range (-40C to +85C) and is operational over the extended industrial temperature range (-40C to +125C). The AD8502 is available in a 8-lead, SOT23 surface-mount package. The AD8504 is available in 14-lead TSSOP surface-mount package.
Rev. PrB
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.
DataSheet 4 U .com
06323-001
-IN A 2 AD8502 7 OUT B TOP VIEW +IN A 3 (Not to Scale) 6 -IN B
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AD8502/AD8504 TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configuration............................................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 5
Preliminary Technical Data
Thermal Resistance .......................................................................5 ESD Caution...................................................................................5 Typical Performance Characteristics ........ Error! Bookmark not defined. Outline Dimensions .................... Error! Bookmark not defined. Ordering Guide ....................... Error! Bookmark not defined.
REVISION HISTORY
Rev. PrB | Page 2 of 6
DataSheet 4 U .com
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Preliminary Technical Data SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
@ VS = +5 V, 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 Conditions 0 V < VCM < 5 V -40C < TA < +85C -0.3 Min
AD8502/AD8504
Typ 0.5
Max 3 10 +5.3 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
1
0.5
Common-Mode Rejection Ratio Large Signal Voltage Gain Input Capacitance OUTPUT CHARACTERISTICS Output Voltage High
CMRR AVO CDIFF CCM VOH
75 65 98 80 2 4.5
RLOAD = 100 k to GND RLOAD = 10 k to GND
4.970 4.900 5 20
Output Voltage Low
VOL
RLOAD = 100 k to VS RLOAD = 10 k to VS
mV mV mA
Short-Circuit Current POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier
ISC
VOUT = GND
PSRR ISY
1.8 V < VS < 5 V -40C < TA < +85C VO = VS/2 -40C < TA < +85C -40C < TA < +125C
90 70 1 1.5 2 0.004 7 60
dB dB A A A V/s kHz Degrees V p-p nV/Hz pA/Hz
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
en in
6 190 0.1
Rev. PrB | Page 3 of 6
DataSheet 4 U .com
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AD8502/AD8504
@ VS = +1.8 V, 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 Large Signal Voltage Gain AVO 0.1 V < VOUT < 1.7 V 0.1 V < VOUT < 1.7 V; -40C < TA < +85C Input Capacitance OUTPUT CHARACTERISTICS Output Voltage High CDIFF CCM VOH RLOAD = 100 k to GND RLOAD = 10 k to GND Output Voltage Low VOL RLOAD = 100 k to VS RLOAD = 10 k to VS Short-Circuit Current POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier ISC PSRR ISY 1.8 V < VS < 5 V -40C < TA < +85C VO = VS/2 -40C < TA < +85C -40C < TA < +125C Conditions 0 V < VCM < 1.8 V -40C < TA < +85C
Preliminary Technical Data
Min
Typ 0.5 3.5
Max 3 12 +2.1 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
CMRR
60 55 88 70 2 4.5 1.790 1.760 5 20
mV mV mA
90 70 1 1.5 2 0.004
dB dB A A A V/s kHz Degrees V p-p nV/Hz pA/Hz
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
en in
6 190 0.1
Rev. PrB | Page 4 of 6
DataSheet 4 U .com
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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
AD8502/AD8504
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 8-lead SOT23 (RJ-8) 14-lead TSSOP (RU-14) JA 376 180 JC 126 35 Unit C/W 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.
2.90 BSC
8
7
6
5
1.60 BSC
1 2 3 4
2.80 BSC
PIN 1 INDICATOR 0.65 BSC *0.90 0.87 0.84 *1.00 MAX 0.38 0.22 0.20 0.08 8 4 0 1.95 BSC
0.10 MAX
SEATING PLANE
0.60 0.45 0.30
*COMPLIANT TO JEDEC STANDARDS MO-193-BA WITH THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS.
Figure 2. 8-Lead Thin Small Outline Transistor Package [TSOT] (UJ-8) Dimensions shown in millimeters
Rev. PrB | Page 5 of 6
DataSheet 4 U .com
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AD8502/AD8504
5.10 5.00 4.90
Preliminary Technical Data
14
8
4.50 4.40 4.30
1 7
6.40 BSC
PIN 1 1.05 1.00 0.80 0.65 BSC 1.20 MAX 0.15 0.05 0.30 0.19 0.20 0.09 8 0 0.75 0.60 0.45
SEATING COPLANARITY PLANE 0.10
COMPLIANT TO JEDEC STANDARDS MO-153-AB-1
Figure 3. 14-Lead Thin Shrink Small Outline Package [TSSOP] (RU-14) Dimensions shown in millimeters
Rev. PrB | Page 6 of 6
DataSheet 4 U .com
PR06323-0-9/06(PrB)

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