FEATURES Supply current: 1 μA 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 PIN CONFIGURATIONS OUT A 1 V+ 8 –IN A 2 AD8502 7 OUT B TOP VIEW +IN A 3 (Not to Scale) 6 –IN B V– 4 +IN B 5 06323-001 Preliminary Technical Data 1μ Micropower Precision CMOS Operational Amplifier AD8502/AD8504 Figure 1. 8-Lead SOT23 APPLICATIONS GENERAL DESCRIPTION The AD850x family are low power, precision CMOS op amps featuring a maximum supply current of 1 μA. 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. OUT A 1 14 OUT D IN A 2 13 –IN D +IN A 3 AD8504 V+ 4 TOP VIEW (Not to Scale) +IN B 5 10 +IN C –IN B 6 9 –IN C OUT B 7 8 OUT C 12 +IN D 11 V– 06323-02 Portable equipment Remote sensors Low power filters Threshold detectors Current sensing Figure 2. 14-Lead TSSOP (RU-14) 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. 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 (−40°C to +85°C) and is operational over the extended industrial temperature range (−40°C to +125°C). 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 ©2006 Analog Devices, Inc. All rights reserved. AD8502/AD8504 Preliminary Technical Data TABLE OF CONTENTS Features .............................................................................................. 1 Thermal Resistance .......................................................................5 Applications....................................................................................... 1 ESD Caution...................................................................................5 General Description ......................................................................... 1 Typical Performance Characteristics ........ Error! Bookmark not defined. Pin Configuration............................................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Outline Dimensions .................... Error! Bookmark not defined. Ordering Guide ....................... Error! Bookmark not defined. Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 5 REVISION HISTORY Rev. PrB | Page 2 of 6 Preliminary Technical Data AD8502/AD8504 SPECIFICATIONS ELECTRICAL CHARACTERISTICS @ VS = +5 V, VCM = VS/2, TA = 25°C, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Voltage Range Input Bias Current Symbol Conditions VOS ∆VOS/∆T 0 V < VCM < 5 V −40°C < TA < +85°C Min Typ Max Unit 0.5 3 10 +5.3 10 100 600 5 50 100 mV μV/°C V pA pA pA pA pA pA dB dB dB dB pF pF −0.3 IB 1 −40°C < TA < +85°C −40°C < TA < +125°C Input Offset Current IOS Common-Mode Rejection Ratio CMRR Large Signal Voltage Gain AVO Input Capacitance CDIFF CCM OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Current POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Current Noise Density VOH VOL 0.5 −40°C < TA < +85°C −40°C < TA < +125°C 0 V < VCM < 5 V −40°C < TA < +85°C 0.1 V < VOUT < 4.9 V 0.1 V < VOUT < 4.9 V; −40°C < TA < +85°C 2 4.5 RLOAD = 100 kΩ to GND 4.970 V RLOAD = 10 kΩ to GND 4.900 V RLOAD = 100 kΩ to VS 5 mV RLOAD = 10 kΩ to VS 20 mV ISC VOUT = GND PSRR 1.8 V < VS < 5 V −40°C < TA < +85°C VO = VS/2 −40°C < TA < +85°C −40°C < TA < +125°C ISY SR GBP ØO en in 75 65 98 80 0.1 Hz to 10 Hz f = 1 kHz f = 1 kHz Rev. PrB | Page 3 of 6 mA 90 70 1 1.5 2 dB dB μA μA μA 0.004 7 60 V/μs kHz Degrees 6 190 0.1 μV p-p nV/√Hz pA/√Hz AD8502/AD8504 Preliminary Technical Data @ VS = +1.8 V, VCM = VS/2, TA = 25°C, unless otherwise noted. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Voltage Range Input Bias Current Symbol Conditions VOS ∆VOS/∆T 0 V < VCM < 1.8 V −40°C < TA < +85°C Min Typ Max Unit 0.5 3.5 3 12 +2.1 10 100 600 5 50 100 −40°C < TA < +85°C −40°C < TA < +125°C 0 V < VCM < 1.8 V 60 mV μV/°C V pA pA pA pA pA pA dB −40°C < TA < +85°C 55 dB 0.1 V < VOUT < 1.7 V 88 dB 0.1 V < VOUT < 1.7 V; −40°C < TA < +85°C 70 −0.3 IB 1 −40°C < TA < +85°C −40°C < TA < +125°C Input Offset Current Common-Mode Rejection Ratio IOS CMRR Large Signal Voltage Gain AVO Input Capacitance CDIFF CCM OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Current POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Current Noise Density VOH VOL 0.5 dB pF pF 2 4.5 RLOAD = 100 kΩ to GND 1.790 V RLOAD = 10 kΩ to GND 1.760 V RLOAD = 100 kΩ to VS 5 mV RLOAD = 10 kΩ to VS 20 mV ISC PSRR ISY mA 1.8 V < VS < 5 V −40°C < TA < +85°C VO = VS/2 −40°C < TA < +85°C −40°C < TA < +125°C SR GBP ØO en in 0.1 Hz to 10 Hz f = 1 kHz f = 1 kHz Rev. PrB | Page 4 of 6 90 70 1 1.5 2 dB dB μA μA μA 0.004 V/μs kHz Degrees 6 190 0.1 μV p-p nV/√Hz pA/√Hz Preliminary Technical Data AD8502/AD8504 ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. 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. 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 −65°C to +150°C 300°C −40°C to +125°C −65°C to +150°C Absolute maximum ratings apply at 25°C, unless otherwise noted. THERMAL RESISTANCE θJA 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) 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 2 3 4 1.60 BSC 2.80 BSC PIN 1 INDICATOR 0.65 BSC *0.90 1.95 BSC 0.87 0.84 *1.00 MAX 0.10 MAX 0.38 0.22 SEATING PLANE 0.20 0.08 8° 4° 0° *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 0.60 0.45 0.30 θJA 376 180 θJC 126 35 Unit °C/W °C/W AD8502/AD8504 Preliminary Technical Data 5.10 5.00 4.90 14 8 4.50 4.40 4.30 1 7 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 SEATING COPLANARITY PLANE 0.10 8° 0° 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 0.75 0.60 0.45 PR06323-0-9/06(PrB) 6.40 BSC