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| Preliminary Technical Data FEATURES Lower price version of AD8661/AD8662/AD8664 Offset voltage: 2.5 mV max Low input bias current: 1 pA max Single-supply operation: 5 V to 16 V Dual-supply operation: 2.5 V to 8 V Low noise: 10 nV/Hz Wide bandwidth: 4 MHz Rail-to-rail output Unity gain stable MSL 1 rating Lead-free packaging 16 V, 4 MHz Rail-to-Rail Output Amplifier AD8665 ADC driver Level shifting circuits PIN CONFIGURATIONS OUT V+IN 1 5 V+ AD8665 2 3 TOP VIEW (Not to Scale) 3 - IN NC = NO CONNECT Figure 1. AD8665, 5-Lead SOT (RJ-5) NC 1 8 NC V+ OUT NC APPLICATIONS Sensor amplification Reference buffers Medical equipment Physiological measurements Signal filters and conditioning Consumer audio Photodiode amplification -IN 2 +IN 3 AD8665 7 6 5 TOP VIEW (Not to Scale) V- 4 NC = NO CONNECT Figure 2. AD8665, SOIC (R-8) GENERAL DESCRIPTION The AD8665 is a rail-to-rail output single supply with low noise performance featuring an extended operating range with supply voltages up to 16 V. They also feature low input bias currents, wide signal bandwidth, and low input voltage and current noise. For lower offset voltage precision, choose the AD8661 (single). The combination of offsets, very low input bias currents and wide supply range make these amplifiers useful in a wide variety of cost-sensitive applications normally associated with much higher priced JFET amplifiers. Systems utilizing high impedance sensors, such as photo diodes benefit from the combination of low input bias current, low noise, and low offset and bandwidth. The wide operating voltage range matches today's high performance ADCs and DACs. Audio applications and medical monitoring equipment can take advantage of the high input impedance, low voltage and current noise, wide bandwidth, and the lack of "popcorn" noise found in many other low input bias current amplifiers. The AD8665 is specified over the extended industrial (-40 to +125C) temperature range. 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. AD8665 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Pin Configurations ........................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 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 5/06--Rev 0: Initial Version Rev. PrA | Page 2 of 6 Preliminary Technical Data SPECIFICATIONS VDD = 5.0 V, VCM = VDD/2, TA = 25oC, unless otherwise noted. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol VOS Conditions VCM = 2.5 V VCM = -0.1 V to +3.0 V -40C < TA < +125C -40C < TA < +125C -40C < TA < +125C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large-Signal Voltage Gain OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Output Current Closed-Loop Output Impedance POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Channel Separation IOS -40C < TA < +125C VCM CMRR AVO VOH VOL ISC ZOUT PSRR ISY -40C < TA < +125C SR GBP M en p-p en CS RL = 2 k 3.5 4 70 2.4 12 10 -115 VCM = -0.1 V to +3.0 V -40C < TA < +125C RL = 2 k, VO = 0.5 V to 4.5 V IOUT = 1 mA -40C < TA < +125C IOUT = 1 mA -40C < TA < +125C At 1MHz, AV = 1 VDD = 5.0 V to 16 V -40C < TA < +125C 98 94 -0.1 84 80 68 4.88 4.86 100 145 4.93 50 19 50 115 1.1 1.4 2.0 70 105 0.1 Min Typ 0.7 Max 2.5 3.0 5.0 10 1 550 0.5 70 +3.0 AD8665 Unit mV mV mV V/C pA pA pA pA V dB dB V/mV V V mV mV mA dB dB mA mA V/s MHz Degrees V p-p nV/Hz nV/Hz dB Offset Voltage Drift Input Bias Current VOS/T IB 3.0 0.2 0.1 Hz to 10 Hz f = 1 kHz f = 10 kHz f = 10 kHz Rev. PrA | Page 3 of 6 AD8665 VDD = 16 V, VCM = VDD/2, TA = 25oC, unless otherwise noted. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol VOS Conditions VCM = 8 V VCM = -0.1 V to +14.0 V -40C < TA < +125C -40C < TA < +125C -40C < TA < +125C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large-Signal Voltage Gain OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Output Current Closed-Loop Output Impedance POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Channel Separation IOS -40C < TA < +125C VCM CMRR AVO VOH VOL ISC ZOUT PSRR ISY -40C < TA < +125C SR GBP M en p-p en CS RL = 2 k VCM = -0.1 V to +14.0 V -40C < TA < +125C RL = 2 k, VO = 0.5 V to 15.5 V IOUT = 1 mA -40C < TA < +125C IOUT = 1 mA -40C < TA < +125C At 1MHz, AV = 1 VDD = 5.0 V to 16 V -40C < TA < +125C Preliminary Technical Data Min Typ 0.6 Max 2.5 3.0 5.0 10 1 550 0.5 70 +14.0 Unit mV mV mV V/C pA pA pA pA V dB dB V/mV V V mV mV mA dB dB mA mA V/s MHz Degrees V p-p nV/Hz nV/Hz dB Offset Voltage Drift Input Bias Current VOS/T IB 3.0 0.2 0.1 -0.1 90 80 130 15.94 15.90 105 255 15.96 22 140 50 36 50 98 94 115 1.15 1.55 2.0 3.5 4 73 2.5 12 10 -115 0.1 Hz to 10 Hz f = 1 kHz f = 10 kHz f = 10 kHz Rev. PrA | Page 4 of 6 Preliminary Technical Data ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit to GND Storage Temperature Range Operating Temperature Range Lead Temperature Range (Soldering, 60 sec) Junction Temperature Rating 18 V GND to VDD 18 V Indefinite -65C to +150C -40C to +125C 300C 150C AD8665 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. THERMAL RESISTANCE Table 4. Thermal Resistance Package Type JA 8-Lead SOIC_N (R-8) 158 5-Lead SOT (J-8) 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. JC 43 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 Rev. PrA | Page 5 of 6 AD8665 NOTES Preliminary Technical Data Rev. PrA | Page 6 of 6 PR06195-0-6/06(PrA) |
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