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| Dual, Low Power, Low Noise, Low Bias Current Precision Rail-to-Rail Output Op Amp Preliminary Technical Data FEATURES Very low offset voltage: 50 V B-grade maximum 100 V A-grade maximum Low Bias Current: 200 pA 200 A supply current Rail-to-rail output swing Low input offset drift: 0.8 V/C maximum Low voltage noise at low power 12 nV/Hz Operating Temperature: -40C to +125C 2.5 V to 18 V operation AD8622 PIN CONFIGURATIONS OUTA -INA +INA V1 2 3 4 8 V+ OUTB -INB +INB AD8622 TOP VIEW 7 6 5 Figure 1. 8-Lead SOIC or MSOP APPLICATIONS Portable Precision instrumentation Process Control Inputs Laser diode control loops Strain gage amplifiers Medical instrumentation Thermocouple amplifiers GENERAL DESCRIPTION The AD8622 is a dual low power (330 A max over temperature and supply), precision, rail-to-rail operational amplifiers. The AD8622 is designed on ADI's iPOLARTM process implementing bias cancellation circuits to guarantee low bias current over temperature. ADI's proprietary iPolar process is an advanced bipolar technology implementing vertical junction isolation with lateral trench isolation, allowing for low noise performance amplifiers in smaller die size at faster speed and lower power. These operational amplifiers offer ultralow offset, drift, and voltage noise combined with very low input bias currents over the full operating temperature range. Operation is fully specified from 5 V to 15 V. With typical offset voltage of only 10 V, offset drift of 0.2 V/C, and noise of only TBD V p-p (0.1 Hz to 10 Hz), these is perfectly suited for applications where large error sources cannot be tolerated. Many systems can take advantage of the low bias current, low noise, dc precision, and railto-rail output swing provided by the devices to maximize SNR and dynamic range for low power operation. 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) 2008 Analog Devices, Inc. All rights reserved. AD8622 AD8622 SPECIFICATIONS ELECTRICAL SPECIFICATIONS VS = 5.0 V, VCM = 0 V, VO = 0 V, TA = +25C, unless otherwise specified. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol VOS Conditions Grade B Grade A -40C TA +85C -40C TA +125C -40C TA +85C -40C TA +125C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio IOS -40C TA +125C Preliminary Technical Data Min Typ 10 Max 50 100 Unit V V V V pA pA pA pA V dB dB V/mV V/mV V/mV V/mV V/mV V/mV V/mV V/mV V/C V/C V V V V mA mA dB dB A A A V/s kHz V p-p nV/Hz pA/Hz Input Bias Current IB 20 200 300 10 -4 4 120 CMRR Open Loop Gain AVO Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Limit Output Current POWER SUPPLY Power Supply Rejection Ratio VOS/T VCM = -3.8 V to +3.8 V -40C TA +85C -40C TA +125C RL = 10 k to ground, VO = -4.0 V to +4.0 V -40C TA +85C -40C TA +125C RL = 2 k to ground, VO = -4.0 V to +4.0 V -40C TA +85C -40C TA +125C -40C TA +85C -40C TA +125C 1mA to ground -40C TA +125C 1mA to ground -40C TA +125C 1000 500 700 1250 0.2 0.2 4.8 -4.8 -4.91 20 10 0.6 0.6 VOH VOL ISC IO PSRR Supply Current/Amplifier ISY VS = 2.0 V to 18.0 V -40C TA +85C -40C TA +125C VO = 0 V -40C TA +85C -40C TA +125C RL = 2 k 120 200 330 0.4 600 tbd 12 tbd DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product NOISE PERFORMANCE Voltage Noise Voltage Noise Density Current Noise Density SR GBP en p-p en in 0.1 Hz to 10 Hz f = 1 kHz f = 10 Hz Rev. 0 | Page 2 of 4 Preliminary Technical Data AD8622 SPECIFICATIONS VS = 15 V, VCM = 0 V, VO = 0 V, TA = +25C, unless otherwise specified. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Symbol VOS Conditions Grade B Grade A -40C TA +85C -40C TA +125C -40C TA +85C -40C TA +125C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio IOS -40C TA +125C -14.0 CMRR VCM = -13.5 V to 13.5 V -40C TA +85C -40C TA +125C RL = 2 k to ground, VO = -13.5 V to 13.5 V -40C TA +85C -40C TA +125C RL = 10 k to ground, VO = -13.5 V to 13.5 V -40C TA +85C -40C TA +125C -40C TA +85C -40C TA +125C RL = 1mA to ground -40C TA +125C RL = 2 k to ground -40C TA +125C 120 14.0 10 Min Typ 10 Max 50 100 AD8622 Units V V V V pA pA pA pA nA V dB dB V/mV V/mV V/mV V/mV V/mV V/mV V/C V/C V V V V mA mA dB dB A A A V/s kHz Vp-p nV/Hz pA/Hz Input Bias Current IB 20 200 300 Open Loop Gain AVO 3000 3000 Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High Output Voltage Low Short-Circuit Limit Output Current POWER SUPPLY Power Supply Rejection Ratio VOS/T 0.2 0.2 14.8 -14.8 25 10 0.6 0.6 VOH VOL ISC IO PSRR Supply Current/Amplifier ISY VS = 2.0 V to 18.0 V -40C TA +85C -40C TA +125C VO = 0 V -40C TA +85C -40C TA +125C RL =10 k 120 210 330 0.45 600 tbd 12 tbd DYNAMIC PERFORMANCE Slew Rate Gain Bandwidth Product NOISE PERFORMANCE Voltage Noise Voltage Noise Density Current Noise Density SR GBP en p-p en in 0.1 Hz to 10 Hz f = 1 kHz f = 10 Hz Rev. 0 | Page 3 of 4 AD8622 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit Duration to GND Storage Temperature Range RM, R Packages Operating Temperature Range Junction Temperature Range RM, R Packages Lead Temperature Range (Soldering, 10 sec) Rating 18 V V supply 0.7 V Indefinite -65C to +150C -40C to +125C -65C to +150C +300C Preliminary Technical Data 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 8-Lead MSOP (RM) 8-Lead SOIC_N (R) JA 210 158 JC 45 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 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. Rev. 0 | Page 4 of 4 PR07527-0-7/08(PrA) |
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