16V, 250 A Low Power, Low Noise Dual Precision CMOS Rail-to-Rail Output Operational Amplifiers AD8667 Preliminary Technical Data FEATURES Lower Power at High voltage: 250 μA typ Low Offset Voltage: 100 μV Voltage Noise: 20 nV/√Hz Low Input Bias Currents 1pA Max PIN CONFIGURATIONS 8-Lead MSOP (RM-8) 04 Single-Supply Operation: 5 to 16 Volts Dual-Supply Operation: +/- 2.5 to +/-8 Volts Output drive: 10mA Unity Gain Stable AD8667 APPLICATIONS Medical Equipment Physiological Measurement Precision References Buffer / Level Shifting Portable Operated Systems High density Power Budget Systems Multi-pole Filters Sensors Photodiode amplification ADC driver 8-Lead SO (R-8) AD8667 04 GENERAL DESCRIPTION The AD8667 is a dual rail-to-rail output single supply and dual supply amplifiers that use Analog Devices’ patented DigiTrim® trimming technique to achieve low offset voltage, 300μV over the common mode range. The AD8667 family features an extended operating range with supply voltages up to 16 V for low power operation with ISY of < 325 μΑ over the extended industrial temperature. These devices are designed for low noise at higher voltages, 20 nV/√Hz at 10 kHz and 23 nV/√Hz at 1 kHz. They also feature low input bias currents of 1pA and 10mA output drive. The combination of low supply currents, low offsets, very low input bias currents, and wide supply range make these amplifiers useful in a wide variety of low power applications. Systems utilizing DC to low frequency measurements, or high impedance sensors, such as photo-diodes benefit from the combination of low input bias current, low noise, low offset and drive current. The wide operating voltage range matches today’s high performance ADCs and DACs. Medical monitoring equipment can take advantage of the low voltage noise, high input impedance, low voltage and current noise,. The AD8667 is specified over the extended industrial (-40° to +125°C) 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. 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 companies. 08/31/2006 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2006 Analog Devices, Inc. All rights reserved. AD8667 Preliminary Technical Data ELECTRICAL CHARACTERISTICS (VS=+5.0V, VCM = VS/2, TA=+25°C unless otherwise noted) Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions VOS VSY = 8V, VCM = 3V Min VCM = - 0.1V to 3.0V -40°< TA < +85°C Typ 30 -40°< TA < +125°C Input Bias Current Input Offset Current IB 0.3 Max Units 100 μV 300 650 μV μV 750 μV 1 pA -40°< TA < +85°C 50 pA -40°< TA < +125°C 300 pA IOS 0.2 pA -40°< TA < +85°C 20 pA -40°< TA < +125°C 75 pA 3 V dB Input Voltage Range Common-Mode Rejection Ratio IVR CMRR VCM = -0.1V to 3.0V -0.1 80 95 Large Signal Voltage Gain AVO RL = 2 kΩ VO= 0.5V to 4.5V 70 85 V/mV Offset Voltage Drift ΔVOS/ΔT 4 μV/°C OUTPUT CHARACTERISTICS Output Voltage High VOH IL = 1mA -40°C < TA < +125°C Output Voltage Low VOL 4.8 V 4.6 IL = 1mA V 200 -40°C < TA < +125°C mV 250 ±5 100 mV Short Circuit Current ISC Closed Loop Output Impedance ZOUT f=100kHz, AV = 1 POWER SUPPLY Power Supply Rejection Ratio PSRR VS = 5 V to 16 V 95 dB Supply Current/Amplifier ISY VO = 0V 250 μA -40°< TA < +125°C 325 μA 0.2 DYNAMIC PERFORMANCE Slew Rate SR RL =2 kΩ Settling Time ts To 0.1%, 0 V to 1V step Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density GBP Øo en p-p en Voltage Noise Density en f=1kHz Current Noise Density in f=1kHz 80 mA Ω V/μs μs 550 60 kHz degrees f=0.1Hz to 10 Hz 3.5 f=10kHz 20 μV p-p nV/√Hz 23 nV/√Hz Rev. PrA | Page 2 of 4 pA/√Hz Preliminary Technical Data AD8667 ELECTRICAL CHARACTERISTICS (VS=16V, VCM = VS/2, TA=+25°C unless otherwise noted) Parameter INPUT CHARACTERISTICS Offset Voltage Symbol Conditions VOS VSY = 8V, VCM = 3V Min VCM = -0.1V to +14.0V -40°< TA < +85°C Typ 30 -40°< TA < +125°C Input Bias Current Input Offset Current IB IVR CMRR AVO Offset Voltage Drift ΔVOS/ΔT OUTPUT CHARACTERISTICS Output Voltage High VOH VOL Units 100 μV 300 650 μV μV 750 μV 1 pA -40°< TA < +85°C 50 pA -40°< TA < +125°C 300 pA IOS Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Output Voltage Low 0.3 Max 0.2 pA -40°< TA < +85°C 20 pA -40°< TA < +125°C 75 pA 14 95 85 V dB V/mV 3 μV/°C VCM = -0.1V to +14.0V RL=2 kΩ VO= 0.5V to+15.5V -0.1 80 70 IL = 1mA 15.8 15.9 IL = 10mA -40°C < TA < +125°C 15 15.2 V V 14.7 V IL = 1mA 51 IL = 10mA -40°C < TA < +125°C 550 80 mV mV 900 mV ±10 100 mA Short Circuit Current ISC Closed Loop Output Impedance ZOUT f=100 kHz, AV = 1 POWER SUPPLY Power Supply Rejection Ratio PSRR VS = 5V to 16V 95 dB Supply Current/Amplifier ISY VO = 0V 250 μA -40°< TA < +125°C 325 μA 0.3 DYNAMIC PERFORMANCE Slew Rate SR RL =2 kΩ Settling Time ts To 0.1%, 0 V to 1V step Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density GBP Øo Voltage Noise Density en Current Noise Density in en p-p en 80 V/μs μs 550 60 kHz degrees μV p-p nV/√Hz f=0.1Hz to 10 Hz 3.5 f=1kHz 23 f=10kHz f=1kHz 20 Rev. PrA | Page 3 of 4 Ω nV/√Hz pA/√Hz AD8667 Preliminary Technical Data PR06276-0-9/06(PrA) Notes Rev. PrA | Page 4 of 4