AD8698ARM-R2

Dual Precision, Rail-to-Rail Output Operational Amplifier AD8698 FEATURES CONNECTION DIAGRAMS OUT A 1 –IN A 2 +IN A 3 AD8698 8-Lead MSOP (RM-8) 8 V+ 7 OUT B 6 –IN B TOP VIEW V– 4 (Not to Scale) 5 +IN B OUT A 1 –IN A 2 +IN A 3 AD8698 8 V+ 7 OUT B 6 –IN B TOP VIEW V– 4 (Not to Scale) 5 +IN B 04807-0-070 8-Lead SOIC (R-8) 04807-0-069 Low offset voltage: 100 µV max Low offset voltage drift: 2 µV/°C max Low input bias current: 700 pA max Low noise: 8 nV/√Hz High common-mode rejection: 118 dB min Wide operating temperature: −40°C to +85°C No phase reversal Figure 1. APPLICATIONS Photodiode amplifier Sensors and controls Multipole filters Integrator GENERAL DESCRIPTION The AD8698 is a high precision, rail-to-rail output, low noise, low input bias current operational amplifier. Offset voltage is a respectable 100 µV max and drift over temperature is below 2 µV/°C, eliminating the need for manual offset trimming. The AD8698 is ideal for high impedance sensors, minimizing offset errors due to input bias and offset currents. The rail-to-rail output maximizes dynamic range in a variety of applications, such as photodiode amplifiers, DAC I/V amplifiers, filters, and ADC input amplifiers. The AD8698 dual amplifiers are offered in 8-lead MSOP and narrow 8-lead SOIC packages. The MSOP version is available in tape and reel only. Rev. 0 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: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. AD8698 TABLE OF CONTENTS Specifications .................................................................................... 3 Instrumentation Amplifier ....................................................... 15 Absolute Maximum Ratings ........................................................... 5 Composite Amplifier ................................................................. 15 Thermal Resistance ...................................................................... 5 Low Noise Applications ............................................................ 16 ESD Caution.................................................................................. 5 Driving ADCs ............................................................................. 16 Typical Performance Characteristics............................................. 6 Using the AD8698 in Active Filter Designs ........................... 16 Applications .................................................................................... 14 Outline Dimensions....................................................................... 17 Input Overvoltage Protection................................................... 14 Ordering Guide .......................................................................... 17 Driving Capacitive Loads .......................................................... 14 REVISION HISTORY 4/04—Revision 0: Initial Version Rev. 0 | Page 2 of 20 AD8698 SPECIFICATIONS VS = ±15 V, VCM = 0 V (@TA = 25oC, unless otherwise noted.) Table 1. Parameter Symbol Conditions Min Typ Max Unit 20 100 300 µV µV INPUT CHARACTERISTICS Offset Voltage VOS Offset Voltage Drift Input Bias Current ∆VOS/∆T IB Input Offset Current IOS Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Input Capacitance IVR CMRR AVO CDIFF CCM −40°C < TA < +85°C −40°C < TA < +85°C 0.6 −40°C < TA < +85°C OUTPUT CHARACTERISTICS Output Voltage Swing (Ref. to GND) (Ref. to GND) POWER SUPPLY Power Supply Rejection Ratio Supply Current Supply Voltage DYNAMIC PERFORMANCE Slew Rate 132 1450 6.5 4.6 VOH IL = 1 mA, −40°C < TA < +85°C 14.85 14.93 V IL = 5 mA, −40°C < TA < +85°C 14.6 14.8 V VOL IL = 1 mA, −40°C < TA < +85°C −14.93 −14.6 V VOL IL = 5 mA, −40°C < TA < +85°C −14.82 −14.5 V PSRR ISY ±2.5 V < VS < ±15 V VO = 0 V VS −40°C < TA < +85°C −40°C < TA < +85°C 3.2 3.8 ±15 dB mA mA V SR RL = 2 kΩ GBP Phase Margin ØO Input Voltage Noise Density RL = 2 kΩ, VO = ±13.5 V −13.5V 118 900 µV/°C pA pA pA pA V dB V/mV pF pF VOH Gain Bandwidth Product NOISE PERFORMANCE Input Noise Voltage −40°C < TA < +85°C −40°C < TA < +85°C VCM = ±13.5 V 2 700 1500 700 1500 13.5 114 132 2.8 ±2.5 0.4 V/µs 1 MHz 60 Degrees en p-p 0.1 Hz < f < 10 Hz 0.6 µV p-p en f = 10 Hz 15 nV/√Hz Input Voltage Noise Density en f = 1 kHz 8 nV/√Hz Current Noise Density in f = 1 kHz 0.2 pA/√Hz Rev. 0 | Page 3 of 20 AD8698 VS = ±2.5 V, VCM = 0 V (@TA = 25oC, unless otherwise noted.) Table 2. Parameter Symbol Conditions Min Typ Max Unit 20 100 µV INPUT CHARACTERISTICS Offset Voltage VOS Offset Voltage Drift Input Bias Current ∆VOS/∆T IB Input Offset Current IOS −40°C < TA < +85°C 300 µV −40°C < TA < +85°C 2 µV/°C 700 1500 700 1500 +1.5 120 1200 6.4 4.6 pA pA pA pA V dB V/mV pF pF 2.44 2.29 V V −40°C < TA < +85°C Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Input Capacitance OUTPUT CHARACTERISTICS Output Voltage Swing (Ref. to GND) (Ref. to GND) IVR CMRR AVO CDIFF CCM VOH VOH −40°C < TA < +85°C −40°C < TA < +85°C VCM = ±13.5 V RL = 2 kΩ, VO = ±13.5 V −1.5 105 600 IL = 1 mA, −40°C < TA < +85°C IL = 5 mA, −40°C < TA < +85°C 2.35 2.1 VOL IL = 1 mA, −40°C < TA < +85°C −2.43 −2.2 V VOL IL = 5 mA, TA = 25°C −2.15 −1.9 V IL= 5mA, −40°C