FEATURES Very low voltage noise 2.8 nv/ Hz @ khz Rail-to-rail output swing Low input bias current: 2 na maximum Very low offset voltage: 2 μv typical Low input offset drift:.6 μv/ C maximum Very high gain: 2 db Wide bandwidth: MHz typical ±5 V to ±8 V operation APPLICATIONS Precision instrumentation PLL filters Laser diode control loops Strain gage amplifiers Medical instrumentation Thermocouple amplifiers Ultraprecision, 36 V, 2.8 nv/ Hz Dual Rail-to-Rail Output Op Amp PIN CONFIGURATIONS OUT A IN A 2 +IN A 3 V 4 TOP VIEW (Not to Scale) 8 V+ 7 OUT B 6 IN B 5 +IN B Figure. 8-Lead SOIC_N (R-8) OUT A IN A 2 +IN A 3 V 4 TOP VIEW (Not to Scale) 8 V+ 7 OUT B 6 IN B 5 +IN B Figure 2. 8-Lead MSOP (RM-8) 6487-6487-2 GENERAL DESCRIPTION The precision operational amplifier offers ultralow offset, drift, and voltage noise combined with very low input bias currents over the full operating temperature range. The is a precision, wide bandwidth op amp featuring railto-rail output swings and very low noise. Operation is fully specified from ±5 V to ±5 V. The features a rail-to-rail output like that of the OP84, but with wide bandwidth and even lower voltage noise, combined with the precision and low power consumption like that of the industry-standard OP7 amplifier. Unlike other low noise, rail-to-rail op amps, the has very low input bias current and low input current noise. With typical offset voltage of only 2 μv, offset drift of.2 μv/ C, and noise of only. μv p-p (. Hz to Hz), the is perfectly suited for applications where large error sources cannot be tolerated. Precision instrumentation, PLL and other precision filter circuits, position and pressure sensors, medical instrumentation, and strain gage amplifiers benefit greatly from the very low noise, low input bias current, and wide bandwidth. Many systems can take advantage of the low noise, dc precision, and rail-to-rail output swing provided by the to maximize SNR and dynamic range. The smaller packages and low power consumption afforded by the allow maximum channel density or minimum board size for space-critical equipment. The is specified for the extended industrial temperature range ( 4 C to +25 C). The is available in the 8-lead MSOP, and the popular 8-lead, narrow SOIC; both of which are lead-free packages. MSOP packaged devices are only available in tape and reel format. For the single version of this ultraprecision, rail-to-rail op amp, see the AD8675 data sheet. The AD8675 and are members of a growing series of low noise op amps offered by Analog Devices, Inc. Table. Voltage Noise Package.9 nv. nv.8 nv 2.8 nv 3.8 nv Single AD797 AD8597 ADA44- AD8675 AD867 Dual AD8599 ADA44-2 AD8672 Quad ADA44-4 AD8674 Rev. C 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 96, Norwood, MA 262-96, U.S.A. Tel: 78.329.47 www.analog.com Fax: 78.46.33 26 2 Analog Devices, Inc. All rights reserved.
TABLE OF CONTENTS Features... Applications... Pin Configurations... General Description... Revision History... 2 Specifications... 3 Electrical Specifications... 3 Absolute Maximum Ratings...5 Thermal Resistance...5 Power Sequencing...5 ESD Caution...5 Typical Performance Characteristics...6 Outline Dimensions... Ordering Guide... REVISION HISTORY 8/ Rev. B to Rev. C Change to Y-Axis Label, Figure 9... 7 /9 Rev. A to Rev. B Changes to General Description Section... Added Table ; Renumbered Sequentially... Updated Outline Dimensions... Changes to Ordering Guide... 4/8 Rev. to Rev. A Changes to Table... 3 Changes to Table 2... 4 Changes to Figure 6, Figure 7, Figure 8... 6 Changes to Figure 9 through Figure 2... 7 Changes to Figure 2, Figure 22, and Figure 25... 9 Added Figure 26, Renumbered Sequentially... 9 Changes to Figure 27... Added Figure 28, Renumbered Sequentially... /6 Revision : Initial Version Rev. C Page 2 of 2
SPECIFICATIONS ELECTRICAL SPECIFICATIONS VS = ±5. V, VCM = V, VO = V, TA = +25 C, unless otherwise specified. Table 2. Parameter Symbol Conditions Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage VOS B Grade (SOIC) 2 μv B Grade (MSOP) 6 μv A Grade (SOIC, MSOP) μv Offset Voltage VOS 4 C TA +25 C B Grade (SOIC, MSOP) 5 6 μv A Grade (SOIC, MSOP) 2 μv Input Bias Current IB 2 +2 na 4 C TA +25 C 5.5 +5.5 na Input Offset Current IOS + na 4 C TA +25 C 2.8 +2.8 na Input Voltage Range 3. +3. V Common-Mode Rejection Ratio CMRR VCM = 3. V to +3. V 5 3 db 4 C TA +25 C 5 db Open-Loop Gain AVO RL = 2 kω to ground, 2 26 db VO = 3.5 V to +3.5 V 4 C TA +25 C 7 db Offset Voltage Drift ΔVOS/ΔT 4 C TA +25 C.2.6 μv/ C OUTPUT CHARACTERISTICS Output Voltage High VOH RL = kω to ground +4.9 +4.95 V 4 C TA +25 C +4.85 V RL = 2 kω to ground +4.8 +4.89 V 4 C TA +25 C +4.75 V Output Voltage Low VOL RL = kω to ground 4.98 4.9 V 4 C TA +25 C 4.85 V RL = 2 kω to ground 4.9 4.86 V 4 C TA +25 C 4.82 V Short-Circuit Limit ISC +4 ma Output Current IO ±2 ma POWER SUPPLY Power Supply Rejection Ratio PSRR VS = ±5. V to ±5. V 6 2 db 4 C TA +25 C 6 2 db Supply Current/Amplifier ISY VO = V 2.5 3.2 ma 4 C TA +25 C 3.8 ma DYNAMIC PERFORMANCE Slew Rate SR RL = 2 kω 2.5 V/μs Gain Bandwidth Product GBP MHz NOISE PERFORMANCE Voltage Noise en p-p. Hz to Hz. μv p-p Voltage Noise Density en f = khz 2.8 nv/ Hz Current Noise Density in f = Hz.3 pa/ Hz Rev. C Page 3 of 2
VS = ±5 V, VCM = V, VO = V, TA = +25 C, unless otherwise specified. Table 3. Parameter Symbol Conditions Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage VOS B Grade (SOIC) 2 μv B Grade (MSOP) 6 μv A Grade (SOIC, MSOP) μv Offset Voltage VOS 4 C TA +25 C B Grade (SOIC, MSOP) 5 6 μv A Grade (SOIC, MSOP) 2 μv Input Bias Current IB 2 +2 na 4 C TA +25 C 4.5 +4.5 na Input Offset Current IOS + na 4 C TA +25 C 2.8 +2.8 na Input Voltage Range 2.5 +2.5 V Common-Mode Rejection Ratio CMRR VCM = 2.5 V to +2.5 V 3 db 4 C TA +25 C 7 3 db Open-Loop Gain AVO RL = 2 kω to ground, 23 32 db VO = 3.5 V to +3.5 V 4 C TA +25 C 7 db Offset Voltage Drift ΔVOS/ΔT 4 C TA +25 C.2.6 μv/ C OUTPUT CHARACTERISTICS Output Voltage High VOH RL = kω to ground +4.85 +4.92 V 4 C TA +25 C +4.8 V RL = 2 kω to ground +4.6 +4.75 V 4 C TA +25 C +4.4 V Output Voltage Low VOL RL = kω to ground 4.96 4.94 V 4 C TA +25 C 4.9 V RL = 2 kω to ground 4.85 4.75 V 4 C TA +25 C 4.6 V Short-Circuit Limit ISC +4 ma Output Current IO ±2 ma POWER SUPPLY Power Supply Rejection Ratio PSRR VS = ±5. V to ±5. V 6 2 db 4 C TA +25 C 6 db Supply Current/Amplifier ISY VO = V 2.7 3.4 ma 4 C TA +25 C 4.2 ma DYNAMIC PERFORMANCE Slew Rate SR RL = kω 2.5 V/μs Gain Bandwidth Product GBP MHz NOISE PERFORMANCE Voltage Noise en p-p. Hz to Hz. μv p-p Voltage Noise Density en f = khz 2.8 nv/ Hz Current Noise Density in f = Hz.3 pa/ Hz Rev. C Page 4 of 2
ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Rating Supply Voltage ±8 V Input Voltage ±V supply Differential Input Voltage ±.7 V Output Short-Circuit Duration to GND Indefinite Storage Temperature Range RM, R Packages 65 C to + C Operating Temperature Range 4 C to +25 C Junction Temperature Range RM, R Packages 65 C to + C Lead Temperature Range (Soldering, sec) 3 C 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 5. Thermal Resistance Package Type θja θjc Unit 8-Lead MSOP (RM) 2 45 C/W 8-Lead SOIC_N (R) 58 43 C/W POWER SEQUENCING The op amp supplies must be established simultaneously with, or before, any input signals are applied. If this is not possible, the input current must be limited to ma. ESD CAUTION Rev. C Page 5 of 2
TYPICAL PERFORMANCE CHARACTERISTICS ±5 V and ±5 V, TA = 25 C, unless otherwise specified. VOLTAGE NOISE DENSITY (nv/ Hz) 9 8 7 6 5 4 3 2 V OS (µv) TYPICAL V S = ±5V k k k FREQUENCY (Hz) Figure 3. Voltage Noise Density vs. Frequency 6487-3 4 2 2 4 6 8 2 Figure 6. Offset Voltage vs. Temperature 6487-6 9 3 8 3 7 NUMBER OF AMPLIFIERS 6 4 3 2 NUMBER OF AMPLIFIERS 2 2 8 6 4 2 2 4 6 8 V OS (µv) 6487-4 2..6.2.8.4.4 I B (na).8.2.6 2. 6487-7 Figure 4. Input Offset Voltage Distribution Figure 7. Input Bias Current, VSY = ±5 V 25 3 2 3 NUMBER OF AMPLIFIERS 5 NUMBER OF AMPLIFIERS 2 2 5.5..5.2.25.3.35.4.45..55 T C V OS (µv/ C).6.65.7.75.8.85.9.95. 6487-5 2..6.2.8.4.4 I B (na).8.2.6 2. 6487-8 Figure 5. TCVOS Distribution Figure 8. Input Bias Current, VSY = ±5 V Rev. C Page 6 of 2
±5 V and ±5 V, TA = 25 C, unless otherwise specified. I B (na) 5 4 3 2 2 3 4 V S = ±5V V S = ±5V GAIN (db) 2 8 6 4 2 2 4 6 8 GAIN PHASE C L = 35pF θ M = 55.2 8 35 9 45 45 9 35 PHASE MARGIN (Degrees) 5 4 2 2 4 6 8 2 Figure 9. Input Bias Current vs. Temperature 6487-9 2 k k k M M FREQUENCY (Hz) Figure 2. Gain and Phase vs. Frequency 8 M 6487-2 3. 6 SUPPLY CURRENT (ma) 2.5 2..5. CLOSED-LOOP GAIN (db) 4 3 2 G = G = G =.5 2 3 5 5 2 25 SUPPLY VOLTAGE (V) Figure. Supply Current vs. Total Supply Voltage 3 35 6487-4 k k k M M M FREQUENCY (Hz) Figure 3. Closed-Loop Gain vs. Frequency 6487-3 4. 7 SUPPLY CURRENT (ma) 3.5 3. 2.5 2..5. V S = ±5V V S = ±5V Z OUT (Ω) 6 4 3 2 A VO = A VO = A VO =.5 4 2 2 4 6 8 2 Figure. Supply Current vs. Temperature 6487- k k k M M M FREQUENCY (Hz) Figure 4. ZOUT vs. Frequency 6487-4 Rev. C Page 7 of 2
±5 V and ±5 V, TA = 25 C, unless otherwise specified. 5 V IN = ±V A V = +. V IN 4 VOLTAGE (V) 5 5 INPUT VOLTAGE (V)..2.3.4.5 V OUT 3 2 OUTPUT VOLTAGE (V) 5 TIME (µs/div) Figure 5. Large Signal Transient Response, VSY = ±5 V 6487-5.6 V IN = 2mV p-p A VO = R L = kω 2.7 3 4 6 6 2 26 3 36 TIME (µs) Figure 8. Positive Overvoltage Recovery 6487-8 4 3 V IN = ±3.5V A V = +.3.2 V IN = 2mV p-p A VO = R L = kω 4 VOLTAGE (V) 2 2 INPUT VOLTAGE (V)...2.3 V IN V OUT 3 2 OUTPUT VOLTAGE (V) 3.4 2 4 TIME (µs/div) Figure 6. Large Signal Transient Response, VSY = ±5 V 6487-6.5 4 6 6 2 26 3 3 36 TIME (µs) Figure 9. Negative Overvoltage Recovery 6487-9 7 6 A V = + V IN = mv p-p 8 6 4 2 OVERSHOOT (%) 4 3 2 +OS OS CMRR (db) 8 6 4 2 k k k CAPACITANCE (pf) Figure 7. Small Signal Overshoot vs. Load Capacitance 6487-7 2 k k k M M FREQUENCY (Hz) Figure 2. CMRR vs. Frequency M 6487-2 Rev. C Page 8 of 2
±5 V and ±5 V, TA = 25 C, unless otherwise specified. 6 POWER SUPPLY REJECTION RATIO (db) 4 2 8 6 4 2 +PSRR PSRR V S V OUT (mv) SOURCE SINK 2 k k k M M FREQUENCY (Hz) Figure 2. Power Supply Rejection Ratio vs. Frequency M 6487-2... LOAD CURRENT (ma) Figure 24. Output Saturation Voltage vs. Output Load Current 6487-24 POWER SUPPLY REJECTION RATIO (db) 26 24 22 2 8 6 4 HIGH OUTPUT VOLTAGE (V) 5. 4.9 4.8 4.7 4.6 4.5 V S = ±5V 2 4 2 2 4 6 8 2 Figure 22. Power Supply Rejection Ratio vs. Temperature 6487-22 4.4 4 2 2 4 6 8 2 Figure 25. High Output Voltage, VOH vs. Temperature, VS = ±5 V 6487-25 NOISE (µv).6.4.2.2.4 HIGH OUTPUT VOLTAGE (V) 5. 4.95 4.9 4.85 4.8 V S = ±5V.6 2 3 4 5 6 7 8 9 TIME (s) Figure 23. Voltage Noise (. Hz to Hz) 6487-23 4.75 4 2 2 4 6 8 2 Figure 26. High Output Voltage, VOH vs. Temperature, VS = ±5 V 6487-225 Rev. C Page 9 of 2
±5 V and ±5 V, TA = 25 C, unless otherwise specified. 4.7 4.75 V S = ±5V 4.93 4.94 V S = ±5V LOW OUTPUT VOLTAGE (V) 4.8 4.85 4.9 LOW OUTPUT VOLTAGE (V) 4.95 4.96 4.97 4.98 4.95 4.99 5. 4 2 2 4 6 8 2 Figure 27. Low Output Voltage, VOL vs. Temperature, VS = ±5 V 6487-26 5. 4 2 2 4 6 8 2 Figure 28. Low Output Voltage, VOL vs. Temperature, VS = ±5 V 6487-226 Rev. C Page of 2
OUTLINE DIMENSIONS 5. (.968) 4.8 (.89) 4. (.574) 3.8 (.497) 8 5 4 6.2 (.244) 5.8 (.2284).25 (.98). (.4) COPLANARITY. SEATING PLANE.27 (.) BSC.75 (.688).35 (.532).5 (.2).3 (.22) 8.25 (.98).7 (.67). (.96).25 (.99).27 (.).4 (.57) 45 COMPLIANT TO JEDEC STANDARDS MS-2-AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. Figure 29. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) 247-A 3.2 3. 2.8 3.2 3. 2.8 8 5 4 5.5 4.9 4.65 PIN IDENTIFIER.65 BSC.95.85.75.5.5 COPLANARITY..4.25. MAX 6 5 MAX.23.9 COMPLIANT TO JEDEC STANDARDS MO-87-AA Figure 3. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters.8.55.4 79-B ORDERING GUIDE Model Temperature Range Package Description Package Option Branding ARMZ 4 C to +25 C 8-Lead Mini Small Outline Package [MSOP] RM-8 A3 ARMZ-REEL 4 C to +25 C 8-Lead Mini Small Outline Package [MSOP] RM-8 A3 ARZ 4 C to +25 C 8-Lead Standard Small Outline Package [SOIC_N] R-8 ARZ-REEL 4 C to +25 C 8-Lead Standard Small Outline Package [SOIC_N] R-8 ARZ-REEL7 4 C to +25 C 8-Lead Standard Small Outline Package [SOIC_N] R-8 BRMZ 4 C to +25 C 8-Lead Mini Small Outline Package [MSOP] RM-8 AL BRMZ-REEL 4 C to +25 C 8-Lead Mini Small Outline Package [MSOP] RM-8 AL BRZ 4 C to +25 C 8-Lead Standard Small Outline Package [SOIC_N] R-8 BRZ-REEL 4 C to +25 C 8-Lead Standard Small Outline Package [SOIC_N] R-8 BRZ-REEL7 4 C to +25 C 8-Lead Standard Small Outline Package [SOIC_N] R-8 Z = RoHs Compliant Part. Rev. C Page of 2
NOTES 26 2 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D6487--8/(C) Rev. C Page 2 of 2