Ultraprecision, 36 V, 2.8 nv/ Hz Dual Rail-to-Rail Output Op Amp AD8676

Transcription

1 Ultraprecision, 36 V, 2. nv/ Hz Dual Rail-to-Rail Output Op Amp AD676 FEATURES Very low voltage noise: 2. nv/ khz Rail-to-rail output swing Low input bias current: 2 na maximum Very low offset voltage: 2 μv typical Low input offset drift: 0.6 μv/ C maximum Very high gain: 20 db Wide bandwidth: 0 MHz typical ± V to ± V operation APPLICATIONS Precision instrumentation PLL filters Laser diode control loops Strain gage amplifiers Medical instrumentation Thermocouple amplifiers PIN CONFIGURATIONS OUT A IN A 2 +IN A 3 V 4 AD676 TOP VIEW (Not to Scale) 7 6 V+ OUT B IN B +IN B Figure. -Lead SOIC_N (R-) OUT A IN A 2 +IN A 3 V 4 AD676 TOP VIEW (Not to Scale) 7 6 V+ OUT B IN B +IN B Figure 2. -Lead MSOP (RM-) GENERAL DESCRIPTION The AD676 precision operational amplifier offers ultralow offset, drift, and voltage noise combined with very low input bias currents over the full operating temperature range. The AD676 is a precision, wide bandwidth op amp featuring railto-rail output swings and very low noise. Operation is fully specified from ± V to ± V. The AD676 features a rail-to-rail output like that of the OP4, but with wide bandwidth and even lower voltage noise, combined with the precision and low power consumption like that of the industry-standard OP07 amplifier. Unlike other low noise, rail-to-rail op amps, the AD676 has very low input bias current and low input current noise. With typical offset voltage of only 2 μv, offset drift of 0.2 μv/ C, and noise of only 0.0 μv p-p (0. Hz to 0 Hz), the AD676 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 AD676 to maximize SNR and dynamic range. The smaller packages and low power consumption afforded by the AD676 allow maximum channel density or minimum board size for space-critical equipment. The AD676 is specified for the extended industrial temperature range ( 40 C to +2 C). The AD676 is available in the -lead MSOP, and the popular -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 AD67 data sheet. 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 Analog Devices, Inc. All rights reserved.

2 SPECIFICATIONS ELECTRICAL SPECIFICATIONS VS = ±.0 V, VCM = 0 V, VO = 0 V, TA = +2 C, unless otherwise specified. Table. Parameter Symbol Conditions Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage VOS B Grade (SOIC) 2 0 μv B Grade (MSOP) 60 μv A Grade (SOIC, MSOP) 00 μv Offset Voltage VOS 40 C TA +2 C B Grade (SOIC, MSOP) 60 μv A Grade (SOIC, MSOP) 20 μv Input Bias Current IB 2 +2 na 40 C TA +2 C. +. na Input Offset Current IOS + na 40 C TA +2 C na Input Voltage Range V Common-Mode Rejection Ratio CMRR VCM = 3.0 V to +3.0 V 0 30 db 40 C TA +2 C 0 db Open-Loop Gain AVO RL = 2 kω to ground, db VO = 3. V to +3. V 40 C TA +2 C 7 db Offset Voltage Drift ΔVOS/ΔT 40 C TA +2 C μv/ C OUTPUT CHARACTERISTICS Output Voltage High VOH RL = 0 kω to ground V 40 C TA +2 C +4. V RL = 2 kω to ground V 40 C TA +2 C +4.7 V Output Voltage Low VOL RL = 0 kω to ground V 40 C TA +2 C 4. V RL = 2 kω to ground V 40 C TA +2 C 4.2 V Short-Circuit Limit ISC +40 ma Output Current IO ±20 ma POWER SUPPLY Power Supply Rejection Ratio PSRR VS = ±.0 V to ±.0 V db 40 C TA +2 C db Supply Current/Amplifier ISY VO = 0 V ma 40 C TA +2 C 3. ma DYNAMIC PERFORMANCE Slew Rate SR RL = 2 kω 2. V/μs Gain Bandwidth Product GBP 0 MHz NOISE PERFORMANCE Voltage Noise en p-p 0. Hz to 0 Hz 0. μv p-p Voltage Noise Density en f = khz 2. nv/ Hz Current Noise Density in f = 0 Hz 0.3 pa/ Hz Rev. A Page 3 of 2

3 VS = ± V, VCM = 0 V, VO = 0 V, TA = +2 C, unless otherwise specified. Table 2. Parameter Symbol Conditions Min Typ Max Unit INPUT CHARACTERISTICS Offset Voltage VOS B Grade (SOIC) 2 0 μv B Grade (MSOP) 60 μv A Grade (SOIC, MSOP) 00 μv Offset Voltage VOS 40 C TA +2 C B Grade (SOIC, MSOP) 60 μv A Grade (SOIC, MSOP) 20 μv Input Bias Current IB 2 +2 na 40 C TA +2 C na Input Offset Current IOS + na 40 C TA +2 C na Input Voltage Range V Common-Mode Rejection Ratio CMRR VCM = 2. V to +2. V 30 db 40 C TA +2 C db Open-Loop Gain AVO RL = 2 kω to ground, db VO = 3. V to +3. V 40 C TA +2 C 7 db Offset Voltage Drift ΔVOS/ΔT 40 C TA +2 C μv/ C OUTPUT CHARACTERISTICS Output Voltage High VOH RL = 0 kω to ground V 40 C TA +2 C +4.0 V RL = 2 kω to ground V 40 C TA +2 C V Output Voltage Low VOL RL = 0 kω to ground V 40 C TA +2 C 4.90 V RL = 2 kω to ground V 40 C TA +2 C 4.60 V Short-Circuit Limit ISC +40 ma Output Current IO ±20 ma POWER SUPPLY Power Supply Rejection Ratio PSRR VS = ±.0 V to ±.0 V db 40 C TA +2 C 06 db Supply Current/Amplifier ISY VO = 0 V ma 40 C TA +2 C 4.2 ma DYNAMIC PERFORMANCE Slew Rate SR RL =0 kω 2. V/μs Gain Bandwidth Product GBP 0 MHz NOISE PERFORMANCE Voltage Noise en p-p 0. Hz to 0 Hz 0. μv p-p Voltage Noise Density en f = khz 2. nv/ Hz Current Noise Density in f = 0 Hz 0.3 pa/ Hz Rev. A Page 4 of 2

4 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Rating Supply Voltage ± V Input Voltage ±V supply Differential Input Voltage ±0.7 V Output Short-Circuit Duration to GND Indefinite Storage Temperature Range RM, R Packages 6 C to +0 C Operating Temperature Range 40 C to +2 C Junction Temperature Range RM, R Packages 6 C to +0 C Lead Temperature Range (Soldering, 0 sec) 300 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 4. Thermal Resistance Package Type θja θjc Unit -Lead MSOP (RM) 20 4 C/W -Lead SOIC_N (R) 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 0 ma. ESD CAUTION Rev. A Page of 2

5 OUTLINE DIMENSIONS.00 (0.96) 4.0 (0.90) (0.74) 3.0 (0.497) 0.2 (0.009) 0.0 (0.0040) COPLANARITY 0.0 SEATING PLANE 4.27 (0.000) BSC 6.20 (0.2440).0 (0.224).7 (0.06).3 (0.032) 0. (0.020) 0.3 (0.022) 0.2 (0.009) 0.7 (0.0067) 0.0 (0.096) 0.2 (0.0099).27 (0.000) 0.40 (0.07) COMPLIANT TO JEDEC STANDARDS MS-02-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 A PIN BSC COPLANARITY MAX SEATING PLANE Figure 29. -Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-) Dimensions shown in millimeters and (inches) COMPLIANT TO JEDEC STANDARDS MO-7-AA Figure 30. -Lead Mini Small Outline Package [MSOP] (RM-) Dimensions shown in millimeters ORDERING GUIDE Model Temperature Range Package Description Package Option Branding AD676ARMZ-R2 40 C to +2 C -Lead Mini Small Outline Package [MSOP] RM- A3 AD676ARMZ-REEL 40 C to +2 C -Lead Mini Small Outline Package [MSOP] RM- A3 AD676ARZ 40 C to +2 C -Lead Standard Small Outline Package [SOIC_N] R- AD676ARZ-REEL 40 C to +2 C -Lead Standard Small Outline Package [SOIC_N] R- AD676ARZ-REEL7 40 C to +2 C -Lead Standard Small Outline Package [SOIC_N] R- AD676BRMZ-R2 40 C to +2 C -Lead Mini Small Outline Package [MSOP] RM- AL AD676BRMZ-REEL 40 C to +2 C -Lead Mini Small Outline Package [MSOP] RM- AL AD676BRZ 40 C to +2 C -Lead Standard Small Outline Package [SOIC_N] R- AD676BRZ-REEL 40 C to +2 C -Lead Standard Small Outline Package [SOIC_N] R- AD676BRZ-REEL7 40 C to +2 C -Lead Standard Small Outline Package [SOIC_N] R- Z = RoHs Compliant Part. Rev. A Page of 2