Precision Low Noise, Low Input Bias Current Operational Amplifiers Data Sheet OP1177/OP2177/OP4177 FEATURES PIN CONFIGURATIONS Low offset voltage: 60 V maximum NC 1 8 NC Very low offset voltage drift: 0.7 V/C maximum IN 2 7 V+ Low input bias current: 2 nA maximum OP1177 18 NC NC +IN 3 6 OUT IN V+ Low noise: 8 nV/Hz typical OP1177 +IN OUT V 4 5 NC CMRR, PSRR, and A > 120 dB minimum VO V 45 NC Low supply current: 400 A per amplifier NC = NO CONNECT NC = NO CONNECT Dual supply operation: 2.5 V to 15 V Figure 1. 8-Lead MSOP (RM Suffix) Figure 2. 8-Lead SOIC N (R Suffix) Unity-gain stable No phase reversal OUT A 1 8 V+ Inputs internally protected beyond supply voltage IN A OUT B 2 7 OP2177 OUT A 18 V+ +IN A 3 6 IN B IN A OUT B APPLICATIONS OP2177 +IN A IN B V 4 5 +IN B 45 V +IN B Wireless base station control circuits Figure 3. 8-Lead MSOP (RM Suffix) Figure 4. 8-Lead SOIC N (R Suffix) Optical network control circuits Instrumentation OUT A 1 14 OUT D Sensors and controls 213 IN D IN A Thermocouples +IN A 3 12 +IN D Resistor thermal detectors (RTDs) OP4177 V+ 4 11 V Strain bridges OUT A 1 OUT D 14 IN D IN A Shunt current measurements +IN C +IN B 5 10 +IN A +IN D V+ OP4177 V Precision filters 69 IN B IN C +IN B +IN C IN B IN C OUT B78 OUT C 8 OUT B 7 OUT C Figure 5. 14-Lead SOIC N (R Suffix) Figure 6. 14-Lead TSSOP (RU Suffix) GENERAL DESCRIPTION The OPx177 family consists of very high precision, single, dual, performance in the SOIC package. MSOP and TSSOP are and quad amplifiers featuring extremely low offset voltage and available in tape and reel only. drift, low input bias current, low noise, and low power consump- The OPx177 family offers the widest specified temperature tion. Outputs are stable with capacitive loads of over 1000 pF range of any high precision amplifier in surface-mount packaging. with no external compensation. Supply current is less than 500 A All versions are fully specified for operation from 40C to per amplifier at 30 V. Internal 500 series resistors protect the +125C for the most demanding operating environments. inputs, allowing input signal levels several volts beyond either Applications for these amplifiers include precision diode supply without phase reversal. power measurement, voltage and current level setting, and Unlike previous high voltage amplifiers with very low offset level detection in optical and wireless transmission systems. voltages, the OP1177 (single) and OP2177 (dual) amplifiers Additional applications include line-powered and portable are available in tiny 8-lead surface-mount MSOP and 8-lead instrumentation and controlsthermocouple, RTD, narrow SOIC packages. The OP4177 (quad) is available in strain-bridge, and other sensor signal conditioningand TSSOP and 14-lead narrow SOIC packages. Moreover, specified precision filters. performance in the MSOP and the TSSOP is identical to Rev. 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Trademarks and registered trademarks are the property of their respective owners. 02627-001 02 62 7-0 05 0 262 7-00 3 02627-002 02 627 -0 04 02627-006OP1177/OP2177/OP4177 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Overload Recovery Time .......................................................... 15 Applications ...................................................................................... 1 THD + Noise .............................................................................. 16 Pin Configurations ........................................................................... 1 Capacitive Load Drive ............................................................... 16 General Description ......................................................................... 1 Stray Input Capacitance Compensation ................................. 17 Revision History ............................................................................... 2 Reducing Electromagnetic Interference ................................. 17 Specifications .................................................................................... 3 Proper Board Layout ................................................................. 18 Electrical Characteristics ............................................................. 3 Difference Amplifiers ................................................................ 18 Electrical Characteristics ............................................................. 4 A High Accuracy Thermocouple Amplifier ........................... 19 Absolute Maximum Ratings ........................................................... 5 Low Power Linearized RTD ..................................................... 19 Thermal Resistance ...................................................................... 5 Single Operational Amplifier Bridge ....................................... 20 ESD Caution.................................................................................. 5 Realization of Active Filters .......................................................... 21 Typical Performance Characteristics ............................................. 6 Band-Pass KRC or Sallen-Key Filter ....................................... 21 Functional Description .................................................................. 14 Channel Separation .................................................................... 21 Total Noise-Including Source Resistors .................................. 14 References on Noise Dynamics and Flicker Noise ............... 21 Gain Linearity ............................................................................. 14 Outline Dimensions ....................................................................... 22 Input Overvoltage Protection ................................................... 15 Ordering Guide .......................................................................... 24 Output Phase Reversal ............................................................... 15 Settling Time ............................................................................... 15 REVISION HISTORY Changes to Figure 58 to Figure 61 ............................................... 17 8/2020Rev. H to Rev. I Changes to Ordering Guide .......................................................... 24 Changes to Figure 62 and Figure 63 ............................................ 18 Changes to Figure 64 ..................................................................... 19 9/2018Rev. G to Rev. H Changes to Figure 65 and Figure 66 ............................................ 20 Changes to Ordering Guide .......................................................... 24 Changes to Figure 67 and Figure 68 ............................................ 21 Removed SPICE Model Section ................................................... 21 11/2009Rev. F to Rev. G Updated Outline Dimensions ...................................................... 22 Changes to Figure 64 ..................................................................... 19 Changes to Ordering Guide .......................................................... 24 Changes to Ordering Guide .......................................................... 24 Updated Outline Dimensions ....................................................... 22 4/2004Rev. B to Rev. C Changes to Ordering Guide ............................................................. 4 5/2009Rev. E to Rev. F Changes to TPC 6 .............................................................................. 5 Changes to Figure 64 ..................................................................... 19 Changes to TPC 26 ............................................................................ 7 Changes to Ordering Guide .......................................................... 24 Updated Outline Dimensions ...................................................... 17 10/2007Rev. D to Rev. E 4/2002Rev. A to Rev. B Changes to General Description .................................................... 1 Added OP4177 ......................................................................... Global Changes to Table 4 ........................................................................... 5 Edits to Specifications ....................................................................... 2 Updated Outline Dimensions ....................................................... 22 Edits to Electrical Characteristics Headings .................................. 4 Edits to Ordering Guide ................................................................... 4 7/2006Rev. C to Rev. D Changes to Table 4 ........................................................................... 5 11/2001Rev. 0 to Rev. A Changes to Figure 51 ..................................................................... 14 Edit to Features .................................................................................. 1 Changes to Figure 52 ..................................................................... 15 Edits to TPC 6 ................................................................................... 5 Changes to Figure 54 ..................................................................... 16 7/2001Revision 0: Initial Version Rev. I Page 2 of 24