1LT16771677faLow Noise, Rail-to-RailPrecision Op Amp■Rail-to-Rail Input and Output■100% Tested Low Voltage Noise:3.2nV/√Hz Typ at 1kHz4.5nV/√Hz Max at 1kHz■Offset Voltage: 60µV Max■Low VOS Drift: 0.2µV/°C Typ■Low Input Bias Current: 20nA Max■Wide Supply Range: 3V to ±18V■High AVOL: 7V/µV Min, RL = 10k■High CMRR: 109dB Min■High PSRR: 108dB Min■Gain Bandwidth Product: 7.2MHz■Slew Rate: 2.5V/µs■Operating Temperature Range: –40°C to 85°CThe LT®1677 features the lowest noise performance avail-able for a rail-to-rail operational amplifier: 3.2nV/√Hzwideband noise, 1/f corner frequency of 13Hz and 90nVpeak-to-peak 0.1Hz to 10Hz noise. Low noise is combinedwith outstanding precision: 20µV offset voltage and0.2µV/°C drift, 130dB common mode and power supplyrejection and 7.2MHz gain bandwidth product. The com-mon mode range exceeds the power supply by 100mV.The voltage gain of the LT1677 is extremely high, 19 million(typical) driving a 10k load.In the design, processing and testing of the device, particularattention has been paid to the optimization of the entiredistribution of several key parameters. Consequently, thespecifications have been spectacularly improved comparedto competing rail-to-rail amplifiers.3V Electret Microphone Amplifier■Low Noise Signal Processing■Microvolt Accuracy Threshold Detection■Strain Gauge Amplifiers■Tape Head Preamplifiers■Direct Coupled Audio Gain Stages■Infrared Detectors■Battery-Powered MicrophonesFEATURESDESCRIPTIOUAPPLICATIO SUTYPICAL APPLICATIOUR31MR210kAV = –100R110kPANASONICELECTRETCONDENSERMICROPHONEWM-61www.panasonic.com/pic(714) 373-7334C10.68µF23HzHIGHPASSTO PAORHEADPHONES–+LT1677234761.5V1.5V–1.5V1677 TA01INPUT OFFSET VOLTAGE (µV)–40PERCENT OF UNITS152025–10 10 401677 TA021050–30 –20020 30TA = 25°CVS = ±15VDistribution of Offset Voltage, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.2LT16771677faSYMBOL PARAMETER CONDITIONS (Note 6) MIN TYP MAX UNITSVOSInput Offset Voltage (Note 11) 35 90 µV0°C ≤ TA ≤ 70°C ● 55 150 µV–40°C ≤ TA ≤ 85°C ● 75 210 µVVCM = VS + 0.1V 150 400 µVVCM = VS – 0.2V, 0°C ≤ TA ≤ 70°C ● 180 550 µVVCM = VS – 0.3V, –40°C ≤ TA ≤ 85°C ● 200 650 µVVCM = –0.1V 1.5 5.0 mVVCM = 0V, 0°C ≤ TA ≤ 70°C ● 1.8 6.0 mVVCM = 0V, –40°C ≤ TA ≤ 85°C ● 2.0 6.5 mV ∆VOSAverage Input Offset Drift (Note 10) SO-8 ● 0.40 2.0 µV/°C∆TempN8● 0.20 1.5 µV/°C ∆VOSLong Term Input Voltage Stability 0.3 µV/Mo∆TimeIBInput Bias Current (Note 11) ±2 ±20 nA0°C ≤ TA ≤ 70°C ● ±3 ±35 nA–40°C ≤ TA ≤ 85°C ● ±7 ±50 nAVCM = VS + 0.1V 0.19 0.40 µAVCM = VS – 0.2V, 0°C ≤ TA ≤ 70°C ● 0.19 0.60 µAVCM = VS – 0.3V, –40°C ≤ TA ≤ 85°C ● 0.25 0.75 µAVCM = –0.1V –1.2 – 0.41 µAVCM = 0V, 0°C ≤ TA ≤ 70°C ● –2.0 – 0.45 µAVCM = 0V, –40°C ≤ TA ≤ 85°C ● –2.3 – 0.47 µAIOSInput Offset Current (Note 11) 415 nA0°C ≤ TA ≤ 70°C ● 520 nA–40°C ≤ TA ≤ 85°C ● 840 nAVCM = VS + 0.1V 6 30 nAVCM = VS – 0.2V, 0°C ≤ TA ≤ 70°C ● 10 40 nAVCM = VS – 0.3V, –40°C ≤ TA ≤ 85°C ● 15 65 nAVCM = –0.1V 20 100 nAVCM = 0V, 0°C ≤ TA ≤ 70°C ● 25 150 nAVCM = 0V, –40°C ≤ TA ≤ 85°C ● 30 160 nA(Note 1)Supply Voltage ...................................................... ±22VInput Voltages (Note 2) ............ 0.3V Beyond Either RailDifferential Input Current (Note 2) ..................... ± 25mAOutput Short-Circuit Duration (Note 3) ............ IndefiniteStorage Temperature Range ................. – 65°C to 150°CLead Temperature (Soldering, 10 sec.)................. 300°COperating Temperature RangeLT1677C (Note 4) ............................. –40°C to 85°CLT1677I ............................................. –40°C to 85°CSpecified Temperature RangeLT1677C (Note 5) ............................. –40°C to 85°CLT1677I ............................................. –40°C to 85°CThe ● denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. VS = 3V, VCM = VO = 1.7V; VS = 5V, VCM = VO = 2.5V unless otherwise noted.ABSOLUTE AXI U RATI GSWWWUPACKAGE/ORDER I FOR ATIOUUWELECTRICAL CHARACTERISTICSORDER PART NUMBEROrder Options Tape and Reel: Add #TRLead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBFLead Free Part Marking: http://www.linear.com/leadfree/LT1677CS8LT1677IS8LT1677CN8LT1677IN816771677ITOP VIEWS8 PACKAGE8-LEAD PLASTIC SON8 PACKAGE8-LEAD PDIP12348765VOSTRIMVOSTRIM+VSOUTNC–IN+IN–VS–+TJMAX = 150°C, θJA = 150°C/ W (N8)TJMAX = 150°C, θJA = 190°C/ W (S0-8)S8 PART MARKINGConsult LTC Marketing for parts specified with wider operating temperature ranges.3LT16771677faSYMBOL PARAMETER CONDITIONS (Note 6) MIN TYP MAX UNITSenInput Noise Voltage 0.1Hz to 10Hz (Note 7) 90 nVP-PVCM = VS180 nVP-PVCM = 0V 600 nVP-PInput Noise Voltage Density (Note 8) fO = 10Hz 5.2 nV/√HzVCM = VS, fO = 10Hz 7 nV/√HzVCM = 0V, fO = 10Hz 25 nV/√HzfO = 1kHz 3.2 4.5 nV/√HzVCM = VS, fO = 1kHz 5.3 nV/√HzVCM = 0V, fO = 1kHz 17 nV/√HzinInput Noise Current Density fO = 10Hz 1.2 pA/√HzfO = 1kHz 0.3 pA/√HzVCMInput Voltage Range –0.1 VS + 0.1V V0°C ≤ TA ≤ 70°C ● 0VS – 0.2V V –40°C ≤ TA ≤ 85°C ● 0VS – 0.3V VRINInput Resistance Common Mode 2 GΩCINInput Capacitance 4.2 pFCMRR Common Mode Rejection Ratio (Note 11) VS = 3VVCM = –0.1V to 3.1V 55 68 dBVCM = 0V to 2.7V ● 53 67 dBVS = 5VVCM = –0.1V to 5.1V 60 73 dBVCM = 0V to 4.7V ● 58 72 dBPSRR Power Supply Rejection Ratio VS = 2.7V to 40V, VCM = VO = 1.7V 108 125 dBVS = 3.1V to 40V, VCM = VO = 1.7V ● 105 120 dBAVOLLarge-Signal Voltage Gain VS = 3V, RL ≥ 10k, VO = 2.5V to 0.7V 0.6 4 V/µV0°C ≤ TA ≤ 70°C ● 0.4 3 V/µV–40°C ≤ TA ≤ 85°C ● 0.4 3 V/µVVS = 3V, RL ≥ 2k, VO = 2.2V to 0.7V 0.5 1 V/µV0°C ≤ TA ≤ 70°C ● 0.4 0.9 V/µV–40°C ≤ TA ≤ 85°C ● 0.4 0.8 V/µVVS = 3V, RL ≥ 600Ω, VO = 2.2V to 0.7V 0.20 0.43 V/µV0°C ≤ TA ≤ 70°C ● 0.15 0.40 V/µV–40°C ≤ TA ≤ 85°C ● 0.10 0.35 V/µVVS = 5V, RL ≥ 10k, VO = 4.5V to 0.7V 0.8 5 V/µV0°C ≤ TA ≤ 70°C ● 0.7 4 V/µV–40°C ≤ TA ≤ 85°C ● 0.7 4 V/µVVS = 5V, RL ≥ 2k, VO = 4.2V to 0.7V 0.40 0.9 V/µV0°C ≤ TA ≤ 70°C ● 0.35 0.8 V/µV–40°C ≤