1 LTC6268-10/LTC6269-10 . 4 GHz Ultra-Low Bias Current FET Input Op Amp FEATURES DESCRIPTION. nn Gain Bandwidth Product: 4 GHz The LTC 6268-10/LTC6269-10 is a single/dual 4 GHz FET- nn Low Input Bias Current : input operational amplifier with extremely low input bias nn 3fA Typ. Room Temperature Current and low input capacitance. It also features low nn 4pA Max at 125 C input-referred Current noise and voltage noise making it an nn Current Noise (100kHz): 7fA/ Hz ideal choice for high speed transimpedance amplifiers, and nn Voltage Noise (1 MHz): Hz high-impedance sensor amplifiers. It is a decompensated nn Extremely Low C IN op amp that is gain-of-10 stable. nn Rail-to-Rail Output It operates on to supply and consumes nn A 10. V per amplifier.
2 A shutdown feature can be used to lower nn Slew Rate: +1500V/ s, 1000V/ s power consumption when the amplifier is not in use. nn Supply Range: to nn Quiescent Current : The LTC6268-10 single op amp is available in 8-lead SOIC. nn Operating Temp Range: 40 C to 125 C. and 6-lead SOT-23 packages. The SOIC package includes nn Single in 8-Lead SO-8, 6-Lead TSOT-23 Packages two unconnected pins which can be used to create an input nn Dual in 8-Lead MS8, 3mm 3mm 10-Lead pin guard ring to protect against board leakage currents. The LTC6269-10 dual op amp is available in 8-lead MSOP. DFN 10 Packages with exposed pad and 3mm 3mm 10-lead DFN packages. They are fully specified over the 40 C to 85 C and the APPLICATIONS 40 C to 125 C temperature ranges.
3 L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear nn Transimpedance Amplifiers Technology Corporation. All other trademarks are the property of their respective owners. nn ADC Drivers nn Photomultiplier Tube Post-Amplifier nn Low I. BIAS Circuits TYPICAL APPLICATION. 20k TIA Frequency Response 20k Gain 210 MHz Transimpedance Amplifier 90. 87. 84. PARASITIC. 20k FEEDBACK C 81. 78. GAIN (dB ). PD 75. 72. IPD VOUT = IPD 20k LTC6268-10 69. BW = 210 MHz + 66. 63. 626810 TA01. 60. PD = OSI OPTOELECTRONICS, FCI-125G-006 10k 100k 1M 10M 100M 1G. FREQUENCY (Hz). 626810 TA01b 626810f For more information 1. LTC6268-10/LTC6269-10 . ABSOLUTE MAXIMUM RATINGS. (Note 1). Supply Voltage V+ to V .. Specified Temperature Range (Note 4).
4 Input Voltage ..V to V+ + LTC6268-10 40 C to 85 C. Input Current (+IN, IN) (Note 2).. 1mA LTC6268-10 40 C to 125 C. Input Current (SHDN).. 1mA Maximum Junction 150 C. Output Current (IOUT ) (Note 8, 9)..135mA Storage Temperature 65 C to 150 C. Output Short-Circuit Duration (Note 3).. Thermally Limited Lead Temperature S8, S6 and Operating Temperature Range MS8E (Soldering, 10 sec).. 300 C. LTC6268-10 40 C to 85 C. LTC6268-10 40 C to 125 C. PIN CONFIGURATION. TOP VIEW. TOP VIEW. NC 1 8 SHDN. OUT 1 6 V+. IN 2 7 V+. V 2 5 SHDN. +IN 3 6 OUT. +IN 3 4 IN. NC 4 5 V . S6 PACKAGE. S8 PACKAGE 6-LEAD PLASTIC TSOT-23. 8-LEAD PLASTIC SO TJMAX = 150 C, JA = 192 C/W (NOTE 5). TJMAX = 150 C, JA = 120 C/W (NOTE 5). TOP VIEW. TOP VIEW. OUTA 1 10 V+. OUTA 1 8 V+ INA 2 9 OUTB.
5 INA 2 9 7 OUTB 11. +INA 3 V 8 INB. +INA 3 V 6 INB. V 4 5 +INB V 4 7 +INB. SDA 5 6 SDB. MS8E PACKAGE. 8-LEAD PLASTIC MSOP. TJMAX = 150 C, JA = 40 C/W (NOTE 5) DD PACKAGE. EXPOSED PAD (PIN 9) IS V , IT IS RECOMMENDED TO SOLDER TO PCB 10-LEAD (3mm 3mm) PLASTIC DFN. TJMAX = 150 C, JA = 43 C/W (NOTE 5). EXPOSED PAD (PIN 11) IS V , IT IS RECOMMENDED TO SOLDER TO PCB. 626810f 2 For more information LTC6268-10/LTC6269-10 . ORDER INFORMATION. LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE. LTC6268IS6-10#TRMPBF LTC6268IS6-10#TRPBF LTGQT 6-Lead Plastic TSOT-23 40 C to 85 C. LTC6268HS6-10#TRMPBF LTC6268HS6-10#TRPBF LTGQT 6-Lead Plastic TSOT-23 40 C to 125 C. LTC6268IS8-10#PBF LTC6268IS8-10#TRPBF 626810 8-Lead Plastic SOIC 40 C to 85 C.
6 LTC6268HS8-10#PBF LTC6268HS8-10#TRPBF 626810 8-Lead Plastic SOIC 40 C to 125 C. LTC6269 IMS8E-10#PBF LTC6269 IMS8E-10#TRPBF LTGRM 8-Lead Plastic MSOP 40 C to 85 C. LTC6269 HMS8E-10#PBF LTC6269 HMS8E-10#TRPBF LTGRM 8-Lead Plastic MSOP 40 C to 125 C. LTC6269 IDD-10#PBF LTC6269 IDD-10#TRPBF LGRK 10-Lead Plastic DD 40 C to 85 C. LTC6269 HDD-10#PBF LTC6269 HDD-10#TRPBF LGRK 10-Lead Plastic DD 40 C to 125 C. Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: For more information on tape and reel specifications, go to: ELECTRICAL CHARACTERISTICS The l denotes specifications that apply over the full operating temp erature range, otherwise specifications are at TA = 25 C, VSUPPLY = (V+ = 5V, V = 0V, VCM = mid-supply), RL = 1k , VSHDN.
7 Is unconnected. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS. VOS Input Offset Voltage VCM = mV. l 3 3 mV. VCM = mV. l mV. TC VOS Input Offset Voltage Drift VCM = 4 V/ C. IB Input Bias Current VCM = 20 3 20 fA. (Notes 6, 8) LTC6268I-10/LTC6269I-10 l 900 900 fA. LTC6268H-10/LTC6269H-10 l 4 4 pA. VCM = 20 3 20 fA. LTC6268I-10/LTC6269I-10 l 900 900 fA. LTC6268H-10/LTC6269H-10 l 4 4 pA. IOS Input Offset Current (Notes 6, 8) VCM = 40 6 40 fA. LTC6268I-10/LTC6269I-10 l 450 450 fA. LTC6268H-10/LTC6269H-10 l 2 2 pA. en Input Voltage Noise Density, VCM = f = 1 MHz nV/ Hz Input Voltage Noise Density, VCM = f = 1 MHz nV/ Hz Input Referred Noise Voltage f = to 10Hz VP-P. in Input Current Noise Density, VCM = f = 100kHz 7 fA/ Hz Input Current Noise Density, VCM = f = 100kHz 7 fA/ Hz RIN Input Resistance Differential >1000 G.
8 Common Mode >1000 G . CIN Input Capacitance Differential (DC to 200 MHz) pF. Common Mode (DC to 100 MHz) pF. CMRR Common Mode Rejection Ratio VCM = to (PNP Side) 72 85 dB. l 68 dB. VCM = to 64 82 dB. l 52 dB. IVR Input Voltage Range Guaranteed by CMRR l V. 626810f For more information 3. LTC6268-10/LTC6269-10 . ELECTRICAL CHARACTERISTICS The l denotes specifications that apply over the full operating temp erature range, otherwise specifications are at TA = 25 C, VSUPPLY = (V+ = 5V, V = 0V, VCM = mid-supply), RL = 1k , VSHDN. is unconnected. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS. PSRR Power Supply Rejection Ratio VCM = , VSUPPLY Ranges from to 78 95 dB. l 75 dB. Supply Voltage Range l AV Open Loop Voltage Gain VOUT = to RLOAD = 10k 125 250 V/mV.
9 L 40 V/mV. RLOAD = 100 10 21 V/mV. l 2 V/mV. VOL Output Swing Low (Input Overdrive 30mV) ISINK = 10mA 80 140 mV. Measured from V l 200 mV. ISINK = 25mA 130 200 mV. l 260 mV. VOH Output Swing High (Input Overdrive 30mV) ISOURCE = 10mA 70 140 mV. Measured from V+ l 200 mV. ISOURCE = 25mA 160 270 mV. l 370 mV. ISC Output Short Circuit Current (Note 9) 60 90 mA. l 40 mA. IS Supply Current Per Amplifier 15 18 mA. l 9 25 mA. Supply Current in Shutdown mA. (Per Amplifier) l mA. ISHDN Shutdown Pin Current VSHDN = l 12 2 12 A. VSHDN = l 12 2 12 A. VIL SHDN Input Low Voltage Disable l V. VIH SHDN Input High Voltage Enable. If SHDN is Unconnected, Amp is Enabled l V. tON Turn On Time, Delay from SHDN Toggle to SHDN Toggle from 0V to 2V 360 ns Output Reaching 90% of Target tOFF Turn Off Time, Delay from SHDN Toggle to SHDN Toggle from 2V to 0V 183 ns Output High Z.
10 GBW Gain-Bandwidth Product (Note 8) f = 10 MHz l 3500 4000 MHz SR+ Slew Rate+ AV = 11 (RF = 1000, RG = 100). VOUT = to , Measured 20% to 80%, 1100 1500 V/ s RLOAD = 500 l 600 V/ s SR Slew Rate AV = 11 (RF = 1000, RG = 100) 900 V/ s VOUT = to , Measured 80% to 20%, l 500 1000 V/ s FPBW Full Power Bandwidth (Note 7) 4VP-P 73 MHz HD Harmonic Distortion(HD2/HD3) AV = 10, 10 MHz. 2VP-P, VCM = , RL = 1k, 91/ 96 dB. RF = 450 , RG = 50 . ILEAK Output Leakage Current in Shutdown VSHDN = 0V, VOUT = 0V 400 nA. VSHDN = 0V, VOUT = 5V 400 nA. 626810f 4 For more information LTC6268-10/LTC6269-10 . ELECTRICAL CHARACTERISTICS. The l denotes specifications that apply over the full operating temp erature range, otherwise specifications are at TA = 25 C, VSUPPLY = (V+ = , V = 0V, VCM = mid-supply), RL = 1k , VSHDN is unconnected.