LT1464/LT1465 Dual/Quad Micropower, 1MHz C-Load Picoampere Bias Current JFET Input Op Amps FEATURES DESCRIPTION n Input Bias Current: The LT 1464 (dual) and LT1465 (quad) are the first 2pA Max (LT1464A) micropower op amps (200A max per amp) to offer 20pA Max (LT1464, LT1465) picoampere input bias currents (500fA typ) and unity-gain n Supply Current per Amplifier: 200A Max stability for capacitive loads up to 10nF. The output can n Gain Bandwidth Product: 1MHz Typ swing a 10k load to within 1.5V of either supply, just like n Slew Rate: 0.9V/s Typ op amps that require an order of magnitude more supply n Input Common Mode Range Includes Positive Rail current. This unique combination of performance makes TM n Unity-Gain Stable for C-Load Up to 10nF the LT1464/LT1465 ideal over a wide range of input and n Open-Loop Gain: 1 Million Typ output impedances. n Guaranteed Specs with 5V, 15V Supplies In the design and testing of the LT1464/LT1465, particular n Guaranteed Matching Specifications emphasis has been placed on optimizing performance in n Standard Pinout: SO-8, SO-14 Package the low cost SO-8 (dual) and 14-lead SO (quad) package for U 15V and 5V supplies. The input common mode range APPLICATIONS includes the positive rail. Slew rate (0.5V/s min) and gain bandwidth product (650kHz min) are 100% tested. A full n Battery-Powered Systems set of matching specifications is also provided. n Photocurrent Amplifiers n Low Frequency, Micropower Active Filters , LTC and LT are registered trademarks of Linear Technology Corporation. n Low Droop Track-and-Hold Circuits C-Load is a trademark of Linear Technology Corporation. TYPICAL APPLICATION Micropower Low Droop Track-and-Hold/Peak Detector + V 1/4 LTC201 13 15 C1 Small-Signal Response, C = 10nF LOAD 10nF 16 A POLYSTYRENE 1 MCT2 5 4 14 + V V 5 2 8 2 6 4 + R1* 7 1 1/2 LT1464 1/2 LT1464 V OUT 6 3 IN MCT2 1 5 + 4 LT1464 TA01 V 1/4 LTC201 2 1 0.5pA B 2 6 4 TYPICAL DROOP = = 0.05mV/s 10nF TOTAL SUPPLY CURRENT = 460 A MAX 1464 TA02 A = 1 5 3 V * R1 = 600 FOR 15V SUPPLIES V = 5V, 15V S R1 = 0 FOR 5V SUPPLIES C = 10nF L FUNCTION MODE IN A IN B MODE IN A IN B Track-and-Hold Track 0 0 Hold 1 1 Positive Peak Detector Reset 0 0 Store 0 1 Negative Peak Detector Reset 0 0 Store 1 0 LTC201 switch is open for logic1 . 1 U ULT1464/LT1465 ABSOLUTE MAXIMUM RATINGS Supply Voltage ..................................................... 20V Specified Temperature Range ................ 40C to 85C Differential Input Voltage ...................................... 40V Maximum Junction Temperature ......................... 150C Input Current ....................................................... 20mA Storage Temperature Range ................ 65C to 150C Output Short-Circuit Duration ......................... Indefinite Lead Temperature (Soldering, 10 sec)................. 300C Operating Temperature Range ............... 40C to 85C PACKAGE/ORDER INFORMATION TOP VIEW ORDER PART ORDER PART TOP VIEW NUMBER 14 NUMBER OUT A 1 OUT D + IN A 2 13 IN D OUT A 1 8 V A D LT1464ACN8 LT1465CN +IN A 3 12 +IN D IN A 2 7 OUT B A LT1464ACS8 + LT1465CS V 4 11 V +IN B 3 6 IN B B LT1464CN8 +IN B 5 10 +IN C V 4 5 +IN B B C LT1464CS8 IN B 6 9 IN C N8 PACKAGE S8 PACKAGE OUT B 7 8 OUT C 8-LEAD PDIP 8-LEAD PLASTIC SO S8 PART MARKING N PACKAGE S PACKAGE T = 150C, = 130C/ W (N) JMAX JA 14-LEAD PDIP 14-LEAD PLASTIC SO T = 150C, = 190C/ W (S) JMAX JA 1464A T = 150C, = 110C/ W (N) JMAX JA 1464 T = 150C, = 150C/ W (S) JMAX JA Consult factory for Industrial and Military grade parts. V = 15V, V = 0V, T = 25C, unless otherwise noted. ELECTRICAL CHARACTERISTICS S CM A LT1464AC LT1464C/LT1465C SYMBOL PARAMETER CONDITIONS (Note 1) MIN TYP MAX MIN TYP MAX UNITS V Input Offset Voltage V = 5V 0.4 0.8 0.4 0.8 mV OS S V = 15V 0.6 2.0 0.6 2.0 mV S I Input Offset Current V = 5V 0.2 1.2 pA OS S V = 15V 0.5 2.0 0.5 15 pA S I Input Bias Current V = 5V 0.4 2.0 pA B S V = 15V 0.5 3.0 0.5 20 pA S e Input Noise Voltage 0.1Hz to 10Hz 2 2 V n P-P Input Noise Voltage Density f = 10Hz 33 33 nV/Hz O f = 1000Hz 24 24 nV/Hz O Input Noise Current Density f = 10Hz, 1kHz (Note 3) 0.4 0.4 fA/Hz O CMRR Common Mode Rejection Ratio V = 12.5V to 15V 76 85 74 85 dB CM PSRR Power Supply Rejection Ratio V = 2.5V to 20V 81 90 78 90 dB S 12 12 R Input ResistanceDifferential 10 10 IN 12 12 Common Mode V = 12.5V to 8V 10 10 CM 11 11 Common Mode V = 8V to 15V 0 10 CM C Input Capacitance 3 3 pF IN A Large-Signal Voltage Gain V = 10V, R = 10k 350 1000 300 900 V/mV VOL O L V = 10V, R = 2k 150 450 150 450 V/mV O L V = 5V, V = 2V, R = 10k 100 250 100 250 V/mV S O L V = 5V, V = 1V, R = 2k 50 170 50 170 V/mV S O L 2 U W U W U WW