LT1055/LT1056 Precision, High Speed, JFET Input Operational Amplifiers FEATURES DESCRIPTION n Guaranteed Offset Voltage: 150V Max The LT 1055/LT1056 JFET input operational amplifiers 55C to 125C: 500V Max combine precision specifications with high speed per- n Guaranteed Drift: 4V/C Max formance. n Guaranteed Bias Current For the first time, 16V/s slew rate and 6.5MHz gain 70C: 150pA Max bandwidth product are simultaneously achieved with offset 125C: 2.5nA Max voltage of typically 50V, 1.2V/C drift, bias currents of n Guaranteed Slew Rate: 12V/s Min 40pA at 70C and 500pA at 125C. n Available in 8-Pin PDIP and SO Packages The 150V maximum offset voltage specification is the best available on any JFET input operational amplifier. APPLICATIONS The LT1055 and LT1056 are differentiated by their operating n Precision, High Speed Instrumentation currents. The lower power dissipation LT1055 achieves n Logarithmic Amplifiers lower bias and offset currents and offset voltage. The ad- n D/A Output Amplifiers ditional power dissipation of the LT1056 permits higher n Photodiode Amplifiers slew rate, bandwidth and faster settling time with a slight n Voltage-to-Frequency Converters sacrifice in DC performance. n Frequency-to-Voltage Converters n The voltage-to-frequency converter shown below is one Fast, Precision Sample-and-Hold of the many applications which utilize both the precision and high speed of the LT1055/LT1056. For a JFET input op amp with 23V/s guaranteed slew rate, refer to the LT1022 data sheet. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Distribution of Input Offset Voltage 1Hz to 10kHz Voltage-to-Frequency Converter (H Package) 4.7k 3M 140 15V V = 15V 50% TO 60V S T = 25C A 0.001 (POLYSTYRENE) 120 634 UNITS TESTED FROM THREE RUNS 10kHz 100 TRIM OUTPUT 15V 5k 75k 2 1Hz TO 10kHz 0V TO 10V 7 0.005% 80 INPUT 1.5k 6 LINEARITY LT1056 0.1F 60 22k 3 4 + 40 15V 33pF LM329 3.3M 20 2N3906 = 1N4148 0.1F 0 400 200 0 200 400 *1% FILM THE LOW OFFSET VOLTAGE OF LT1056 15V INPUT OFFSET VOLTAGE (V) CONTRIBUTES ONLY 0.1Hz OF ERROR WHILE ITS HIGH SLEW RATE PERMITS LT1055/56 TA02 10kHz OPERATION. LT1055/56 TA01 10556fd 1 For more information www.linear.com/LT1055 NUMBER OF UNITSLT1055/LT1056 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage .......................................................20V LT1055AC/LT1055C/LT1056AC/ Differential Input Voltage ........................................40V LT1056C .................................................. 0C to 70C Input Voltage ..........................................................20V Storage Temperature Range Output Short-Circuit Duration .......................... Indefinite All Devices ......................................... 65C to 150C Operating Temperature Range Lead Temperature (Soldering, 10 sec) ...................300C LT1055AM/LT1055M/LT1056AM/ LT1056M (OBSOLETE) ...................... 55C to 125C PIN CONFIGURATION TOP VIEW TOP VIEW BAL 1 8 N/C BAL 1 8 N/C + + IN V 2 7 IN 2 7 V +IN 3 6 OUT +IN OUT 3 6 V 4 5 BAL V BAL 4 5 N8 PACKAGE S8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO T = 150C, = 130C/W JMAX JA T = 150C, = 130C/W JMAX JA TOP VIEW NC 8 + V BALANCE 1 7 IN 2 6 OUT 5 3 BALANCE +IN 4 V H PACKAGE 8-LEAD TO-5 METAL CAN T = 150C, = 150C/W, = 45C/W JMAX JA JC OBSOLETE PACKAGE Consider the N8 for Alternate Source 10556fd 2 For more information www.linear.com/LT1055