LT1078 Linear Technology, LT1078 Datasheet
LT1078
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LT1078 Summary of contents
Page 1
... This results in low frequency (0.1Hz to 10Hz) noise performance which can only be found on devices with an order of magnitude higher supply current. Both the LT1078 and LT1079 can be operated from a single supply (as low as one lithium cell or two Ni-Cad batteries). The input range goes below ground. The all- NPN output stage swings to within a few millivolts of ground while sinking current— ...
Page 2
... C, = 100 C/ W (J) JMAX 110 C, = 130 C/ W (N) JMAX RATINGS Operating Temperature Range LT1078AM/LT1078M/ LT1079AM/LT1079M ............................ – 125 C LT1078I/LT1079I .................................... – LT1078AC/LT1078C/LT1078S8/ LT1079AC/LT1079C .................................... Lead Temperature (Soldering, 10 sec).................. 300 TOP VIEW + OUT – OUT B ...
Page 3
... No Load 200 O = 0.03V to 3.5V 50k 150 100 A SINK 4.2 3 2.5V 0. 20kHz 3V 10k IN L LT1078/LT1079 = 1.4V unless otherwise noted LT1078C/LT1079C LT1078I/LT1079I LT1078AC/LT1079AC LT1078M/LT1079M LT1078AM/LT1079AM LT1078S8/LT1079SW TYP MAX MIN TYP 100 40 60 0.4 0.5 0.05 0.25 0. 0.6 1.2 0 ...
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... CM = 3.1V to 12V 0.05V to 4V, No Load 110 O = 0.05V to 3.5V 50k 100 A SINK 3.9 3 unless otherwise noted. A LT1078AC/LT1079AC MIN = 2.6V to 12V 100 S = 0.05V to 4V, No Load 150 O = 0.05V to 3.5V 50k 110 100 A SINK 4.1 3.3 125 C for AM/M grades, unless otherwise noted. ...
Page 5
... ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS V Input Offset Voltage (Including LT1078IS8/LT1078S8) OS LT1079ISW/LT1079SW I Input Offset Current OS I Input Bias Current B Input Voltage Range CMRR Common Mode Rejection Ratio V PSRR Power Supply Rejection Ratio V A Large-Signal Voltage Gain V VOL V V Maximum Output Voltage R OUT ...
Page 6
... Note 1: Typical parameters are defined as the 60% yield of parameter distributions of individual amplifiers, i.e., out of 100 LT1079s (or 100 LT1078s) typically 240 op amps (or 120) will be better than the indicated specification. Note 2: This parameter is tested on a sample basis only. All noise parameters are tested with ...
Page 7
... OP AMPS –2 – OFFSET VOLTAGE DRIFT WITH TEMPERATURE ( V/ C) LT1078/79 • TPC08 LT1078/LT1079 Input Bias Current vs Common Mode Voltage 5V – –55 C – – 125 C A –8 –10 – ...
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... Large-Signal Transient Response V = 15V 100 s/DIV V NO LOAD Voltage Gain vs Load Resistance 10M V = 15V 5V –55 C 125 C 1M –55 C 125 C 100k 3 100 1k 10k 100k LOAD RESISTANCE TO GROUND ( ) = 10 V 10000 LT1078/79 • TPC12 0V LT1078/79 • TPC28 LT1078/79 • TPC18 ...
Page 9
... SUPPLY 2. SINE WAVE 100 1k 10k FREQUENCY (Hz) LT1078/79 • TPC26 LT1078/LT1079 Distribution of Input Offset Voltage (LT1078 in 8-Pin SO Package 5V 125 – –160 –120 –80 –40 0 INPUT OFFSET VOLTAGE ( V) ...
Page 10
... Single Supply Operation The LT1078/LT1079 are fully specified for single supply operation, i.e., when the negative supply is 0V. Input common mode range goes below ground and the output swings within a few millivolts of ground while sinking current ...
Page 11
... The compet- ing devices, however, cannot even sink 6nA without a pull- down resistor Since the output of the LT1078/LT1079 cannot go exactly to ground, but can only approach ground to within a few millivolts, care should be exercised to ensure that the output is not saturated ...
Page 12
... V. 97dB (= 14 V/V) CMRR means that worst-case CMRR match is 91dB (= 28 V/V). However, Table 1 can be used to estimate the expected matching performance at V the two sides of the LT1078, and between amplifiers A and D, and between amplifiers B and C of the LT1079. LT1078C/LT1079C/LT1078M/LT1079M 98% YIELD ...
Page 13
... OUTPUT NOISE = 0.1Hz TO 10Hz P-P THE LT1078 CONTRIBUTES LESS THAN 3% OF THE TOTAL OUTPUT NOISE AND DRIFT WITH TIME AND TEMPERATURE. THE ACCURACY OF THE –5V OUTPUT DEPENDS ON THE MATCHING OF THE TWO 1M RESISTORS Picoampere Input Current, Triple Op Amp Instrumentation Amplifier with Bias Current Cancellation – ...
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... 1/4 LT1079 CD4016B Half-Wave Rectifier – INPUT OUTPUT 1/2 LT1078 6mV OMIN NO DISTORTION TO 100Hz 1.8V 0V LT1078/79 • TA07 3. OUTPUT LT1078/79 • TA08 11 13 – OUT 1/4 LT1079 LT1078/79 • TA09 9 7 CD4016B GAIN PIN 13 PIN 5 PIN 6 1000 ...
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... OUT POSITIVE SUPPLY CURRENT = 165 A + 500k BANDWIDTH (< 3V SIGNAL): X AND Y INPUTS = 10kHz P-P Z INPUT = 4kHz LT1078/LT1079 – OUTPUT 7 1/2 LT1078 TYPICAL OFFSET 600 V + LT1078/79 • TA10 505k 0.1% Z INPUT (5mV TO 50V) 220pF 13 – 14 1/4 LT1079 12 + 10k GAIN – 8 OUTPUT 1/4 LT1079 (5mV TO 8V) + LT1078/79 • TA11 15 ...
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... Q5 BIPOLAR SYMMETRY IS EXCELLENT BECAUSE ONE DEVICE, Q2, SETS BOTH LIMITS SUPPLY CURRENT 240 A –9V BANDWIDTH = 150kHz SET 470k 1M** 1M** 13 – 1/4 LT1079 OUT 510k 12 + LT1078/79 • TA12 SET OUT 2N4393 SET 1% FILM * ** RATIO MATCH 0.05% Q2, Q3, Q4, Q5 CA3096 TRANSISTOR ARRAY ...
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... METAL FILM 2M 2M 910k 1/2 LT1078 2 – 1/2 LT1078 6 255k 280k – LT1004-1.2 LT1078/79 • TA13 TOTAL SUPPLY CURRENT = 105 A 3V (LITHIUM) 13k* 12.3k 10k* 1/2 LT1078 2 50k – 1k** 1k** 4 TRIM (SELECT AT 110 C) ...
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... Q19 Q23 Q10 Q17 Q20 Q34 1.35k 5k 11.5k Q54 Q53 Q47 Q46 – V Q40 Q41 Q35 + V 30 Q44 OUT 150k Q36 Q33 Q48 Q42 Q50 + 9.1k V Q51 Q45 Q55 10k Q43 Q38 30 5.35k LT1078/79 • SIMPLIFIED SCHEM + V 12.5k Q52 J1 Q49 700k 700k – V ...
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... RAD TYP 0.100 0.010 0.125 (2.540 0.254) (3.175) MIN 0.014 – 0.026 (0.360 – 0.660) LT1078/LT1079 0.027 – 0.045 (0.686 – 1.143) 0.027 – 0.034 0.200 (5.080) TYP 0.110 – 0.160 (2.794 – 4.064) INSULATING STANDOFF H8(TO-5) 0 ...
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... LT1078/LT1079 PACKAGE DESCRIPTION 0.045 – 0.065 0.300 – 0.325 (1.143 – 1.651) (7.620 – 8.255) 0.065 (1.651) 0.009 – 0.015 TYP (0.229 – 0.381) 0.005 +0.025 (0.127) 0.325 –0.015 MIN +0.635 0.100 0.010 8.255 –0.381 (2.540 0.254) 0.130 0.005 0.300 – ...