lt1012a Linear Technology Corporation, lt1012a Datasheet

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lt1012a

Manufacturer Part Number
lt1012a
Description
Picoamp Input Current, Microvolt Offset, Low Noise Op Amp
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURES
APPLICATIO S
TYPICAL APPLICATIO
COMMON MODE REJECTION RATIO = 74dB (RESISTOR LIMITED)
WITH OPTIONAL TRIM = 130dB
OUTPUT OFFSET (TRIMMABLE TO ZERO) = 500 V
OUTPUT OFFSET DRIFT = 10 V/ C
INPUT RESISTANCE = 1M
COMMON
250V Common Mode Range Instrumentation Amplifier (A
OP-07 Type Performance:
Guaranteed Offset Voltage: 25 V Max
Guaranteed Bias Current: 100pA Max
Guaranteed Drift: 0.6 V/ C Max
Low Noise, 0.1Hz to 10Hz: 0.5 V
Guaranteed Low Supply Current: 500 A Max
Guaranteed CMRR: 114dB Min
Guaranteed PSRR: 114dB Min
Guaranteed Operation at 1.2V Supplies
Replaces OP-07 While Saving Power
Precision Instrumentation
Charge Integrators
Wide Dynamic Range Logarithmic Amplifiers
Light Meters
Low Frequency Active Filters
Thermocouple Amplifiers
MODE
INPUT
250V
at 1/8th of OP-07’s Supply Current
at 1/20th of OP-07’s Bias and Offset Currents
–IN
+IN
3
7
1M
1M
R1
R3
U
R2
20k
4
6
5
R4
19.608k
2
3
+
– 6V TO –18V
6V TO 18V
LT1012
975k
R5
7
4
U
P-P
LT1012A • TA01
25k
R6
6
R1 TO R6: VISHAY 444
ACCUTRACT THIN FILM
SIP NETWORK
VISHAY INTERTECHNOLOGY, INC
63 LINCOLN HIGHWAY
MALVERN, PA 19355
X
1
2
: VISHAY 444 PIN NUMBERS
OUT
50k
OPTIONAL
CMRR
TRIM
V
= 1)
DESCRIPTIO
The LT
precision operational amplifier which can be used in
practically all precision applications. The LT1012
combines picoampere bias currents (which are
maintained over the full –55 C to 125 C temperature
range), microvolt offset voltage (and low drift with time
and temperature), low voltage and current noise, and
low power dissipation. The LT1012 achieves precision
operation on two Ni-Cad batteries with 1mW of power
dissipation. Extremely high common mode and
power supply rejection ratios, practically unmeasurable
warm-up drift, and the ability to deliver 5mA load current
with a voltage gain of one million round out the LT1012’s
superb precision specifications.
The all around excellence of the LT1012 eliminates the
necessity of the time consuming error analysis procedure
of precision system design in many applications; the
LT1012 can be stocked as the universal internally
compensated precision op amp.
Protected by U. S. patents 4,575,685 and 4,775,884
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1012 is an internally compensated universal
Picoamp Input Current,
200
160
120
80
40
0
Typical Distribution of Input
1140 UNITS
FROM THREE
RUNS
–40
Low Noise Op Amp
U
INPUT OFFSET VOLTAGE ( V)
Offset Voltage
–20
LT1012A/LT1012
Microvolt Offset,
0
20
V
T
V
S
A
CM
LT1012A • TA02
= 15V
= 25 C
= 0V
40
sn1012 1012afbs
1

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lt1012a Summary of contents

Page 1

... OUT R1 TO R6: VISHAY 444 ACCUTRACT THIN FILM SIP NETWORK X : VISHAY 444 PIN NUMBERS VISHAY INTERTECHNOLOGY, INC 63 LINCOLN HIGHWAY MALVERN, PA 19355 LT1012A • TA01 LT1012A/LT1012 Picoamp Input Current, Microvolt Offset, Low Noise Op Amp U Typical Distribution of Input Offset Voltage 200 1140 UNITS V ...

Page 2

... Consult LTC Marketing for parts specified with wider operating temperature ranges (Note 1) Operating Temperature Range LT1012AM/LT1012M (OBSOLETE)....– 125 C LT1012I/LT1012AI ............................. – LT1012AC/LT1012C LT1012D/LT1012S8 ................................ Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 ...

Page 3

... R 10k 300 2000 L = 10V 300 1000 L = 13.5V 114 132 = 1.2V to 20V 114 132 13 10k 13 14 0.1 0.2 370 500 380 600 LT1012A/LT1012 = 25 C, unless otherwise noted. A LT1O12M/I LT1O12C MIN TYP MAX MIN TYP MAX 120 0.3 0.3 15 100 20 150 25 150 30 200 ...

Page 4

... LT1012A/LT1012 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS V Input Offset Voltage OS (Note 3) Long Term Input Offset Voltage Stability l Input Offset Current OS (Note 3) I Input Bias Current B (Note 3) e Input Noise Voltage 0.1Hz to 10Hz n e Input Noise Voltage Density lnput Noise Current Density ...

Page 5

... ELECTRICAL CHARACTERISTICS temperature range of – 125 C for LT1012AM and LT1012M, and – 15V 0V, unless otherwise noted SYMBOL PARAMETER V Input Offset Voltage OS Average Temperature Coefficient of Input Offset Voltage I Input Offset Current OS Average Temperature Coefficient of Input Offset Current ...

Page 6

... S CM CONDITIONS MIN (Note 3) (Note 3) (Note 12V, R 10k 200 OUT 10V 200 OUT 13.5V 110 1.3V to 20V 110 S 13 10k 13 L LT1012AC LT1012C TYP MAX MIN TYP MAX 100 30 160 30 200 0.2 0.6 0.2 1.0 25 230 35 230 40 300 45 300 0.3 2.5 0.3 2.5 35 230 ...

Page 7

... OUT The LT1012 is internally compensated for unity gain stability. The overcompensation capacitor used to improve capacitive load handling capability, to narrow noise bandwidth stabilize circuits with gain LT1012A • EC01 in the feedback loop. LT1012A/LT1012 LT1012D LT1012S8 TYP MAX MIN TYP ...

Page 8

... INPUT OFFSET CURRENT (pA) Offset Voltage Drift vs Source Resistance (Balanced or Unbalanced) 100 10 12 1.0 MAXIMUM TYPICAL 0 10k 100k 1M SOURCE RESISTANCE ( ) LT1012A * TPC5 Offset Voltage Drift with Temperature of Four Representative Units –20 –40 –60 5 – –25 0 TEMPERATURE ( C) 1020 UNITS FROM THREE ...

Page 9

... Voltage Gain vs Load Resistance 10M 100 V = 15V 10V 0 120 3M 140 1M 160 300k 180 100k 200 LOAD RESISTANCE ( 10Hz AT 1kHz LT1012A • TPC12 100k 1M LT1012A • TPC15 – 125 LT1012A • TPC18 sn1012 1012afbs 9 ...

Page 10

... A = 1000 0.1 0.01 1 0.001 10,000 1 10 100 1 FREQUENCY (Hz) MIN 400k 300k R = 10k 200k L 100k 0 – 100 125 TEMPERATURE ( C) LT1012A • TPC23 sn1012 1012afbs 1mA 15V 100 LT1012A • TPC21 ...

Page 11

... Although the OP- copy of the LT1012, the LT1012 directly replaces and upgrades OP-97 applications. The LT1012C and D have lower offset voltage and drift than the OP-97F. The LT1012A has lower supply current than the OP-97A/E. In addition, all LT1012 grades guarantee operation at 1.2V supplies. ...

Page 12

... LT1012 3 33k + 4 Q4 –15V PIN 13 CA3146 Pulse Response of Feedforward Compensation Photo o OUT 5 s/DIV 10k 15V Q3 R1 100 A 2k METER 1.2k 100pA 549 RANGE Q2 LT1004C 1nA 549 10nA 549 100nA 549 1 A 549 10 A 549 100 A LT1012A • TA03 sn1012 1012afbs ...

Page 13

... NOISE IS A FRACTION OF A ppm. UNPROTECTED GATE MOSFET ISOLATES STANDARD CELL ON POWER DOWN Amplifier for Bridge Transducers R5 56M + 100k R1 R3 100k 510k 2 – R4 LT1012 510k 100k 100k 56M LT1012A/LT1012 15V 6 OUT LT1012A • TA05 6 OUT VOLTAGE GAIN 100 LT1012A • TA06 sn1012 1012afbs 13 ...

Page 14

... LT1012A • TA09 7k 200 2N3904 LT1012 2 – 1k* 6.5k 1k *THE 1k PRELOAD MINIMIZES GLITCHES INDUCED BY TRANSIENT LOADS LT1012A • TA08 5V 1k 100k 330k 7 10k 2 OUT – 620k 1 6 2N3904 LT1012 10k 3 100k –5V LT1012A • TA10 sn1012 1012afbs OUT 10V ...

Page 15

... 100k Input Amplifier for 4.5 Digit Voltmeter IN 0. OUT 1V 9M 10V 900k 100V 90k 1000V LT1012A • TA11 10k “No Trims” 12-Bit Multiplying DAC Output Amplifier 6 V OUT REFERENCE IN 0.1V TO 10V R3 R2 LT1012 • TA13 LT1012A/LT1012 15V 2 7 – 0.1V 6 ...

Page 16

... Q14 Q22 2.5k Q21 S Q24 Q11 Q23 50k 1.5k J1 Q12 Q31 3.7k Q19 20k 3.3k 3.3k Q34 3.7k 3.7k Q20 Q30 Q29 1.5k Q43 Q25 Q27 Q37 40 100 40 1.5k Q28 Q38 Q26 Q42 Q33 Q32 Q40 Q36 Q41 Q35 320 40 16k 330 + V 7 OUT 6 LT1012A • SD01 sn1012 1012afbs ...

Page 17

... STANDOFF * LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND THE SEATING PLANE ** FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (0.406 – 0.610) OBSOLETE PACKAGE LT1012A/LT1012 .165 – .185 (4.191 – 4.699) REFERENCE PLANE GAUGE .500 – .750 PLANE (12.700 – 19.050) ...

Page 18

... LT1012A/LT1012 PACKAGE DESCRIPTIO .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 +0.889 8.255 –0.381 NOTE: 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) ...

Page 19

... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. LT1012A/LT1012 .189 – .197 (4.801 – 5.004) ...

Page 20

... IN THE ORDER INDICATED POSITIVE FEEDBACK (R1) LINEARIZES THE INHERENT PARABOLIC NONLINEARITY OF THE PLATINUM SENSOR AND REDUCES ERRORS FROM 1 0.004 C OVER THE – 150 C RANGE LT1012A • TA04 sn1012 1012afbs LW/TP 1202 1K REV B • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1991 ...

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