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Linear Technology Electronic Components Datasheet

LT1112 Datasheet

Picoamp Input Op Amps

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LT1112/LT1114
Dual/Quad Low Power
Precision, Picoamp Input Op Amps
FEATURES
Offset Voltage – Prime Grade: 60µV Max
Offset Voltage – Low Cost Grade
(Including Surface Mount Dual/Quad): 75µV Max
Offset Voltage Drift: 0.5µV/°C Max
Input Bias Current: 250pA Max
0.1Hz to 10Hz Noise: 0.3µVP-P, 2.2pAP-P
Supply Current per Amplifier: 400µA Max
CMRR: 120dB Min
Voltage Gain: 1 Million Min
Guaranteed Specs with ±1.0V Supplies
Guaranteed Matching Specifications
SO-8 Package – Standard Pinout
LT1114 in Narrow Surface Mount Package
U
APPLICATIO S
Picoampere/Microvolt Instrumentation
Two and Three Op Amp Instrumentation Amplifers
Thermocouple and Bridge Amplifiers
Low Frequency Active Filters
Photo Current Amplifiers
Battery-Powered Systems
DESCRIPTIO
The LT®1112 dual and LT1114 quad op amps achieve a
new standard in combining low cost and outstanding
precision specifications.
The performance of the selected prime grades matches or
exceeds competitive devices. In the design of the LT1112/
LT1114 however, particular emphasis has been placed on
optimizing performance in the low cost plastic and SO
packages. For example, the 75µV maximum offset voltage
in these low cost packages is the lowest on any dual or
quad non-chopper op amp.
The LT1112/LT1114 also provide a full set of matching
specifications, facilitating their use in such matching
dependent applications as two and three op amp instru-
mentation amplifiers.
Another set of specifications is furnished at ±1V supplies.
This, combined with the low 320µA supply current per
amplifier, allows the LT1112/LT1114 to be powered by
two nearly discharged AA cells.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Protected by U.S. Patents 4,575,685; 4,775,884 and 4,837,496
TYPICAL APPLICATIO
Dual Output, Buffered Reference (On Single 3V Supply)
75k
0.1%
15k
28
1/2 LT1112
3+
LT1004-1.2
3V TOTAL SUPPLY CURRENT = 700µA
2V REFERENCE: SOURCES 1.7mA, SINKS 5mA
RX OPTIONAL RX = 300INCREASES SOURCE
CURRENT TO 5mA
0.765V REFERENCE: SOURCES 5mA,
SINKS 0.5mA
TEMPERATURE COEFFICIENT LIMITED
1 2.000V BY REFERENCE = 20ppm/°C
MINIMUM SUPPLY = 2.7V
46.4k
0.1%
6
1/2 LT1112
5+
4
7
0.765V
LT1112/14 • TA01
Distribution of Input Offset Voltage
(In All Packages)
30
VS = ±15V
TA = 25°C
25
20
15
10
5
0
–70 –50 –30 –10 10 30 50
INPUT OFFSET VOLTAGE (µV)
70
LT1112/14 • TA02
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1


Linear Technology Electronic Components Datasheet

LT1112 Datasheet

Picoamp Input Op Amps

No Preview Available !

LT1112/LT1114
ABSOLUTE AXI U RATI GS (Note 1)
Supply Voltage ..................................................... ±20V
Differential Input Current (Note 2) ..................... ±10mA
Input Voltage (Equal to Supply Voltage) ............... ±20V
Output Short-Circuit Duration ......................... Indefinite
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................ 300°C
Operating Temperature Range (Note 11)
LT1112AM/LT1112M
LT1114AM/LT1114M (OBSOLETE)... – 55°C to 125°C
LT1112AC/LT1112C/LT1112S8
LT1114AC/LT1114C/LT1114S .......... – 40°C to 85°C
LT1112I/LT1114I .............................. – 40°C to 85°C
LT1112MPS8 ................................... –55°C to 125°C
Specified Temperature Range (Note 12)
LT1112AM/LT1112M
LT1114AM/LT1114M (OBSOLETE) ... – 55°C to 125°C
LT1112AC/LT1112C/LT1112S8
LT1114AC/LT1114C/LT1114S .......... – 40°C to 85°C
LT1112I/LT1114I .............................. – 40°C to 85°C
LT1112MPS8 ................................... –55°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
OUT A 1
TOP VIEW
8 V+
ORDER PART
NUMBER
–IN A 2
+IN A 3
V4
A
7 OUT B
6 –IN B
B
5 +IN B
N8 PACKAGE
8-LEAD PDIP
LT1112ACN8
LT1112CN8
LT1112IN8
TJMAX = 150°C, θJA = 130°C/W
J8 PACKAGE 8-LEAD CERDIP
TJMAX = 160°C, θJA = 100°C/W
LT1112AMJ8
LT1112MJ8
OBSOLETE PACKAGE
Consider the N8 Package for Alternate Source
OUT A 1
TOP VIEW
14 OUT D
ORDER PART
NUMBER
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
A
B
13 –IN D
D
12 +IN D
11 V
10 +IN C
C
9 –IN C
LT1114ACN
LT1114CN
LT1114IN
OUT B 7
8 OUT C
N PACKAGE
14-LEAD PDIP
TJMAX = 150°C, θJA = 110°C/W
J PACKAGE 14-LEAD CERDIP
TJMAX = 160°C, θJA = 80°C/W (J)
OBSOLETE PACKAGE
LT1114AMJ
LT1114MJ
Consider the N Package for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
2
OUT A 1
–IN A 2
+IN A 3
V4
TOP VIEW
8 V+
7 OUT B
A
6 –IN B
B
5 +IN B
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 190°C/W
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
NC 8
A
B
16 OUT D
15 –IN D
D
14 +IN D
13 V
12 +IN C
C
11 –IN C
10 OUT C
9 NC
S PACKAGE
16-LEAD PLASTIC SO (NARROW)
TJMAX = 150°C, θJA = 150°C/W
ORDER PART
NUMBER
LT1112S8
LT1112IS8
LT1112MPS8
S8 PART MARKING
1112
1112I
1112MP
ORDER PART
NUMBER
LT1114S
LT1114IS
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Part Number LT1112
Description Picoamp Input Op Amps
Maker Linear
Total Page 16 Pages
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