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PDF LT1114 Data sheet ( Hoja de datos )
| Número de pieza | LT1114 | |
| Descripción | Dual/Quad Low Power Precision/ Picoamp Input Op Amps | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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LT1112/LT1114
Dual/Quad Low Power
Precision, Picoamp Input Op Amps
FEATURES
s S8 Package – Standard Pinout
s Offset Voltage – Prime Grade: 60µV Max
s Offset Voltage – Low Cost Grade
(Including Surface Mount Dual/Quad): 75µV Max
s Offset Voltage Drift: 0.5µV/°C Max
s Input Bias Current: 250pA Max
s 0.1Hz to 10Hz Noise: 0.3µVP-P, 2.2pAP-P
s Supply Current per Amplifier: 400µA Max
s CMRR: 120dB Min
s Voltage Gain: 1 Million Min
s Guaranteed Specs with ±1.0V Supplies
s Guaranteed Matching Specifications
s LT1114 in Narrow Surface Mount Package
APPLICATI S
s Picoampere/Microvolt Instrumentation
s Two and Three Op Amp Instrumentation Amplifers
s Thermocouple and Bridge Amplifiers
s Low Frequency Active Filters
s Photo Current Amplifiers
s Battery-Powered Systems
DESCRIPTIO
The LT1112 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.
Protected by U.S. Patents 4,575,685; 4,775,884 and 4,837,496
Dual Output, Buffered Reference (On Single 3V Supply)
75k
0.1%
15k
2– 8
1/2 LT1112
3+
LT1004-1.2
3V TOTAL SUPPLY CURRENT = 700µA
2V REFERENCE: SOURCES 1.7mA, SINKS 5mA
RX OPTIONAL RX = 300Ω INCREASES 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
1
1 page  
LT1112/LT1114
ELECTRICAL CHARACTERISTICS VS = ±15V, –40°C ≤ TA ≤ 85°C, (Note 10)
SYMBOL PARAMETER
VOS Input Offset Voltage
∆VOS
∆Temp
IOS
Average Input Offset Voltage Drift
Input Offset Current
IB Input Bias Current
VCM
CMRR
PSRR
AVOL
Input Voltage Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
VOUT
SR
IS
∆VOS
∆IB+
∆CMRR
∆PSRR
Output Voltage Swing
Slew Rate
Supply Current per Amplifier
Offset Voltage Match
(Note 5)
Offset Voltage Match Drift
(Notes 5)
Noninverting Bias Current Match
(Notes 5, 6)
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
CONDITIONS (Note 2)
LT1112N8
LT1112S8, LT1114N/S
VS = ±1.2V
LT1112N8
LT1112S8, LT1114N/S
LT1114S
LT1114S
VCM = ±13.5V
VS = ±1.2V to ±20V
VO = ±12V, RL = 10kΩ
VO = ±10V, RL = 2kΩ
RL = 10kΩ
LT1112N8
LT1112S8, LT1114N/S
LT1112N8
LT1112S8, LT1114N/S
LT1114S
(Notes 5, 7)
(Notes 5, 7)
LT1112ACN8
LT1114ACN
LT1112N8/S8
LT1114CN/S
MIN TYP MAX MIN TYP MAX
q 30 110
q 40 135
q 55 200
35 135
45 160
60 240
q 0.15 0.50 0.20 0.75
q 0.30 1.10 0.40 1.30
q 70 330
85 400
q 110 600
q ±110 ±500 ±120 ±550
q ±150 ±800
q ±13.5 ±14.1
±13.5 ±14.1
q 117 132
112 132
q 113 125
111 125
q 700 3300
q 400 1100
600 3300
300 900
q ±13.0 ±13.85
±13.0 ±13.85
q 0.13 0.24
0.13 0.24
q 370 450
370 510
q 50 180
q 60 230
60 225
70 270
q 0.2 0.7
q 0.4 1.6
0.3 1.0
0.5 1.9
q 140 660
q
155 770
190 1300
q 113 133
109 133
q 110 127
107 127
UNITS
µV
µV
µV
µV/°C
µV/°C
pA
pA
pA
pA
V
dB
dB
V/mV
V/mV
V
V/µs
µA
µV
µV
µV/°C
µV/°C
pA
pA
dB
dB
The q denotes specifications which apply over the operating temperature
range.
Note 1: Differential input voltages greater than 1V will cause excessive
current to flow through the input protection diodes unless limiting
resistance is used.
Note 2: Typical parameters are defined as the 60% yield of parameter
distributions of individual amplifiers; i.e., out of 100 LT1114s (or 100
LT1112s) typically 240 op amps (or 120) will be better than the indicated
specification.
Note 3: This parameter is guaranteed by design and is not tested.
Note 4: Offset voltage, supply current and power supply rejection ratio are
measured at the minimum supply voltage.
Note 5: Matching parameters are the difference between amplifiers A and
D and between B and C on the LT1114; between the two amplifiers on the
LT1112.
Note 6: This parameter is the difference between two noninverting
input bias currents.
Note 7: ∆CMRR and ∆PSRR are defined as follows: (1) CMRR and
PSRR are measured in µV/V on the individual amplifiers. (2) The
difference is calculated between the matching sides in µV/V. (3) The
result is converted to dB.
Note 8: This parameter is not 100% tested.
Note 9: These parameters are not tested. More than 99% of the op
amps tested during product characterization have passed the
maximum limits. 100% passed at 1kHz.
Note 10: The LT1112/LT1114 are not tested and are not quality
assurance sampled at – 40°C and at 85°C. These specifications are
guaranteed by design, correlation and/or inference from – 55°C, 0°C,
25°C, 70°C and/or 125°C tests.
5
5 Page 
LT1112/LT1114
TYPICAL APPLICATI
Dual Buffered ±0.617V Reference Powered by Two AA Batteries
15k
+
RX*
*OPTIONAL
1/2 LT1112
–
+1.5V
+0.617V
LT1004-1.2
100pF
1/2 LT1112
RY*
*OPTIONAL
–1.5V
20k
0.1%
20k
0.1%
TOTAL SUPPLY CURRENT = 700µA
WORKS WITH BATTERIES DISCHARGED
TO ±1.3V
AT ±1.5V: MAXIMUM LOAD CURRENT = 800µA;
CAN BE INCREASED WITH OPTIONAL RX, RY;
AT RX = RY = 750Ω LOAD CURRENT = 2mA
TEMPERATURE COEFFICIENT LIMITED BY
REFERENCE = 20ppm/°C
–0.617V
LT1112/14 • TA03
WW
SCHE ATIC DIAGRA (1/2 LT1112, 1/4 LT1114)
V+
INVERTING
INPUT
–
NONINVERTING
INPUT
+
12pF 30k 30k
Q35 Q34
800Ω
30pF
4k
35µA
20µA
Q22
Q19
Q5 Q6
S
Q1
S
Q2
Q9
Q10
15µA
V–
Q8
Q13
S
Q3
Q21
S
Q4
Q7
Q24
3k
Q11 Q23
50k 1.5k
Q12
J1
Q16
460Ω
10k
Q17
5µA
5µA
Q14 Q15
460Ω
460Ω
Q25
Q18
80µA
1.5k
Q27
Q29
2.5k
Q20
Q26
Q28
Q33
28Ω
90Ω OUT
30Ω
Q32
Q30
Q31
200Ω
200Ω
Q1 TO Q4 ARE SUPERGAIN TRANSISTORS LT1112/14 • SD01
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 circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT1114.PDF ] | |
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