LT1112/LT1114
Dual/Quad Low Power
Precision, Picoamp Input Op Amps
FEATURES
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■
■
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DESCRIPTIO
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: 0.3µV
P-P
, 2.2pA
P-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
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
APPLICATIO S
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Picoampere/Microvolt Instrumentation
Two and Three Op Amp Instrumentation Amplifers
Thermocouple and Bridge Amplifiers
Low Frequency Active Filters
Photo Current Amplifiers
Battery-Powered Systems
TYPICAL APPLICATIO
Dual Output, Buffered Reference (On Single 3V Supply)
TOTAL SUPPLY CURRENT = 700µA
2V REFERENCE: SOURCES 1.7mA, SINKS 5mA
R
X
OPTIONAL R
X
= 300Ω INCREASES SOURCE
CURRENT TO 5mA
0.765V REFERENCE: SOURCES 5mA,
SINKS 0.5mA
TEMPERATURE COEFFICIENT LIMITED
BY REFERENCE = 20ppm/°C
2.000V
MINIMUM SUPPLY = 2.7V
3V
30
25
15k
PERCENT OF UNITS
75k
0.1%
LT1004-1.2
46.4k
0.1%
+
5
–
6
+
3
–
2
20
15
10
5
8
1
1/2 LT1112
1/2 LT1112
4
7
0.765V
0
–70 –50
LT1112/14 • TA01
U
Distribution of Input Offset Voltage
(In All Packages)
V
S
=
±15V
T
A
= 25°C
50
30
–30 –10 10
INPUT OFFSET VOLTAGE (µV)
70
LT1112/14 • TA02
U
U
111214fb
1
LT1112/LT1114
ABSOLUTE
AXI U
RATI GS
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
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
4
B
5
N8 PACKAGE
8-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 130°C/W
J8 PACKAGE 8-LEAD CERDIP
T
JMAX
= 160°C,
θ
JA
= 100°C/W
8
A
7
6
V
+
ORDER PART
NUMBER
TOP VIEW
OUT B
–IN B
+IN B
LT1112ACN8
LT1112CN8
LT1112IN8
LT1112AMJ8
LT1112MJ8
ORDER PART
NUMBER
LT1114ACN
LT1114CN
LT1114IN
OBSOLETE PACKAGE
Consider the N8 Package for Alternate Source
TOP VIEW
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
1
2
3
4
5
6
7
N PACKAGE
14-LEAD PDIP
T
JMAX
= 150°C,
θ
JA
= 110°C/W
J PACKAGE 14-LEAD CERDIP
T
JMAX
= 160°C,
θ
JA
= 80°C/W (J)
14 OUT D
A
13 –IN D
D
12 +IN D
11 V
–
B
C
10 +IN C
9
8
–IN C
OUT C
OBSOLETE PACKAGE
Consider the N Package for Alternate Source
LT1114AMJ
LT1114MJ
Consult LTC Marketing for parts specified with wider operating temperature ranges.
111214fb
2
U
U
W
W W
U
W
(Note 1)
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
ORDER PART
NUMBER
8
V
+
OUT B
–IN B
+IN B
OUT A 1
–IN A 2
+IN A 3
V
–
4
B
A
7
6
5
LT1112S8
LT1112IS8
LT1112MPS8
S8 PART MARKING
1112
1112I
1112MP
ORDER PART
NUMBER
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 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
B
C
A
D
16 OUT D
15 –IN D
14 +IN D
13 V
–
12 +IN C
11 –IN C
10 OUT C
9
NC
LT1114S
LT1114IS
S PACKAGE
16-LEAD PLASTIC SO (NARROW)
T
JMAX
= 150°C,
θ
JA
= 150°C/W
LT1112/LT1114
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OS
∆V
OS
∆Time
I
OS
I
B
e
n
Input Offset Voltage
Long Term Input Offset
Voltage Stability
Input Offset Current
LT1114S/LT1114IS
Input Bias Current
LT1114S/LT1114IS
Input Noise Voltage
Input Noise Voltage Density
i
n
Input Noise Current
Input Noise Current Density
V
CM
CMRR
PSRR
R
IN
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Minimum Supply Voltage
Input Resistance
Differential Mode
Common Mode
Large-Signal Voltage Gain
Output Voltage Swing
Slew Rate
Gain-Bandwidth Product
Supply Current per Amplifier
V
S
=
±1.0V
Channel Separation
∆V
OS
∆I
B+
∆CMRR
∆PSRR
Offset Voltage Match
Noninverting Bias Current Match
(Notes 6, 7)
Common Mode Rejection Match
Power Supply Rejection Match
f
O
= 10Hz
(Note 6)
LT1114S/LT1114IS
(Notes 6, 8)
(Notes 6, 8)
f
O
= 10kHz
V
CM
=
±13.5V
V
S
=
±1.0V
to
±20V
(Note 5)
(Note 4)
V
S
=
±15V,
V
CM
= 0V, T
A
= 25°C, unless otherwise noted.
LT1112AM/AC
LT1114AM/AC
MIN TYP MAX
20
40
0.3
50
±70
180
±250
0.9
28
18
60
110
CONDITIONS (Note 3)
V
S
=
±1.0V
LT1112M/C/I
LT1114M/C/I
MIN TYP MAX
25
45
0.3
60
75
±80
±100
0.3
16
14
2.2
0.030
0.008
±13.5
115
114
±1.0
±14.3
136
126
230
330
±280
±450
0.9
28
18
75
130
UNITS
µV
µV
µV/Mo
pA
pA
pA
pA
µV
P-P
nV/√Hz
nV/√Hz
pA
P-P
pA/√Hz
pA/√Hz
V
dB
dB
V
0.1Hz to 10Hz (Note 10)
f
O
= 10Hz (Note 10)
f
O
= 1000Hz (Note 10)
0.1Hz to 10Hz
f
O
= 10Hz
f
O
= 1000Hz
±13.5
120
116
±1.0
20
1000
800
±13.0
±11.0
0.16
450
0.3
16
14
2.2
0.030
0.008
±14.3
136
126
50
800
5000
1500
±14.0
±12.4
0.30
750
350
320
150
35
100
100
450
400
370
15
800
600
±13.0
±11.0
0.16
450
40
700
5000
1300
±14.0
±12.4
0.30
750
350
320
150
40
100
120
130
500
680
450
420
MΩ
GΩ
V/mV
V/mV
V
V
V/µs
kHz
µA
µA
dB
µV
pA
pA
dB
dB
A
VOL
V
OUT
SR
GBW
I
S
V
O
=
±12V,
R
L
= 10kΩ
V
O
=
±10V,
R
L
= 2kΩ
R
L
= 10kΩ
R
L
= 2kΩ
117
114
136
130
113
112
136
130
111214fb
3
LT1112/LT1114
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OS
∆V
OS
∆Temp
I
OS
I
B
V
CM
CMRR
PSRR
A
VOL
V
OUT
SR
I
S
∆V
OS
Input Offset Voltage
LT1112MPS8
V
S
=
±1.2V
Average Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing
Slew Rate
Supply Current per Amplifier
Offset Voltage Match (Note 6)
LT1112MPS8
Offset Voltage Match Drift
(Notes 6, 9)
∆I
B+
∆CMRR
∆PSRR
Noninverting Bias Current Match
Common Mode Rejection Ratio
Power Supply Rejection Ratio
LT1112MPS8
(Notes 6, 7)
(Notes 6, 8)
(Notes 6, 8)
V
CM
=
±13.5V
(Note 9)
LT1112MPS8
The
●
denotes the specifications which apply over the full operating
temperature range of – 55°C
≤
T
A
≤
125°C, otherwise specifications are at T
A
= 25°C. V
S
=
±15V,
unless otherwise noted.
LT1112AMJ8
LT1114AMJ
MIN TYP MAX
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
CONDITIONS (Note 3)
LT1112MJ8/MPS8
LT1114MJ
MIN TYP MAX
45
45
70
0.20
0.4
100
±170
±13.5
111
110
400
170
0.12
±14.1
130
124
2500
500
0.22
380
70
70
0.3
0.5
170
106
106
130
126
530
240
270
1.0
1.9
850
150
160
260
0.75
1.3
500
±700
UNITS
µV
µV
µV
µV/°C
µV/°C
pA
pA
V
dB
dB
V/mV
V/mV
V
V/µs
µA
µV
µV
µV/°C
µV/°C
pA
dB
dB
35
60
0.15
80
±150
±13.5
116
112
500
200
0.12
±14.1
130
124
2500
600
0.22
380
55
0.2
150
112
109
130
126
120
220
0.5
400
±600
V
S
=
±1.2V
to
±20V
V
O
=
±12V,
R
L
= 10kΩ
V
O
=
±10V,
R
L
= 2kΩ
R
L
= 10kΩ
±13.0 ±13.85
460
200
0.7
750
±13.0 ±13.85
The
●
denotes the specifications which apply over the full operating temperature range of 0°C
≤
T
A
≤
70°C, otherwise specifications
are at T
A
= 25°C. V
S
=
±15V,
unless otherwise noted.
LT1112ACN8
LT1114ACN
MIN TYP MAX
●
●
●
●
●
●
●
●
●
●
SYMBOL PARAMETER
V
OS
∆V
OS
∆Temp
I
OS
I
B
V
CM
CMRR
PSRR
A
VOL
V
OUT
SR
Input Offset Voltage
CONDITIONS (Note 3)
LT1112CN8
LT1112S8, LT1114CN/S
V
S
=
±1.2V
LT1112CN8
LT1112S8, LT1114CN/S
LT1114S
LT1112CN8/S8/IS8
LT1114CN/S/IS
MIN TYP MAX
30
45
65
0.2
0.4
70
90
±90
±115
±13.5
113
112
650
400
±13.0
0.14
±
14.2
133
125
4000
1000
±13.9
0.27
125
150
210
0.75
1.3
290
420
±350
±550
UNITS
µV
µV
µV
µV/°C
µV/°C
pA
pA
pA
pA
V
dB
dB
V/mV
V/mV
V
V/µs
111214fb
27
35
50
0.15
0.3
60
±80
±13.5
118
114
800
500
±13.0
0.14
±14.2
133
125
4000
1300
±13.9
0.27
100
125
175
0.5
1.1
220
±300
Average Input Offset Voltage Drift
(Note 9)
Input Offset Current
Input Bias Current
LT1114S
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing
Slew Rate
V
CM
=
±13.5V
V
S
=
±1.2V
to
±20V
V
O
=
±12V,
R
L
= 10kΩ
V
O
=
±10V,
R
L
= 2kΩ
R
L
= 10kΩ
●
●
●
●
●
●
4
LT1112/LT1114
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
I
S
∆V
OS
Supply Current per Amplifier
Offset Voltage Match
(Note 6)
Offset Voltage Match Drift
(Notes 6, 9)
∆I
B+
∆CMRR
∆PSRR
Noninverting Bias Current Match
(Notes 6, 7)
Common Mode Rejection Ratio
Power Supply Rejection Ratio
The
●
denotes the specifications which apply over the full operating
temperature range of 0°C
≤
T
A
≤
70°C, otherwise specifications are at T
A
= 25°C. V
S
=
±15V,
unless otherwise noted.
LT1112ACN8
LT1114ACN
MIN TYP MAX
●
CONDITIONS (Note 3)
LT1112CN8
LT1112S8, LT1114CN/S
LT1112N8
LT1112S8, LT1114CN/S
LT1114S
(Notes 6, 8)
(Notes 6, 8)
●
●
●
●
●
●
●
●
LT1112CN8/S8/IS8
LT1114CN/S/IS
MIN TYP MAX
370
55
70
0.3
0.5
135
160
109
108
134
128
500
210
270
1.0
1.9
620
880
UNITS
µA
µV
µV
µV/°C
µV/°C
pA
pA
dB
dB
370
45
55
0.2
0.4
120
114
110
134
128
440
170
220
0.7
1.6
530
The
●
denotes the specifications which apply over the full operating temperature range of –40°C
≤
T
A
≤
85°C, otherwise specifications
are at T
A
= 25°C. V
S
=
±15V,
unless otherwise noted. (Note 12)
LT1112ACN8
LT1112CN8/IN8/S8/IS8
LT1114ACN
LT1114CN/S/IS
MIN TYP MAX MIN TYP MAX
●
●
●
●
●
●
●
●
●
●
SYMBOL PARAMETER
V
OS
∆V
OS
∆Temp
I
OS
I
B
V
CM
CMRR
PSRR
A
VOL
V
OUT
SR
I
S
∆V
OS
Input Offset Voltage
CONDITIONS (Note 3)
LT1112CN8/IN8
LT1112S8/IS8, LT1114CN/S/IS
V
S
=
±1.2V
LT1112CN8/IN8
LT1112S8/IS8, LT1114CN/S/IS
LT1114S/IS
UNITS
µV
µV
µV
µV/°C
µV/°C
pA
pA
pA
pA
V
dB
dB
V/mV
V/mV
V
V/µs
30
40
55
0.15
0.30
70
±110
±13.5
117
113
700
400
0.13
±14.1
132
125
3300
1100
0.24
370
50
60
0.2
0.4
140
113
110
133
127
110
135
200
0.50
1.10
330
±500
±13.5
112
111
600
300
0.13
450
180
230
0.7
1.6
660
109
107
35
45
60
0.20
0.40
85
110
±120
±150
±14.1
132
125
3300
900
0.24
370
60
70
0.3
0.5
155
190
133
127
135
160
240
0.75
1.30
400
600
±550
±800
Average Input Offset Voltage Drift
Input Offset Current
Input Bias Current
LT1114S/IS
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Output Voltage Swing
Slew Rate
Supply Current per Amplifier
Offset Voltage Match
(Note 6)
Offset Voltage Match Drift
(Notes 6)
∆I
B+
∆CMRR
∆PSRR
Noninverting Bias Current Match
(Notes 6, 7)
Common Mode Rejection Ratio
Power Supply Rejection Ratio
LT1112CN8/IN8
LT1112S8/IS8, LT1114CN/S/IS
LT1112CN8/IN8
LT1112S8/IS8, LT1114CN/S/IS
LT1114S/IS
(Notes 6, 8)
(Notes 6, 8)
V
CM
=
±13.5V
V
S
=
±1.2V
to
±20V
V
O
=
±12V,
R
L
= 10kΩ
V
O
=
±10V,
R
L
= 2kΩ
R
L
= 10kΩ
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
±13.0 ±13.85
±13.0 ±13.85
510
225
270
1.0
1.9
770
1300
µA
µV
µV
µV/°C
µV/°C
pA
pA
dB
dB
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
Differential input voltages greater than 1V will cause excessive
current to flow through the input protection diodes unless limiting
resistance is used.
Note 3:
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 4:
This parameter is guaranteed by design and is not tested.
111214fb
5
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