LT1112/LT1114
Dual/Quad Low Power
Precision, Picoamp Input Op Amps
FEATURES
s
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DESCRIPTIO
s
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S8 Package – Standard Pinout
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
LT1114 in Narrow Surface Mount Package
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
APPLICATI
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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
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
8
1
20
15
10
5
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
UO
1
LT1112/LT1114
ABSOLUTE
AXI U
RATI GS
Operating Temperature Range
LT1112AM/LT1112M
LT1114AM/LT1114M ...................... – 55°C to 125°C
LT1112AC/LT1112C/LT1112S8
LT1114AC/LT1114C/LT1114S .......... – 40°C to 85°C
Supply Voltage .....................................................
±20V
Differential Input Current (Note 1) .....................
±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
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
4
J8 PACKAGE
8-LEAD CERAMIC DIP
B
5
+IN B
A
8
7
6
V
+
ORDER PART
NUMBER
LT1112AMJ8
LT1112MJ8
LT1112ACN8
LT1112CN8
OUT B
–IN B
N8 PACKAGE
8-LEAD PLASTIC DIP
T
JMAX
= 160°C,
θ
JA
= 100°C/W (J8)
T
JMAX
= 140°C,
θ
JA
= 130°C/W (N8)
TOP VIEW
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
1
2
3
4
5
6
7
B
C
A
D
14 OUT D
13 –IN D
12 +IN D
11 V
–
10 +IN C
9
8
–IN C
OUT C
ORDER PART
NUMBER
LT1114AMJ
LT1114MJ
LT1114ACN
LT1114CN
J PACKAGE
N PACKAGE
14-LEAD CERAMIC DIP 14-LEAD PLASTIC DIP
T
JMAX
= 160°C,
θ
JA
= 80°C/W (J)
T
JMAX
= 140°C,
θ
JA
= 110°C/W (N)
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
Input Bias Current
LT1114S
Input Noise Voltage
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
60
110
CONDITIONS (Note 2)
V
S
=
±1.0V
0.1Hz to 10Hz (Note 9)
2
U
U
W
W W
U
W
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
4
B
5
+IN B
A
8
7
6
V
+
ORDER PART
NUMBER
LT1112S8
PART MARKING
1112
ORDER PART
NUMBER
LT1114S
OUT B
–IN B
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 140°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
S PACKAGE
16-LEAD PLASTIC SO (NARROW)
T
JMAX
= 140°C,
θ
JA
= 150°C/W
LT1112M/C/S8
LT1114M/C/S
MIN TYP MAX
25
45
0.3
60
75
±80
±100
0.3
230
330
±280
±450
0.9
75
130
UNITS
µV
µV
µV/Mo
pA
pA
pA
pA
µV
P-P
0.3
LT1112/LT1114
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
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 5, 6)
Common-Mode Rejection Match
Power Supply Rejection Match
f
O
= 10Hz
(Note 5)
LT1114S
(Notes 5, 7)
(Notes 5, 7)
f
O
= 10kHz
V
CM
=
±13.5V
V
S
=
±1.0V
to
±20V
(Note 4)
(Note 3)
V
S
=
±15V,
V
CM
= 0V, T
A
= 25°C, unless otherwise noted.
LT1112AM/AC
LT1114AM/AC
MIN TYP MAX
16
14
2.2
0.030
0.008
±13.5
120
116
±1.0
20
1000
800
±13.0
±11.0
0.16
450
50
800
5000
1500
±14.0
±12.4
0.30
750
350
320
150
35
100
117
114
136
130
100
450
113
112
400
370
±14.3
136
126
±13.5
115
114
±1.0
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
136
130
130
500
680
450
420
28
18
CONDITIONS (Note 2)
f
O
= 10Hz (Note 9)
f
O
= 1000Hz (Note 9)
0.1Hz to 10Hz
f
O
= 10Hz
f
O
= 1000Hz
LT1112M/C/S8
LT1114M/C/S
MIN TYP MAX
16
14
2.2
0.030
0.008
±14.3
136
126
28
18
UNITS
nV/√Hz
nV/√Hz
pA
P-P
pA/√Hz
pA/√Hz
V
dB
dB
V
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
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OS
∆V
OS
∆Temp
I
OS
I
B
V
CM
CMRR
PSRR
A
VOL
Input Offset Voltage
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
V
CM
=
±13.5V
V
S
=
±1.2V
to
±20V
V
S
=
±15V,
– 55°C
≤
T
A
≤
125°C, unless otherwise noted.
LT1112AMJ8
LT1114AMJ
MIN TYP MAX
q
q
q
q
q
q
q
q
q
q
CONDITIONS (Note 2)
V
S
=
±1.2V
(Note 8)
LT1112MJ8
LT1114MJ
MIN TYP MAX
45
70
0.20
100
±170
±13.5
111
110
400
170
±14.1
130
124
2500
500
150
260
0.75
500
±700
UNITS
µV
µV
µV/°C
pA
pA
V
dB
dB
V/mV
V/mV
35
60
0.15
80
±150
±13.5
116
112
500
200
±14.1
130
124
2500
600
120
220
0.5
400
±600
V
O
=
±12V,
R
L
= 10kΩ
V
O
=
±10V,
R
L
= 2kΩ
3
LT1112/LT1114
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OUT
SR
I
S
∆V
OS
∆I
B+
∆CMRR
∆PSRR
Output Voltage Swing
Slew Rate
Supply Current per Amplifier
Offset Voltage Match
Offset Voltage Match Drift
Noninverting Bias Current Match
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
(Note 5)
(Notes 5, 8)
(Notes 5, 6)
(Notes 5, 7)
(Notes 5, 7)
V
S
=
±15V,
– 55°C
≤
T
A
≤
125°C, unless otherwise noted.
LT1112AMJ8
LT1114AMJ
MIN TYP MAX
q
q
q
q
q
q
q
q
CONDITIONS (Note 2)
R
L
= 10kΩ
LT1112MJ8
LT1114MJ
MIN TYP MAX
±13.0 ±13.85
0.12
0.22
380
70
0.3
170
106
106
130
126
530
240
1.0
850
UNITS
V
V/µs
µA
µV
µV/°C
pA
dB
dB
±13.0 ±13.85
0.12
0.22
380
55
0.2
150
112
109
130
126
460
200
0.7
750
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
V
S
=
±15V,
0°C
≤
T
A
≤
70°C, unless otherwise noted.
LT1112ACN8
LT1114ACN
MIN TYP MAX
q
q
q
q
q
q
q
q
q
q
CONDITIONS (Note 2)
LT1112N8
LT1112S8, LT1114N/S
V
S
=
±1.2V
LT1112N8
LT1112S8, LT1114N/S
LT1114S
LT1112N8/S8
LT1114CN/S
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
370
55
70
0.3
0.5
135
160
109
108
134
128
500
210
270
1.0
1.9
620
880
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
µA
µV
µV
µV/°C
µV/°C
pA
pA
dB
dB
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
370
45
55
0.2
0.4
120
114
110
134
128
100
125
175
0.5
1.1
220
±300
Average Input Offset Voltage Drift
(Note 8)
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
Supply Current per Amplifier
Offset Voltage Match
(Note 5)
Offset Voltage Match Drift
(Notes 5, 8)
∆I
B+
∆CMRR
∆PSRR
Noninverting Bias Current Match
(Notes 5, 6)
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
LT1112N8
LT1112S8, LT1114N/S
LT1112N8
LT1112S8, LT1114N/S
LT1114S
(Notes 5, 7)
(Notes 5, 7)
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
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
440
170
220
0.7
1.6
530
4
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
V
S
=
±15V,
– 40°C
≤
T
A
≤
85°C, (Note 10)
LT1112ACN8
LT1114ACN
MIN TYP MAX
q
q
q
q
q
q
q
q
q
q
CONDITIONS (Note 2)
LT1112N8
LT1112S8, LT1114N/S
V
S
=
±1.2V
LT1112N8
LT1112S8, LT1114N/S
LT1114S
LT1112N8/S8
LT1114CN/S
MIN TYP MAX
35
45
60
0.20
0.40
85
110
±120
±150
±13.5
112
111
600
300
0.13
±14.1
132
125
3300
900
0.24
370
60
70
0.3
0.5
155
190
109
107
133
127
510
225
270
1.0
1.9
770
1300
135
160
240
0.75
1.30
400
600
±550
±800
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
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
Average Input Offset Voltage Drift
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
Supply Current per Amplifier
Offset Voltage Match
(Note 5)
Offset Voltage Match Drift
(Notes 5)
∆I
B+
∆CMRR
∆PSRR
Noninverting Bias Current Match
(Notes 5, 6)
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
LT1112N8
LT1112S8, LT1114N/S
LT1112N8
LT1112S8, LT1114N/S
LT1114S
(Notes 5, 7)
(Notes 5, 7)
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
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
±13.0 ±13.85
450
180
230
0.7
1.6
660
±13.0 ±13.85
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
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