LT1494/LT1495/LT1496
1.5µA Max, Single, Dual
and Quad Over-The-Top Precision
Rail-to-Rail Input and Output Op Amps
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Low Supply Current: 1.5
µ
A Max
Rail-to-Rail Input and Output
Low Offset Voltage: 375
µ
V Max
Operating Temperature Range: – 40
°
C to 125
°
C
Over-The-Top
TM
Inputs Operate Above V
+
Wide Supply Range: 2.2V to 36V
Single Supply Input Range: – 0.3V to 36V
Low Input Bias Current: 250pA
Low Input Offset Current: 20pA
High A
VOL
: 100V/mV Minimum Driving 100kΩ Load
Output Sources and Sinks 500µA Load Current
Reverse Battery Protected to 18V
The LT
®
1494/LT1495/LT1496 are the lowest power
(I
S
≤
1.5µA) op amps with precision specifications. The
extremely low supply current is combined with excellent
amplifier specifications: input offset voltage is 375µV
maximum with a typical drift of only 0.4µV/°C, input offset
current is 100pA maximum. A minimum open-loop gain
(A
VOL
) of 100V/mV ensures that gain errors are small. The
device characteristics change little over the supply range
of 2.2V to
±15V.
Supply rejection is 90dB and the common
mode rejection ratio is 90dB. Operation is specified for 3V,
5V and
±15V
supplies. Reverse battery protection
(–18V min) and inputs that operate above the positive
supply make the LT1494/LT1495/LT1496 easy to use in
harsh environments.
The low bias currents and offset current of the amplifier
permit the use of megohm level source resistors without
introducing significant errors. Voltage noise at 4µV
P-P
is
remarkably low considering the low supply current.
The LT1494 is available in the 8-Pin MSOP, PDIP and SO
packages.The LT1495 is available in plastic 8-Pin PDIP
and SO packages with the standard dual op amp pinout.
The LT1496 is available in 14-Pin SO and PDIP packages.
APPLICATIO S
s
s
s
s
Battery- or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplifier
Micropower Filter
, LTC and LT are registered trademarks of Linear Technology Corporation.
Over-The-Top is a trademark of Linear Technology Corporation.
TYPICAL APPLICATION
Micropower Integrating Current Sense
RESET
0.1µF
V
CC
R
I
1M
R
S
0.1Ω 1M
I
L
LOAD
10M
V
CC
200k
10M
1495 TA01
30
25
20
100 AMPLIFIERS
V
S
=
±2.5V
–40°C TO 85°C
1/2 LT1495
–
1/2 LT1495
V
O
UNITS
–
+
15
10
5
0
– 2.0 –1.6 –1.2 –0.8 –0.4 0 0.4 0.8 1.2 1.6 2.0
TC V
OS
(µV/°C)
1495 TA02
+
R
I
C = (4.9A)(SEC) FOR V
CC
= 5V
R
S
I
S
= 3µA DURING INTEGRATION; I
S
= 5µA END OF INTEGRATION
OUTPUT SWITCHES
WHEN I
L
dt = 0.98 V
CC
( )
U
TC V
OS
Distribution
U
U
1
LT1494/LT1495/LT1496
ABSOLUTE
MAXIMUM
RATINGS
(Note 1)
Total Supply Voltage (V
+
to V
–
) .............................. 36V
Differential Input Voltage ......................................... 36V
Input Current ......................................................
±10mA
Output Short-Circuit Duration ....................... Continuous
Operating Temperature Range (Note 2)
LT1494C/LT1495C/LT1496C .............. – 40°C to 85°C
LT1494I/LT1495I/LT1496I ................. – 40°C to 85°C
LT1494H/LT1495H/LT1496H ........... – 40°C to 125°C
Specified Temperature Range (Note 3)
LT1494C/LT1495C/LT1496C .............. – 40°C to 85°C
LT1494I/LT1495I/LT1496I ................. – 40°C to 85°C
LT1494H/LT1495H/LT1496H ........... – 40°C to 125°C
Storage Temperature Range ................. – 65°C to 150°C
Junction Temperature ........................................... 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
ORDER PART
NUMBER
TOP VIEW
NC
–IN
+IN
V
–
1
2
3
4
8 NC
7 V
+
6 OUT
5 NC
TOP VIEW
NC 1
–IN 2
+IN 3
V
–
4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
NC
V
+
OUT
NC
LT1494CMS8
LT1494IMS8
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 250°C/ W
MS8 PART MARKING
LTFF
LTFG
ORDER PART
NUMBER
TOP VIEW
OUT A 1
–IN A 2
A
+IN A 3
V
–
4
N8 PACKAGE
8-LEAD PDIP
B
5
8
7
6
V
+
OUT B
–IN B
+IN B
LT1495CN8
LT1495CS8
LT1495IN8
LT1495IS8
LT1495HS8
S8 PART MARKING
1495
1495I
1495H
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 130°C/ W (N8)
T
JMAX
= 150°C,
θ
JA
= 190°C/ W (S8)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
2
U
U
W
W W
U
W
ORDER PART
NUMBER
LT1494CN8
LT1494CS8
LT1494IN8
LT1494IS8
LT1494HS8
S8 PART MARKING
1494
1494I
1494H
ORDER PART
NUMBER
14 OUT D
13 –IN D
12 +IN D
11 V
–
10 +IN C
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 130°C/ W (N8)
T
JMAX
= 150°C,
θ
JA
= 190°C/ W (S8)
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
9
8
–IN C
OUT C
LT1496CN
LT1496CS
LT1496IN
LT1496IS
LT1496HS
N PACKAGE
14-LEAD PDIP
S PACKAGE
14-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 130°C/ W (N)
T
JMAX
= 150°C,
θ
JA
= 160°C/ W (S)
LT1494/LT1495/LT1496
ELECTRICAL CHARACTERISTICS
T
A
= 25°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
= half supply, unless otherwise noted.
SYMBOL PARAMETER
Input Offset Voltage
V
OS
CONDITIONS
V
S
= 5V
V
S
= 3V
V
S
= 5V, MS8 Package
V
S
= 3V, MS8 Package
(Note 5)
V
CM
= 10V (Note 6)
(Note 5)
0.1Hz to 10Hz
f = 100Hz
f = 100Hz
V
S
= 5V, V
O
= 0.25V to 4.5V, R
L
= 100k
V
S
= 3V, V
O
= 0.25V to 2.5V, R
L
= 100k
V
CM
= 0V to 4V, V
S
= 5V
V
CM
= 0V to 10V, V
S
= 5V
V
S
= 2.2V to 12V, V
CM
= V
O
= 0.5V
No Load
I
SINK
= 100µA
No Load
I
SOURCE
= 100µA
(Note 5)
(Note 6)
I
S
= 10µA per Amplifier
A
V
= –1, V
S
=
±5V
f = 100Hz
MIN
TYP
150
200
150
200
250
180
20
4
185
10
500
250
106
95
99
2.1
50
210
+
– 0.035
V
V
+
– 0.160
1.3
1.0
1.0
2.7
MAX
375
475
475
575
1000
360
100
UNITS
µV
µV
µV
µV
pA
nA
pA
µV
P-P
nV/√Hz
fA/√Hz
V/mV
V/mV
V
dB
dB
dB
V
mV
mV
V
V
mA
µA
V
V/ms
kHz
I
B
I
OS
e
n
i
n
A
VOL
Input Bias Current
Input Offset Current
Input Noise Voltage
Input Noise Voltage Density
Input Noise Current Density
Large-Signal Voltage Gain
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Minimum Operating Supply Voltage
Output Voltage Swing LOW
Output Voltage Swing HIGH
Short-Circuit Current
Supply Current per Amplifier
Reverse Supply Voltage
Slew Rate
Gain Bandwidth Product
CMRR
PSRR
V
OL
V
OH
I
SC
I
S
SR
GBW
100
50
0
90
74
90
36
2.2
100
410
V
+
– 0.07
V
+
– 0.32
0.7
–18
0.4
1.5
3
LT1494/LT1495/LT1496
The
q
denotes the specifications which apply over the temperature range of 0°C
≤
T
A
≤
70°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
= half
supply, unless otherwise noted. (Note 3)
SYMBOL PARAMETER
Input Offset Voltage
V
OS
CONDITIONS
V
S
= 5V
V
S
= 3V
V
S
= 5V, MS8 Package
V
S
= 3V, MS8 Package
(Note 4)
(Note 5)
V
CM
= 10V (Note 6)
(Note 5)
V
S
= 5V, V
O
= 0.25V to 4.5V, R
L
= 100k
V
S
= 3V, V
O
= 0.25V to 2.5V, R
L
= 100k
V
CM
= 0.2V to 4V, V
S
= 5V
V
CM
= 0.2V to 10V, V
S
= 5V
V
S
= 2.4V to 12V, V
CM
= V
O
= 0.5V
No Load
I
SINK
= 100µA
No Load
I
SOURCE
= 100µA
(Note 5)
(Note 6)
MIN
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
V
OS
TC
I
B
I
OS
A
VOL
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
Large-Signal Voltage Gain
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Minimum Operating Supply Voltage
Output Voltage Swing LOW
Output Voltage Swing HIGH
Short-Circuit Current
Supply Current per Amplifier
CMRR
PSRR
V
OL
V
OH
I
SC
I
S
75
40
0.2
89
64
89
TYP
175
225
175
225
0.4
250
240
20
280
150
106
85
99
2.3
55
225
V
+
– 0.04
V
+
– 0.18
1.1
1.2
MAX
425
525
525
625
2
1200
500
120
36
2.4
110
450
V
+
– 0.08
V
+
– 0.36
0.6
1.8
UNITS
µV
µV
µV
µV
µV/°C
pA
nA
pA
V/mV
V/mV
V
dB
dB
dB
V
mV
mV
V
V
mA
µA
The
q
denotes the specifications which apply over the temperature range of – 40°C
≤
T
A
≤
85°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
=
half supply, unless otherwise noted. (Note 3)
SYMBOL PARAMETER
Input Offset Voltage
V
OS
CONDITIONS
V
S
= 5V
V
S
= 3V
V
S
= 5V, MS8 Package
V
S
= 3V, MS8 Package
(Note 4)
(Note 5)
V
CM
= 10V (Note 6)
(Note 5)
V
S
= 5V, V
O
= 0.25V to 4.5V, R
L
= 100k
V
S
= 3V, V
O
= 0.25V to 2.5V, R
L
= 100k
V
CM
= 0.2V to 4V, V
S
= 5V
V
CM
= 0.2V to 10V, V
S
= 5V
V
S
= 2.7V to 12V, V
CM
= V
O
= 0.5V
No Load
I
SINK
= 100µA
No Load
I
SOURCE
= 100µA
(Note 5)
(Note 6)
MIN
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
V
OS
TC
I
B
I
OS
A
VOL
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
Large-Signal Voltage Gain
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Minimum Operating Supply Voltage
Output Voltage Swing LOW
Output Voltage Swing HIGH
Short-Circuit Current
Supply Current per Amplifier
CMRR
PSRR
V
OL
V
OH
I
SC
I
S
55
30
0.2
88
88
TYP
200
250
200
250
0.4
250
275
20
215
115
106
75
99
2.6
60
245
V
+
– 0.05
V
+
– 0.19
0.9
1.5
MAX
475
575
575
675
2
1700
170
36
2.7
120
490
V
+
– 0.10
V
+
– 0.38
0.4
2.3
UNITS
µV
µV
µV
µV
µV/°C
pA
nA
pA
V/mV
V/mV
V
dB
dB
dB
V
mV
mV
mV
mV
mA
µA
4
LT1494/LT1495/LT1496
The
q
denotes the specifications which apply over the temperature range of – 40°C
≤
T
A
≤
125°C. V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
=
half supply, unless otherwise noted. (Note 3)
SYMBOL PARAMETER
Input Offset Voltage
V
OS
V
OS
TC
I
B
I
OS
A
VOL
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
Large-Signal Voltage Gain
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Minimum Operating Supply Voltage
Output Voltage Swing LOW
Output Voltage Swing HIGH
Supply Current per Amplifier
CONDITIONS
V
S
= 5V
V
S
= 3V
(Note 4)
(Note 5)
V
CM
= 10V (Note 6)
(Note 5)
V
S
= 5V, V
O
= 0.25V to 4.5V, R
L
= 100k
V
S
= 3V, V
O
= 0.25V to 2.5V, R
L
= 100k
V
CM
= 0.5V to 4V, V
S
= 5V
V
CM
= 0.5V to 10V, V
S
= 5V
V
S
= 2.7V to 12V, V
CM
= V
O
= 0.5V
No Load
I
SINK
= 100µA
No Load
I
SOURCE
= 100µA
(Note 6)
LT1494H/LT1495H/LT1496H
MIN
TYP
MAX
225
875
275
975
0.4
3
3.8
10
0.300
2
0.3
2
4
25
2
17
0.5
36
72
95
85
86
105
2.7
70
160
275
550
+
– 140
+
– 45
V
V
+
– 450
V
V
+
– 225
2
5
UNITS
µV
µV
µV/°C
nA
µA
nA
V/mV
V/mV
V
dB
dB
dB
V
mV
mV
mV
mV
µA
ELECTRICAL CHARACTERISTICS
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
CMRR
PSRR
V
OL
V
OH
I
S
T
A
= 25°C, V
S
=
±15V,
V
CM
= V
O
= 0V, unless otherwise noted.
SYMBOL PARAMETER
V
OS
Input Offset Voltage
I
B
I
OS
A
VOL
CMRR
PSRR
V
OL
V
OH
I
SC
I
S
Input Bias Current
Input Offset Current
Large-Signal Voltage Gain
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing LOW
Output Voltage Swing HIGH
Short-Circuit Current
Supply Current per Amplifier
CONDITIONS
MS8 Package
MIN
TYP
200
200
25
20
360
120
120
–14.85
–14.75
14.89
14.81
1.5
1.4
MAX
575
675
1000
100
21
UNITS
µV
µV
pA
pA
V/mV
V
dB
dB
V
V
V
V
mA
µA
V
O
=
±10V,
R
L
= 100k
V
CM
= – 15V to 14V
V
S
=
±5V
to
±15V
R
L
= 1M
R
L
= 100k
R
L
= 1M
R
L
= 100k
100
– 15
100
96
–14.70
–14.50
14.78
14.62
0.7
2.0
5
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