LT1495/LT1496
1.5µA Max, Dual and Quad
Precision Rail-to-Rail
Input and Output Op Amps
FEATURES
s
s
s
s
s
s
s
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DESCRIPTION
The LT
®
1495/LT1496 are the lowest power (I
S
≤
1.5µA) op
amps with precision specifications. The extremely low
supply current is combined with excellent amplifier speci-
fications: 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 character-
istics 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
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 LT1495 is available in plastic 8-pin PDIP and SO-8
packages with the standard dual op amp pinout. The
LT1496 is available in 14-pin SO and PDIP packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Low Supply Current: 1.5
µ
A Max
Rail-to-Rail Input and Output
Low Offset Voltage: 375
µ
V Max
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
APPLICATIONS
s
s
s
s
Battery- or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplifier
Micropower Filter
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
UNITS
100 AMPLIFIERS
V
S
=
±2.5V
–40°C TO 85°C
–
1/2 LT1495
–
1/2 LT1495
V
O
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
U
U
TC V
OS
Distribution
1
LT1495/LT1496
ABSOLUTE
MAXIMUM
RATINGS
Total Supply Voltage (V
+
to V
–
) .............................. 36V
Input Differential Voltage ......................................... 36V
Input Current ......................................................
±10mA
Output Short-Circuit Duration .......................Continuous
Operating Temperature Range ................ – 40°C to 85°C
Specified Temperature Range (Note 1) ... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Junction Temperature ........................................... 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
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
ORDER PART
NUMBER
OUT A
1
2
3
4
5
6
7
LT1495CN8
LT1495CS8
S8 PACKAGE
8-LEAD PLASTIC SO
S8 PART MARKING
1495
T
JMAX
= 150°C,
θ
JA
= 130°C/ W (N8)
T
JMAX
= 150°C,
θ
JA
= 190°C/ W (S8)
Consult factory for Industrial and Military grade parts.
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
V
OS
Input Offset Voltage
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
CONDITIONS
V
S
= 5V
V
S
= 3V
(Note 3)
V
CM
= 10V (Note 4)
(Note 3)
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
MIN
TYP
150
200
250
180
20
4
185
10
500
250
106
95
99
2.1
50
210
MAX
375
475
1000
360
100
UNITS
µV
µV
pA
nA
pA
µV
P-P
nV/√Hz
fA/√Hz
V/mV
V/mV
V
dB
dB
dB
V
mV
mV
CMRR
PSRR
V
OL
2
U
U
W
W W
U
W
TOP VIEW
14 OUT D
A
D
13 –IN D
12 +IN D
11 V
–
10 +IN C
B
C
9
8
–IN C
OUT C
ORDER PART
NUMBER
LT1496CN
LT1496CS
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
N PACKAGE
14-LEAD PDIP
S PACKAGE
14-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 110°C/ W (N8)
T
JMAX
= 150°C,
θ
JA
= 150°C/ W (S8)
100
50
0
90
74
90
36
2.2
100
410
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
V
OH
I
SC
I
S
SR
GBW
PARAMETER
Output Voltage Swing HIGH
Short-Circuit Current
Supply Current per Amplifier
Reverse Supply Voltage
Slew Rate
Gain Bandwidth Product
CONDITIONS
No Load
I
SOURCE
= 100µA
(Note 3)
(Note 4)
I
S
= 10µA per Amplifier
A
V
= –1, V
S
=
±5V
f = 100Hz
MIN
V
+
– 0.07
V
+
– 0.32
0.7
–18
0.4
TYP
V
+
– 0.035
V
+
– 0.160
1.3
1.0
1.0
2.7
MAX
UNITS
V
V
mA
µA
V
V/ms
kHz
1.5
0°C
≤
T
A
≤
70°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
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
CONDITIONS
V
S
= 5V
V
S
= 3V
(Note 2)
(Note 3)
V
CM
= 10V (Note 4)
(Note 3)
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 3)
(Note 4)
MIN
q
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
SC
I
S
75
40
0
89
64
89
TYP
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
2
1200
500
120
36
2.4
110
450
V
+
– 0.08
V
+
– 0.36
0.6
1.8
UNITS
µV
µV
µV/°C
pA
nA
pA
V/mV
V/mV
V
dB
dB
dB
V
mV
mV
V
V
mA
µA
– 40°C
≤
T
A
≤
85°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
= half supply, unless otherwise noted. (Note 1)
SYMBOL PARAMETER
V
OS
Input Offset Voltage
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
CONDITIONS
V
S
= 5V
V
S
= 3V
(Note 2)
(Note 3)
V
CM
= 10V (Note 4)
(Note 3)
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
MIN
q
q
q
q
q
q
q
q
q
q
q
q
q
CMRR
PSRR
55
30
0
88
88
TYP
200
250
0.4
250
275
20
215
115
106
75
99
2.6
MAX
475
575
2
1700
170
36
2.7
UNITS
µV
µV
µV/°C
pA
nA
pA
V/mV
V/mV
V
dB
dB
dB
V
3
LT1495/LT1496
– 40°C
≤
T
A
≤
85°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
= half supply, unless otherwise noted. (Note 1)
SYMBOL PARAMETER
Output Voltage Swing LOW
V
OL
V
OH
I
SC
I
S
Output Voltage Swing HIGH
Short-Circuit Current
Supply Current per Amplifier
CONDITIONS
No Load
I
SINK
= 100µA
No Load
I
SOURCE
= 100µA
(Note 3)
(Note 4)
MIN
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
V
+
– 0.10
V
+
– 0.38
0.4
TYP
60
245
+
– 0.05
V
V
+
– 0.19
0.9
1.5
MAX
120
490
2.3
UNITS
mV
mV
mV
mV
mA
µA
T
A
= 25°C, V
S
=
±15V,
V
CM
= V
O
= 0V, unless otherwise noted.
SYMBOL
V
OS
I
B
I
OS
A
VOL
CMRR
PSRR
V
OL
V
OH
I
SC
I
S
PARAMETER
Input Offset Voltage
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
MIN
TYP
200
25
20
360
120
120
–14.85
–14.75
14.89
14.81
1.5
1.4
MAX
575
1000
100
21
UNITS
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
0°C
≤
T
A
≤
70°C, V
S
=
±15V,
V
CM
= V
O
= 0V, unless otherwise noted.
SYMBOL
V
OS
I
B
I
OS
A
VOL
CMRR
PSRR
V
OL
V
OH
I
SC
I
S
PARAMETER
Input Offset Voltage
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
q
q
q
MIN
V
O
=
±10V,
R
L
= 100k
V
CM
= –14.8V to 14V
V
S
=
±5V
to
±15V
R
L
= 1M
R
L
= 100k
R
L
= 1M
R
L
= 100k
q
q
q
q
q
q
q
q
q
q
60
– 15
98
94
TYP
225
250
20
240
120
120
–14.84
–14.73
14.88
14.79
1.3
1.6
MAX
625
1200
120
21
–14.67
–14.46
14.76
14.58
0.6
2.4
UNITS
µV
pA
pA
V/mV
V
dB
dB
V
V
V
mV
mA
µA
4
LT1495/LT1496
ELECTRICAL CHARACTERISTICS
–40°C
≤
T
A
≤
85°C, V
S
=
±15V,
V
CM
= V
O
= 0V, unless otherwise noted. (Note 1)
SYMBOL
V
OS
I
B
I
OS
A
VOL
CMRR
PSRR
V
OL
V
OH
I
SC
I
S
PARAMETER
Input Offset Voltage
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
q
q
q
MIN
V
O
=
±10V,
R
L
= 100k
V
CM
= –14.8V to 14V
V
S
=
±5V
to
±15V
R
L
= 1M
R
L
= 100k
R
L
= 1M
R
L
= 100k
q
q
q
q
q
q
q
q
q
q
50
– 15
96
92
TYP
250
250
20
200
114
120
–14.83
–14.72
14.87
14.77
1.1
2.0
MAX
675
1700
170
21
–14.66
–14.44
14.74
14.54
0.4
3.0
UNITS
µV
pA
pA
V/mV
V
dB
dB
V
V
V
V
mA
µA
The
q
denotes specifications which apply over the full operating
temperature range.
Note 1:
The LT1495/LT1496 are designed, characterized and expected to
meet these extended temperature limits, but are not tested at – 40°C and
85°C. Guaranteed I grade parts are available; consult factory.
Note 2:
This parameter is not 100% tested.
Note 3:
V
S
= 5V limit guaranteed by correlation to V
S
= 3V and V
S
=
±15V
tests.
Note 4:
V
S
= 3V limit guaranteed by correlation to V
S
= 5V and V
S
=
±15V
tests.
TYPICAL PERFORMANCE CHARACTERISTICS
Distribution of Input Offset Voltage
20
18
16
PERCENT OF UNITS (%)
SUPPLY CURRENT PER AMPLIFIER (µA)
2.0
CHANGE IN OFFSET VOLTAGE (µV)
V
S
= 5V, 0V
LT1495/LT1496
4500 OP AMPS
14
12
10
8
6
4
2
0
–400 –300 –200 –100 0 100 200 300 400
INPUT OFFSET VOLTAGE (µV)
1495 G01
U W
Supply Current vs Temperature
2.5
Minimum Supply Voltage
200
150
100
T
A
= 85°C
50
T
A
= 25°C
T
A
= – 40°C
1.5
V
S
=
±15V
1.0
V
S
=
±2.5V
0.5
0
0
– 40 – 20
– 50
40
0
60
20
TEMPERATURE (°C)
80
100
1
3
2
4
TOTAL SUPPLY VOLTAGE (V)
5
1495 G03
1495 G02
5
嵌入式系统
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