LT1077
Micropower, Single Supply,
Precision Op Amp
FEATURES
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DESCRIPTIO
■
60µA Max Supply Current
40µV Max Offset Voltage
350pA Max Offset Current
0.5µV
P-P
0.1Hz to 10Hz Voltage Noise
2.5pA
P-P
0.1Hz to 10Hz Current Noise
O.4µV/°C Offset Voltage Drift
250kHz Gain-Bandwidth Product
0.12V/µs Slew Rate
Single Supply Operation
Input Voltage Range Includes Ground
Output Swings to Ground while Sinking Current
No Pull-Down Resistors are Needed
Output Sources and Sinks 5mA Load Current
The LT
®
1077 is a micropower precision operational
amplifier optimized for single supply operation at 5V. In
addition,
±15V
specifications are provided.
Micropower performance of competing devices is
achieved at the expense of seriously degrading precision,
noise, speed, and output drive specifications. The LT1077
reduces supply current without sacrificing other
parameters. The offset voltage achieved is the lowest
of any micropower op amp. Offset current, voltage
and current noise, slew rate and gain-bandwidth product
are all two to ten times better than on previous micropower
op amps.
The 1/f corner of the voltage noise spectrum is at 0.7Hz.
This results in low frequency (0.1Hz to 10Hz) noise
performance which can only be found on devices with an
order of magnitude higher supply current.
The LT1077 is completely plug-in compatible (including
nulling) with all industry standard precision op amps.
Thus, it can replace these precision op amps in many
applications without sacrificing performance, yet with
significant power savings.
The LT1077 can be operated from one lithium cell or two
Ni-Cad batteries. The input range goes below ground. The
all-NPN output stage swings to ground while sinking
current—no pull-down resistors are needed.
For dual and quad op amps with similar specifications
please see the LT1078/LT1079 datasheet.
APPLICATIO S
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Replaces OP-07, OP-77, AD707, LT1001, LT1O12
at 10 to 60 Times Lower Power
Battery or Solar Powered Systems
4mA to 2OmA Current Loops
Two Terminal Current Source
Megaohm Source Resistance Difference Amplifier
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
3.6V TO 9V
2
Distribution of Input Offset Voltage
35
30
PERCENT OF UNITS
Self Buffered Micropower Reference
7
LT1077
3
6
OUTPUT
1.230V
±1.2%
MAX
SUPPLY CURRENT = 60µA MAX
SOURCES UP TO 10mA
LOAD REGULATION = 30µV/mA
TEMPERATURE DRIFT = 12ppm/°C
LT1077 • TA01
25
20
15
10
5
–
+
4
LT1034
1.2V
0.1µF
750k
0
0
–40 –30 –20 –10
10 20 30 40
INPUT OFFSET VOLTAGE (µV)
LT1077 • TA02
1077fa
U
V
S
= 5V, 0V
T
A
= 25°C
1072 UNITS
TESTED IN
H, J8, N8
PACKAGES
U
U
1
LT1077
ABSOLUTE
AXI U
RATI GS
(Note 1)
Operating Temperature Range
LT1077AM/LT1077M
(OBSOLETE)....
– 55°C to 125°C
LT1077AI/LT1077I.............................. – 40°C to 85°C
LT1077AC/LT1077C/LT1077S8 ............... 0°C to 70°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Supply Voltage ......................................................
±22V
Differential Input Voltage .......................................
±30V
Input Voltage ............... Equal to Positive Supply Voltage
Input Voltage ............5V Below Negative Supply Voltage
Output Short-Circuit Duration .......................... Indefinite
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V
OS
TRIM
8
V
OS
TRIM 1
A
–IN 2
+IN 3
–
+ +
B
–
6 OUT
5 NC
7
V
+
V
OS
TRIM 1
–IN 2
+IN 3
V
–
TOP VIEW
8
7
6
5
V
OS
TRIM
V
+
4
V
–
H PACKAGE
8-LEAD TO-5 METAL CAN
T
JMAX
= 150°C,
θ
JA
= 150°C/W,
θ
JC
= 45°C/W
4
J8 PACKAGE
8-LEAD CERDIP
T
JMAX
= 150°C,
θ
JA
= 100°C/W
ORDER PART NUMBER
LT1077AMH
LT1077MH
LT1077ACH
LT1077CH
ORDER PART NUMBER
LT1077AMJ8
LT1077MJ8
LT1077ACJ8
LT1077CJ8
OBSOLETE PACKAGE
Consider the N8 or S8 Package for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
∆V
OS
∆Time
I
OS
I
B
e
n
PARAMETER
Input Offset Voltage
LT1077S8
Long Term Input Offset
Voltage Stability
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Voltage Density
i
n
Input Noise Current
CONDITIONS
V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, T
A
= 25°C unless noted.
LT1077AM/AI/AC
MIN
TYP
MAX
9
0.4
0.06
7
0.35
9
1.1
43
35
4.5
40
MIN
LT1077M/I/C/S8
TYP
MAX
10
12
0.4
0.06
7
0.5
28
27
2.5
0.45
11
60
150
UNITS
µV
µV
µV/Mo
nA
nA
µV
P-P
nV/√Hz
nV/√Hz
pA
P-P
1077fa
0.1Hz to 10Hz (Note3)
f
O
= 10Hz (Note 3)
f
O
= 1000Hz (Note3)
0.1Hz to 10Hz (Note3)
2
U
U
W
W W
U
W
TOP VIEW
V
OS
TRIM 1
–IN 2
+IN 3
V
–
4
N8 PACKAGE
8-LEAD PDIP
T
JMAX
= 100°C,
θ
JA
= 130°C/W
8
7
6
5
V
OS
TRIM
V
+
OUT
NC
OUT
NC
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 190°C/W
ORDER PART NUMBER
LT1077S8
LT1077IS8
LT1077AIN8
LT1077IN8
LT1077ACN8
LT1077CN8
S8 PART MARKING
1077
1077I
LT1077 • POI01
0.5
28
27
2.5
LT1077
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
Input Noise Current Density
Input Resistance
Differential Mode
Common Mode
Input Voltage Range
CMRR
PSRR
A
VOL
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage
Swing
V
CM
= 0V to 3.5V
V
S
= 2.3V to 12V
CONDITIONS
V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, T
A
= 25°C unless noted.
LT1077AM/AI/AC
MIN
TYP
MAX
0.065
0.02
350
3.5
0
97
102
300
250
700
6
3.8
– 0.3
106
118
1000
1000
3.5
0.7
90
4.4
3.9
0.08
230
48
60
±500
2.3
6
1.1
130
4.2
3.5
0.05
0.11
LT1077M/I/C/S8
MIN
TYP
MAX
0.065
0.02
270
3.5
0
94
100
240
200
700
6
3.8
– 0.3
105
117
1000
1000
3.5
0.7
90
4.4
3.9
0.08
230
48
±900
2.2
2.3
68
6
1.1
130
UNITS
pA/√Hz
pA/√Hz
MΩ
GΩ
V
V
dB
dB
V/mV
V/mV
mV
mV
mV
V
V
V/µs
kHz
µA
µV
V
f
O
= 10Hz (Note 3)
f
O
= 1000Hz
(Note 4)
V
O
= 0.03V to 4V, No Load
V
O
= 0.03V to 3.5V, R
L
= 50k
Output Low, No Load
Output Low, 2k to GND
Output Low, l
SINK
= 100µA
Output High, No Load
Output High, 2k to GND
(Note 2)
f
O
≤
20kHz
R
pot
= 10k, Wiper to V
+
(Note 5)
4.2
3.5
0.05
SR
GBW
I
S
Slew Rate
Gain Bandwidth Product
Supply Current
Offset Adjustment Range
Minimum Supply Voltage
±500
±900
2.2
The
●
denotes the specifications which apply over the temperature range of –55°C
≤
T
A
≤
125°C for AM/M grades,
–40°C
≤
T
A
≤
85°C for AI/I grades. V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V unless otherwise noted.
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
CMRR
PSRR
A
VOL
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage
Swing
V
CM
= 0.05V to 3.2V
V
S
= 3.1V to 12V
V
O
= 0.05V to 3.5V, R
L
= 50k
Output Low, No Load
Output Low, I
SINK
= 100µA
Output High, No Load
Output High, 2k to GND
LT1077IS8 (Note 6)
CONDITIONS
●
●
●
●
●
●
●
●
●
●
●
●
LT1077AM/AI
MIN
TYP MAX
50
200
LT1077M/I
MIN
TYP
MAX
60
1
260
2.5
0.80
13
UNITS
µV
µV/°C
nA
nA
dB
dB
V/mV
0.08
8
92
98
120
104
114
600
4.5
120
4.2
3.7
54
0.60
11
88
94
100
8
170
3.9
3
80
0.08
8
103
113
600
4.5
120
4.2
3.7
54
8
170
3.9
3
mV
mV
V
V
µA
I
S
Supply Current
90
1077fa
3
LT1077
The
●
denotes the specifications which apply over the temperature range
of 0°C
≤
T
A
≤
70°C otherwise, specifications are at T
A
= 25°C. V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V unless noted.
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
CMRR
PSRR
A
VOL
PARAMETER
Input Offset Voltage
LT1077S8
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage Swing
V
CM
= 0V to 3.4V
V
S
= 2.6V to 12V
V
O
= 0.05V to 3.5V, R
L
= 50k
Output Low, No Load
Output Low, I
SINK
= 100µA
Output High, No Load
Output High, 2k to GND
(Note 6)
LT1077S8 (Note 6)
CONDITIONS
●
●
●
ELECTRICAL CHARACTERISTICS
MIN
LT1077AC
TYP MAX
30
0.4
0.07
7
110
1.6
0.45
10
MIN
LT1077C/S8
TYP
MAX
35
40
0.5
0.7
0.07
7
150
280
2.0
3.0
0.60
12
UNITS
µV
µV
µV/°C
µV/°C
nA
nA
dB
dB
V/mV
●
●
●
●
●
●
●
●
●
●
94
100
180
105
116
800
4.0
100
4.3
3.8
52
7
150
90
97
150
104
115
800
4.0
100
4.3
3.8
52
7
150
4.1
3.3
4.1
3.3
70
mV
mV
V
V
µA
I
S
Supply Current
80
V
S
=
±15V,
T
A
= 25°C unless noted.
SYMBOL
V
OS
I
OS
I
B
PARAMETER
Input Offset Voltage
LT1077S8
Input Offset Current
Input Bias Current
Input Voltage Range
CMRR
PSRR
A
VOL
V
OUT
SR
I
S
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage Swing
Slew Rate
Supply Current
V
CM
= 13.5V to –15V
V
S
= 5V, 0V to
±18V
V
O
=
±10V,
R
L
= 50k
V
O
=
±10V,
R
L
= 2k
R
L
= 50k
R
L
= 2k
13.5
– 15.0
100
106
1000
400
±13.0
±11.0
0.07
0.06
7
13.8
– 15.3
109
122
8000
1500
±14.0
±13.2
0.12
56
75
0.35
9
13.5
– 15.0
97
103
800
300
±13.0
±11.0
0.07
CONDITIONS
LT1077AM/AI/AC
MIN
TYP
MAX
20
150
LT1077M/I/C/S8
MIN
TYP
MAX
25
30
0.06
7
13.8
– 15.3
108
120
8000
1500
±14.0
±13.2
0.12
56
85
200
300
0.45
11
UNITS
µV
µV
nA
nA
V
V
dB
dB
V/mV
V/mV
V
V
V/µs
µA
1077fa
4
LT1077
The
●
denotes the specifications which apply over the temperature range of
–55°C
≤
T
A
≤
125°C for AM/M grades, – 40°C
≤
T
A
≤
85°C for AI/I grades. V
S
=
±15V
unless otherwise noted.
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
A
VOL
CMRR
PSRR
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Large-Signal Voltage Gain
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Maximum Output Voltage Swing
I
S
Supply Current
V
O
=
±10V,
R
L
= 5k
V
CM
= 13V, –14.9V
V
S
= 5V, 0V to
±18V
R
L
= 5k
LT1077IS8 (Note 6)
CONDITIONS
●
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
MIN
LT1077AM/AI
TYP MAX
60
330
MIN
LT1077M/I
TYP
MAX
75
1.1
450
3
0.80
13
UNITS
µV
µV/°C
nA
nA
V/mV
dB
dB
V
0.08
8
300
94
100
±11
1000
107
118
±13.5
60
0.60
11
250
90
97
±11
95
0.08
8
1000
106
116
±13.5
60
105
µA
The
●
denotes the specifications which apply over the temperature range of 0°C
≤
T
A
≤
70°C.
V
S
=
±15V
unless otherwise noted.
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
A
VOL
CMRR
PSRR
PARAMETER
Input Offset Voltage
LT1077S8
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Large-Signal Voltage Gain
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Maximum Output Voltage Swing
I
S
Supply Current
V
O
=
±10V,
R
L
= 5k
V
CM
= 13V, –15V
V
S
= 5V, 0V to
±18V
R
L
= 5k
(Note 6)
LT1077S8 (Note 6)
CONDITIONS
●
●
●
●
●
●
●
●
●
●
●
LT1077AC
MIN
TYP MAX
40
0.4
0.07
7
500
97
103
±11
2000
108
120
±13.6
59
85
230
1.8
0.45
10
LT1077C/S8
MIN
TYP
MAX
50
65
0.5
0.8
0.07
7
400
94
100
±11
2000
107
118
±13.6
59
95
320
450
2.5
3.5
0.60
12
UNITS
µV
µV
µV/°C
µV/°C
nA
nA
V/mV
dB
dB
V
µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impared.
Note 2:
Slew rate at 5V, 0V is guaranteed by inference from the slew rate
measurement at
±15V.
Note 3:
This parameter is tested on a sample basis only. All noise
parameters are tested with V
S
=
±
2.5V, V
O
= 0V.
Note 4:
This parameter is guaranteed by design and is not tested.
Note 5:
Power supply rejection ratio is measured at the minimum supply
voltage. The op amps actually work at 1.8V supply but with a typical offset
skew of – 300µV.
Note 6:
This parameter is not 100% tested.
1077fa
5
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