LT1097
Low Cost, Low Power
Precision Op Amp
FEATURES
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DESCRIPTION
LT
®
1097 achieves a new standard in combining low price
and outstanding precision performance.
On all operational amplifier data sheets, the specifications
listed on the front page are for highly selected, expensive
grades, while the specs for the low cost grades are buried
deep in the data sheet.
The LT1097 does not have any selected grades, the
outstanding specifications shown in the Features section
are for its only grade.
The design effort of the LT1097 concentrated on optimiz-
ing the performance of all precision specs—at only 350µA
of supply current. Typical values are 10µV offset voltage,
40pA bias and offset currents, 0.2µV/°C and 0.4pA/°C
drift. Common mode and power supply rejections, voltage
gain are typically in excess of 128dB.
All parameters that are important for precision, low power
op amps have been optimized. Consequently, using the
LT1097 error budget calculations in most applications is
unnecessary.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Offset Voltage
50µV Max
Offset Voltage Drift
1µV/°C Max
Bias Current
250pA Max
Offset Current
250pA Max
Bias and Offset Current Drift
4pA/°C Max
Supply Current
560µA Max
0.1Hz to 10Hz Noise
0.5µVp-p, 2.2pAp-p
CMRR
115dB Min
Voltage Gain
117dB Min
PSRR
114dB Min
Guaranteed Operation on Two NiCad Batteries
APPLICATIONS
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Replaces OP-07/OP-77/OP-97/OP-177/AD707/
LT1001 with Improved Price/Performance
High Impedance Difference Amplifiers
Logarithmic Amplifiers (Wide Dynamic Range)
Thermocouple Amplifiers
Precision Instrumentation
Active Filters (with Small Capacitors)
TYPICAL APPLICATION
Saturated Standard Cell Amplifier
9V
2N3609
3
7
LT1097
2
OUT = 1.1V TO 8.0V
AS 1.8k
≤
R2
≤
135k
PERCENT OF UNITS
Input Offset Voltage Distribution
50
6,500 UNITS IN SO PACKAGE
6,680 UNITS IN
PLASTIC
V
S
=
±15V
DIP
T
A
= 25°C
13,180 UNITS
TESTED
+
–
40
6
+
1.018235V
SATURATED
STANDARD
CELL #101
EPPLEY LABS
NEWPORT, R. I.
30
4
20
R1
20k
R2
THE TYPICAL 40pA BIAS CURRENT OF THE LT1097
WILL DEGRADE THE STANDARD CELL BY ONLY
1ppm/YEAR. NOISE IS A FRACTION OF A ppm.
UNPROTECTED GATE MOSFET ISOLATES
STANDARD CELL ON POWER DOWN.
LT1097•TA01
10
0
–50 –40 –30 –20 –10 0 10 20 30 40 50
INPUT OFFSET VOLTAGE (µV)
LT1097 • G01
U
U
U
1
LT1097
ABSOLUTE
MAXIMUM
RATINGS
Supply Voltage ......................................................
±20V
Differential Input Current (Note 1) ......................
±10mA
Input Voltage .........................................................
±20V
Output Short Circuit Duration .......................... Indefinite
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
V
OS
TRIM 1
–IN 2
+IN 3
V
–
4
8
7
6
5
V
OS
TRIM
V
+
OUT
OVER COMP
ORDER
PART NUMBER
LT1097CN8
N8 PACKAGE
8-LEAD PLASTIC DIP
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
∆V
OS
∆TIME
I
OS
I
B
e
n
PARAMETER
Input Offset Voltage
Long Term Input Offset
Voltage Stability
Input Offset Current
Input Bias Current
Input Noise Voltage
Input Noise Voltage Density
i
n
Input Noise Current
Input Noise Current Density
Input Resistance
Differential Mode
Common Mode
Input Voltage Range
CMRR
PSRR
A
VOL
V
OUT
SR
GBW
I
S
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
Output Voltage Swing
Slew Rate
Gain Bandwidth Product
Supply Current
Offset Adjustment Range
Minimum Supply Voltage
V
CM
=
±13.5V
0.1Hz to 10Hz
f
O
= 10Hz
f
O
= 1000Hz
0.1Hz to 10Hz
f
O
= 10Hz
f
O
= 1000Hz
(Note 2)
CONDITIONS
V
S
=
±15V,
V
CM
= 0V, T
A
= 25°C, unless otherwise noted.
MIN
LT1097CN8
TYP
MAX
10
0.3
40
±40
0.5
16
14
2.2
0.03
0.008
30
±13.5
115
114
700
250
±13
±11.5
0.1
80
10
12
±14.3
130
130
2500
1000
±13.8
±13
0.2
700
350
560
±1.2
25
±13.5
115
114
700
250
±13
±11.5
0.1
250
±250
50
MIN
LT1097S8
TYP
10
0.3
60
±50
0.5
16
14
2.4
0.035
0.008
70
8•10
11
±14.3
130
130
2500
1000
±13.8
±13
0.2
700
350
±600
—
560
350
±350
MAX
60
UNITS
µV
µV/Mo
pA
pA
µVp-p
nV/√Hz
nV/√Hz
pAp-p
pA/√Hz
pA/√Hz
MΩ
Ω
V
dB
dB
V/mV
V/mV
V
V
V/µs
kHz
µA
µV
V
V
S
=
±1.2V
to
±20V
V
O
=
±12V,
R
L
= 10k
V
O
=
±10V,
R
L
= 2k
R
L
= 10k
R
L
= 2k
R
POT
= 10k, Wiper to V
+
(Note 3)
±1.2
2
U
U
W
W W
U
W
TOP VIEW
V
OS
TRIM 1
–IN 2
+IN 3
V
–
4
8
7
6
5
V
OS
TRIM
V
+
OUT
OVER COMP
ORDER
PART NUMBER
LT1097S8
S8 PACKAGE
8-LEAD PLASTIC SO
±600
—
LT1097
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
Average Temperature Coefficient of (Note 4)
Input Offset Voltage
I
OS
Input Offset Current
Average Temperature Coefficient of (Note 4)
Input Offset Current
I
B
Input Bias Current
Average Temperature Coefficient of (Note 4)
Input Bias Current
A
VOL
CMRR
PSRR
V
OUT
I
S
Large Signal Voltage Gain
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Input Voltage Range
Output Voltage Swing
Supply Current
R
L
= 10k
CONDITIONS
V
S
=
±15V,
V
CM
= 0V, 0°C
≤
T
A
≤
70°C, unless otherwise noted.
MIN
q
q
q
q
q
q
q
q
q
q
q
q
q
LT1097CN8
TYP
MAX
20
0.2
60
0.4
±60
0.4
100
1
430
4
±430
4
MIN
LT1097S8
TYP
20
0.2
75
0.5
±75
0.5
MAX
130
1.4
570
5
±570
5
UNITS
µV
µV/°C
pA
pA/°C
pA
pA/°C
V/mV
V/mV
dB
dB
V
V
V
OUT
=
±12V,
R
L
≥
10k
V
OUT
=
±10V,
R
L
≥
2k
V
CM
=
±13.5V
V
S
=
±1.3V
to
±20V
450
180
112
111
±13.5
±13
2000
800
128
128
±14.2
±13.7
380
700
450
180
112
111
±13.5
±13
2000
800
128
128
±14.2
±13.7
380
700
µA
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
Average Temperature Coefficient of
Input Offset Voltage
I
OS
Input Offset Current
Average Temperature Coefficient of
Input Offset Current
I
B
Input Bias Current
Average Temperature Coefficient of
Input Bias Current
A
VOL
CMRR
PSRR
V
OUT
I
S
Large Signal Voltage Gain
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Input Voltage Range
Output Voltage Swing
Supply Current
R
L
= 10k
CONDITIONS
V
S
=
±15V,
V
CM
= 0V, –40°C
≤
T
A
≤
85°C, unless otherwise noted. (Note 5)
MIN
q
q
q
q
q
q
LT1097CN8
TYP
MAX
25
0.3
70
0.5
±70
0.5
130
1.2
600
5
±600
5
MIN
LT1097S8
TYP
30
0.3
85
0.6
±85
0.6
MAX
170
1.6
750
6
±750
6
UNITS
µV
µV/°C
pA
pA/°C
pA
pA/°C
V/mV
V/mV
dB
dB
V
V
V
OUT
=
±12V,
R
L
≥
10k
V
OUT
=
±10V,
R
L
≥
2k
V
CM
=
±13.5V
V
S
=
±1.5V
to
±20V
q
q
q
q
q
q
q
300
108
108
±13.5
±13
1700
700
127
127
±14
±13.6
400
800
300
108
108
±13.5
±13
1700
700
127
127
±14
±13.6
400
800
µA
The
q
denotes specifications which apply over the full 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:
This parameter is guaranteed by design and is not tested.
Note 3:
Power supply rejection ratio is measured at the minimum supply
voltage.
Note 4:
This parameter is not 100% tested.
Note 5:
The LT1097 is designed, characterized and expected to meet these
extended temperature limits, but is not tested at –40°C and 85°C.
Guaranteed I grade parts are available; consult factory.
3
LT1097
TYPICAL PERFORMANCE CHARACTERISTICS
Distribution to Offset Voltage Drift
with Temperature
50
PERCENT OF UNITS
Input Bias Current vs Temperature
200
COMMON MODE RANGE OR OUTPUT SWING (V)
INPUT BIAS CURRENT (pA)
100
UNDERCANCELLED UNIT
0
–100
OVERCANCELLED UNIT
–200
–300
–50
–25
0
25
50
TEMPERATURE (°C)
Warm-Up Drift
5
120
V
S
=
±15V
T
A
= 25°C
INPUT BIAS CURRENT (pA)
CHANGE IN OFFSET VOLTAGE (µV)
4
3
2
PLASTIC-IN-LINE PACKAGE
PLASTIC (N) OR SO (S)
1
0
0
1
2
3
4
TIME AFTER POWER ON (MINUTES)
5
4
U W
40
30
V
S
=
±15V
240 UNITS TESTED
IN N8 PACKAGES
FROM SIX RUNS
20
10
0
–1.5 –1.2 –0.9 –0.6 –0.3 0 0.3 0.6 0.9 1.2 1.5
OFFSET VOLTAGE DRIFT WITH TEMPERATURE (µV/°C)
LT1097 • G02
Minimum Supply Voltage,
Common Mode Range and
Voltage Swing at V
MIN
V
+
V
+
–0.2
V
+
–0.4
V
+
–0.6
V
+
–0.8
V
–
+0.8
V
–
V
–
V
–
+0.6
+0.4
+0.2
V
–
–40
–10
20
50
TEMPERATURE (°C)
80
110
1097 • G04
±1.4
±1.2
±1.0
CM RANGE
SWING
R
L
= 10k
SWING
CM RANGE
±0.8
MINIMUM SUPPLY VOLTAGE, V
MIN
(V)
75
100
1097 • G03
Input Bias Current Over Common
Mode Range
V
S
=
±15V
T
A
= 25°C
DEVICE WITH POSITIVE INPUT CURRENT
80
40
R
IN CM
= 10
12
Ω
0
–40
–
DEVICE WITH NEGATIVE INPUT CURRENT
–80
–120
–15
V
CM
I
B
+
–10
–5
0
5
10
COMMON MODE INPUT VOLTAGE
15
1097 • G05
1097 • G06
LT1097
TYPICAL PERFORMANCE CHARACTERISTICS
Output Short Circuit Current vs Time
20
15
10
5
0
–5
V
S
=
±15V
T
A
= 25°C
SHORT CIRCUIT CURRENT (mA)
SINKING
SOURCING
0.1Hz to 10Hz Noise
V
S
=
±1.2V
TO
±20V
T
A
= 25°C
NOISE VOLTAGE (0.4µV/DIV)
NOISE VOLTAGE (0.4µV/DIV)
0
2
4
6
TIME (SECONDS)
8
10
1097 • G08
0.4µV
Noise Spectrum
1000
–30
T
A
= 25°C
V
S
=
±1.2V
TO
±20V
VOLTAGE NOISE DENSITY (nV√Hz)
CURRENT NOISE DENSITY (fA√Hz)
CHANGE IN OFFSET VOLTAGE (µV)
100
CURRENT NOISE
10
1/f CORNER
2.5Hz
1
1
10
100
FREQUENCY (Hz)
1000
1097 • G10
U W
–10
–15
–20
0
1
2
TIME FROM OUTPUT SHORT (MINUTES)
3
1097 • G07
0.01Hz to 10Hz Noise
V
S
=
±1.2V
TO
±20V
T
A
= 25°C
0
20
40
60
TIME (SECONDS)
80
100
1097 • G09
Voltage Gain
V
s
=
±15
V
T
A
= 25°C
–20
–10
R
L
= 10k
0
10
20
30
–15
R
L
= 2k
R
L
= 10k
R
L
= 2k
VOLTAGE NOISE
1/f CORNER
140Hz
–10
–5
0
5
OUTPUT VOLTAGE (V)
10
15
1097 • G11
5
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