LTC1100
Precision, Zero-Drift
Instrumentation Amplifier
FEATURES
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DESCRIPTIO
Offset Voltage: 10µV Max
Offset Voltage Drift: 100nV/°C Max
Bias Current: 65pA Max
Offset Current: 65pA Max
Gain Nonlinearity: 20ppm Max
Gain Error:
±0.075%
Max
CMRR: 90dB
0.1Hz to 10Hz Noise: 1.9µV
P-P
Single 5V Supply Operation
8-Pin MiniDIP
The LTC
®
1100 is a high precision instrumentation amplifier
using zero-drift techniques to achieve outstanding DC
performance. The input DC offset is typically 1µV while
the DC offset drift is typically 5nV/°C; a very low bias
current of 65pA is also achieved.
The LTC1100 is self-contained; that is, it achieves a differ-
ential gain of 100 without any external gain setting resistor
or trim pot. The gain linearity is 20ppm and the gain drift is
4ppm/°C. The LTC1100 operates from a single 5V supply
up to
±8V.
The output typically swings 300mV from its
power supply rails with a 10k load.
An optional external capacitor can be added from Pin 7 to
Pin 8 to tailor the device’s 18kHz bandwidth and to
eliminate any unwanted noise pickup.
The LTC1100 is also offered in a 16-pin surface mount
package with selectable gains of 10 or 100.
The LTC1100 is manufactured using Linear Technology’s
enhanced LTCMOS
TM
silicon gate process.
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTCMOS is a trademark of Linear Technology Corporation
APPLICATIO S
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Thermocouple Amplifiers
Strain Gauge Amplifiers
Differential to Single-Ended Converters
TYPICAL APPLICATIO
Single 5V Supply, DC Instrumentation Amplifier
1
2
–V
IN
3
4
LTC1100
8
7
6
5
0.01µF
V
IN
V
OUT
V
+
= 5V
0.1µF
V
OUT
= 100 [V
IN
– (–V
IN
)]
LTC1100 • TA01
U
1100fc
U
U
1
LTC1100
ABSOLUTE
AXI U
RATI GS
Operating Temperature Range
LTC1100M/AM
(OBSOLETE)
...........
−55°C
to 125°C
LTC1100C .........................................
−40°C
to 85°C
Output Short Circuit Duration ......................... Indefinite
PACKAGE/ORDER I FOR ATIO
TOP VIEW
GND REF 1
CMRR 2
–V
IN
3
V
–
4
8
7
6
5
V
OUT
COMP
V
IN
V
+
ORDER PART
NUMBER
LTC1100CN8
N8 PACKAGE
8-LEAD PDIP
T
JMAX
= 110°C,
θ
JA
= 130°C/W
J PACKAGE
8-LEAD CERDIP
T
JMAX
= 150°C,
θ
JA
= 100°C/W
LTC1100CJ8
LTC1100AMJ8
LTC1100MJ8
OBSOLETE PACKAGE
Consider the N Package for an Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER
Gain Error
CONDITIONS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±
5V, R
L
= 10k, C
C
= 1000pF, unless otherwise noted.
LTC1100ACN
MIN
TYP
MAX
0.01
●
Gain Nonlinearity
●
Input Offset Voltage
Input Offset Voltage Drift
Input Noise Voltage
Input Bias Current
(Note 2)
(Note 2)
DC to 10Hz, T
A
= 25°C
●
●
Input Offset Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing
Supply Current
V
CM
= 2.3V to
−4.7V
(Note 3)
V
S
=
±2.375V
to
±8V
R
L
= 2k, V
S
=
±8V
R
L
=10k, V
S
=
±8V
Internal Sampling Frequency
Bandwidth
2
U
U
W
W W
U
W
(Note 1)
Storage Temperature Range ................
−65°C
to 150°C
Total Supply Voltage (V
+
to V
−
) ............................. 18V
Input Voltage ....................... (V
+
+
0.3V) to (V
−
−
0.3V)
Lead Temperature (Soldering, 10 sec)................. 300°C
TOP VIEW
NC 1
GND REF 2
G = 10 3
CMRR 4
NC 5
–V
IN
6
V
–
7
16 NC
15 V
OUT
14 G = 10
13 COMP
12 NC
11 V
IN
10 V
+
9
NC
ORDER PART
NUMBER
LTC1100CSW
NC 8
SW PACKAGE
16-LEAD PLASTIC SO WIDE
T
JMAX
= 110°C,
θ
JA
= 100°C/W
LTC1100CN/CJ
MIN
TYP
MAX
0.01
3
12
±1
±5
1.9
2.5
10
90
105
110
6.2
7.5
2.4
3.4
2.8
18
3.3
4.5
0.075
0.150
20
60
±10
±100
65
135
65
UNITS
±%
±%
ppm
ppm
µV
nV/°C
µV
P-P
pA
pA
pA
dB
dB
V
V
mA
mA
kHz
kHz
1100fc
0.05
0.10
8
30
±10
±100
50
120
50
3
12
±1
±5
1.9
2.5
●
●
●
●
●
●
10
104
120
– 7.2
– 7.7
2.4
3.4
2.8
18
115
6.2
7.5
2.8
4.0
– 7.2
– 7.7
LTC1100
ELECTRICAL CHARACTERISTICS
PARAMETER
Gain Error
CONDITIONS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±
5V, R
L
= 10k, C
C
= 1000pF, unless otherwise noted.
LTC1100AMJ (Note 4)
MIN
TYP
MAX
0.01
●
MIN
LTC1100MJ
TYP
MAX
0.01
3
±1
±5
1.9
5
0.075
0.150
20
65
±10
±100
65
450
120
UNITS
±%
±%
ppm
ppm
µV
nV/°C
µV
P-P
pA
pA
pA
dB
dB
0.05
0.11
8
40
±10
±100
50
300
80
90
95
7.4
6.0
– 7.4
– 7.0
Gain Nonlinearity
●
3
(Note 2)
(Note 2)
DC to 10Hz, T
A
= 25°C
●
●
Input Offset Voltage
Input Offset Voltage Drift
Input Noise Voltage
Input Bias Current
Input Offset Current
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing
Supply Current
±1
±5
1.9
5
●
V
CM
=
−4.7V
to 2.3V
V
S
=
±2.375V
to
±8V
R
L
= 10k, V
S
=
±8V
R
L
= 2k, V
S
=
±8V
●
●
●
●
●
100
115
– 7.4
– 7.0
2.4
4.2
2.8
18
7.4
6.0
2.4
2.8
18
3.3
4.6
V
V
mA
mA
kHz
kHz
Internal Sampling Frequency
Bandwidth
ELECTRICAL CHARACTERISTICS
PARAMETER
Gain Error
CONDITIONS
T
A
= 25°C, A
V
=100
A
V
=100
A
V
=10
A
V
=10
T
A
= 25°C, A
V
=100
A
V
=100
A
V
=10
A
V
=10
(Note 2)
(Note 2)
DC to 10Hz, T
A
= 25°C
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±
5V, R
L
= 10k, C
C
= 1000pF, unless otherwise specified.
LTC1100ACS
MIN
TYP
MAX
0.01
●
LTC1100CSW
MIN
TYP
MAX
0.01
0.01
3
12
1
±1
±5
1.9
2.5
10
90
85
105
110
0.075
0.150
0.060
0.150
20
60
10
40
±10
±100
65
135
65
UNITS
±%
±%
±%
±%
ppm
ppm
ppm
ppm
µV
nV/°C
µV
P-P
pA
pA
pA
dB
dB
dB
0.01
●
●
●
0.05
0.10
0.04
0.10
8
30
8
25
±10
±100
50
120
50
Gain Nonlinearity
3
12
1
±1
Input Offset Voltage
Input Offset Voltage Drift
Input Noise Voltage
Input Bias Current
●
±5
1.9
2.5
●
Input Offset Current
Common Mode Rejection Ratio
V
CM
=
−4.7V
to 2.3V,
A
V
=100
A
V
=10
V
S
=
±2.375V
to
±8V
●
●
●
●
10
104
95
120
115
Power Supply Rejection Ratio
1100fc
3
LTC1100
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage Swing
Supply Current
CONDITIONS
R
L
=10k, V
S
=
±8V
R
L
= 2k, V
S
=
±8V
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±
5V, R
L
= 10k, C
C
= 1000pF, unless otherwise noted.
MIN
●
●
●
LTC1100ACS
TYP
MAX
6.2
7.5
2.4
3.4
2.8
18
180
2.8
4.0
MIN
– 7.2
– 7.7
LTC1100CSW
TYP
MAX
6.2
7.5
2.4
3.4
2.8
18
180
3.3
4.5
UNITS
V
V
mA
mA
kHz
kHz
kHz
– 7.2
– 7.7
Internal Sampling Frequency
Bandwidth
G = 100
G = 10
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
These parameters are guaranteed by design. Thermocouple effects
preclude measurement of these voltage levels in high speed automatic test
systems. V
OS
is measured to a limit determined by test equipment
capability.
Note 3:
See Applications Information, Single Supply Operation.
Note 4:
Please consult Linear Technology Marketing.
BLOCK DIAGRA S
2
R
7
5 (V
+
)
99R
1
99R
2
90R
9R
4
10 (V
+
)
9R
R
14
90R
–
3
+
6
TYPICAL PERFOR A CE CHARACTERISTICS
Gain Error vs Temperature
0.05
0.04
V
S
=
±8V
R
L
= 50k
DIFFERENTIAL GAIN (dB)
35
PHASE
30
25
20
15
10
GAIN
(G = 10)
GAIN ERROR (±%)
0.03
0.02
0.01
0
GAIN
(G = 100)
150
120
90
60
30
0
GAIN NONLINEARITY (ppm)
–0.01
–50
–25
75
0
25
50
TEMPERATURE (°C)
4
U W
W
−
+
R
R
13
–
8
3
6
–
15
+
4 (V
–
)
R = 2.5k
11
+
7 (V – )
R = 2.5k
LTC1100 • BD02
LTC1100 • BD01
NOTE: FOR A VOLTAGE GAIN OF 10V/V SHORT PIN 2 TO 3, AND PIN 14 TO 15.
Gain, Phase vs Frequency
45
40
210
180
PHASE SHIFT (DEGREES)
25
20
15
10
5
0
Gain Nonlinearity
vs Temperature
V
S
=
±8V
R
L
= 50k
100
125
5
100
1k
10k
FREQUENCY (Hz)
100k
–30
1M
–5
–50
–25
75
0
25
50
TEMPERATURE (°C)
100
125
LTC1100 • TPC01
LTC1100 • TPC02
LTC1100 • TPC03
1100fc
LTC1100
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage
4
POWER SUPPLY REJECTION RATIO (dB)
T
A
= –55°C
3
T
A
= 25°C
COMMON MODE RANGE (V)
SUPPLY CURRENT (mA)
2
T
A
= 125°C
1
0
2
6
10 12 14 16
4
8
TOTAL SUPPLY VOLTAGE V
+
TO V
–
(V)
18
CMRR vs Frequency
120
100
80
CMRR (dB)
60
40
20
0
0.1
G = 100, R
C
= 100k
C
C
= 10pF
±10
±9
V
OUT
±
SWING (V)
G = 100, R
C
=
∞
C
C
= 0pF
±8
NEGATIVE
±7
±6
±5
NEGATIVE
±4
±3
±2
±1
0
NEGATIVE
V
S
=
±8V,
T
A
≤
85°C
POSITIVE
V
S
=
±5V,
T
A
≤
85°C
POSITIVE
V
S
=
±2.5V,
T
A
≤
85°C
POSITIVE
PEAK-TO-PEAK OUTPUT SWING (V)
R
C
C
C
1
3
G = 10, R
C
=
∞
C
C
= 0pF
2
–
LTC1100
6
+
1
10
100
1k
FREQUENCY (Hz)
10k
100k
Bias Current vs
Common Mode Voltage
360
300
240
BIAS CURRENT (pA)
VOLTAGE NOISE DENSITY (nV/
√
Hz)
180
120
60
0
– 60
T
A
= 125°C
SAMPLING FREQUENCY (kHz)
T
A
= 25°C
T
A
= –55°C
–120
–180
–200
–6 –5 –4 –3 –2 –1 0 1 2
COMMON MODE VOLTAGE (V)
U W
LTC1100 • TPC04
LTC1100 • TPC07
Power Supply Rejection Ratio
vs Frequency
150
125
100
75
50
25
0
0.1
1
1k
10
100
FREQUENCY (Hz)
10k
100k
8
6
4
2
0
–2
–4
–6
–8
Common Mode Range
vs Supply Voltage
T
A
= 25°C
E
MOD
RAN
GE
PO
VE
SITI
COM
MON
NEG
ATIV
E CO
MM
ON
MOD
E RA
NGE
±2
±3
±4
±6
±5
SUPPLY VOLTAGE (V)
±7
±8
LTC1100 • TPC05
LTC1100 • TPC06
Output Voltage Swing vs Load
10
9
8
7
6
5
4
3
2
1
Undistorted Output Swing
vs Frequency
V
S
=
±5V
R
L
= 100k
R
L
= 2k
0
1
2
3 4 5 6 7 8
LOAD RESISTANCE (kΩ)
9
10
0
100
1k
10k
FREQUENCY (Hz)
100k
LTC1100 • TPC09
LTC1100 • TPC08
Voltage Noise vs Frequency
V
S
=
±5V
105
90
75
60
45
30
15
0
3
4
10
100
1k
10k
FREQUENCY (Hz)
100k
0
3
4
Internal Sampling Frequency
vs Supply Voltage
T
A
= –55°C
T
A
= 25°C
2
T
A
= 125°C
1
2
6
10 12 14 16
4
8
TOTAL SUPPLY VOLTAGE V
+
TO V
–
(V)
18
LTC1100 • TPC10
LTC1100 • TPC11
LTC1100 • TPC12
1100fc
5
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