LTC1100
Precision, Chopper-Stabilized
Instrumentation Amplifier
FEATURES
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Offset Voltage: 10µV Max
Offset Voltage Drift: 50nV/°C Max
Bias Current: 50pA Max
Offset Current: 50pA Max
Gain Nonlinearity: 8ppm Max
Gain Error:
±0.05%
Max
CMRR: 104dB
0.1Hz to 10Hz Noise: 2µV
P-P
Single 5V Supply Operation
8-Pin MiniDIP
The LTC1100 is a high precision instrumentation ampli-
fier using chopper-stabilization techniques to achieve
outstanding DC performance. The input DC offset is
typically 1µV while the DC offset drift is typically 10nV/°C;
a very low bias current of 50pA 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 8ppm 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.
LTCMOS is a trademark of Linear Technology Corporation
APPLICATI
s
s
s
S
Thermocouple Amplifiers
Strain Gauge Amplifiers
Differential to Single-Ended Converters
TYPICAL APPLICATI
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
UO
UO
1
LTC1100
ABSOLUTE
AXI U
RATI GS
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
Operating Temperature Range
LTC1100M/AM ................................
−55°C
to 125°C
LTC1100C/AC ....................................
−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
J8 PACKAGE
8-LEAD CERAMIC DIP
8
7
6
5
V
OUT
COMP
V
IN
V
+
ORDER PART
NUMBER
LTC1100ACN8
LTC1100CJ8
LTC1100CN8
LTC1100AMJ8
LTC1100MJ8
N8 PACKAGE
8-LEAD PLASTIC DIP
T
JMAX
= 150°C,
θ
JA
= 100°C/W (J)
T
JMAX
= 110°C,
θ
JA
= 130°C/W (N)
Contact factory for Industrial grade parts
ELECTRICAL CHARACTERISTICS
V
S
=
±
5V, R
L
= 10k, C
C
= 1000pF, unless otherwise specified.
PARAMETER
Gain Error
Gain Nonlinearity
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
Internal Sampling Frequency
Bandwidth
V
CM
= 2.3V to
−4.7V
(Note 2)
V
S
=
±2.375V
to
±8V
R
L
= 2k, V
S
=
±8V
R
L
=10k, V
S
=
±8V
T
A
= 25°C
q
CONDITIONS
T
A
= 25°C
q
T
A
= 25°C
q
(Note 1)
(Note 1)
DC to 10Hz, T
A
= 25°C
T
A
= 25°C
q
q
q
q
q
q
q
T
A
= 25°C
T
A
= 25°C
2
U
U
W
W W
U
W
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
S PACKAGE
16-LEAD PLASTIC SOL
T
JMAX
= 110°C,
θ
JA
= 100°C/W
ORDER PART
NUMBER
LTC1100ACS
LTC1100CS
NC 8
NC
LTC1100ACN (Note 3)
MIN
TYP
MAX
0.01
3
12
±1
±5
1.9
2.5
10
104
120
– 7.2
– 7.7
2.4
3.4
2.8
18
6.2
7.5
2.8
4.0
115
50
120
50
0.05
0.10
8
30
±10
±100
LTC1100CN/CJ
MIN
TYP
MAX
0.01
3
12
±1
±5
1.9
2.5
10
90
105
– 7.2
– 7.7
2.4
3.4
2.8
18
6.2
7.5
3.3
4.5
110
65
135
65
0.075
0.150
20
60
±10
±100
UNITS
±%
±%
ppm
ppm
µV
nV/°C
µV
P-P
pA
pA
pA
dB
dB
V
V
mA
mA
kHz
kHz
LTC1100
ELECTRICAL CHARACTERISTICS
V
S
=
±
5V, R
L
= 10k, C
C
= 1000pF, unless otherwise specified.
PARAMETER
Gain Error
Gain Nonlinearity
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
Internal Sampling Frequency
Bandwidth
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
T
A
= 25°C
q
CONDITIONS
T
A
= 25°C
q
LTC1100AMJ (Note 3)
MIN
TYP
MAX
0.01
3
q
LTC1100MJ
MIN
TYP
MAX
0.01
3
±1
±5
1.9
5
0.075
0.150
20
65
±10
±100
65
450
120
90
95
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
T
A
= 25°C
(Note 1)
(Note 1)
DC to 10Hz, T
A
= 25°C
T
A
= 25°C
q
q
q
q
q
q
q
±1
±5
1.9
5
100
115
– 7.4
– 7.0
2.4
4.2
2.8
18
7.4
6.0
– 7.4
– 7.0
2.4
2.8
18
7.4
6.0
3.3
4.6
V
V
mA
mA
kHz
kHz
T
A
= 25°C
T
A
= 25°C
ELECTRICAL CHARACTERISTICS
V
S
=
±5V,
R
L
= 10k, C
C
= 1000pF, unless otherwise specified.
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 1)
(Note 1)
DC to 10Hz, T
A
= 25°C
T
A
= 25°C
q
q
q
q
LTC1100ACS (Note 3)
MIN
TYP
MAX
0.01
0.01
q
q
q
MIN
LTC1100CS
TYP
MAX
0.01
0.01
3
12
1
±1
±5
1.9
2.5
10
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
0.05
0.10
0.04
0.10
8
30
8
25
±10
±100
50
120
50
90
85
105
Gain Nonlinearity
3
12
1
±1
±5
1.9
2.5
10
104
95
120
115
Input Offset Voltage
Input Offset Voltage Drift
Input Noise Voltage
Input Bias Current
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
q
q
q
110
Power Supply Rejection Ratio
3
LTC1100
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage Swing
Supply Current
Internal Sampling Frequency
Bandwidth
G = 100
G = 10
CONDITIONS
R
L
=10k, V
S
=
±8V
R
L
= 2k, V
S
=
±8V
T
A
= 25°C
V
S
=
±
5V, R
L
= 10k, C
C
= 1000pF, unless otherwise specified.
LTC1100ACS (Note 3)
MIN
TYP
MAX
q
q
q
MIN
– 7.2
– 7.7
LTC1100CS
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
2.4
3.4
2.8
18
180
6.2
7.5
2.8
4.0
T
A
= 25°C
T
A
= 25°C
The
q
denotes the specifications which apply over the full operating
temperature range.
Note 1:
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 2:
See Applications Information, Single Supply Operation.
Note 3:
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
45
40
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
−
+
–
8
R
13
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
210
180
25
20
Gain Nonlinearity
vs Temperature
V
S
= ±8V
R
L
= 50k
PHASE SHIFT (DEGREES)
15
10
5
0
–5
–50
100
125
5
100
1k
10k
FREQUENCY (Hz)
100k
–30
1M
–25
75
0
25
50
TEMPERATURE (°C)
100
125
LTC1100 • TPC01
LTC1100 • TPC02
LTC1100 • TPC03
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
G = 100, R
C
= 100k
C
C
= 10pF
V
OUT
± SWING (V)
±10
±9
G = 100, R
C
=
∞
C
C
= 0pF
±8 NEGATIVE
±7
±6
±5 NEGATIVE
±4
±3
±2
±1
NEGATIVE
PEAK-TO-PEAK OUTPUT SWING (V)
CMRR (dB)
60
40
20
0
0.1
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
V
S
= ±5V
VOLTAGE NOISE DENSITY (nV/
√
Hz)
SAMPLING FREQUENCY (kHz)
BIAS CURRENT (pA)
180
120
60
0
– 60
T
A
= 125°C
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
A
DE R
-MO
NGE
PO
VE
SITI
COM
MON
NEG
ATIV
E
COM
MON
-MO
DE R
ANG
E
±2
±3
±4
±6
±5
SUPPLY VOLTAGE (V)
±7
±8
LTC1100 • TPC05
LTC1100 • TPC06
Output Voltage Swing vs Load
10
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
Undistorted Output Swing
vs Frequency
9
8
7
6
5
4
3
2
1
0
100
1k
10k
FREQUENCY (Hz)
100k
LTC1100 • TPC09
V
S
= ±5V
R
L
= 100k
R
L
= 2k
0
0
1
2
3 4 5 6 7 8
LOAD RESISTANCE (kΩ)
9
10
LTC1100 • TPC08
Voltage Noise vs Frequency
105
90
75
60
45
30
15
0
4
0
3
4
Internal Sampling Frequency
vs Supply Voltage
T
A
= –55°C
T
A
= 25°C
2
T
A
= 125°C
1
3
10
100
1k
10k
FREQUENCY (Hz)
100k
2
6
10 12 14 16
4
8
TOTAL SUPPLY VOLTAGE V
+
TO V
–
(V)
18
LTC1100 • TPC10
LTC1100 • TPC11
LTC1100 • TPC12
5
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