Linear LT1101ISW Precision, micropower, single supply instrumentation amplifier (fixed gain = 10 or 100) Datasheet

LT1101
Precision, Micropower,
Single Supply Instrumentation
Amplifier (Fixed Gain = 10 or 100)
DESCRIPTIO
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FEATURES
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The LT®1101 establishes the following milestones:
(1) It is the first micropower instrumentation amplifier,
(2) It is the first single supply instrumentation amplifier,
(3) It is the first instrumentation amplifier to feature fixed
gains of 10 and/or 100 in low cost, space-saving 8-lead
packages.
Gain Error: 0.04% Max
Gain Nonlinearity: 0.0008% (8ppm) Max
Gain Drift: 4ppm/°C Max
Supply Current: 105µA Max
Offset Voltage: 160µV Max
Offset Voltage Drift: 0.4µV/°C Typ
Offset Current: 600pA Max
CMRR, G = 100: 100dB Min
0.1Hz to 10Hz Noise: 0.9µVp-p Typ
2.3pAp-p Typ
Gain Bandwidth Product: 250kHz Min
Single or Dual Supply Operation
Surface Mount Package Available
The LT1101 is completely self-contained: no external gain
setting resistor is required. The LT1101 combines its
micropower operation (75µA supply current) with a
gain error of 0.008%, gain linearity of 3ppm, gain drift of
1ppm/°C. The output is guaranteed to drive a 2k load to
±10V with excellent gain accuracy.
Other precision specifications are also outstanding:
50µV input offset voltage, 130pA input offset current, and
low drift (0.4µV/°C and 0.7pA/°C). In addition, unlike other
instrumentation amplifiers, there is no output offset
voltage contribution to total error.
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APPLICATIO S
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Differential Signal Amplification in Presence of
Common Mode Voltage
Micropower Bridge Transducer Amplifier
– Thermocouples
– Strain Gauges
– Thermistors
Differential Voltage-to-Current Converter
Transformer Coupled Amplifier
4mA to 20mA Bridge Transmitter
A full set of specifications are provided with ±15V dual
supplies and for single 5V supply operation. The LT1101
can be operated from a single lithium cell or two Ni-Cad
batteries. Battery voltage can drop as low as 1.8V, yet the
LT1101 still maintains its gain accuracy. In single supply
applications, both input and output voltages swing
to within a few millivolts of ground. The output sinks
current while swinging to ground—no external, power
consuming pull down resistors are needed.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
Gain Error Distribution
GROUND 1
(REF)
8
9R
9R
R
–
20
G = 100
RL = 50k
TA = 25°C
930 UNITS
TESTED
IN ALL PACKAGES
15
10
B
R ≈ 9.2k
+
A
+
7 SHORT TO 8
G = 10
N.C. G = 100
R
–
INVERTING 3
INPUT
4
V–
25
90R
PERCENT OF UNITS
90R
SHORT TO 1, 2
G = 10
N.C. G = 100
30
OUTPUT
GROUND PIN 1, OUTPUT AT PIN 8
G = 100: NO ADDITIONAL CONNECTIONS
G = 10: SHORT PIN 2 TO PIN 1, SHORT PIN 7 TO PIN 8
6 NONINVERTING
INPUT
5 +
V
LT1101 • TA01
5
0
–0.04 –0.03 –0.02 –0.01 0 0.01 0.02 0.03 0.04
GAIN ERROR (%)
LT1101 • TA02
1101fa
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LT1101
RATI GS (Note 1)
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Supply Voltage ...................................................... ±22V
Differential Input Voltage ....................................... ±36V
Input Voltage ............... Equal to Positive Supply Voltage
..........10V Below Negative Supply Voltage
Output Short Circuit Duration .......................... Indefinite
Operating Temperature Range
LT1101AM/LT1101M (OBSOLETE) ... – 55°C to 125°C
LT1101AI/LT1101I .............................. –40°C to 85°C
LT1101AC/LT1101C ................................ 0°C to 70°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
U
U
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PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUTPUT
8
OUT
G = 10
90R 7
90R R
9R
–
+
–IN 3
GROUND
(REF) 1
8
90R
9R
6 +IN
R
R
–
+
–IN 3
5 V+
9R
NC 1
OUTPUT
NC 3
REF 4
G = 10
–IN 5
OUT
7
G = 10
6
+IN
NC 6
V– 7
R ≈ 9.2k
V– 4
4
V – (CASE)
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W
5
V+
15 OUTPUT
90R
90R
9R
9R
R
–
+
14 NC
13 OUT
G = 10
R
R ≈ 9.2k
12 +IN
11 NC
10 V +
NC 8
9
N PACKAGE 8-LEAD PDIP
TJMAX = 150°C, θJA = 130°C/W
SW PACKAGE
16-LEAD PLASTIC SO
J PACKAGE 8-LEAD CERDIP
TJMAX = 150°C, θJA = 100°C/W
TJMAX = 150°C, θJA = 100°C/W
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1101AMH
LT1101MH
LT1101ACH
LT1101CH
16 NC
GND (REF) 2
90R
REF
G = 10 2
9R
R
+
–
REF
2
G = 10
TOP VIEW
+
–
GROUND
(REF) 1
TOP VIEW
+
–
W W
AXI U
U
ABSOLUTE
LT1101AMJ8
LT1101MJ8
LT1101ACJ8
LT1101CJ8
NC
ORDER PART
NUMBER
LT1101SW
LT1101ISW
LT1101AIN8
LT1101IN8
LT1101ACN8
LT1101CN8
OBSOLETE PACKAGES
Consider the N8 as an Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
otherwise noted. (Note 4)
VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, G = 10 or 100, TA = 25°C, unless
SYMBOL PARAMETER
CONDITIONS
GE
Gain Error
G = 100, V0 = 0.1V to 3.5V, RL = 50k
G = 10, V0 = 0.1V to 3.5V, RL = 50k
GNL
Gain Nonlinearity
G = 100, RL = 50k
G = 10, RL = 50k (Note 2)
VOS
Input Offset Voltage
LT11O1AM/AI/AC
MIN
TYP
MAX
MIN
LT1101M/I/C
TYP
MAX
UNITS
0.010
0009
0.050
0.040
0.011
0.010
0.075
0.060
20
3
60
7
20
3
75
8
ppm
ppm
50
160
60
250
220
600
µV
µV
0.13
0.60
0.15
0.90
nA
nA
LT1101SW
lOS
Input Offset Current
IB
Input Bias Current
6
8
6
10
IS
Supply Current
75
105
78
120
%
%
µA
1101fa
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LT1101
ELECTRICAL CHARACTERISTICS
otherwise noted. (Note 4)
VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, G = 10 or 100, TA = 25°C, unless
LT11O1AM/AI/AC
MIN
TYP
MAX
SYMBOL PARAMETER
CONDITIONS
CMRR
Common Mode
Rejection Ratio
1k Source Imbalance
G = 100, VCM = 0.07V to 3.4V
G = 10, VCM = 0.07V to 3.1V
Minimum Supply Voltage
(Note 5)
Maximum 0utput
Voltage Swing
Output High, 50k to GND
Output High, 2k to GND
Output Low, VREF = 0, No Load
Output Low, VREF = 0, 2k to GND
Output Low, VREF = 0, lSINK = 100µA
4.1
3.5
VO
95
84
106
100
1.8
4.3
3.9
3.3
0.5
90
MIN
92
82
2.3
LT1101M/I/C
TYP
MAX
105
99
1.8
4.1
3.5
6
1
130
4.3
3.9
3.3
0.5
90
UNITS
dB
dB
2.3
V
6
1
130
V
V
mV
mV
mV
BW
Bandwidth
G = 100 (Note 2)
G = 10 (Note 2)
2.0
22
3.0
33
2.0
22
3.0
33
kHz
kHz
SR
Slew Rate
(Note 2)
0.04
0.07
0.04
0.07
V/µs
LT1101AM/AI/AC
MIN
TYP
MAX
MIN
VS = ±15V, VCM = 0V, TA = 25°C, Gain = 10 or 100, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
GE
Gain Error
G = 100, VO = ±10V, RL = 50k
G = 100, VO = ±10V, RL = 2k
G = 100, VO = ±10V, RL = 50k or 2k
GNL
Gain Nonlinearity
G = 100, RL = 50k
G = 100, RL = 2k
G = 10, RL = 50k or 2k
VOS
Input Offset Voltage
lOS
Input Offset Current
IB
Input Bias Current
en
in
0.040
0.055
0.040
0.009
0.012
0.009
0.060
0.070
0.060
7
24
3
16
45
8
8
25
3
20
60
9
ppm
ppm
ppm
50
160
60
250
220
600
µV
µV
0.13
0.60
0.15
0.90
nA
6
8
6
10
nA
Input Resistance
Common Mode
Differential Mode
(Note 2)
(Note 2)
Input Noise Voltage
0.1Hz to 10Hz (Note 3)
0.9
Input Noise Voltage
Density
fO = 10Hz (Note 3)
fO = 1000Hz (Note 3)
Input Noise Current
7
12
3
5
%
%
%
7
12
GΩ
GΩ
1.8
0.9
µVp-p
45
43
64
54
45
43
nV/√Hz
nV/√Hz
0.1Hz to 10Hz (Note 3)
2.3
4.0
2.3
pAp-p
Input Noise Current
Density
fO =10Hz (Note 3)
fO = 1000Hz
0.06
0.02
0.10
0.06
0.02
pA/√Hz
pA/√Hz
lnput Voltage Range
G = 100
G = 10
CMRR
UNITS
0.008
0.011
0.008
LT1101SW
4
7
LT1101M/I/C
TYP
MAX
13.0
– 14.4
11.5
– 13.0
13.8
– 14.7
12.5
– 13.3
13.0
– 14.4
11.5
– 13.0
13.8
– 14.7
12.5
– 13.3
V
V
V
V
Common Mode
Rejection Ratio
1k Source Imbalance
G = 100, Over CM Range
G = 10, Over CM Range
100
84
112
100
98
82
112
99
dB
dB
PSRR
Power Supply
Rejection Ratio
VS = +2.2V, –0.1V to ±18V
102
114
100
114
dB
IS
Supply Current
92
130
94
150
µA
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LT1101
ELECTRICAL CHARACTERISTICS
VS = ±15V, VCM = 0V, TA = 25°C, Gain = 10 or 100, unless otherwise noted.
MIN
LT1101M/I
TYP
14.2
13.2
13.0
11.0
14.2
13.2
V
V
2.3
25
3.5
37
2.3
25
3.5
37
kHz
kHz
0.06
0.10
0.06
0.10
V/µs
SYMBOL PARAMETER
CONDITIONS
MIN
VO
Maximum 0utput
Voltage Swing
RL = 50k
RL = 2k
13.0
11.0
BW
Bandwidth
G = 100 (Note 2)
G = 10 (Note 2)
SR
Slew Rate
LT1101AM/AI
TYP
MAX
MAX
UNITS
ELECTRICAL CHARACTERISTICS
VS = ±15V, VCM = 0V, Gain = 10 or 100, –55°C ≤ TA ≤ 125°C for AM/M
grades, –40°C ≤ TA ≤ 85°C for AI/I grades, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
GE
Gain Error
G = 100, VO = ±10V, RL = 50k
G = 100, VO = ±10V, RL = 5k
G = 10, VO = ±10V, RL = 50k or 5k
TCGE
Gain Error Drift
(Note 2)
GNL
Gain Nonlinearity
VOS
Input Offset Voltage
MIN
LT1101AM/AI
TYP
MAX
MIN
LT1101M/I
TYP
MAX
UNITS
%
%
%
0.024
0.030
0.015
0.070
0.100
0.070
0.026
0.035
0.018
0.100
0.130
0.100
G = 100, RL = 50k
G = 100, RL = 5k
G = 10, RL = 50k or 5k
2
2
1
4
7
4
2
2
1
5
8
5
G = 100, RL = 50k
G = 100, RL = 5k
G = 10, RL = 50k
G = 10, RL = 5k
24
70
4
10
70
300
13
40
26
75
5
12
90
500
15
60
ppm
ppm
ppm
ppm
90
350
110
110
500
950
µV
µV
0.4
2.0
0.5
0.5
2.8
4.8
µV/°C
mV/°C
0.16
0.80
0.19
1.30
nA
0.5
4.0
0.8
7.0
pA/°C
7
10
7
12
nA
10
25
10
30
pA/°C
LT1101ISW
(Note 2)
LT1101ISW
ppm/°C
ppm/°C
ppm/°C
∆VOS/∆T
Input Offset Voltage Drift
lOS
Input Offset Current
∆lOS/∆T
Input Offset Current Drift
IB
Input Bias Current
∆IB/∆T
Input Bias Current Drift
(Note 2)
CMRR
Common Mode
Rejection Ratio
G = 100, VCM = –14.4V to 13V
G = 100, VCM = –13V to 11.5V
96
80
111
99
94
78
111
98
dB
dB
PSRR
Power Supply
Rejection Ratio
VS = 3.0, –0.1V to ±18V
98
110
94
110
dB
IS
Supply Current
VO
Maximum 0utput
Voltage Swing
(Note 2)
105
RL = 50k
RL = 5k
12.5
11.0
14.0
13.5
165
108
12.5
11.0
14.0
13.5
190
µA
V
V
1101fa
4
LT1101
ELECTRICAL CHARACTERISTICS
otherwise noted.
VS = ±15V, VCM = 0V, Gain = 10 or 100, 0°C ≤ TA ≤ 70°C, unless
LT1101AC
TYP
MAX
0.012
0.018
0.009
G = 100, RL = 50k
G = 100, RL = 2k
G = 10, RL = 50k or 5k
G = 100, RL = 50k
G = 100, RL = 2k
G = 10, RL = 50k or 2k
SYMBOL PARAMETER
CONDITIONS
GE
Gain Error
G = 100, VO = ±10V, RL = 50k
G = 100, VO = ±10V, RL = 2k
G = 10, VO = ±10V, RL = 50k or 2k
TCGE
Gain Error Drift
(Note 2)
GNL
Gain Nonlinearity
VOS
Input Offset Voltage
MIN
LT1101C/S
TYP
MAX
UNITS
0.055
0.085
0.055
0.014
0.020
0.010
0.080
0.100
0.080
%
%
%
1
2
1
4
7
4
1
2
1
5
9
5
9
33
4
25
75
10
10
36
4
35
100
11
ppm
ppm
ppm
70
250
85
300
350
800
µV
µV
0.4
2.0
0.5
1.2
2.8
4.5
µV/°C
µV/°C
0.14
0.70
0.17
1.10
nA
0.5
4.0
0.8
7.0
pA/°C
6
9
6
11
nA
10
25
10
30
pA/°C
MIN
LT1101SW
(Note 2)
LT1101SW
ppm/°C
ppm/°C
ppm/°C
∆VOS/∆T
Input Offset Voltage Drift
lOS
Input Offset Current
∆IOS/∆T
Input Offset Current Drift
IB
Input Bias Current
∆IB/∆T
Input Bias Current Drift
(Note 2)
CMRR
Common Mode
Rejection Ratio
G = 100, VCM = –14.4V to 13V
G = 100, VCM = –13V to 11.5V
98
82
112
100
96
80
112
99
dB
dB
PSRR
Power Supply
Rejection Ratio
VS = 2.5, –0.1V to ±18V
100
112
97
112
dB
IS
Supply Current
VO
Maximum 0utput
Voltage Swing
(Note 2)
98
RL = 50k
RL = 2k
±12.5
±10.5
±14.1
±13.0
148
100
±12.5
±10.5
±14.1
±13.0
170
µA
V
V
1101fa
5
LT1101
ELECTRICAL CHARACTERISTICS
VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, Gain = 10 or 100,
– 40°C ≤ TA ≤ 85°C for AI/I grades, unless otherwise noted (Note 4).
SYMBOL PARAMETER
CONDITIONS
GE
Gain Error
G = 100, V0 = 0.1V to 3.5V, RL = 50k
G = 10, VCM = 0.15, RL = 50k
TCGE
Gain Error Drift
GNL
Gain Nonlinearity
VOS
Input Offset Voltage
MIN
LT1101AM/AI
TYP
MAX
MIN
LT1101M/I
TYP
MAX
UNITS
%
%
0.026
0.011
0.080
0.070
0.028
0.014
0.120
0.100
RL = 50k (Note 2)
1
4
1
5
G = 100, RL = 50k
G = 10, RL = 50k (Note 2)
45
4
110
13
48
5
140
15
ppm
ppm
90
350
110
110
500
950
µV
µV
0.4
2.0
0.5
0.5
2.8
4.8
µV/°C
µV/°C
0.16
0.80
0.19
1.30
nA
0.5
4.0
0.8
7.0
pA/°C
7
10
7
12
nA
10
25
10
30
pA/°C
LT1101ISW
∆VOS/∆T
Input Offset Voltage Drift
(Note 2)
LT1101ISW
lOS
Input Offset Current
∆VOS/∆T
Input Offset Current Drift
IB
Input Bias Current
∆IB/∆T
Input Bias Current Drift
(Note 2)
CMRR
Common Mode
Rejection Ratio
G = 100, VCM = 0.1V to 3.2V
G = 10, VCM = 0.1V to 2.9V, VREF = 0.15V
IS
Supply Current
V0
Maximum 0utput
Voltage Swing
(Note 2)
91
80
105
98
88
Output High, 50k to GND
Output High, 2k to GND
Output Low, VREF = 0, No Load
Output Low, VREF = 0, 2k to GND
Output Low, VREF = 0, ISINK = 100µA
3.8
3.0
4.1
3.7
4.5
0.7
125
88
77
135
92
3.8
3.0
8
1.5
170
104
97
4.1
3.7
4.5
0.7
125
ppm/°C
dB
dB
160
µA
8
1.5
170
V
V
mV
mV
mV
1101fa
6
LT1101
ELECTRICAL CHARACTERISTICS
0°C ≤ TA ≤ 70°C, unless otherwise noted (Note 4).
VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, Gain = 10 or 100,
SYMBOL PARAMETER
CONDITIONS
GE
Gain Error
G = 100, VO = 0.1V to 3.5V, RL = 50k
G = 10, VCM = 0.15V, RL = 50k
TCGE
Gain Error Drift
GNL
Gain Nonlinearity
VOS
Input Offset Voltage
MIN
LT1101AC
TYP
MAX
MIN
LT1101C/S
TYP
MAX
UNITS
%
%
0.017
0.010
0.065
0.060
0.018
0.012
0.095
0.080
RL = 50k (Note 2)
1
4
1
5
G = 100, RL = 50k
G = 10, RL = 50k (Note 2)
25
4
80
10
25
4
100
11
ppm
ppm
70
250
85
300
350
800
µV
µV
0.4
2.0
0.5
1.2
2.8
4.5
µV/°C
µV/°C
0.14
0.70
0.17
1.10
nA
0.5
4.0
0.8
7
pA/°C
6
9
6
11
nA
10
25
10
30
pA/°C
LT1101SW
∆VOS/∆T
Input Offset Voltage Drift
(Note 2)
LT1101SW
lOS
Input Offset Current
∆IOS/∆T
Input Offset Current Drift
IB
Input Bias Current
∆IB/∆T
Input Bias Current Drift
(Note 2)
CMRR
Common Mode
Rejection Ratio
G = 100, VCM = 0.07V to 3.3V
G = 10, VCM = 0.07V to 3V, VREF = 0.15V
IS
Supply Current
VO
Maximum 0utput
Voltage Swing
(Note 2)
93
82
105
99
80
Output High, 50k to GND
Output High, 2k to GND
Output Low, VREF = 0, No Load
Output Low, VREF = 0, 2k to GND
Output Low, VREF = 0, ISINK = 100µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: This parameter is not tested. It is guaranteed by design and by
inference from other tests.
Note 3: This parameter is tested on a sample basis only.
4.0
3.3
4.2
3.8
4
0.6
100
90
80
120
7
1.2
150
104
98
85
4.0
3.3
ppm/°C
4.2
3.8
4
0.6
100
dB
dB
145
µA
7
1.2
150
V
V
mV
mV
mV
Note 4: These test conditions are equivalent to VS = 4.9V, – 0.1V,
VCM = 0V, VREF(PIN1) = 0V.
Note 5: Minimum supply voltage is guaranteed by the power supply
rejection test. The LT1101 actually works at 1.8V supply with minimal
degradation in performance.
1101fa
7
LT1101
U W
TYPICAL PERFOR A CE CHARACTERISTICS
30
50
VS = ± 15V
TA = 25°C
RL ≥ 50kΩ
25
20
PERCENT OF UNITS
708 UNITS
TESTED IN
ALL PACKAGES
15
10
Gain vs Frequency
40
VS = ± 15V
TA = 25°C
RL ≥ 2kΩ
30
708 UNITS
TESTED IN
ALL PACKAGES
20
VS = ± 15V
TA = 25°C 40
G = 100
0
–0.5
30
–1.0
–1.5
G = 10
0
20
GAIN (dB)
PERCENT OF UNITS
Gain = 10 Nonlinearity
Distribution
GAIN ERROR (%)
Gain = 100 Nonlinearity
Distribution
–0.5
10
5
0
16
0
18
–1.5
2
6
8
4
GAIN NONLINEARITY (PPM)
0
LT1101 • TPC01
Gain Error Over Temperature
4
6
0.01
7
GAIN NONLINEARITY (PPM)
0.02
1
VOLTAGE
GAIN ERROR (%)
0.03
50
25
0
75
TEMPERATURE (°C)
100
SEE GAIN VS T
FOR DEFINITIONS
50
4
40
30
2
20
OFFSET CURRENT (pA)
VS = 5V, 0V
200
BIAS CURRENT (nA)
90
70
60
50
25
75
0
TEMPERATURE (°C)
100
10
6
7
50
25
75
0
TEMPERATURE (°C)
100
0
125
–200
125
LT1101 • TPC07
–100
200
0
100
INPUT OFFSET VOLTAGE (µV)
LT1101 • TPC06
–5
Input Bias Current vs
Common Mode Voltage
0
VS = 5V, 0V TO ±15V
150
VS = 5V, 0V
–2
IOS
100
80
50
–50 –25
20
Input Bias and Offset Currents vs
Temperature
VS = ±15V
TA = 25°C
746 UNITS MEASURED IN ALL PACKAGES
EACH UNIT MEASURED AT VS = 15V,
0V AND AT VS = ±15V
LT1101 • TPC05
Supply Current vs Temperature
100
1M
5
LT1101 • TPC04
SUPPLY CURRENT (µA)
30
3
0
–50 –25
125
110
100k
Input Offset Voltage Distribution
1
10
5
0
–50 –25
1k
10k
FREQUENCY (Hz)
LT1101 • TPC03
Gain Nonlinearity Temperature
60
G = 100, VS = ± 15V, RL = 2k
G = 10, VS = ± 15V, RL = 2k
G = 100, VS = ± 15V, RL = 5k
G = 100, VS = 5V, 0V, RL = 50k
2
G = 100, VS = ± 15V, RL = 50k
G = 10, VS = ± 15V, RL = 5k
G = 10, VS = ± 15V or 5V, 0V, 3
RL = 50k
100
LT1101 • TPC02
0.05
1
2
3
4
5
6
7
10
10
PERCENT OF UNITS
6
4
8 10 12 14
GAIN NONLINEARITY (PPM)
INPUT BIAS CURRENT (nA)
2
0
0.04
10
–1.0
IB
–6
–7
– 50 – 25
–4
TA = 25°C
–6
TA = –55°C
TA = 125°C
–8
–10
50
25
0
75
TEMPERATURE (°C)
100
125
LT1101 • TPC08
–12
–1
0
1
2
3
COMMON MODE VOLTAGE (V)
4
LT1101 • TPC09
1101fa
8
LT1101
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Rejection Ratio vs
Frequency
80
60
40
V + –1
25°C
V + –3
G = 10
ALL
TEMPERATURES
V– 1
G = 10
G = 100
10
100
1k
FREQUENCY (Hz)
1
10k
±2 ±4
±6 ±8 ±10 ±12 ±14 ±16 ±18
SUPPLY VOLTAGE (V)
ISINK = 1µA
10
NO LOAD
V+ –1
0
25
50
75
25°C
–55°C
V– 2
125°C
25°C
V– 1
V–
0.01
0.1
1
10
SOURCING OR SINKING LOAD CURRENT (mA)
125
TEMPERATURE (°C)
PEAK-TO-PEAK OUTPUT SWING, VS = ± 15V (V)
TA = 25°C
80
G = 10
60
G = 100
40
20
0
1
10
CAPACITIVE LOAD (nF)
TA = 25°C, VS = 5V, 0V
TA = 25°C, VS = ± 15V
20
10
TA = 125°C, VS = 5V, 0V
0
TA = 125°C, VS = ± 15V
–10
TA = 125°C, VS = ± 15V
–20
TA = 5°C, VS = ± 15V
–30
–40
1
2
3
0
TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
LT1101 • TPC15
Undistorted Output Swing vs
Frequency
Capacitive Load Handling
100
100k
30
LT1101 • TPC14
LT1101 • TPC13
VS = ± 2.0V TO
± 15V
1k
10k
FREQUENCY (Hz)
Short-Circuit Current vs Time
–55°C
100
100
LT1101 • TPC12
V+ –2
RL = 5k TO GROUND
OVERSHOOT (%)
10
40
125°C
ISINK = 10µA
0.1
20
Output Voltage Swing vs Load
Current
OUTPUT VOLTAGE SWING (V)
SATURATION VOLTAGE (mV)
100
100
40
LT1101 • TPC11
ISINK = 2mA
ISINK = 100µA
NEGATIVE
SUPPLY
60
30
Output Impedance vs Frequency
TA = 25°C
LOAD, RL, TO GROUND
5
VS = 5V, 0V, RL ≥ 100k
20
4
VS = ±15V
RL ≥ 100k
VS = 5V, 0V,
RL ≥ 1k
3
10
2
VS = ±15V
RL ≥ 30k
0
100
1k
10k
FREQUENCY (Hz)
1
100
0
1k
OUTPUT IMPEDANCE (Ω)
VS = 5V, 0V
POSITIVE
SUPPLY
80
V+
ISINK = 1mA
120
100
0
0
Output Saturation vs Temperature
vs Sink Current
1
–50 –25
TA = 25°C
V–
100k
LT1101 • TPC10
1000
– 55°C
V– 2
VS = ± 15V
TA = 25°C
0.1
125°C
V + –2
SHORT-CIRCUIT CURRENT (mA)
SINKING
SOURCING
0
125°C
25°C
PEAK-TO-PEAK OUTPUT SWING, VS = 5V, 0V (V)
20
– 55°C
POWER SUPPLY REJECTION RATIO (dB)
G = 10
120
G = 100
G = 100
100
Power Supply Rejection Ratio vs
Frequency
V+
G = 100
C = 82pF PIN 1 TO PIN 2
COMMON MODE RANGE (V)
COMMON MODE REJECTION RATIO (dB)
120
Common Mode Range vs Supply
Voltage
100
G = 100
10
G = 10
1
0.1
10
10k
100
1k
FREQUENCY (Hz)
100k
LT1101 • TPC16
LT1101 • TPC17
LT1101 • TPC18
1101fa
9
LT1101
U W
TYPICAL PERFOR A CE CHARACTERISTICS
VS = ± 2.5V TO ± 15V
TA = 25°C
300
CURRENT
NOISE
100
VOLTAGE
NOISE
30
1/f CORNER
0.6Hz
10
0.1
0.8
CHANGE IN OFFSET VOLTAGE (µV)
VOLTAGE NOISE DENSITY (nV/√Hz)
VOLTAGE NOISE DENSITY (fA/√Hz)
1000
Large Signal Transient Response
G = 10, VS = 5V, 0V
Warm-Up Drift
VS = ± 15V
TA = 25°C
WARM UP DRIFT
0.6 AT VS = 5V, 0V IS
IMMEASURABLY LOW
1V/DIV
Noise Spectrum
0.4
0.2
50µs/DIV
OUTPUT FROM 0V TO 4.5V, NO LOAD
0
1
10
100
FREQUENCY (Hz)
1000
0
1
2
TIME AFTER POWER ON (MINUTES)
LT1101 • TPC20
LT1101 • TPC19
Large Signal Transient Response
G = 100, VS = 5V, 0V
Large Signal Transient Response
G = 100, VS = ±15V
5V/DIV
1V/DIV
Large Signal Transient Response
G = 10, VS = 15V
5V/DIV
LT1101 • TPC20.1
3
200µs/DIV
NO LOAD
100µs/DIV
OUTPUT FROM 0V TO 4.5V, NO LOAD
200µs/DIV
NO LOAD
LT1101 • TPC20.2
LT1101 • TPC20.3
20µs/DIV
OUTPUT FROM 0.05V TO 0.15V, NO LOAD
LT1101 • TPC20.5
Small Signal Transient Response
G = 100, VS = 5V, 0V
Small Signal Transient Response
G = 10, VS = ±15V
20V/DIV
20mV/DIV
20mV/DIV
Small Signal Transient Response
G = 10, VS = 5V, 0V
LT1101 • TPC20.4
20µs/DIV
LT1101 • TPC20.6
200µs/DIV
OUTPUT FROM 0.05V TO 0.15V, NO LOAD
(RESPONSE WITH VS = ±15V, G = 100 IS IDENTICAL)
LT1101 • TPC20.7
1101fa
10
LT1101
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Single Supply: Minimum Output
Voltage vs Common Mode
Voltage
10
125°C
100
G = 10
25°C
80
–55°C
60
125°C
25°C
40
–55°C
20
0
G = 100
0
2
V+ = 1.8V TO 15V
V– = OV
4
6
8
OUTPUT VOLTAGE (V)
10
2.5
V+ = 1.8V TO 15V
V– = OV
NO LOAD
9
COMMON MODE VOLTAGE (V)
MINIMUM COMMON MODE VOLTAGE (V)
120
8
25°C
7
–55°C
6
25°C
125°C
5
4
G = 100
–55°C
125°C
3
2
G = 10
1
12
0
10 20 30 40 50 60 70 80 90 100
MINIMUM OUTPUT VOLTAGE (mV)
0
LT1101 • TPC21
Minimum Supply Voltage vs
Temperature
MINIMUM SUPPLY, OUTPUT SWING,
COMMON MODE RANGE (V)
Single Supply: Minimum
Common Mode Voltage vs
Output Voltage
V – = 0V
2.0
MINIMUM
SUPPLY VOLTAGE
OUTPUT SWING
AT MINIMUM SUPPLY
1.5
1.0
0.5
COMMON-MODE RANGE
AT MINIMUM SUPPLY
0
–50
–25
50
25
0
75
TEMPERATURE (°C)
LT1101 • TPC22
100
125
LT1101 • TPC23
U
W
U U
APPLICATIO S I FOR ATIO
Single Supply Applications
The LT1101 is the first instrumentation amplifier which is
fully specified for single supply operation, (i.e. when the
negative supply is 0V). Both the input common mode
range and the output swing are within a few millivolts of
ground.
Probably the most common application for instrumentation amplifiers is amplifying a differential signal from a
transducer or sensor resistance bridge. All competitive
instrumentation amplifiers have a minimum required
common mode voltage which is 3V to 5V above the
negative supply. This means that the voltage across the
bridge has to be 6V to 10V or dual supplies have to be used
(i.e., micropower) single battery usage is not attainable on
competitive devices.
The minimum output voltage obtainable on the LT1101 is
a function of the input common mode voltage. When the
common mode voltage is high and the output is low,
current will flow from the output of amplifier A into the
output of amplifier B. See the Minimum Output Voltage vs
Common Mode Voltage plot.
Similarly, the Single Supply Minimum Common Mode
Voltage vs Output Voltage plot specifies the expected
common mode range.
When the output is high and input common mode is low,
the output of amplifier A has to sink current coming from
the output of amplifier B. Since amplifier A is effectively in
unity gain, its input is limited by its output.
Common Mode Rejection vs Frequency
The common mode rejection ratio (CMRR) of the LT1101
starts to roll off at a relatively low frequency. However, as
shown on the Common Mode Rejection Ratio vs Frequency plot, CMRR can be enhanced significantly by
connecting an 82pF capacitor between pins 1 and 2. This
improvement is only available in the gain 100 configuration, and it is in excess of 30dB at 60Hz.
Offset Nulling
The LT1101 is not equipped with dedicated offset null
terminals. In many bridge transducer or sensor applications, calibrating the bridge simultaneously eliminates the
instrumentation amplifier’s offset as a source of error. For
example, in the Micropower Remote Temperature Sensor
Application shown, one adjustment removes the offset
errors due to the temperature sensor, voltage reference
and the LT1101.
1101fa
11
LT1101
U
W
U U
APPLICATIO S I FOR ATIO
A simple resistive offset adjust procedure is shown below.
If R = 5Ω for G = 10, and R = 50Ω for G = 100, then the
effect of R on gain error is approximately 0.006%.
Unfortunately, about 450µA has to flow through R to bias
the reference terminal (Pin 1) and to null out the worstcase offset voltage. The total current through the resistor
network can exceed 1mA, and the micropower advantage
of the LT1101 is lost.
15V
10k
3
5
–
8
LT1101
6
+
OUT
R
10k
– 15V
LT1101 • AI01
Another offset adjust scheme uses the LT1077 micropower
op amp to drive the reference Pin 1. Gain error and
common mode rejection are unaffected, the total current
increase is 45µA. The offset of the LT1077 is trimmed and
amplified to match and cancel the offset voltage of the
LT1101. Output offset null range is ±25mV.
1.2V TO 18V
5
8
LT1101
6
+
Rx
Gain = 10 +
R+Rx/90
The nominal value of R is 9.2kΩ. The usefulness of this
method is limited by the fact that R is not controlled to
better than ±10% absolute accuracy in production.
However, on any specific unit, 90R can be measured
between Pins 1 and 2.
Input Protection
10k
20k
–
Gains between 10 and 100 can be achieved by connecting
two equal resistors (= Rx) between Pins 1 and 2 and
Pins 7 and 8.
1
4
3
Gains Between 10 and 100
Instrumentation amplifiers are often used in harsh
environments where overload conditions can occur. The
LT1101 employs PNP input transistors, consequently the
differential input voltage can be ±30V (with ±15V
supplies, ±36V with ±18V supplies) without an increase in
input bias current. Competitive instrumentation amplifiers
have NPN inputs which are protected by back-to-back
diodes. When the differential input voltage exceeds ±1.3V
on these competitive devices, input current increases to
the milliampere level; more than ±10V differential voltage
can cause permanent damage.
When the LT1101’s inputs are pulled above the positive
supply, the inputs will clamp a diode voltage above the
positive supply. No damage will occur if the input current
is limited to 20mA.
5k POT
500Ω resistors in series with the inputs protect the LT1101
when the inputs are pulled as much as 10V below the
negative supply.
OUT
1
1
8
4
7
6
3
LT1077
4
100k
+
–
2
3.3k
–1.2V TO –18V
LT1101 • AI02
1101fa
12
LT1101
U
W
U U
APPLICATIO S I FOR ATIO
4mA to 20mA Loop Receiver
Micropower, Battery Operated Remote Temperature Sensor
3V
12V
390k
REMOTE TEMP
SENSOR
75k
LM134-3
LT1004-1.2
75k
LT1004-1.2
75k
ILOOP
6
5
+
2210Ω
7
8
LT1101
62.5Ω
62Ω
–
6
+
7
LT1101
G = 10
20k
OUTPUT
4
–
2
1
8
4
18k
OUT
10mV/°C
2
4mA TO 20mA IN – OV TO 10V OUT
TRIM OUTPUT TO 5V AT 12mA IN
1
100nA
°K
5k
5
3
2k
POT
3
10k
LT1101 • AI04
TRIM OUTPUT TO 250mV AT 25°C
TEMPERATURE RANGE = 2.5°C TO 150°C
ACCURACY = ±0.5°C
LT1101 • AI03
Voltage Controlled Current Source
Instrumentation Amplifier with ±150mA Output Current
V+ = 15V
VIN
6
5
+
8
LT1101
3
3
LT1010
+
–
OUT
8
1
R
4
4
–
9V
5
LT1101
2k
7
6
–1.5V
2
IOUT
1
RL
V – = –15V
GAIN = 10, DEGRADED BY 0.01% DUE TO LT1010
OUTPUT = ±10V INTO 75Ω (TO 1.5kHz)
DRIVES ANY CAPACITIVE LOAD
SINGLE SUPPLY APPLICATION (V+ = 5V, V– = OV):
VOUT MIN = 120mV, VOUT MAX = 3.4V
IOUT =
100VIN
R
IOUT = 0mA TO 5mA
VOLTAGE COMPLIANCE = 6.4V
(R ≤ 200Ω)
LT1101 • AI06
LT1101 • AI05
1101fa
13
LT1101
U
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APPLICATIO S I FOR ATIO
Differential Voltage Amplification from a Resistance Bridge
V+
R
TRANSDUCER
OR SENSOR
R
6
RESISTANCE
BRIDGE
R
R
5
+
8
LT1101
G = 100
3
OUT
4
–
1
SHIELD
MINIMUM VOLTAGE ACROSS BRIDGE = 20mV
MINIMUM SUPPLY VOLTAGE = 1.8V
LT1101 • AI07
Gain = 20, 110 or 200 Instrumentation Amplifier
Single Ended Output
Differential Output
6
+
+
LT1101
3
IN
–
3
+
+
OUT
IN
–
–
6
LT1101
–
8
3
–
8
OUT
1
+
+
LT1101
3
+
LT1101
1
–
6
6
8
–
8
1
1
GAIN = 200, AS SHOWN
GAIN = 20, SHORT PIN 1 TO PIN 2, PIN 7 TO PIN 8
ON BOTH DEVICES
GAIN = 110, SHORT PIN 1 TO PIN 2, PIN 7 TO PIN 8
ON ONE DEVICE, NOT ON THE OTHER
INPUT REFERRED NOISE IS REDUCED BY √2 (G = 200 OR 20)
LT1101 • AI08
1101fa
14
LT1101
U
PACKAGE DESCRIPTIO
H Package
8-Lead TO-5 Metal Can (.200 Inch PCD)
(Reference LTC DWG # 05-08-1320)
.335 – .370
(8.509 – 9.398)
DIA
.305 – .335
(7.747 – 8.509)
.040
(1.016)
MAX
.050
(1.270)
MAX
SEATING
PLANE
.165 – .185
(4.191 – 4.699)
GAUGE
PLANE
.010 – .045*
(0.254 – 1.143)
REFERENCE
PLANE
.500 – .750
(12.700 – 19.050)
.016 – .021**
(0.406 – 0.533)
.027 – .045
(0.686 – 1.143)
PIN 1
45°TYP
.028 – .034
(0.711 – 0.864)
.200
(5.080)
TYP
.110 – .160
(2.794 – 4.064)
INSULATING
STANDOFF
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND THE SEATING PLANE
.016 – .024
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS
(0.406 – 0.610) H8(TO-5) 0.200 PCD 0801
J8 Package
8-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
CORNER LEADS OPTION
(4 PLCS)
.023 – .045
(0.584 – 1.143)
HALF LEAD
OPTION
.045 – .068
(1.143 – 1.650)
FULL LEAD
OPTION
.005
(0.127)
MIN
.405
(10.287)
MAX
8
7
6
5
.025
(0.635)
RAD TYP
.220 – .310
(5.588 – 7.874)
1
2
3
.300 BSC
(7.62 BSC)
4
.200
(5.080)
MAX
.015 – .060
(0.381 – 1.524)
.008 – .018
(0.203 – 0.457)
0° – 15°
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
.045 – .065
(1.143 – 1.651)
.014 – .026
(0.360 – 0.660)
.100
(2.54)
BSC
.125
3.175
MIN
J8 0801
OBSOLETE PACKAGES
1101fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
15
LT1101
U
PACKAGE DESCRIPTIO
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.300 – .325
(7.620 – 8.255)
+.035
.325 –.015
8.255
+0.889
–0.381
.400*
(10.160)
MAX
.065
(1.651)
TYP
.009 – .015
(0.229 – 0.381)
(
.130 ± .005
(3.302 ± 0.127)
.045 – .065
(1.143 – 1.651)
(0.457 ± 0.076)
7
6
5
1
2
3
4
.255 ± .015*
(6.477 ± 0.381)
.125
(3.175) .020
MIN (0.508)
MIN
.018 ± .003
.100
(2.54)
BSC
)
8
N8 0502
NOTE:
1. DIMENSIONS ARE
INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
SW Package
16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
.050 BSC .045 ±.005
.030 ±.005
TYP
.398 – .413
(10.109 – 10.490)
NOTE 4
16
N
15
14
13
12
11
10
9
N
.325 ±.005
.420
MIN
.394 – .419
(10.007 – 10.643)
NOTE 3
1
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
1
.005
(0.127)
RAD MIN
.009 – .013
(0.229 – 0.330)
.291 – .299
(7.391 – 7.595)
NOTE 4
.010 – .029 × 45°
(0.254 – 0.737)
2
3
4
5
6
.093 – .104
(2.362 – 2.642)
7
8
.037 – .045
(0.940 – 1.143)
0° – 8° TYP
.050
(1.270)
BSC
NOTE 3
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
.004 – .012
(0.102 – 0.305)
.014 – .019
(0.356 – 0.482)
TYP
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
S16 (WIDE) 0502
1101fa
16
Linear Technology Corporation
LW/TP 1002 1K REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 1989