1
LT1101
1101fa
■
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 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.
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.
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.
Precision, Micropower,
Single Supply Instrumentation
Amplifier (Fixed Gain = 10 or 100)
FEATURES
APPLICATIO S
U
DESCRIPTIO
U
■
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
, LTC and LT are registered trademarks of Linear Technology Corporation.
Gain Error Distribution
GAIN ERROR (%)
–0.04
0
PERCENT OF UNITS
5
10
15
20
–0.02 0 0.02 0.04
25
30
–0.03 –0.01 0.01 0.03
LT1101 • TA02
930 UNITS
TESTED
IN ALL PACKAGES
G = 100
R
L
= 50k
T
A
= 25°C
TYPICAL APPLICATIO
U
–
+
–
+
LT1101 • TA01
OUTPUT
90R
9R
90R
9R
R
AB
R ≈ 9.2k
R
V+
V–
INVERTING
INPUT
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
SHORT TO 1,
G = 10
N.C. G = 100
GROUND
(REF)
8
7
6
54
3
2
1
SHORT TO 8
G = 10
N.C. G = 100
NONINVERTING
INPUT
2
LT1101
1101fa
ABSOLUTE AXI U RATI GS
WWWU
Supply Voltage ...................................................... ±22V
Differential Input Voltage ....................................... ±36V
Input Voltage ............... Equal to Positive Supply Voltage
..........10V Below Negative Supply Voltage
Output Short Circuit Duration .......................... Indefinite
(Note 1)
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
PACKAGE/ORDER I FOR ATIO
UU
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LT1101AIN8
LT1101IN8
LT1101ACN8
LT1101CN8
LT1101SW
LT1101ISW
OBSOLETE PACKAGES
Consider the N8 as an Alternate Source
LT1101AMH
LT1101MH
LT1101ACH
LT1101CH
ORDER PART
NUMBER
ORDER PART
NUMBER
ORDER PART
NUMBER
OUT
G = 10
REF
G = 10
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
NC
GND (REF)
NC
–IN
NC
V–
NC
NC
NC
NC
V+
NC
OUTPUT
+IN
+
–
+
–
R ≈ 9.2k
90R
9R
90R
9R
RR
SW PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 150°C, θ
JA
= 100°C/W
+
–
+
–
1
2
3
4 5
6
7
8
TOP VIEW
V–
–IN
OUTPUT
OUT
G = 10
REF
G = 10
GROUND
(REF)
+IN
R ≈ 9.2k
90R
9R
90R
9R
RR
V+
T
JMAX
= 150°C, θ
JA
= 130°C/W
TOP VIEW
OUT
G = 10
OUTPUT
REF
G = 10 +IN
90R
90R RR
9R
9R
V
+
–IN
V
–
(CASE)
GROUND
(REF)
8
7
6
5
3
2
1
4
H PACKAGE
8-LEAD TO-5 METAL CAN
+
–
+
–
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W
LT1101AMJ8
LT1101MJ8
LT1101ACJ8
LT1101CJ8
T
JMAX
= 150°C, θ
JA
= 100°C/W
N PACKAGE 8-LEAD PDIP
J PACKAGE 8-LEAD CERDIP
ELECTRICAL CHARACTERISTICS
LT11O1AM/AI/AC LT1101M/I/C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
G
E
Gain Error G = 100, V
0
= 0.1V to 3.5V, R
L
= 50k 0.010 0.050 0.011 0.075 %
G = 10, V
0
= 0.1V to 3.5V, R
L
= 50k 0009 0.040 0.010 0.060 %
G
NL
Gain Nonlinearity G = 100, R
L
= 50k 20 60 20 75 ppm
G = 10, R
L
= 50k (Note 2) 3 7 3 8 ppm
V
OS
Input Offset Voltage 50 160 60 220 µV
LT1101SW 250 600 µV
l
OS
Input Offset Current 0.13 0.60 0.15 0.90 nA
I
B
Input Bias Current 6 8 6 10 nA
I
S
Supply Current 75 105 78 120 µA
VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, G = 10 or 100, TA = 25°C, unless
otherwise noted. (Note 4)
3
LT1101
1101fa
LT1101AM/AI/AC LT1101M/I/C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
G
E
Gain Error G = 100, V
O
= ±10V, R
L
= 50k 0.008 0.040 0.009 0.060 %
G = 100, V
O
= ±10V, R
L
= 2k 0.011 0.055 0.012 0.070 %
G = 100, V
O
= ±10V, R
L
= 50k or 2k 0.008 0.040 0.009 0.060 %
G
NL
Gain Nonlinearity G = 100, R
L
= 50k 7 16 8 20 ppm
G = 100, R
L
= 2k 24 45 25 60 ppm
G = 10, R
L
= 50k or 2k 3 8 3 9 ppm
V
OS
Input Offset Voltage 50 160 60 220 µV
LT1101SW 250 600 µV
l
OS
Input Offset Current 0.13 0.60 0.15 0.90 nA
I
B
Input Bias Current 6 8 6 10 nA
Input Resistance
Common Mode (Note 2) 4 7 3 7 GΩ
Differential Mode (Note 2) 7 12 5 12 GΩ
e
n
Input Noise Voltage 0.1Hz to 10Hz (Note 3) 0.9 1.8 0.9 µVp-p
Input Noise Voltage f
O
= 10Hz (Note 3) 45 64 45 nV/√Hz
Density f
O
= 1000Hz (Note 3) 43 54 43 nV/√Hz
i
n
Input Noise Current 0.1Hz to 10Hz (Note 3) 2.3 4.0 2.3 pAp-p
Input Noise Current f
O
=10Hz (Note 3) 0.06 0.10 0.06 pA/√Hz
Density f
O
= 1000Hz 0.02 0.02 pA/√Hz
lnput Voltage Range G = 100 13.0 13.8 13.0 13.8 V
–14.4 –14.7 –14.4 – 14.7 V
G = 10 11.5 12.5 11.5 12.5 V
–13.0 – 13.3 – 13.0 –13.3 V
CMRR Common Mode 1k Source Imbalance
Rejection Ratio G = 100, Over CM Range 100 112 98 112 dB
G = 10, Over CM Range 84 100 82 99 dB
PSRR Power Supply V
S
= +2.2V, –0.1V to ±18V 102 114 100 114 dB
Rejection Ratio
I
S
Supply Current 92 130 94 150 µA
ELECTRICAL CHARACTERISTICS
LT11O1AM/AI/AC LT1101M/I/C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
CMRR Common Mode 1k Source Imbalance
Rejection Ratio G = 100, V
CM
= 0.07V to 3.4V 95 106 92 105 dB
G = 10, V
CM
= 0.07V to 3.1V 84 100 82 99 dB
Minimum Supply Voltage (Note 5) 1.8 2.3 1.8 2.3 V
V
O
Maximum 0utput Output High, 50k to GND 4.1 4.3 4.1 4.3 V
Voltage Swing Output High, 2k to GND 3.5 3.9 3.5 3.9 V
Output Low, V
REF
= 0, No Load 3.3 6 3.3 6 mV
Output Low, V
REF
= 0, 2k to GND 0.5 1 0.5 1 mV
Output Low, V
REF
= 0, l
SINK
= 100µA90130 90 130 mV
BW Bandwidth G = 100 (Note 2) 2.0 3.0 2.0 3.0 kHz
G = 10 (Note 2) 22 33 22 33 kHz
SR Slew Rate (Note 2) 0.04 0.07 0.04 0.07 V/µs
VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, G = 10 or 100, TA = 25°C, unless
otherwise noted. (Note 4)
VS = ±15V, VCM = 0V, TA = 25°C, Gain = 10 or 100, unless otherwise noted.
4
LT1101
1101fa
ELECTRICAL CHARACTERISTICS
LT1101AM/AI LT1101M/I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
O
Maximum 0utput R
L
= 50k 13.0 14.2 13.0 14.2 V
Voltage Swing R
L
= 2k 11.0 13.2 11.0 13.2 V
BW Bandwidth G = 100 (Note 2) 2.3 3.5 2.3 3.5 kHz
G = 10 (Note 2) 25 37 25 37 kHz
SR Slew Rate 0.06 0.10 0.06 0.10 V/µs
VS = ±15V, VCM = 0V, TA = 25°C, Gain = 10 or 100, unless otherwise noted.
LT1101AM/AI LT1101M/I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
G
E
Gain Error G = 100, V
O
= ±10V, R
L
= 50k 0.024 0.070 0.026 0.100 %
G = 100, V
O
= ±10V, R
L
= 5k 0.030 0.100 0.035 0.130 %
G = 10, V
O
= ±10V, R
L
= 50k or 5k 0.015 0.070 0.018 0.100 %
TCG
E
Gain Error Drift G = 100, R
L
= 50k 2 4 2 5 ppm/°C
(Note 2) G = 100, R
L
= 5k 2 7 2 8 ppm/°C
G = 10, R
L
= 50k or 5k 1 4 1 5 ppm/°C
G
NL
Gain Nonlinearity G = 100, R
L
= 50k 24 70 26 90 ppm
G = 100, R
L
= 5k 70 300 75 500 ppm
G = 10, R
L
= 50k 4 13 5 15 ppm
G = 10, R
L
= 5k 10 40 12 60 ppm
V
OS
Input Offset Voltage 90 350 110 500 µV
LT1101ISW 110 950 µV
∆V
OS
/∆TInput Offset Voltage Drift (Note 2) 0.4 2.0 0.5 2.8 µV/°C
LT1101ISW 0.5 4.8 mV/°C
l
OS
Input Offset Current 0.16 0.80 0.19 1.30 nA
∆l
OS
/∆TInput Offset Current Drift (Note 2) 0.5 4.0 0.8 7.0 pA/°C
I
B
Input Bias Current 7 10 7 12 nA
∆I
B
/∆TInput Bias Current Drift (Note 2) 10 25 10 30 pA/°C
CMRR Common Mode G = 100, V
CM
= –14.4V to 13V 96 111 94 111 dB
Rejection Ratio G = 100, V
CM
= –13V to 11.5V 80 99 78 98 dB
PSRR Power Supply V
S
= 3.0, –0.1V to ±18V 98 110 94 110 dB
Rejection Ratio
I
S
Supply Current 105 165 108 190 µA
V
O
Maximum 0utput R
L
= 50k 12.5 14.0 12.5 14.0 V
Voltage Swing R
L
= 5k 11.0 13.5 11.0 13.5 V
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.
5
LT1101
1101fa
ELECTRICAL CHARACTERISTICS
VS = ±15V, VCM = 0V, Gain = 10 or 100, 0°C ≤ TA ≤ 70°C, unless
otherwise noted.
LT1101AC LT1101C/S
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
G
E
Gain Error G = 100, V
O
= ±10V, R
L
= 50k 0.012 0.055 0.014 0.080 %
G = 100, V
O
= ±10V, R
L
= 2k 0.018 0.085 0.020 0.100 %
G = 10, V
O
= ±10V, R
L
= 50k or 2k 0.009 0.055 0.010 0.080 %
TCG
E
Gain Error Drift G = 100, R
L
= 50k 1 4 1 5 ppm/°C
(Note 2) G = 100, R
L
= 2k 2 7 2 9 ppm/°C
G = 10, R
L
= 50k or 5k 1 4 1 5 ppm/°C
G
NL
Gain Nonlinearity G = 100, R
L
= 50k 9 25 10 35 ppm
G = 100, R
L
= 2k 33 75 36 100 ppm
G = 10, R
L
= 50k or 2k 4 10 4 11 ppm
V
OS
Input Offset Voltage 70 250 85 350 µV
LT1101SW 300 800 µV
∆V
OS
/∆TInput Offset Voltage Drift (Note 2) 0.4 2.0 0.5 2.8 µV/°C
LT1101SW 1.2 4.5 µV/°C
l
OS
Input Offset Current 0.14 0.70 0.17 1.10 nA
∆I
OS
/∆TInput Offset Current Drift (Note 2) 0.5 4.0 0.8 7.0 pA/°C
I
B
Input Bias Current 6 9 6 11 nA
∆I
B
/∆TInput Bias Current Drift (Note 2) 10 25 10 30 pA/°C
CMRR Common Mode G = 100, V
CM
= –14.4V to 13V 98 112 96 112 dB
Rejection Ratio G = 100, V
CM
= –13V to 11.5V 82 100 80 99 dB
PSRR Power Supply V
S
= 2.5, –0.1V to ±18V 100 112 97 112 dB
Rejection Ratio
I
S
Supply Current 98 148 100 170 µA
V
O
Maximum 0utput R
L
= 50k ±12.5 ±14.1 ±12.5 ±14.1 V
Voltage Swing R
L
= 2k ±10.5 ±13.0 ±10.5 ±13.0 V
6
LT1101
1101fa
LT1101AM/AI LT1101M/I
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
G
E
Gain Error G = 100, V
0
= 0.1V to 3.5V, R
L
= 50k 0.026 0.080 0.028 0.120 %
G = 10, V
CM
= 0.15, R
L
= 50k 0.011 0.070 0.014 0.100 %
TCG
E
Gain Error Drift R
L
= 50k (Note 2) 1 4 1 5 ppm/°C
G
NL
Gain Nonlinearity G = 100, R
L
= 50k 45 110 48 140 ppm
G = 10, R
L
= 50k (Note 2) 4 13 5 15 ppm
V
OS
Input Offset Voltage 90 350 110 500 µV
LT1101ISW 110 950 µV
∆V
OS
/∆TInput Offset Voltage Drift (Note 2) 0.4 2.0 0.5 2.8 µV/°C
LT1101ISW 0.5 4.8 µV/°C
l
OS
Input Offset Current 0.16 0.80 0.19 1.30 nA
∆V
OS
/∆TInput Offset Current Drift (Note 2) 0.5 4.0 0.8 7.0 pA/°C
I
B
Input Bias Current 7 10 7 12 nA
∆I
B
/∆TInput Bias Current Drift (Note 2) 10 25 10 30 pA/°C
CMRR Common Mode G = 100, V
CM
= 0.1V to 3.2V 91 105 88 104 dB
Rejection Ratio G = 10, V
CM
= 0.1V to 2.9V, V
REF
= 0.15V 80 98 77 97 dB
I
S
Supply Current 88 135 92 160 µA
V
0
Maximum 0utput Output High, 50k to GND 3.8 4.1 3.8 4.1 V
Voltage Swing Output High, 2k to GND 3.0 3.7 3.0 3.7 V
Output Low, V
REF
= 0, No Load 4.5 8 4.5 8 mV
Output Low, V
REF
= 0, 2k to GND 0.7 1.5 0.7 1.5 mV
Output Low, V
REF
= 0, I
SINK
= 100µA125 170 125 170 mV
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).
ELECTRICAL CHARACTERISTICS
7
LT1101
1101fa
LT1101AC LT1101C/S
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
G
E
Gain Error G = 100, V
O
= 0.1V to 3.5V, R
L
= 50k 0.017 0.065 0.018 0.095 %
G = 10, V
CM
= 0.15V, R
L
= 50k 0.010 0.060 0.012 0.080 %
TCG
E
Gain Error Drift R
L
= 50k (Note 2) 1 4 1 5 ppm/°C
G
NL
Gain Nonlinearity G = 100, R
L
= 50k 25 80 25 100 ppm
G = 10, R
L
= 50k (Note 2) 4 10 4 11 ppm
V
OS
Input Offset Voltage 70 250 85 350 µV
LT1101SW 300 800 µV
∆V
OS
/∆TInput Offset Voltage Drift (Note 2) 0.4 2.0 0.5 2.8 µV/°C
LT1101SW 1.2 4.5 µV/°C
l
OS
Input Offset Current 0.14 0.70 0.17 1.10 nA
∆I
OS
/∆TInput Offset Current Drift (Note 2) 0.5 4.0 0.8 7 pA/°C
I
B
Input Bias Current 6 9 6 11 nA
∆I
B
/∆TInput Bias Current Drift (Note 2) 10 25 10 30 pA/°C
CMRR Common Mode G = 100, V
CM
= 0.07V to 3.3V 93 105 90 104 dB
Rejection Ratio G = 10, V
CM
= 0.07V to 3V, V
REF
= 0.15V 82 99 80 98 dB
I
S
Supply Current 80 120 85 145 µA
V
O
Maximum 0utput Output High, 50k to GND 4.0 4.2 4.0 4.2 V
Voltage Swing Output High, 2k to GND 3.3 3.8 3.3 3.8 V
Output Low, V
REF
= 0, No Load 4 7 4 7 mV
Output Low, V
REF
= 0, 2k to GND 0.6 1.2 0.6 1.2 mV
Output Low, V
REF
= 0, I
SINK
= 100µA100 150 100 150 mV
VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, Gain = 10 or 100,
0°C ≤ TA ≤ 70°C, unless otherwise noted (Note 4).
ELECTRICAL CHARACTERISTICS
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.
Note 4: These test conditions are equivalent to V
S
= 4.9V, – 0.1V,
V
CM
= 0V, V
REF(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.
8
LT1101
1101fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Gain = 100 Nonlinearity
Distribution
GAIN NONLINEARITY (PPM)
0
0
PERCENT OF UNITS
5
15
20
25
4810 18
10
26 12 14 16
30
LT1101 • TPC01
V
S
= ± 15V
T
A
= 25°C
R
L
≥ 50kΩ
708 UNITS
TESTED IN
ALL PACKAGES
Gain = 10 Nonlinearity
Distribution
GAIN NONLINEARITY (PPM)
0
PERCENT OF UNITS
30
40
50
8
20
10
024610
LT1101 • TPC02
V
S
= ± 15V
T
A
= 25°C
R
L
≥ 2kΩ
708 UNITS
TESTED IN
ALL PACKAGES
LT1101 • TPC03
FREQUENCY (Hz)
–0.5
GAIN ERROR (%)
GAIN (dB)
0
–1.0
0
10 1k 10k 1M
40
30
20
10
–1.0
100 100k
–0.5
–1.5
–1.5
V
S
= ± 15V
T
A
= 25°C
G = 100
G = 10
Gain vs Frequency
Gain Error Over Temperature
INPUT OFFSET VOLTAGE (µV)
–200
0
0
PERCENT OF UNITS
10
20
100
–100 200
30
LT1101 • TPC06
T
A
= 25°C
746 UNITS MEASURED IN ALL PACKAGES
EACH UNIT MEASURED AT V
S
= 15V,
0V AND AT V
S
= ±15V
Input Offset Voltage DistributionGain Nonlinearity Temperature
Input Bias and Offset Currents vs
Temperature
TEMPERATURE (°C)
–50
–7
OFFSET CURRENT (pA)BIAS CURRENT (nA)
–5
200
050 75
–6
150
100
–25 25 100 125
LT1101 • TPC08
VS = 5V, 0V TO ±15V
IOS
IB
Supply Current vs Temperature
TEMPERATURE (°C)
–50
SUPPLY CURRENT (µA)
90
100
110
25 75
80
70
–25 0 50 100 125
60
50
LT1101 • TPC07
V
S
= 5V, 0V
V
S
= ±15V
COMMON MODE VOLTAGE (V)
–1
–12
INPUT BIAS CURRENT (nA)
–10
–8
–6
–4
–2
0
01234
LT1101 • TPC09
TA = –55°C
TA = 125°C
VS = 5V, 0V
TA = 25°C
Input Bias Current vs
Common Mode Voltage
VOLTAGE
1
6
5
TEMPERATURE (°C)
–50 –25
0
GAIN ERROR (%)
0.02
0.05
050 75
0.01
0.04
0.03
25 100 125
LT1101 • TPC04
2
1
3
6
5
7
4
4
7
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
G = 100, VS = ± 15V, RL = 50k
G = 10, VS = ± 15V, RL = 5k
G = 10, VS = ± 15V or 5V, 0V,
RL = 50k
3
2
SEE GAIN VS T
FOR DEFINITIONS
TEMPERATURE (°C)
–50
GAIN NONLINEARITY (PPM)
40
50
60
25 75
30
20
–25 0 50 100 125
10
0
LT1101 • TPC05
2
1
6
5
4
7
3
9
LT1101
1101fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Common Mode Range vs Supply
Voltage
Power Supply Rejection Ratio vs
Frequency
LT1101 • TPC12
FREQUENCY (Hz)
40
POWER SUPPLY REJECTION RATIO (dB)
80
120
20
60
100
10 1k 10k 100k
0
100
T
A
= 25°C
NEGATIVE
SUPPLY
POSITIVE
SUPPLY
Common Mode Rejection Ratio vs
Frequency
Short-Circuit Current vs Time
Output Voltage Swing vs Load
Current
LT1101 • TPC14
SOURCING OR SINKING LOAD CURRENT (mA)
0.01
OUTPUT VOLTAGE SWING (V)
0.1 1 10
V–
V– 1
V+ –2
V+ –1
V– 2
V+
125°C
–55°C
–55°C
125°C25°C
25°C
Output Saturation vs Temperature
vs Sink Current
LT1101 • TPC13
TEMPERATURE (°C)
–50 –25
SATURATION VOLTAGE (mV)
10
100
1000
0255075100 125
1
I
SINK
= 2mA
I
SINK
= 1mA
I
SINK
= 100µA
I
SINK
= 10µA
I
SINK
= 1µA
NO LOAD
V
S
= 5V, 0V
R
L
= 5k TO GROUND
Undistorted Output Swing vs
Frequency Output Impedance vs Frequency
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
10
100
1k
1
0.1
10 100 10k 100k
1k
LT1101 • TPC18
G = 100
G = 10
LT1101 • TPC16
CAPACITIVE LOAD (nF)
0.1
0
OVERSHOOT (%)
80
100
120
110100
60
40
20
VS = ± 2.0V TO
± 15V
TA = 25°C
G = 100
G = 10
Capacitive Load Handling
FREQUENCY (Hz)
0.1
0
COMMON MODE REJECTION RATIO (dB)
20
40
60
80
120
110 100 1k 10k 100k
100
LT1101 • TPC10
VS = ± 15V
TA = 25°C
G = 10
G = 100
C = 82pF PIN 1 TO PIN 2
G = 100
SUPPLY VOLTAGE (V)
0
V–
COMMON MODE RANGE (V)
V– 1
V+ –3
V+ –2
V+ –1
±4±8±10 ±18
V– 2
±2±6±12 ±14 ±16
V+
LT1101 • TPC11
G = 100
G = 10
25°C
125°C
–55°C
125°C
–55°C
25°C
G = 100
G = 10
ALL
TEMPERATURES
TIME FROM OUTPUT SHORT TO GROUND (MINUTES)
0
SINKING SOURCING
SHORT-CIRCUIT CURRENT (mA)
–10
0
10
–20
–30
–40 12
20
30
40
3
LT1101 • TPC15
T
A
= 125°C, V
S
= 5V, 0V
T
A
= 25°C, V
S
= ± 15V
T
A
= 5°C, V
S
= ± 15V
T
A
= 125°C, V
S
= ± 15V
T
A
= 125°C, V
S
= ± 15V
T
A
= 25°C, V
S
= 5V, 0V
LT1101 • TPC17
FREQUENCY (Hz)
100
PEAK-TO-PEAK OUTPUT SWING, VS = ± 15V (V)
PEAK-TO-PEAK OUTPUT SWING, VS = 5V, 0V (V)
1k 10k 100
0
20
10
30
5
4
3
2
1
0
VS = 5V, 0V,
RL ≥ 1k
VS = 5V, 0V, RL ≥ 100k
VS = ±15V
RL ≥ 30k
VS = ±15V
RL ≥ 100k
TA = 25°C
LOAD, RL, TO GROUND
10
LT1101
1101fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Warm-Up DriftNoise Spectrum
Large Signal Transient Response
G = 10, VS = 5V, 0V
FREQUENCY (Hz)
0.1
10
VOLTAGE NOISE DENSITY (nV/√Hz)
VOLTAGE NOISE DENSITY (fA/√Hz)
100
1000
300
30
10 10001001
LT1101 • TPC19
CURRENT
NOISE
VOLTAGE
NOISE
V
S
= ± 2.5V TO ± 15V
T
A
= 25°C
1/f CORNER
0.6Hz
TIME AFTER POWER ON (MINUTES)
0
CHANGE IN OFFSET VOLTAGE (µV)
0.4
0.2
12
0
0.8
0.6
3
LT1101 • TPC20
VS = ± 15V
TA = 25°C
WARM UP DRIFT
AT VS = 5V, 0V IS
IMMEASURABLY LOW
1V/DIV
50µs/DIV
OUTPUT FROM 0V TO 4.5V, NO LOAD
Large Signal Transient Response
G = 10, VS = 15V
5V/DIV
200µs/DIV
NO LOAD
Large Signal Transient Response
G = 100, VS = ±15V
5V/DIV
200µs/DIV
NO LOAD
Large Signal Transient Response
G = 100, VS = 5V, 0V
1V/DIV
100µs/DIV
OUTPUT FROM 0V TO 4.5V, NO LOAD
Small Signal Transient Response
G = 10, VS = 5V, 0V
20mV/DIV
20µs/DIV
OUTPUT FROM 0.05V TO 0.15V, NO LOAD
Small Signal Transient Response
G = 10, VS = ±15V
20mV/DIV
20µs/DIV
Small Signal Transient Response
G = 100, VS = 5V, 0V
20V/DIV
200µs/DIV
OUTPUT FROM 0.05V TO 0.15V, NO LOAD
(RESPONSE WITH V
S
= ±15V, G = 100 IS IDENTICAL)
LT1101 • TPC20.1
LT1101 • TPC20.4
LT1101 • TPC20.2 LT1101 • TPC20.3
LT1101 • TPC20.5
LT1101 • TPC20.6
LT1101 • TPC20.7
11
LT1101
1101fa
Single Supply: Minimum Output
Voltage vs Common Mode
Voltage
Single Supply: Minimum
Common Mode Voltage vs
Output Voltage
Minimum Supply Voltage vs
Temperature
TYPICAL PERFOR A CE CHARACTERISTICS
UW
APPLICATIO S I FOR ATIO
WUUU
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 instrumenta-
tion 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 Fre-
quency 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 configura-
tion, 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 applica-
tions, 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.
OUTPUT VOLTAGE (V)
0
0
MINIMUM COMMON MODE VOLTAGE (V)
20
40
60
80
120
2468
10 12
100
LT1101 • TPC21
G = 10
G = 100 V+ = 1.8V TO 15V
V– = OV
–55°C
–55°C
125°C
125°C
25°C
25°C
LT1101 • TPC22
MINIMUM OUTPUT VOLTAGE (mV)
0
COMMON MODE VOLTAGE (V)
6
8
10
9
7
5
3
80
4
2
1
02010 4030 60 70 90
50 100
G = 10
G = 100
125°C
125°C
25°C
–55°C
–55°C
V+ = 1.8V TO 15V
V– = OV
NO LOAD 25°C
TEMPERATURE (°C)
–50
0
MINIMUM SUPPLY, OUTPUT SWING,
COMMON MODE RANGE (V)
1.0
2.5
050 75
LT1101 • TPC23
0.5
2.0
1.5
–25 25 100 125
COMMON-MODE RANGE
AT MINIMUM SUPPLY
MINIMUM
SUPPLY VOLTAGE
V
–
= 0V
OUTPUT SWING
AT MINIMUM SUPPLY
12
LT1101
1101fa
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 worst-
case offset voltage. The total current through the resistor
network can exceed 1mA, and the micropower advantage
of the LT1101 is lost.
APPLICATIO S I FOR ATIO
WUUU
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.
LT1101 • AI01
15V
10k
10k
20k
OUTLT1101
10k
– 15V
3
6
5
8
1
R
4
+
–
+
–
LT1101 • AI02
OUT
LT1101
1.2V TO 18V
–1.2V TO –18V
100k 3.3k
5k POT
3
3
6
6
7
8
8
1
4
4
2
5
1
–
+
LT1077
Gains Between 10 and 100
Gains between 10 and 100 can be achieved by connecting
two equal resistors (= R
x
) between Pins 1 and 2 and
Pins 7 and 8.
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
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.
500Ω resistors in series with the inputs protect the LT1101
when the inputs are pulled as much as 10V below the
negative supply.
Gain = 10 + R
x
R+R
x
/90
13
LT1101
1101fa
APPLICATIO S I FOR ATIO
WUUU
LT1101 • AI04
75k
OUTPUT
I
LOOP
5k
5
6
3
1
2
4
8
7
18k
390k
12V
62.5Ω
LT1004-1.2
4mA TO 20mA IN – OV TO 10V OUT
TRIM OUTPUT TO 5V AT 12mA IN
–
+
LT1101
LT1101 • AI05
5
6
3
1
2
4
8
2k
7
V+ = 15V
V– = –15V
OUT
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
LT1101
–
+
LT1010
–
+
LT1101 • AI06
5
6
31R
R
100V
IN
–1.5V
I
OUT
=
I
OUT
R
L
V
IN
4
8
9V
LT1101
I
OUT
= 0mA TO 5mA
VOLTAGE COMPLIANCE = 6.4V
(R ≤ 200Ω)
Micropower, Battery Operated Remote Temperature Sensor 4mA to 20mA Loop Receiver
Instrumentation Amplifier with ±150mA Output Current Voltage Controlled Current Source
LT1101 • AI03
+
–
LT1101
G = 10
REMOTE TEMP
SENSOR
75k
100nA
°K
20k
62Ω
2210Ω
10k
75k
3V
2k
POT
6
35
1
2
4
7
8
LM134-3
OUT
10mV/°C
TRIM OUTPUT TO 250mV AT 25°C
TEMPERATURE RANGE = 2.5°C TO 150°C
ACCURACY = ±0.5°C
LT1004-1.2
14
LT1101
1101fa
APPLICATIO S I FOR ATIO
WUUU
–
+
LT1101 • AI07
5
6
34
R
SHIELD
MINIMUM VOLTAGE ACROSS BRIDGE = 20mV
MINIMUM SUPPLY VOLTAGE = 1.8V
RR
R
RESISTANCE
BRIDGE
TRANSDUCER
OR SENSOR
1
8
V+
OUT
LT1101
G = 100
Differential Voltage Amplification from a Resistance Bridge
Gain = 20, 110 or 200 Instrumentation Amplifier
Differential Output Single Ended Output
LT1101 • AI08
8
6
3
8
1
6
3
OUT
–
+
IN
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
–
+
LT1101
8
1
6
3
8
1
6
3–
+
LT1101
–
+
IN
–
+
OUT
–
+
LT1101
1
15
LT1101
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
PACKAGE DESCRIPTIO
H Package
8-Lead TO-5 Metal Can (.200 Inch PCD)
(Reference LTC DWG # 05-08-1320)
.050
(1.270)
MAX
.016 – .021**
(0.406 – 0.533)
.010 – .045*
(0.254 – 1.143)
SEATING
PLANE
.040
(1.016)
MAX .165 – .185
(4.191 – 4.699)
GAUGE
PLANE
REFERENCE
PLANE
.500 – .750
(12.700 – 19.050)
.305 – .335
(7.747 – 8.509)
.335 – .370
(8.509 – 9.398)
DIA
.200
(5.080)
TYP
.027 – .045
(0.686 – 1.143)
.028 – .034
(0.711 – 0.864)
.110 – .160
(2.794 – 4.064)
INSULATING
STANDOFF
45°TYP
H8(TO-5) 0.200 PCD 0801
LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND THE SEATING PLANE
FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS .016 – .024
(0.406 – 0.610)
*
**
PIN 1
OBSOLETE PACKAGES
J8 0801
.014 – .026
(0.360 – 0.660)
.200
(5.080)
MAX
.015 – .060
(0.381 – 1.524)
.125
3.175
MIN
.100
(2.54)
BSC
.300 BSC
(7.62 BSC)
.008 – .018
(0.203 – 0.457) 0° – 15°
.005
(0.127)
MIN
.405
(10.287)
MAX
.220 – .310
(5.588 – 7.874)
1234
87
65
.025
(0.635)
RAD TYP
.045 – .068
(1.143 – 1.650)
FULL LEAD
OPTION
.023 – .045
(0.584 – 1.143)
HALF LEAD
OPTION
CORNER LEADS OPTION
(4 PLCS)
.045 – .065
(1.143 – 1.651)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
J8 Package
8-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
16
LT1101
1101fa
U
PACKAGE DESCRIPTIO
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LW/TP 1002 1K REV A • PRINTED IN USA
LINEAR TE CHNO LOGY COR P O R ATIO N 1989
SW Package
16-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
S16 (WIDE) 0502
NOTE 3
.398 – .413
(10.109 – 10.490)
NOTE 4
16 15 14 13 12 11 10 9
1
N
2345678
N/2
.394 – .419
(10.007 – 10.643)
.037 – .045
(0.940 – 1.143)
.004 – .012
(0.102 – 0.305)
.093 – .104
(2.362 – 2.642)
.050
(1.270)
BSC .014 – .019
(0.356 – 0.482)
TYP
0° – 8° TYP
NOTE 3
.009 – .013
(0.229 – 0.330)
.005
(0.127)
RAD MIN
.016 – .050
(0.406 – 1.270)
.291 – .299
(7.391 – 7.595)
NOTE 4
× 45°
.010 – .029
(0.254 – 0.737)
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
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)
.420
MIN
.325 ±.005
RECOMMENDED SOLDER PAD LAYOUT
.045 ±.005
N
123 N/2
.050 BSC
.030 ±.005
TYP
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
N8 0502
.100
(2.54)
BSC
.065
(1.651)
TYP
.045 – .065
(1.143 – 1.651)
.130 ± .005
(3.302 ± 0.127)
.020
(0.508)
MIN
.018 ± .003
(0.457 ± 0.076)
.125
(3.175)
MIN
12 34
87 65
.255 ± .015*
(6.477 ± 0.381)
.400*
(10.160)
MAX
.009 – .015
(0.229 – 0.381)
.300 – .325
(7.620 – 8.255)
.325 +.035
–.015
+0.889
–0.381
8.255
()
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)
