Transcript
LT1101 Precision, Micropower, Single Supply Instrumentation Amplifier (Fixed Gain = 10 or 100) DESCRIPTIO
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.
U 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
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LT1101
RATI GS (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
W
Supply Voltage ...................................................... ±22V Differential Input Voltage ....................................... ±36V Input Voltage ............... Equal to Positive Supply Voltage ..........10V Below Negative Supply Voltage Output Short Circuit Duration .......................... Indefinite
U U W 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 1101fa
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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
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) LT1101ISW
(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
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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
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) LT1101SW
(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
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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
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) LT1101ISW
(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
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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
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) LT1101SW
(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.
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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
6 4 8 10 12 14 GAIN NONLINEARITY (PPM)
16
0
18
–1.5 2 6 8 4 GAIN NONLINEARITY (PPM)
0
LT1101 • TPC01
Gain Error Over Temperature
0.02
4 6
0.01
7
5 0 –50 –25
50 25 0 75 TEMPERATURE (°C)
100
60
1 GAIN NONLINEARITY (PPM)
0.03
SEE GAIN VS T FOR DEFINITIONS
50
4
40 30
2
20
7 50 25 75 0 TEMPERATURE (°C)
100
70 60
50 25 75 0 TEMPERATURE (°C)
100
0
125
200
125
LT1101 • TPC07
–200
–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
10
LT1101 • TPC05
OFFSET CURRENT (pA)
VS = 5V, 0V
TA = 25°C 746 UNITS MEASURED IN ALL PACKAGES EACH UNIT MEASURED AT VS = 15V, 0V AND AT VS = ±15V
6
0 –50 –25
BIAS CURRENT (nA)
90
1M
20
Input Bias and Offset Currents vs Temperature
VS = ±15V
100k
5
Supply Current vs Temperature
SUPPLY CURRENT (µA)
30
3
LT1101 • TPC04
100
1k 10k FREQUENCY (Hz)
Input Offset Voltage Distribution
1
10
125
110
100
LT1101 • TPC03
Gain Nonlinearity Temperature
VOLTAGE
GAIN ERROR (%)
0.04
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
10
LT1101 • TPC02
0.05 1 2 3 4 5 6 7
10
PERCENT OF UNITS
2
0
INPUT BIAS CURRENT (nA)
0
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
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LT1101 U W
TYPICAL PERFOR A CE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency
80 60 40
V + –1
25°C V + –3 V– 2 ALL TEMPERATURES
V– 1
VS = ± 15V TA = 25°C 0.1
125°C
V + –2 G = 10
G = 10
G = 100 10 100 1k FREQUENCY (Hz)
1
10k
V–
100k
±2 ±4
OUTPUT VOLTAGE SWING (V)
SATURATION VOLTAGE (mV)
ISINK = 10µA
ISINK = 1µA NO LOAD
V+ –1
0
25
50
75
100
125°C 25°C
V– 1 V– 0.1 1 10 0.01 SOURCING OR SINKING LOAD CURRENT (mA)
125
80 G = 10 60 G = 100 40 20
0.1
1 10 CAPACITIVE LOAD (nF)
100
100k
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
LT1101 • TPC14
PEAK-TO-PEAK OUTPUT SWING, VS = ± 15V (V)
OVERSHOOT (%)
TA = 25°C
1k 10k FREQUENCY (Hz)
30
Undistorted Output Swing vs Frequency
VS = ± 2.0V TO ± 15V
100
Short-Circuit Current vs Time
–55°C
V– 2
Capacitive Load Handling
0
20
LT1101 • TPC12
25°C
LT1101 • TPC13
100
40
10
–55°C
TEMPERATURE (°C)
120
60
±6 ±8 ±10 ±12 ±14 ±16 ±18 SUPPLY VOLTAGE (V)
V+ –2
RL = 5k TO GROUND 1 –50 –25
NEGATIVE SUPPLY
40 125°C
ISINK = 100µA
10
80
V+
ISINK = 1mA
POSITIVE SUPPLY
Output Voltage Swing vs Load Current
ISINK = 2mA
100
100
LT1101 • TPC11
Output Saturation vs Temperature vs Sink Current VS = 5V, 0V
TA = 25°C
0 0
LT1101 • TPC10
1000
– 55°C
SHORT-CIRCUIT CURRENT (mA) SINKING SOURCING
0
125°C 25°C
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
PEAK-TO-PEAK OUTPUT SWING, VS = 5V, 0V (V)
20
– 55°C
POWER SUPPLY REJECTION RATIO (dB)
G = 10
120 G = 100
1k
OUTPUT IMPEDANCE (Ω)
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
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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
1
10 100 FREQUENCY (Hz)
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 0.4
0.2 50µs/DIV OUTPUT FROM 0V TO 4.5V, NO LOAD 0
1000
0
1
2
LT1101 • TPC20
1V/DIV
5V/DIV 200µs/DIV NO LOAD
200µs/DIV NO LOAD
LT1101 • TPC20.2
100µs/DIV OUTPUT FROM 0V TO 4.5V, NO LOAD LT1101 • TPC20.3
LT1101 • TPC20.4
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 • TPC20.5
Large Signal Transient Response G = 100, VS = 5V, 0V
Large Signal Transient Response G = 100, VS = ±15V
Large Signal Transient Response G = 10, VS = 15V
20µs/DIV OUTPUT FROM 0.05V TO 0.15V, NO LOAD
LT1101 • TPC20.1
3
TIME AFTER POWER ON (MINUTES)
LT1101 • TPC19
5V/DIV
1V/DIV
Noise Spectrum
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
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TYPICAL PERFOR A CE CHARACTERISTICS Single Supply: Minimum Common Mode Voltage vs Output Voltage
Single Supply: Minimum Output Voltage vs Common Mode Voltage
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 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, OUTPUT SWING, COMMON MODE RANGE (V)
10
125°C COMMON MODE VOLTAGE (V)
MINIMUM COMMON MODE VOLTAGE (V)
120
Minimum Supply Voltage vs Temperature 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
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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.
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LT1101
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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
+
Gain = 10 +
Rx 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
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LT1101
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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
4
4
–
9V 5 LT1101
2k
7
6
R
–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
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LT1101
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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
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LT1101
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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
.300 BSC (7.62 BSC)
2
3
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
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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
