LT1101 - Precision, Micropower, Single Supply Instrumentation ...

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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,.
LT1101 Precision, Micropower, Single Supply Instrumentation Amplifier (Fixed Gain = 10 or 100) DESCRIPTIO

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FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■

■ ■ ■

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 ■



■ ■ ■

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)

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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 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

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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

2

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

3

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

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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

(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

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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 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

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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

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

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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

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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

+

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

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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

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

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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

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



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 LINEAR TECHNOLOGY CORPORATION 1989