LTC1540CS8 datasheet(4/12 Pages) LINER

Part #	LTC1540CS8

Description	Nanopower Comparator with Reference

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Manufacturer	LINER [Linear Technology]

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LTC1540

sn1540 1540fas

TYPICAL PERFORMANCE CHARACTERISTICS

TEMPERATURE (°C)

–60

0

0.2

0.5

–20

20

40

1540 G01

0.1

0.4

0.3

–40

0

60

80

100

V + = 5V

V – = GND = 0V

V + = 2V

V – = GND = 0V

V + = 3V

V – = GND = 0V

Supply Current vs Temperature

Reference Voltage

Load Regulation (Source)

OUTPUT SOURCE CURRENT (mA)

0

2

5

1

2

1540 G04

1

4

3

4

V + = 5V

V – = GND = 0V

TA = 25°C

Comparator Short-Circuit Current

vs Supply Voltage

SUPPLY VOLTAGE (V)

0

120

160

200

8

1540 G07

80

40

100

140

180

60

20

0

2

4

6

19

3

5

7

10

TA = 25°C

OUTPUT

CONNECTED TO

V – = GND = 0V;

SOURCE

CURRENT

OUTPUT

CONNECTED

TO V +; SINK

CURRENT

VREF – VHYST (mV)

0

80

60

40

20

0

–20

–40

–60

–80

40

1540 G09

10

20

30

50

Hysteresis Control

Comparator Output Voltage (Low)

vs Load Current

LOAD CURRENT (mA)

0

1.0

2.5

20

40

1540 G06

0.5

2.0

1.5

60

80

10

30

50

70

TA = 25°C

V+ = 5V

V+ = 3V

V+ = 2V

Reference Voltage

Load Regulation (Sink)

OUTPUT SINK CURRENT (µA)

0

1

3

4

5

10

7

10

20

25

1540 G03

2

8

9

6

515

30

35

40

V + = 5V

V – = GND = 0V

TA = 25°C

TEMPERATURE (°C)

–60

1.182

1.184

1.186

80

100

1540 G02

1.180

1.178

1.172

–40

020

–20

40

60

1.174

1.176

1.190

1.188

V + = 5V

V – = GND = 0V

Reference Voltage vs Temperature

Comparator Output Voltage (High)

vs Load Current

LOAD CURRENT (mA)

0

2

5

20

40

1540 G05

1

4

3

60

80

10

30

50

70

TA = 25°C

V+ = 5V

V+ = 3V

V+ = 2V

Comparator Response Time

vs Input Overdrive

INPUT VOLTAGE (mV)

60

70

80

1540 G08

50

40

55

65

75

45

35

30

20

40

60

10

90

30

50

70

100 110

TA = 25°C

V+ = 5V

V – = GND = 0V

tPLH

tPHL

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