Rainbow-electronics MAX3107 Manual do Utilizador descarregar pdf (Página 11)

______________________________________________________________________________________ 11

MAX3107

SPI/I

2

C UART with 128-Word FIFOs

and Internal Oscillator

Typical Operating Characteristics

(V

A

= 2.5V, V

L

= 2.5V, V

EXT

= 2.5V, LDOEN = V

L

, T

A

= +25NC, unless otherwise noted.)

GPIO_ OUTPUT LOW VOLTAGE

vs. SINK CURRENT (OPEN DRAIN)

MAX3107 toc09

V

OL

(V)

I

SINK

(mA)

21

5

10

15

20

25

30

35

0

0 3

V

EXT

= 3.3V

V

EXT

= 2.5V

GPIO_ OUTPUT HIGH VOLTAGE

vs. SOURCE CURRENT (PUSH-PULL)

MAX3107 toc08

V

OH

(V)

I

SOURCE

(mA)

3.02.52.01.51.00.5

5

10

15

20

25

30

35

0

0 3.5

V

EXT

= 3.3V

V

EXT

= 2.5V

INTERNAL OSCILLATOR FREQUENCY

DEVIATION vs. V

A

VOLTAGE

MAX3107 toc07

V

A

(V)

INTERNAL OSCILLATOR FREQUENCY DEVIATION (%)

3.353.102.60 2.85

-0.3

-0.2

-0.1

0

0.2

0.1

0.3

0.4

-0.4

2.35 3.60

I

A

SUPPLY CURRENT vs. PLL FREQUENCY

MAX3107 toc06

PLL FREQUENCY (MHz)

I

A

(mA)

2.25

2.50

2.75

3.00

3.25

3.50

3.75

4.00

4.25

4.50

4.75

5.00

5.25

5.50

5.75

2.00

10 100

PLL = x48

PLL = x96

PLL = x144

I

A

SUPPLY CURRENT vs. TEMPERATURE

MAX3107 toc05

TEMPERATURE (°C)

I

A

(µA)

603510-15

20

40

60

80

100

120

140

0

-40 85

EXTERNAL 3.6MHz CLOCK

BAUD RATE = 115kbps

V

A

= 3.3V

V

A

= 2.5V

I

A

SUPPLY CURRENT vs. V

A

VOLTAGE

(EXTERNAL CRYSTAL, PLL ENABLED)

MAX3107 toc04

V

A

(V)

I

A

(mA)

3.353.102.60 2.85

0.925

0.950

0.975

1.000

1.050

1.025

1.075

1.100

0.900

2.35 3.60

3.686MHz EXT. CRYSTAL

BAUD RATE = 115kbps

6x PLL MULT.FACTOR

LDOEN = V

L

LDOEN = AGND

1.8V APPLIED TO V

18

I

A

SUPPLY CURRENT vs. V

A

VOLTAGE

(INTERNAL CLOCK, PLL ENABLED)

MAX3107 toc03

V

A

(V)

I

A

(mA)

3.353.102.852.60

2.7

2.9

3.1

3.3

3.5

3.7

3.9

4.1

4.3

2.5

2.35 3.60

BAUD RATE = 115kbps

6x PLL MULT.FACTOR

LDOEN = V

L

LDOEN = AGND

1.8V APPLIED TO V

18

I

A

SUPPLY CURRENT vs. V

A

VOLTAGE

(EXTERNAL CLOCK, PLL ENABLED)

MAX3107 toc02

V

A

(V)

I

A

(mA)

3.353.102.852.60

2.2

2.4

2.6

2.8

3.0

3.2

3.4

3.6

3.8

2.0

2.35 3.60

EXTERNAL 614kHz CLOCK

BAUD RATE = 115kbps

6x PLL MULT.FACTOR

LDOEN = V

L

LDOEN = AGND

1.8V APPLIED TO V

18

I

A

SUPPLY CURRENT vs. V

A

VOLTAGE

(EXTERNAL CLOCK, PLL DISABLED)

MAX3107 toc01

V

A

(V)

I

A

(µA)

3.353.102.852.60

20

40

60

80

100

120

140

0

2.35 3.60

EXTERNAL 3.6MHz CLOCK

BAUD RATE = 115kbps

LDOEN = V

L

LDOEN = AGND

1.8V APPLIED TO V

18

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 50 51

C UART with 128-Word FIFOs 1

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