C/spi interface – Rainbow Electronics MAX1386 User Manual

Page 7

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MAX1385/MAX1386

Dual RF LDMOS Bias Controllers

with I

2

C/SPI Interface

_______________________________________________________________________________________

7

I

2

C SLOW-/FAST-MODE TIMING CHARACTERISTICS (Note 12, see Figure 1)

(GATEV

DD

= +5.5V for MAX1385, GATEV

DD

= +11V for MAX1386, AV

DD

= +5V, DV

DD

= 2.7V to 5.25V, external V

REFADC

= +2.5V,

external V

REFDAC

= +2.5V, C

REF

= 0.1µF, T

A

= -40°C to +85°C, unless otherwise noted).

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Serial-Clock Frequency

f

SCL

0

400

kHz

Bus Free Time Between STOP
and START Condition

t

BUF

1.3

µs

Hold Time Repeated START
Condition

t

HD;STA

After this period, the first clock pulse is
generated

0.6

µs

SCL Pulse-Width Low

t

LOW

1.3

µs

SCL Pulse-Width High

t

HIGH

0.6

µs

Setup Time Repeated START
Condition

t

SU;STA

0.6

µs

Data Hold Time

t

HD;DAT

(Note 13)

0

0.9

µs

Data Setup Time

t

SU;DAT

100

ns

Rise Time of Both SDA and SCL
Signals, Receiving

t

R

(Note 14)

0

300

ns

Fall Time of Both SDA and SCL
Signals, Receiving

t

F

(Note 14)

0

300

ns

Fall Time of SDA Signal,
Transmitting

t

F

(Notes 14, 15)

20 +

0.1C

b

250

ns

Setup Time for STOP Condition

t

SU;STO

0.6

µs

Capacitive Load for Each Bus
Line

C

b

400

pF

Pulse Width of Spikes
Suppressed by the Input Filter

t

SP

(Note 16)

0

50

ns

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