Rainbow-electronics MAX1386 Bedienungsanleitung PDF herunterladen (Seite 46)

MAX1385/MAX1386

Dual RF LDMOS Bias Controllers

with I

C/SPI Interface

46 ______________________________________________________________________________________

3) Write to the Fine DAC1/DAC2 Write-Through Input

FINETHRU2). If the coarse DAC1/DAC2 low wiper is

higher than the coarse DAC1/DAC2 high wiper,

invert the fine DAC1/DAC input register code.

The resulting output when the high wiper is higher than

the low wiper is shown below:

where FINECODE is the value written to the Fine

DAC1/DAC2 Input register, and LOWCODE is the value

FINECODE

LOWCODE

DACREF DACREF

18 8

×+×

USER WRITES TO THE ANALOG-TO-DIGITAL

CONVERSION REGISTER TO SET UP CONVERSION

SCAN OF ADCIN2, EXTERNAL TEMPERATURE

SENSOR2, AND PGAOUT2

ADCIN2 CONVERSION

RESULT STORED IN FIFO

EXTERNAL TEMPERATURE

SENSOR 2

CONVERSION RESULT

STORED IN FIFO

PGAOUT2

CONVERSION RESULT

STORED IN FIFO

END OF SCAN, REF

AND TEMP SENSOR

POWER DOWN

AUTOMATICALLY

2.0µs ACQUISITION FOR ADCIN1

5.5µs CONVERSION TIME FOR ADCIN1

IDLE, BUT REF

AND TEMP

SENSOR STAY

POWERED UP

TEMP CONVERSION

IN ~40µs

TEMP SENSOR POWERS UP

AND ACQUIRES IN ~6.7µs

INT REFERENCE POWERS

UP IN ~60µs

CNVST

INTERNAL

BUSY

APUINT

CNV11

ACQ11

5.5µs CONVERSION TIME FOR ADCIN2

2µs ACQUISITION OF ADCIN2

IDLE, BUT

REF STAYS

POWERED UP

Figure 24. ADC Clock Mode 11, Example 2

CNVST

USER WRITES TO THE ANALOG-TO-DIGITAL CONVERSION REGISTER

TO SET UP CONVERSION SCAN OF INTERNAL

TEMPERATURE, PGAOUT1, AND ADCIN1

INTERNAL

BUSY

INT REFERENCE POWERS

UP IN ~60µs

TEMP SENSOR POWERS UP

AND ACQUIRES IN ~6.7µs

TEMP CONVERSION

IN ~40µs

IDLE, BUT REF

AND TEMP

SENSOR STAY

POWERED UP

IDLE, BUT REF

AND TEMP

SENSOR STAY

POWERED UP

47µs ACQUISITION FOR

PGAOUT1

5.5µs CONVERSION TIME

FOR PGAOUT1

2µs ACQUISITION FOR

ADCIN1

5.5µs CONVERSION TIME

FOR ADCIN1

END OF SCAN, REF

AND TEMP SENSOR

POWER DOWN

AUTOMATICALLY

ACQ11

INTERNAL TEMPERATURE

CONVERSION RESULT IS

STORED IN FIFO

PGAOUT1

CONVERSION RESULT

STORED IN FIFO

ADCIN1

CONVERSION RESULT

STORED IN FIFO

CNV11

Figure 23. ADC Clock Mode 11, Example 1

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 52

MAX1385/MAX1386 1
C/SPI Interface 1

Kommentare zu diesen Handbüchern

Keine Kommentare

Rainbow-electronics MAX1386 Bedienungsanleitung Seite 46

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Software Rainbow-electronics MAX1386