Rainbow Electronics MAX1386 - Manual (Page 49)

MAX1385/MAX1386
Dual RF LDMOS Bias Controllers
with I 2 C/SPI Interface
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ACTION REQUIRED
RECOMMENDED COMMAND
SEQUENCE
OTHER POSSIBLE COMMAND
SEQUENCES
Update fine DAC_ and trigger
autocalibration.
Write to FINECAL_. Autocalibration
begins after writing to FINECAL_. Write
to LDAC to update fine DAC_.
Write to FINECALTHRU_ to immediately
update fine DAC_.
Update high wiper coarse DAC_ and
trigger autocalibration.
Write to HIWIPE_ with HCAL set to 1.
Autocalibration begins after writing to
LDAC and high wiper coarse DAC_ is
updated thereafter.
None.
Update low wiper coarse DAC_ and trigger
autocalibration.
Write to LOWIPE_ with LCAL set to 1.
Autocalibration begins after writing to
LDAC and low wiper coarse DAC_ is
updated thereafter.
None.
Immediately update fine DAC_ and trigger
autocalibration.
Write to FINECALTHRU_. None.
Immediately update high wiper coarse
DAC_ and trigger autocalibration.
This action is not possible. See the
recommended sequence above
“Update high wiper coarse DAC_ and
trigger autocalibration.”
None.
Immediately update low wiper coarse
DAC_ and trigger autocalibration.
This action is not possible. See the
recommended sequence “Update low
wiper coarse DAC_ and trigger
autocalibration.”
None.
Update the high, low, and fine components
of DAC_.
Write to HIWIPE_ with HCAL set to 1.
Write LOWIPE_ with LCAL set to 1. Write
to LDAC to update high and low wipers
with autocalibrated values. Write to
FINECALTHRU_ to trigger fine DAC_
autocalibration and update DAC_.
HIWIPE_ and LOWIPE_ can be written to in
any order but must be followed by LDAC
and then a fine DAC_ write (to
FINECALTHRU_ or FINECAL_ with another
LDAC). This ensures that the fine DAC_
autocalibration is run after the coarse
DAC_ autocalibration.
Table 29. DAC Write Commands with Autocalibration