MAX1385 Datasheet, PDF (45/52 Pages) Maxim Integrated Products – Dual RF LDMOS Bias Controllers with I2C/SPI Interface

Dual RF LDMOS Bias Controllers
with I²C/SPI Interface
HS-MODE MASTER CODE
S
0
0
0
0
1
X
X
X
A
Sr
SDA
SCL
Figure 21. Changing to HS Mode
FS MODE
HS MODE
MASTER TO SLAVE
SLAVE TO MASTER
FS MODE
S
MASTER CODE
A Sr
SLAVE ADDRESS
FS MODE
R/W A
COMMAND/DATA
AP
FS MODE
N BYTES PLUS ACK
HS MODE CONTINUES
Sr SLAVE ADD
Figure 22. Changing to FS Mode or Staying in HS Mode
HS MODE CAN ALSO BE CONTINUED
WITH A COMMAND BYTE
Applications Information
ADC Clock Mode 11
See Figure 23 for an example of configuring a conver-
sion scan for internal temperature, PGAOUT1, and
ADCIN1 in clock mode 11 using the internal reference.
Timing symbols are referenced in the Miscellaneous
Timing Characteristics section.
See Figure 24 for an example of configuring a conver-
sion scan for ADCIN1, external temperature sensor 2,
and PGAOUT2 in clock mode 11 using the internal ref-
erence. Timing symbols are referenced in the
Miscellaneous Timing Characteristics section.
Temperature-Threshold Examples
Table 26 shows some examples of temperature settings
in two’s-complement form.
Leap-Frogging the DACs for 18 Bits of
Resolution
Each DAC stage is configurable for leapfrog operation
by using the 8-bit coarse DACs in conjunction with the
10-bit fine DAC. Use the following procedure for setting
18 bits of resolution:
1) Write to the Coarse DAC1/DAC2 Write-Through Low
Wiper Input register (THRULO1/THRULO2)
2) Write to the Coarse DAC1/DAC2 Write-Through High
Wiper Input register (THRUHIGH1/THRUHIGH2) with
a value one higher or one lower than written to the
low wiper register.
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