Dual RF LDMOS Bias Controllers
with I 2 C/SPI Interface
HIGH-CAL
COARSE DAC_ HIGH WIPER OUTPUT REGISTER
HIWIPE_ REGISTER
HCAL
THRUHI_ REGISTER
V DACREF
TO 10-BIT FINE DAC
THRULO_ REGISTER
LOWIPE_ REGISTER
LCAL
COARSE DAC_ LOW WIPER OUTPUT REGISTER
LOW-CAL
LOAD DAC CONTROL REGISTER (LDAC)
Figure 5. Coarse-DAC Register Diagram
FROM 8-BIT COARSE DAC
LOAD DAC CONTROL REGISTER (LDAC)
FINE_ REGISTER
FINECAL_ REGISTER
FINECALTHRU_ REGISTER
FINE-CAL
FINE DAC_ OUTPUT REGISTER
10-BIT FINE
DAC
TO GATE-DRIVE BLOCK
FINETHRU_ REGISTER
FROM 8-BIT COARSE DAC
Figure 6. Fine-DAC Register Diagram
22
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