Rainbow Electronics MAX11008 - Manual (Page 16)

MAX11008
Dual RF LDMOS Bias Controller with
Nonvolatile Memory
16 ______________________________________________________________________________________
µC
5V
EXTERNAL
2.5V
REFERENCE
0.1µF 0.1µF
DV DD
*SELECT R F AND C F BASED ON DESIRED FILTER CUTOFF FREQUENCY WHERE f CUTOFF = 1/(2 π R F C F ).
LIMIT R F TO 100Ω TO MINIMIZE OFFSET ERRORS.
32V
RF OUT
RF IN
LDMOS 2
LDMOS 1
RF OUT
RF IN
C F *
C F *
R F *
R F *
R SENSE
R SENSE
0.1µF 0.1µF
DV DD AV DD
MAX11008
DGND AGND
CS1+
CS1-
GATE1
CS2+
CS2-
GATE2
DXP2
DXN2
DXP1
DXN1
DV DD AV DD
OPSAFE2
OPSAFE1
SCL/SCLK
SDA/DIN
ALARM
BUSY
PGAOUT1
REFADC
REFDAC
ADCIN1
ADCIN2
CNVST
A0/CS
A1/DOUT
SPI/I2C
PGAOUT2
Typical Application Circuits—SPI Interface