Direct-Conversion Tuner IC for
Digital DBS Applications
Functional Diagram
CPG1
CPG2
PLLIN+
PLLIN-
XTL+
XTL-
MOD+
MOD-
FDOUB
TANK+
TANK-
VCC
VRLO
CFLT
GND
RFIN-
RFIN+
GC1
GC2
FLCLK
INSEL
VOLTAGE
REGULATOR
MAX2104
CHARGE
PUMP
/8
CP
FB
XTLOUT
/32,
33
x2
0°/90°
BASEBAND
OFFSET
CORRECTION
PSOUT+
PSOUT-
IDC+
IDC-
QDC+
QDC-
IOUT+
IOUT-
QOUT+
QOUT-
RFOUT
8 _______________________________________________________________________________________