W-CDMA/W-TDD/TD-SCDMA Zero-IF Receivers
Table 4. Configuration Register (CONFIG, Address 1111)
BIT
B11, B10, B9,
B8, B7
POWER-UP
STATE
00000
BIT NAME
(RESERVED)
Set to 0 for normal operation.
FUNCTION
For MAX2393 only:
B6
B5
B4
B3
1
1
1
1
BW_SEL
(RESERVED)
DC_CANCEL_EN
RF_PLL_EN
LO_GEN_EN
VCO_EN
1 = selects the 3G W-CDMA mode for baseband filters.
0 = selects the TD-SCDMA mode for baseband filters.
Set to 1 for normal operation.
0 = disables the automatic DC-offset-cancellation circuit.
For MAX2390–MAX2393/MAX2401:
0 = disables the RF PLL + LO generation circuit.
For MAX2396/MAX2400:
0 = disables the LO generation circuit.
0 = disables the VCO.
For MAX2390–MAX2393/MAX2401:
A 2-bit word sets the RF charge-pump current as follows:
CP1, CP0
0 0 = 1000μA
0 1 = 1500μA
B2, B1
11
(RESERVED)
1 0 = 2000μA
1 1 = 2500μA
For MAX2396/MAX2400:
Set to 11 for normal operation.
B0
1
LNA_EN
0 = disables on-chip LNA. Set to zero for external LNA.
30
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