Datasheet

LNA1
Weight
Weight
Weight
Weight
LNA2~8
In-phase
CLK
Quadrature
CLK
I/V
I/V
Summed
In-Phase
Summed
Quadrature
Syncronized I/Q
CLOCKs
1
T
16
Fin 1X Clock
1X Clock
Phase 0°
Fin 4X Clock
1X Clock
Phase 90°
Quadrature
clocks
I/Q CLK
Generator
4X/8X Clock
D Q
INV
1X Clock
LNA1
Weight
Weight
Weight
Weight
LNA2~8
In-phase
CLK
Quadrature
CLK
I/V
I/V
Summed
In-Phase
Summed
Quadrature
AFE5808A
SLOS729B –OCTOBER 2011–REVISED APRIL 2012 www.ti.com
Figure 74. 8 X ƒ
cw
and 4 X ƒ
cw
Block Diagram
Figure 75. 8 x ƒ
cw
and 4 x ƒ
cw
Timing Diagram
1 × ƒ
cw
Mode
The 1x ƒ
cw
mode requires in-phase and quadrature clocks with low phase noise specifications. The phase
delay resolution is also achieved by weighting the in-phase and quadrature signals as described in the 8 × ƒ
cw
and 4 × ƒ
cw
modes.
Figure 76. Block Diagram of 1 x ƒ
cw
mode
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