AD9175 datasheet(60/150 Pages) AD

60 / 150 page

AD9175

Data Sheet

Rev. A | Page 60 of 150

÷2

NCO

DAC0 I DATA

÷2

SUM OF I NCO OUT DATA

TO DAC0 CORE

DAC0 Q DATA

NCO

DAC1 I DATA

SUM OF Q NCO OUT DATA

TO DAC1 CORE

DAC0 MOD SWITCH CONFIGURATION

DAC1 MOD SWITCH CONFIGURATION

DAC1 Q DATA

Figure 84. Configuration 1, CMPLX_MOD_DIV2_DISABLE = 0—DAC0 = I0 + I1, DAC1 = Q0 + Q1

NCO

DAC0 I DATA

TO DAC0 CORE

DAC0 Q DATA

NCO

DAC1 I DATA

DAC0 Q DATA

TO DAC1 CORE

DAC0 MOD SWITCH CONFIGURATION

DAC1 MOD SWITCH CONFIGURATION

DAC1 Q DATA

Figure 85. Configuration 2—DAC0 = I0, DAC1 = Q0

÷2

NCO

DAC0 I DATA

SUM OF NCOs REAL DATA

TO DAC0 CORE

DAC0 Q DATA

NCO

DAC1 I DATA

NO DATA

TO DAC1 CORE

DAC0 MOD SWITCH CONFIGURATION

DAC1 MOD SWITCH CONFIGURATION

DAC1 Q DATA

ZERO DATA

Figure 86. Configuration 3, CMPLX_MOD_DIV2_DISABLE = 0—DAC0 = I0 + I1, DAC1 = 0

Some configurations bypass the NCO altogether and route the

complex I and Q samples from each datapath to the DAC

core(s), whereas other modes route the output of the NCOs

instead. Of particular interest may be Configuration 2, shown in

Figure 85, where I samples are sent to DAC0 and Q samples are

sent to DAC1, to operate the AD9175 as a traditional IF DAC.

Configuration 3 routing also depends on whether NCO1 and/or

DAC1 is enabled. The configurations are set via Register 0x112,

Bits[5:4] and are paged by the MAINDAC_PAGE register control.

AD9175 Datasheet(PDF) 60 Page - Analog Devices

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