L64777 LSI Logic Corporation, L64777 Datasheet - Page 60

• Manufacturer Part Number: L64777
• Description: DVB Qam Modulator
• Manufacturer: LSI Logic Corporation

3-4
FT mode pins)
Figure 3.1
selected using
Figure 3.2 shows a typical application for interfacing with the outputs of
the two L64777 DACs.
Interfaces
(Test mode is
Functional
Test Bus
I Filter Output
Q Filter Output
10
10
10
Analog I/Q Output Interface Diagram
10-Bit DAC
10-Bit DAC
On-Chip
3
2
3
Off-Chip
AVSS1
VSS
R
R
AVSS2
VDDX1
AVDD1/COMP1
Differential I Output
QAM_I, QAM_In
Vref1
Vref2
VDDX2
AVDD2COMP2
Differential Q Output
QAM_Q, QAM_Qn