DS90UB903QSQ Datasheet, PDF (33/45 Pages) Texas Instruments – DS90UB903Q/DS90UB904Q 10 - 43MHz 18 Bit Color FPD-Link III Serializer and Deserializer

DS90UB903Q, DS90UB904Q
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APPLICATIONS INFORMATION
SNLS332E – JUNE 2010 – REVISED APRIL 2013
AC COUPLING
The SER/DES supports only AC-coupled interconnects through an integrated DC balanced decoding scheme.
External AC coupling capacitors must be placed in series in the FPD-Link III signal path as illustrated in
Figure 36.
D_OUT+
D
D_OUT-
R_IN+
R
R_IN-
Figure 36. AC-Coupled Connection
For high-speed FPD-Link III transmissions, the smallest available package should be used for the AC coupling
capacitor. This will help minimize degradation of signal quality due to package parasitics. The I/O’s require a 100
nF AC coupling capacitors to the line.
TYPICAL APPLICATION CONNECTION
Figure 37 shows a typical connection of the DS90UB903Q Serializer.
VDDIO
DS90UB903Q (SER)
1.8V
C12 C8
FB1
C3
VDDIO
VDDT
C4
FB2
C9 C13
I2C
Bus
Interface
LVCMOS
Parallel
Bus
LVCMOS
Control
Interface
GPO
Control
Interface
VDDIO
DIN0
DIN1
DIN2
DIN3
DIN4
DIN5
DIN6
DIN7
DIN8
DIN9
DIN10
DIN11
DIN12
DIN13
DIN14
DIN15
DIN16
DIN17
DIN18
DIN19
DIN20
PCLK
MODE
PDB
GPO[0]
GPO[1]
GPO[2]
GPO[3]
FB6
FB7
Optional
RPU
C14
RPU
SCL
SDA
C15
Optional
VDDPLL
C10 C5
FB3
VDDCML
C11 C6
FB4
VDDD
C7
FB5
DOUT+
DOUT-
ID[X]
RES
DAP (GND)
C1
C2
1.8V
Serial
FPD-Link III
Interface
10 k:
RID
NOTE:
C1 - C2 = 0.1 PF (50 WV)
C3 - C9 = 0.1 PF
C10 - C13 = 4.7 PF
C14 - C15 = >100 pF
RPU = 1 k: to 4.7 k:
RID (see ID[x] Resistor Value Table)
FB1 - FB7: Impedance = 1 k: (@ 100 MHz)
low DC resistance (<1:)
The "Optional" components shown are
provisions to provide higher system noise
immunity and will therefore result in higher
performance.
Figure 37. DS90UB903Q Typical Connection Diagram — Pin Control
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