GC5330IZEV Datasheet, PDF (36/49 Pages) Texas Instruments – Wideband Transmit-Receive Digital Signal Processors

GC5330
GC5337
SLWS226 B – DECEMBER 2010 – REVISED JANUARY 2011
DAC Data, DAC Frame
www.ti.com
DAC Data Clock
Min
Skew
Max
Skew
Min
Max
Skew
Skew
Ideal
Ideal
Data
Data
Placement
Placement
T0511-01
Figure 19. TX LVDS Timing Specifications (TXA and TXB) (DACCLK Aligned With Data)
The envelope modulator interface uses the same pins as the DAC interface. The ET connections are shown in
Table 5. The ET modulator timing is listed in Table 15.
Data is output most-significant byte (half-word) first with the rising edge of the clockout in the middle of
data-stable time, then least-significant byte (half-word) with the falling edge of the clockout in the middle of the
data-stable time.
The ADC output interface has two types of timing, based on the clock centered over the data, or clock
edge-aligned with the data. The GC533x only processes clock centered over the data. Each ADC type is
characterized by the data and clock alignment, in Table 17, from which the proper table and timing diagram can
be determined as follows: ADC W7 in Table 18 and Figure 20; ADC W14 in Table 19 and Figure 21; and ADC
B7 in Table 20 and Figure 20. Note: The general ADC routing is to align the clock and data traces with a
common routing delay. For the ADS5463 and ADS5474 the clock trace must be adjusted in length to meet the
system timing design.
Note: when RXA is used as a baseband interface, the specification is shown in table Table 17. The table shows
a sampling of ADCs released at publication time. If the clock is not centered, the pc board may require added
routing delay to the clock out to satisfy the setup time requirements. See (*) in Table 17.
W7 – word-wide ADC interface, clock on bit 7
W14 – word-wide ADC interface, clock on bit 14
B7 – byte-wide ADC interface, clock on bit 7
B14 – byte-wide ADC interface, clock on bit 14
36
Submit Documentation Feedback
Product Folder Link(s): GC5330 GC5337
© 2010–2011, Texas Instruments Incorporated