Datasheet

18
LTC1404
1404fa
TYPICAL APPLICATIONS
U
V
CC
A
IN
V
REF
V
SS
CLK
CONV
D
OUT
GND
TCLKX
TCLKR
TFSX
TFSR
TDR
LTC1404
TMS320C50-40MHZ
+
10µF
0.1µF
UNIPOLAR
INPUT
7.8MHz
EXTERNAL CLOCK
+
10µF
0.1µF
5V
1404 TA04a
1
2
3
84
6
7
5
Hardware Interface to the TMS320C50’s TDM Serial Port (Frame Sync is Generated from TFSX)
Logic Analyzer Waveforms Show 2.05µs Throughput Rate (Input Voltage = 1.606V, Output Code = 0110 0100 0110 = 1606
10
)
D0 X
X
1404 TA04c
D1
D2
D4
D5 D3
RDY
X
D11
D10 D9
D8
D7 D6
D2 D1 D0
1404 TA04d
D3
D4
D6
D7 D5
0
0
0
RDY D11
D10
D9 D8
NOTE: THE TMS320C50-40MHz HAS A LIMITED SERIAL PORT CLOCK SPEED OF 7.8MHz. TO ALLOW THE LTC1404 TO RUN AT
ITS MAXIMUM SPEED OF 9.6MHz, THE TMS320C50-57 OR TMS320C50-80MHz IS NEEDED
Data from the LTC1404 Loaded into the TMS320C50’s TRCV Register
Data Stored in the TMS320C50’s Memory (in Right Justified Format)
1404T A04B