DDC264 Datasheet, PDF (17/26 Pages) Texas Instruments – 64-Channel, Current-Input Analog-to-Digital Converter

DDC264
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Cascading Multiple Converters
Multiple DDC264 devices can be connected in a
serial configuration; see Figure 28.
DOUT can be used with DIN to daisy-chain multiple
DDC264 devices together to minimize wiring. In this
mode of operation, the serial data output is shifted
through multiple DDC264s; see Figure 28.
SBAS368C – MAY 2006 – REVISED JULY 2011
Figure 29 shows the timing diagram when the DIN
input is used to daisy-chain several devices. Table 6
gives the timing specification for data retrieval using
DIN.
Data Clock
Data
Retrieval DOUT DDC264
DIN DOUT DDC264
DIN DOUT DDC264
DIN DOUT DDC264
DIN
Output
Sensor
Figure 28. Daisy-Chained DDC264s
DVALID
DCLK
DIN
t_STDIDC
t_HDDIDC
DOUT
Input
256
MSB
Input
256
LSB
Input
255
MSB
Input 3 Input 2
LSB MSB
Input 2 Input 1
LSB MSB
Input 1
LSB
Figure 29. Timing Diagram When Using DDC264 DIN Function; See Figure 28
SYMBOL
t_STDIDC
t_HDDIDC
Table 6. Timing for DDC264 Data Retrieval Using DIN
DESCRIPTION
Set-up time from DIN to falling edge of DCLK
Hold time for DIN after falling edge of DCLK
MIN
TYP
10
10
MAX
Input
256
MSB
UNITS
ns
ns
Copyright © 2006–2011, Texas Instruments Incorporated
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