AK8456 Datasheet, PDF (22/32 Pages) Asahi Kasei Microsystems – 3 channel input 16bit 30MSPS Video ADC with LED driver

[AK8456]
 Cascade Output Mode
It is possible that connect two AK8456’s output pins to same 8bit bus by cascade output
mode. The cascade output mode is available only in 3-channle input mode. It becomes the
normal output regardless of the cascade mode register setting when the channel 1 input. If
use cascade mode, please release the power-down after setting the device ID and cascade
mode register.
Select the cascade mode in the register and set 0 in ID register of one and set 1 in ID register
of the other. Device of ID0 outputs the data before, ID1 devices will output the data then
refer to SHD pulse. D7~D0 become high impedance when these pins don’t output A/D data.
D7~D0 are open drain output in cascade mode. Please connect pull-up resistance to each
data output pin. Maximum sampling rate in cascade mode is 5MSPS/ch.
AK8456
#0
D7~D0 ⁸
SCLK, SDATA ²
SDENB1
AK8456
#1
D7~D0 ⁸
SCLK, SDATA ²
8
Control
IC
SDENB2
CISIN0~2 0
1
2
3
SHD
ADCK
D7~D0
ML ML ML
ML ML ML
MLML ML
#0
D7~D0 ^{M L}
CISIN0
CISIN2
ML ML ML
CISIN1
ML ML ML
ML ML ML
#1
CISIN0
CISIN2
CISIN1
Fig.24 Cascade mode explanation
014002433-E-00
- 22 -
2014/06