AD1955 Analog Devices, AD1955 Datasheet - Page 7

• Manufacturer Part Number: AD1955
• Description: High Performance, Multibit Sigma-delta DAC With Sacd Playback
• Manufacturer: Analog Devices

Left and Right channel data are valid on rising edge of EF_BCLK. After LSB data is clocked in the AD1955, the falling edge of
EF_WCLK signal loads all of data and starts conversion. The mode can be set to Left or Right-justified. A burst mode BCLK is also
acceptable in Left-justified mode.
Rev. PrF
L R C L K
B C L K
S D A T A
L R C L K
B C L K
S D A T A
L R C L K
B C L K
S D A T A
L R C L K
B C L K
S D A T A
N O T E S : 1 . D S P M O D E D O E S N 'T I D E N T I F Y C H A N N E L
2 . L R C L K N O R M A L L Y O P E R A T E S A T F s E X C E P T F O R D S P M O D E W H I C H I S 2 x F s
3 . B C L K F R E Q U E N C Y I S N O R M A L L Y 6 4 x L R C L K B U T M A Y B E O P E R A T E D I N B U R S T M O D E
M S B
M S B
M S B
M S B
L E F T C H A N N E L
L E F T C H A N N E L
L E F T C H A N N E L
R I G H T J U S T I F I E D M O D E - S E L E C T N U M B E R O F B I T S P E R C H A N N E L
L E F T J U S T I F I E D M O D E - 1 6 T O 2 4 - B I T S P E R C H A N N E L
Figure 1. Supported Serial Data Formats
L S B
Figure 2. Serial Data Port Timing
I 2 S M O D E - 1 6 T O 2 4 - B I T S P E R C H A N N E L
D S P M O D E - 1 6 T O 2 4 - B I T S P E R C H A N N E L
L S B
L S B
L S B
-7-
1 / F s
M S B
M S B
M S B
M S B
R I G H T C H A N N E L
R I G H T C H A N N E L
R I G H T C H A N N E L
L S B
L S B
L S B
L S B
AD1955