Datasheet

2–3

16 SCLKs

SCLK

DIN

(16-bit)

DIN

(15+1-bit)

MSB LSB

LSB

D15

D0=0D1

0 1 15 16

MSB

D15

D14

……

(See Note A)

NOTE A: d0 = 0 means no secondary-communication request (software secondary-request control, see Section 3.2).

Figure 2–3. Timing Sequence of DAC Channel (Primary Communication Only)

DIN (16-bit)

(See Note A)

DIN

(15+1-bit)

Primary Secondary

16 SCLKs

# SCLKs Between Sampling Period (See Note D)

16–bit DAC Data

# SCLKs Between

Primary

16 SCLKs

FS (Primary) and

FS (Secondary)

(See Note C)

15–bit DAC Data +

D0 = 1 (See Note B)

NOTES: A. FC has to be set high for a secondary communication request when 16-bit DAC data format is used (see Section 3.2).

B. D0 = 1 means secondary communication request (software secondary request control, see Section 3.2)

C. The number of SCLKs between FS (Primary) and FS (Secondary) is 128 if cascading devices are less than 5, or 256 if cascading

devices are greater than 4.

D. The number of SCLKs per data sampling period is 256 if cascading devices are less than 5, or 512 if cascading devices are greater

than 4.

Figure 2–4. Timing Sequence of DAC Channel (Primary and Secondary Communication)