Datasheet

CS
Case1: StandaloneoperationwithoutputfromSDO, tiedlow.LDAC
Case2: Standalone , active.operationwithoutputfromSDO LDAC
SCLK
SDI
SDO
LDAC
t
9
t
8
t
4
t
5
t
6
t
3
t
1
t
2
t
7
InputRegister
andDACLatch
Updated
High-Z
Low
High-Z
Bit23(N 1)-
fromInputReg.
Bit22(N 1)-
fromInputReg.
Bit1(N 1)-
fromInputReg.
Bit0(N 1)-
fromInputReg.
Bit23(N) Bit22(N) Bit1(N) Bit0(N)
t
11
t
13
t
12
t
10
CS
SCLK
SDI
SDO
LDAC
t
9
t
8
t
4
t
5
t
6
t
3
t
1
t
2
t
7
InputRegister
Updated
High-Z
High
High-Z
=Don’tCare
Bit23=MSB
Bit0=LSB
Bit23(N 1)-
fromInputReg.
Bit22(N 1)-
fromInputReg.
Bit1(N 1)-
fromInputReg.
Bit0(N 1)-
fromInputReg.
Bit23(N) Bit22(N) Bit1(N) Bit0(N)
t
11
t
13
t
12
DACLatch
Updated
t
10
t
14
t
15
DAC9881
SBAS438A – MAY 2008 – REVISED AUGUST 2008 ......................................................................................................................................................... www.ti.com
Figure 2. Timing Diagram for Standalone Operation with SDO
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