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| DAC8734_091 Datasheet, PDF (10/41 Pages) Texas Instruments – Quad, 16-Bit, High-Accuracy, ±16V Output, Serial Input DIGITAL-TO-ANALOG CONVERTER | |||
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DAC8734
SBAS465A â MAY 2009 â REVISED SEPTEMBER 2009 .................................................................................................................................................. www.ti.com
Case 3: Daisy-Chain mode, LDAC tied low.
t8
t4
CS
SCLK
SDI
t1
t3
t2
t5
t6
BIT 23 (N)
tF
BIT 22 (N)
SDO
tR
BIT 0 (N) BIT 23 (N+1)
t11
t12
BIT 23 (N)
Input Data Register and
t7
DAC Latch Updated(1)
BIT 0 (N+1)
BIT 0 (N)
Low
LDAC
Case 4: Daisy-Chain mode, LDAC active.
CS
SCLK
SDI
SDO
LDAC
t8
High
t4
t1
t3
t2
t5
t6
BIT 23 (N)
Input Data Register Updated
tR
t7
but DAC Latch is Not Updated
tF
BIT 22 (N)
BIT 0 (N) BIT 23 (N+1) BIT 0 (N+1)
t11
t12
BIT 23 (N)
BIT 0 (N)
t9
t10
= Donât Care
Bit 23 = MSB
Bit 0 = LSB
DAC Latch Updated
Figure 2. SPI Timing for Daisy-Chain Mode
10
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Copyright © 2009, Texas Instruments Incorporated
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