DAC8565 Datasheet, PDF (31/46 Pages) Texas Instruments – 16-Bit, Quad Channel, Ultra-Low Glitch, Voltage Output DIGITAL-TO-ANALOG CONVERTER with 2.5V, 2ppm/°C Internal Reference

DAC8565
www.ti.com
SBAS411A – JUNE 2007 – REVISED NOVEMBER 2007
OPERATION EXAMPLES: DAC8565
For the following examples, X = Don't care. Value can be either '0' or '1'.
Example 1: Write to Data Buffer A Through Buffer D; Load DAC A Through DAC D Simultaneously
• 1st: Write to data buffer A:
DB23
0
DB22
0
DB21
(LD1)
0
DB20
(LD0)
0
DB19
0
DB18
DB17
(DAC Sel 1) (DAC Sel 0)
0
0
DB16
(PD0)
0
DB15
DB15
DB14
DB14
DB13
DB13
DB12 DB11–DB0
DB12 DB11–DB0
• 2nd: Write to data buffer B:
DB23
0
DB22
0
DB21
(LD1)
0
DB20
(LD0)
0
DB19
0
DB18
DB17
(DAC Sel 1) (DAC Sel 0)
0
1
DB16
(PD0)
0
DB15
DB15
DB14
DB14
DB13
DB13
DB12 DB11–DB0
DB12 DB11–DB0
• 3rd: Write to data buffer C:
DB23
0
DB22
0
DB21
(LD1)
0
DB20
(LD0)
0
DB19
0
DB18
DB17
(DAC Sel 1) (DAC Sel 0)
1
0
DB16
(PD0)
0
DB15
DB15
DB14
DB14
DB13
DB13
DB12 DB11–DB0
DB12 DB11–DB0
• 4th: Write to data buffer D and simultaneously update all DACs:
DB23
0
DB22
0
DB21
(LD1)
1
DB20
(LD0)
0
DB19
0
DB18
DB17
(DAC Sel 1) (DAC Sel 0)
1
1
DB16
(PD0)
0
DB15
DB15
DB14
DB14
DB13
DB13
DB12 DB11–DB0
DB12 DB11–DB0
The DAC A, DAC B, DAC C, and DAC D analog outputs simultaneously settle to the specified values upon
completion of the 4th write sequence. (The DAC voltages update simultaneously after the 24th SCLK falling edge
of the fourth write cycle).
Example 2: Load New Data to DAC A Through DAC D Sequentially
• 1st: Write to data buffer A and load DAC A: DAC A output settles to specified value upon completion:
DB23
0
DB22
0
DB21
(LD1)
0
DB20
(LD0)
1
DB19
0
DB18
DB17
(DAC Sel 1) (DAC Sel 0)
0
0
DB16
(PD0)
0
DB15
DB15
DB14
DB14
DB13
DB13
DB12 DB11–DB0
DB12 D11–DB0
• 2nd: Write to data buffer B and load DAC B: DAC B output settles to specified value upon completion:
DB23
0
DB22
0
DB21
(LD1)
0
DB20
(LD0)
1
DB19
0
DB18
DB17
(DAC Sel 1) (DAC Sel 0)
0
1
DB16
(PD0)
0
DB15
DB15
DB14
DB14
DB13
DB13
DB12 DB11–DB0
DB12 D11–DB0
• 3rd: Write to data buffer C and load DAC C: DAC C output settles to specified value upon completion:
DB23
0
DB22
0
DB21
(LD1)
0
DB20
(LD0)
1
DB19
0
DB18
DB17
(DAC Sel 1) (DAC Sel 0)
1
0
DB16
(PD0)
0
DB15
DB15
DB14
DB14
DB13
DB13
DB12 DB11–DB0
DB12 D11–DB0
• 4th: Write to data buffer D and load DAC D: DAC D output settles to specified value upon completion:
DB23
0
DB22
0
DB21
(LD1)
0
DB20
(LD0)
1
DB19
0
DB18
DB17
(DAC Sel 1) (DAC Sel 0)
1
1
DB16
(PD0)
0
DB15
DB15
DB14
DB14
DB13
DB13
DB12 DB11–DB0
DB12 D11–DB0
After completion of each write cycle, DAC analog output settles to the voltage specified.
Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): DAC8565
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