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DAC8728_14 Datasheet, PDF (44/56 Pages) Texas Instruments – Octal, 16-Bit, Low-Power, High-Voltage Output, Parallel Input DIGITAL-TO-ANALOG CONVERTER
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DAC8728
SBAS466A – JUNE 2009 – REVISED NOVEMBER 2009
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Monitor Register (default = 0000h).
The Monitor Register selects one of the DAC outputs, reference buffer outputs, or offset DAC outputs to be
monitored through the VMON pin. Only one bit at a time can be set to '1'. When bits [D15:D4] = '0', the monitor is
disabled and VMON is in a Hi-Z state.
Note that if any value is written other than those specified in Table 12, the Monitor Register stores the invalid
value; however, the VMON pin is forced into a Hi-Z state.
Table 12. Monitor Register (Default = 0000h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3:D0
0
0
0
0
0
0
0
0
0
0
0
1
X (1)
VMON CONNECTS TO
Reference buffer B output
0
0
0
0
0
0
0
0
0
0
1
0
X
Reference buffer A output
0
0
0
0
0
0
0
0
0
1
0
0
X
Offset DAC B output
0
0
0
0
0
0
0
0
1
0
0
0
X
Offset DAC A output
0
0
0
0
0
0
0
1
0
0
0
0
X
DAC-0
0
0
0
0
0
0
1
0
0
0
0
0
X
DAC-1
0
0
0
0
0
1
0
0
0
0
0
0
X
DAC-2
0
0
0
0
1
0
0
0
0
0
0
0
X
DAC-4
0
0
0
1
0
0
0
0
0
0
0
0
X
DAC-4
0
0
1
0
0
0
0
0
0
0
0
0
X
DAC-5
0
1
0
0
0
0
0
0
0
0
0
0
X
DAC-6
1
0
0
0
0
0
0
0
0
0
0
0
X
DAC-7
0
0
0
0
0
0
0
0
0
0
0
0
X
Monitor function disabled, Hi-Z (default)
All other codes
Monitor function disabled, Hi-Z
(1) X = don't care. Writing to this bit has no effect; reading the bit returns '0'.
Input Data Register for DAC-n (where n = 0 to 7). Default = 0000h.
This register stores the DAC data written to the device when the SCE bit = '1'. When the SCE bit = '0' (default),
the DAC Data Register stores the DAC data written to the device. When the data are loaded into the
corresponding DAC latch, the DAC output changes to the new level defined by the DAC data. The default value
after power-on or reset is 0000h.
Table 13. DAC-n(1) Input Data Register
MSB
D15
D14 D13 D12 D11 D10 D9
DB15(2) DB14 DB13 DB12 DB11 DB10 DB9
D8
DB8
D7
DB7
D6
DB6
D5
DB5
D4
DB4
D3
DB3
D2
DB2
D1
DB1
LSB
D0
DB0
(1) n = 0, 1, 2, 3, 4, 5, 6, or 7.
(2) DB15:DB0 are the DAC data bits
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