Datasheet

MAX5723/MAX5724/MAX5725
Ultra-Small, Octal-Channel, 8-/10-/12-Bit Buffered
Output DACs with Internal Reference and SPI Interface
20Maxim Integrated
Table 2. SPI Commands Summary
COMMAND B23 B22 B21 B20 B19 B18 B17 B16 B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 DESCRIPTION
CONFIGURATION AND SOFTWARE COMMANDS WDOG 0 0 0 1 X X X X TIMEOUT SELECTION[11:4]
TIMEOUT
SELECTION[3:0]
WD_MASK
Safety
Level
00: Low
01: Med
10: High
11: Max
X
Updates watchdog settings and safety levels
REF 0 0 1 0 0
REF
Power
0 =
DAC
1 = ON
REF Mode
00 = EXT
01 = 2.5V 10 = 2.0V 11 = 4.1V
X X X X X X X X X X X X X X X X
Sets the reference operating mode. REF Power (B18): 0 = Internal reference is only powered if at least one DAC is powered 1 = Internal reference is always powered
SW_GATE_ CLR
0 0 1 1 0 0 0 0 1 0 0 1 0 1 1 0 0 0 1 1 0 0 0 0
Removes any existing GATE condition
SW_GATE_ SET
0 0 1 1 0 0 0 1 1 0 0 1 0 1 1
0 0 0 1 1 0 0 0 0 Initiates a GATE condition
WD_REFRESH 0 0 1 1 0 0 1 0 1 0 0 1 0 1 1 0 0 0 1 1 0 0 0 0
Refreshes the watchdog timer
WD_RESET 0 0 1 1 0 0 1 1 1 0 0 1 0 1 1 0 0 0 1 1 0 0 0 0
Reset the watchdog time out alarm status and refreshes the watchdog timer
SW_CLEAR 0 0 1 1 0 1 0 0 1 0 0 1 0 1 1 0 0 0 1 1 0 0 0 0
Executes a software clear (all CODE and DAC registers cleared to their DEFAULT values)
SW_RESET 0 0 1 1 0 1 0 1 1 0 0 1 0 1 1 0 0 0 1 1 0 0 0 0
Executes a software reset (all CODE, DAC, and control registers returned to their power-on reset values)
CONFIG 0 1 0 1 0 0 0 0
DAC7
DAC6
DAC5
DAC4
DAC3
DAC2
DAC1
DAC0
WDOG
Config.
00: DIS
01: GATE
10: CLR
11: HOLD
GATE_ENB
LDAC_ENB
CLEAR_ENB
X X X
Configures selected DAC Watchdog, GATE, LOAD, and CLEAR operations. DACs selected with a 1 in the corresponding DACn bit are updated, DACs with a 0 in the corresponding DACn bit are not impacted)