Datasheet

MAX5522–MAX5525
Dual, Ultra-Low-Power,
10-Bit, Voltage-Output DACs
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Table 2. Serial-Interface Programming Commands
CONTROL BITS
INPUT DATA
SUB-BITS
C3
C2 C1 C0
D9–D0
S1 AND S0
FUNCTION
0000
XXXXXXXXXX
00 No operation; command is ignored.
0 0 0 1 10-bit data 00
Load input register A from shift register; DAC registers unchanged;
DAC outputs unchanged.
0 0 1 0 10-bit data 00
Load input register B from shift register; DAC registers unchanged;
DAC outputs unchanged.
0 0 1 1 — — Command reserved. Do not use.
0 1 0 0 — — Command reserved. Do not use.
0 1 0 1 — — Command reserved. Do not use.
0 1 1 0 — — Command reserved. Do not use.
0 1 1 1 — — Command reserved. Do not use.
1 0 0 0 10-bit data 00
Load DAC registers A and B from respective input registers; DAC
outputs A and B updated; MAX5523/MAX5525 enter normal
operation if in standby or shutdown; MAX5522/MAX5524 enter
normal operation if in shutdown.
1 0 0 1 10-bit data 00
Load input register A and DAC register A from shift register; DAC
output A updated; Load DAC register B from input register B; DAC
output B updated; MAX5523/MAX5525 enter normal operation if in
standby or shutdown; MAX5522/MAX5524 enter normal operation
if in shutdown.
1 0 1 0 10-bit data 00
Load input register B and DAC register B from shift register; DAC
output B updated; Load DAC register A from input register A; DAC
output A updated; MAX5523/MAX5525 enter normal operation if in
standby or shutdown; MAX5522/MAX5524 enter normal operation
if in shutdown.
1 0 1 1 — — Command reserved. Do not use.
1100
D9, D8,
XXXXXXXX
00
MAX5523/MAX5525 enter standby*, MAX5522/MAX5524 enter
shutdown. For the MAX5523/MAX5525, D9 and D8 configure the
internal reference voltage (Table 3).
1101
D9, D8,
XXXXXXXX
00
MAX5522–MAX5525 enter normal operation; DAC outputs reflect
existing contents of DAC registers. For the MAX5523/MAX5525,
D9 and D8 configure the internal reference voltage (Table 3).
1110
D9, D8,
XXXXXXXX
00
MAX5522–MAX5525 enter shutdown; DAC outputs set to high
impedance. For the MAX5523/MAX5525, D9 and D8 configure the
internal reference voltage (Table 3).
1 1 1 1 10-bit data 00
Load input registers A and B and DAC registers A and B from shift
register; DAC outputs A and B updated; MAX5523/MAX5525 enter
normal operation if in standby or shutdown; MAX5522/MAX5524
enter normal operation if in shutdown.
X = Don’t care.
*Standby mode can be entered from normal operation only. It is not possible to enter standby mode from shutdown.