Rainbow-electronics MAX5515 Manual de usuario descargar pdf (Pagina 15)

MAX5512–MAX5515

Dual, Ultra-Low-Power,

8-Bit, Voltage-Output DACs

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Table 2. Serial Interface Programming Commands

CONTROL BITS

INPUT DATA

SUB-BITS

C2 C1 C0

D7–D0

S3, S2, S1, S0

FUNCTION

0000 XXXXXXXX 0000 No operation; command is ignored.

0001 8-bit data 0000

Load input register A from shift register; DAC registers unchanged;

DAC outputs unchanged.

0010 8-bit data 0000

Load input register B from shift register; DAC registers unchanged;

DAC outputs unchanged.

0011 ——Command reserved. Do not use.

0100 ——Command reserved. Do not use.

0101 ——Command reserved. Do not use.

0110 ——Command reserved. Do not use.

0111 ——Command reserved. Do not use.

1000 8-bit data 0000

Load DAC registers A and B from respective input registers; DAC

outputs A and B updated; MAX5513/MAX5515 enter normal

operation if in standby or shutdown; MAX5512/MAX5514 enter

normal operation if in shutdown.

1001 8-bit data 0000

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; MAX5513/MAX5515 enter normal operation if in

standby or shutdown; MAX5512/MAX5514 enter normal operation

if in shutdown.

1010 8-bit data 0000

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; MAX5513/MAX5515 enter normal operation if in

standby or shutdown; MAX5512/MAX5514 enter normal operation

if in shutdown.

1011 ——Command reserved. Do not use.

1100

D7, D6,

XXXXXX

0000

MAX5513/MAX5515 enter standby*, MAX5512/MAX5514 enter

shutdown. For the MAX5513/MAX5515, D7 and D6 configure the

internal reference voltage (Table 3).

1101

D7, D6,

XXXXXX

0000

MAX5512–MAX5515 enter normal operation; DAC outputs reflect

existing contents of DAC registers. For the MAX5513/MAX5515,

D7 and D6 configure the internal reference voltage (Table 3).

1110

D7, D6,

XXXXXX

0000

MAX5512–MAX5515 enter shutdown; DAC outputs set to high

impedance. For the MAX5513/MAX5515, D7 and D6 configure the

internal reference voltage (Table 3).

1111 8-bit data 0000

Load input registers A and B and DAC registers A and B from shift

normal operation if in standby or shutdown; MAX5512/MAX5514

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.

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