Rainbow-electronics MAX5531 Manual de usuario descargar pdf (Pagina 14)

MAX5530/MAX5531

Ultra-Low-Power, 12-Bit,

Voltage-Output DACs

14 ______________________________________________________________________________________

CONTROL BITS INPUT DATA

C3 C2 C1 C0 D11–D0

FUNCTION

0000

XXXXXXXXXXXX

No operation; command is ignored.

000112-bit data

Load input register from shift register; DAC register unchanged;

DAC output unchanged.

0010 — Command reserved; do not use.

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.

100012-bit data

Load DAC register from input register; DAC output updated;

MAX5530 enters normal operation if in shutdown; MAX5531 enters

normal operation if in standby or shutdown.

100112-bit data

Load input register and DAC register from shift register; DAC output

updated; MAX5530 enters normal operation if in shutdown;

MAX5531 enters normal operation if in standby or shutdown.

1010 — Command reserved; do not use.

1011 — Command reserved; do not use.

1100

D11, D10,

XXXXXXXXXX

MAX5530 enters shutdown; MAX5531 enters standby*. For the

MAX5531, D11 and D10 configure the internal reference voltage

(Table 3).

1101

D11, D10,

XXXXXXXXXX

MAX5530/MAX5531 enter normal operation; DAC output reflects

existing contents of DAC register. For the MAX5531, D11 and D10

configure the internal reference voltage (Table 3).

1110

D11, D10,

XXXXXXXXXX

MAX5530/MAX5531 enter shutdown; DAC output set to high

impedance. For the MAX5531, D11 and D10 configure the internal

reference voltage (Table 3).

111112-bit data

Load input register and DAC register from shift register; DAC output

updated; MAX5530 enters normal operation if in shutdown;

MAX5531 enters normal operation if in standby or shutdown.

Table 2. Serial-Interface Programming Commands

X = Don’t care.

*Standby mode can be entered from normal operation only. It is not possible to enter standby mode from shutdown.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19

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Rainbow-electronics MAX5531 Manual de usuario Pagina 14

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