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3-Wire Serial Interface

DAC7551

SLAS441 – MARCH 2005

TYPICAL CHARACTERISTICS (continued)

The DAC7551 digital interface is a standard 3-wire SPI/QSPI/Microwire/DSP-compatible interface.

Table 1. Serial Interface Programming

CONTROL

DATA BITS

FUNCTION

DB15

DB14

DB13

DB12

DB11–DB0

(PD1)

(PD0)

X

X

0

0

data

Normal mode

X

X

0

1

X

Powerdown 1 k

Ω

X

X

1

0

X

Powerdown 100 k

Ω

X

X

1

1

X

Powerdown Hi-Z

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