MAX522CSA Ver la hoja de datos (PDF) - Maxim Integrated

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MAX522CSA

Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SO Package

Maxim Integrated 

Dual, 8-Bit, Voltage-Output

Serial DAC in 8-Pin SO Package

CS

SCLK

DIN

UB1 UB2 UB3 SB SA UB4 LB LA

(CONTROL BYTE)

Figure 2. MAX522 3-Wire Serial-Interface Timing Diagram

OPTIONAL

INSTRUCTION

EXECUTED

D7 D6 D5 D4 D3 D2 D1 D0

(DATA BYTE)

Table 2. Serial-Interface Programming Commands

CONTROL

DATA

UB1 UB2 UB3 SB

SA UB4 LB

LA

B7

MSB

B6

B5

B4

B3

B2

B1

B0

LSB

FUNCTION

X X 1 * * 0 0 0 X X X X X X X X No Operation to DAC Registers

XX1 * * 000

Unassigned Command

XX1 * * 010

8-Bit DAC Data

Load Register to DAC B

XX1 * * 001

8-Bit DAC Data

Load Register to DAC A

XX1 * * 011

8-Bit DAC Data

Load Both DAC Registers

X X 1 0 0 0 * * X X X X X X X X All DACs Active

X X 1 0 0 0 * * X X X X X X X X Unassigned Command

X X 1 1 0 0 * * X X X X X X X X Shut Down DAC B

X X 1 0 1 0 * * X X X X X X X X Shut Down DAC A

X X 1 1 1 0 * * X X X X X X X X Shut Down All DACs

X = Don’t care.

* = Not shown, for the sake of clarity. The functions of loading and shutting down the DACs and programming the logic can be combined in a single

command.

Table 3. Example of a 16-Bit Input Word

Loaded

in First

Loaded

in Last

UB1 UB2 UB3 SB SA UB4 LB LA B7 B6 B5 B4 B3 B2 B1 B0

X

X

1

0

0

0

1

1

1

0

0

0

0

0

0

0

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