MAX550AC/D Просмотр технического описания (PDF) - Maxim Integrated

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MAX550AC/D

+2.5V to +5.5V, Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package

Maxim Integrated 

+2.5V to +5.5V, Low-Power, Single/Dual,

8-Bit Voltage-Output DACs in µMAX Package

function. Data is clocked in starting with unassigned bit

1 (UB1), followed by the remaining control bits and the

DAC data byte. The data byte’s LSB (D0) is the last bit

clocked into the input register (Figure 2).

Table 5 is an example of a 16-bit input word that per-

forms the following functions:

• Loads 80 hex (128 decimal) into the DAC input regis-

ter (DAC A for the MAX548A/MAX549A)

• Updates the DAC register(s) on CS’s rising edge.

Table 6 shows how to calculate the output voltage

based on the input code. Figure 3 gives detailed timing

information.

INSTRUCTION

EXECUTED

CS

LDAC

MAX548A/

MAX550A

ONLY

SCLK

DIN

OPTIONAL

1

8

PAUSE

9

16

UB1 UB2 UB3 C2 C1 C0 A1 A0

D7 D6 D5 D4 D3 D2 D1 D0

Figure 2. Serial-Interface Timing Diagram

LDAC

tLDAC

tCSLD

CS

SCLK

DIN

tCSH0

tCSS0

tCH

tDS

tCL

tDH

tCSW

tCSH1

tCSS1

Figure 3. Detailed Serial-Interface Timing Diagram

8 _______________________________________________________________________________________

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