Rainbow-electronics MAX5157 Manual do Utilizador descarregar pdf (Página 12)

MAX5156/MAX5157

Daisy Chaining Devices

Any number of MAX5156/MAX5157s can be daisy

chained by connecting the DOUT pin of one device to the

DIN pin of the following device in the chain (Figure 7).

Since the MAX5156/MAX5157’s DOUT has an internal

active pull-up, the DOUT sink/source capability deter-

mines the time required to discharge/charge a capaci-

tive load. Refer to the digital output V

and V

speci-

fications in the

Electrical Characteristics

Figure 8 shows an alternative method of connecting

several MAX5156/MAX5157s. In this configuration, the

data bus is common to all devices; data is not shifted

through a daisy-chain. More I/O lines are required in

this configuration because a dedicated chip-select

input (CS) is required for each IC.

Low-Power, Dual, 12-Bit Voltage-Output DACs

with Configurable Outputs

12 ______________________________________________________________________________________

SCLK

DIN

COMMAND

EXECUTED

A0 S0

D11

D10

D8 D5 D4 D3 D2 D1 D0D7 D6

Figure 5. Serial-Interface Timing Diagram

SCLK

DIN

CSO

CSS

CSW

CS1

CSH

Figure 6. Detailed Serial-Interface Timing Diagram

TO OTHER

SERIAL DEVICES

MAX5156

MAX5157

DIN

SCLK

MAX5156

MAX5157

MAX5156

MAX5157

DINDOUT DOUT DOUT

SCLK

DIN

SCLK

Figure 7. Daisy Chaining MAX5156/MAX5157s

1 2 ... 7 8 9 10 11 12 13 14 15 16

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