Rainbow-electronics MAX5821 Bedienungsanleitung PDF herunterladen (Seite 11)

Chip Information

TRANSISTOR COUNT: 11,186

PROCESS: BiCMOS

MAX5822

Dual, 12-Bit, Low-Power, 2-Wire, Serial

Voltage-Output DAC

______________________________________________________________________________________ 11

SERIAL DATA INPUT

C3 C2 C1 C0 D11 D10 D9 D8

FUNCTION

0000

DAC

DATA

DAC

DATA

DAC

DATA

DAC

DATA

Load DAC A input and DAC registers with new data.

Contents of DAC B input registers are transferred to the

DAC register. Both outputs are updated.

0001

DAC

DATA

DAC

DATA

DAC

DATA

DAC

DATA

Load DAC B input and DAC registers with new data.

Contents of DAC A input registers are transferred to the

DAC register. Both outputs are updated simultaneously.

0100

DAC

DATA

DAC

DATA

DAC

DATA

DAC

DATA

Load DAC A input register with new data. DAC outputs

remain unchanged.

0101

DAC

DATA

DAC

DATA

DAC

DATA

DAC

DATA

Load DAC B input register with new data. DAC outputs

remain unchanged.

1000

DAC

DATA

DAC

DATA

DAC

DATA

DAC

DATA

Data in all input registers is transferred to respective DAC

registers. All DAC outputs are updated simultaneously.

New data is loaded into DAC A input register.

1001

DAC

DATA

DAC

DATA

DAC

DATA

DAC

DATA

Data in all input registers is transferred to respective DAC

registers. All DAC outputs are updated simultaneously.

New data is loaded into DAC B input register.

1100

DAC

DATA

DAC

DATA

DAC

DATA

DAC

DATA

Load all DACs with new data and update all DAC outputs

simultaneously. Both input and DAC registers are updated

with new data.

1101

DAC

DATA

DAC

DATA

DAC

DATA

DAC

DATA

Load all input registers with new data. DAC outputs

remain unchanged.

1110 XXXX

Update all DAC outputs simultaneously. Device ignores

D11–D8. Do not send the data byte.

1111 0000

Extended command mode. The next word writes to the

power-down registers (Extended Command Mode).

1111 0001

Read DAC A data. The device expects an S

condition

followed by an address word with R/W = 1.

1111 0010

Read DAC B data. The device expects an S

condition

followed by an address word with R/W = 1.

Table 3. Command Byte Definitions

1 2 ... 6 7 8 9 10 11 12 13

Voltage-Output DAC 1
Voltage Output DAC 13

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