Rainbow-electronics MAX1329 Manual de usuario descargar pdf (Pagina 49)

MAX1329/MAX1330

12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,

Reference, Voltage Monitors, and Temp Sensor

______________________________________________________________________________________ 49

DAC Control Register

The DAC Control register configures the power states for

DACA, DACB, the op amps, DAC reference buffer, and

the internal reference. The DAC Control register also

controls the DACA and DACB input and output register

write modes. At power-up, all DACs and op amps are

powered down. When powered down, the outputs of the

DAC buffers and op amps are high impedance.

DAPD<1:0>: DACA Power-Down bits (default = 00).

DAPD<1:0> control the power-down states and write

modes for DACA (see Table 14).

DBPD<1:0>: (MAX1329 only) DACB Power-Down bits

(default = 00). DBPD<1:0> control the power-down states

and write modes for a DACB write as shown in Table 15.

OA1E: Op Amp 1 Enable bit (default = 0). Set OA1E = 1

to power up op amp 1.

OA2E (MAX1330 only): Op Amp 2 Enable bit (default =

0). Set OA2E = 1 to power up op amp 2.

DREF<1:0>: DAC Reference Buffer bits (default = 00).

DREF<1:0> sets the DAC reference buffer gain when

REFE = 0 (see Table 16). DREF<1:0> sets the REFDAC

voltage when the REFE = 1.

REFE: Internal Reference Enable bit (default = 0). REFE

= 1 enables the internal reference and sets REFADJ to

2.5V. REFE = 0 disables the internal reference so an

external reference can be applied at REFADJ, which

drives the inputs to the ADC and DAC reference

buffers. This bit is mirrored in the ADC Control register

so that writing either location updates both bits.

MAX1329

MSB LSB

NAME DAPD1 DAPD0 DBPD1 DBPD0 OA1E DREF1 DREF0 REFE

DEFAULT 0 0000000

MAX1330

MSB LSB

NAME DAPD1 DAPD0 X OA2E OA1E DREF1 DREF0 REFE

DEFAULT 0 0X00000

Table 14. DACA Power-Down Bit

Configuration

DAPD1 DAPD0

DACA POWER

MODE

DACA WRITE MODE

0 0 Powered down

Write input and output

0 1 Powered up

Write input and output

1 0 Powered up Write input register

1 1 Powered up

Shift input to output

Table 15. DACB Power-Down Bit

Configuration (MAX1329 Only)

DBPD1 DBPD0

DACB POWER

MODE

DACB WRITE

MODE

0 0 Powered down

Write input and

output register

0 1 Powered up

Write input and

output register

1 0 Powered up Write input register

1 1 Powered up

Shift input to output

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 77 78

MAX1329/MAX1330 1

Comentarios a estos manuales

Sin comentarios

Rainbow-electronics MAX1329 Manual de usuario Pagina 49

Comentarios a estos manuales

Relacionado con productos y manuales para Sensores Rainbow-electronics MAX1329