AD586 datasheet(31/44 Pages) AD

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Data Sheet

AD5737

Rev. B | Page 31 of 44

Status Register

The status register is a read-only register. This register contains

any fault information, as a well as a ramp active bit (Bit D9) and

a user toggle bit (Bit D11). When the STATREAD bit in the

main control register is set, the status register contents can be

read back on the SDO pin during every write sequence. Alterna-

tively, if the STATREAD bit is not set, the status register can be

read using the normal readback operation (see the Readback

Operation section).

Table 31. Decoding the Status Register

MSB

LSB

D15

D14

D13

D12

D11

D10

DC-DCD DC-DCC DC-DCB DC-DCA User

toggle

PEC

error

Ramp

active

Over

temp

IOUT_D

fault

IOUT_C

fault

IOUT_B

fault

IOUT_A

fault

X = don’t care.

Table 32. Status Register Bit Descriptions

Bit Name

Description

DC-DCD

This bit is set if the dc-to-dc converter on Channel D cannot maintain compliance, for example, if the dc-to-dc converter is

reaching its VMAX voltage; in this case, the IOUT_D fault bit is also set. See the DC-to-DC Converter VMAX Functionality section for

more information about the operation of this bit under this condition.

DC-DCC

This bit is set if the dc-to-dc converter on Channel C cannot maintain compliance, for example, if the dc-to-dc converter is

reaching its VMAX voltage; in this case, the IOUT_C fault bit is also set. See the DC-to-DC Converter VMAX Functionality section for

more information about the operation of this bit under this condition.

DC-DCB

This bit is set if the dc-to-dc converter on Channel B cannot maintain compliance, for example, if the dc-to-dc converter is

reaching its VMAX voltage; in this case, the IOUT_B fault bit is also set. See the DC-to-DC Converter VMAX Functionality section

for more information about the operation of this bit under this condition.

DC-DCA

This bit is set if the dc-to-dc converter on Channel A cannot maintain compliance, for example, if the dc-to-dc converter is

reaching its VMAX voltage; in this case, the IOUT_A fault bit is also set. See the DC-to-DC Converter VMAX Functionality section for

more information about the operation of this bit under this condition.

User Toggle

User toggle bit. This bit is set or cleared via the software register and can be used to verify data communications, if needed.

PEC Error

Denotes a PEC error on the last data-word received over the SPI interface.

Ramp Active

This bit is set while any output channel is slewing (digital slew rate control is enabled on at least one channel).

Over Temp

This bit is set if the AD5737 core temperature exceeds approximately 150°C.

IOUT_D Fault

This bit is set if a fault is detected on the IOUT_D pin.

IOUT_C Fault

This bit is set if a fault is detected on the IOUT_C pin.

IOUT_B Fault

This bit is set if a fault is detected on the IOUT_B pin.

IOUT_A Fault

This bit is set if a fault is detected on the IOUT_A pin.

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