AD5560JBCZ datasheet(52/68 Pages) AD

52 / 68 page

AD5560

Data Sheet

Rev. D | Page 52 of 68

Table 23. Diagnostic Register

Address

Default

Data Bits, MSB First

0x7

0x0000

Bit

Name

Function

DIAG

select[3:0]

DIAG select selects the set of diagnostic signals that can be made available on MEASOUT. First, use MEASOUT

addressing (DPS Register 1) to select either the DIAG A or the DIAG B node to be made available on MEASOUT.

DIAG Select

Selected

Measure Block

DIAG A

DIAG B

0:3

Disabled

Force amplifier

Disabled

EXTFORCE1A

EXTFORCE2A

FINP

FINM

Output 2.5 mA

Output 25 mA

Measure block

VPTAT low

VPTAT high

VTSD low (ref V

for −273°C)

VTSD high (ref V for +130°C)

VMID Code

VMIN Code

DAC block

FORCE DAC

VOS DAC

CLL DAC

CLH DAC

CPL DAC

CPH DAC

OSD DAC

DGS DAC

VPTAT low/VPTAT high are temperature sensor devices in the middle of the enabled power stage, which gives a

voltage level that can be mapped back to the VTSD low and VTSD high reference points to get a temperature

value. These sensors are used in the thermal shutdown feature. See the

Die Temperature Sensor and

Thermal Shutdown section.

VMID code is the midscale voltage of the DACs; the offset DAC has a direct effect on this voltage level.

VMIN code is the zero-scale voltage of the DACs; again the offset DAC has a direct effect.

TSENSE

select[3:0]

The following codes allow selection of one of three sets of eight thermal diodes. The D+ of the selected thermal

diode is available on the GPO pin; the D− is on the AGND.

These thermal diodes are located across the die, in the cool parts and in the power stages. Diodes [16:23] are located

in the force amplifier NPNs (power output devices for supplying current). Similarly, Diodes [24:31] are located in

the force amplifier PNP devices (output devices for sinking current).

TSENSE Select

Selected

Thermal Block

Connected Sensor

0:7

N/A—normal

GPO operation

No sensor connected

Cool block

Cool end of high current drivers, hot side of digital

block

25 mA output stage

Hottest part of sensitive measurement circuitry

and cool part of force amplifier

Coolest end of force amplifier block

Coolest end of DACs

Beside TSENSE available on MEASOUT

Hottest part of DACs

Cool side of digital block

Force amplifier

PNPs

1A-1

1A-2

2A (similar location to VPTAT low for EXTFORCE2

range)

1B-1 (similar location to VPTAT low for EXTFORCE1

range)

1B-2

1C-1

1C-2

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