Datasheet

AD5560 Data Sheet
Rev. D | Page 52 of 68
Table 23. Diagnostic Register
Address Default Data Bits, MSB First
0x7 0x0000
Bit Name Function
15
14
13
12
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 Disabled Disabled
4
Force amplifier
Disabled
Disabled
5 EXTFORCE1A EXTFORCE2A
6
FINP
FINM
7 Output 2.5 mA Output 25 mA
8 Measure block VPTAT low VPTAT high
9
VTSD low (ref V
for −273°C)
VTSD high (ref V for +130°C)
10 MI VMID Code
11 MV VMIN Code
12 DAC block FORCE DAC VOS DAC
13 CLL DAC CLH DAC
14 CPL DAC CPH DAC
15 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.
11
10
9
8
7
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
8 Cool block
Cool end of high current drivers, hot side of digital
block
9 25 mA output stage
10
Hottest part of sensitive measurement circuitry
and cool part of force amplifier
11
Coolest end of force amplifier block
12 Coolest end of DACs
13 Beside TSENSE available on MEASOUT
14 Hottest part of DACs
15 Cool side of digital block
16
Force amplifier
PNPs
1A-1
17 1A-2
18
2A (similar location to VPTAT low for EXTFORCE2
range)
19
1B-1 (similar location to VPTAT low for EXTFORCE1
range)
20
1B-2
21 2B
22 1C-1
23 1C-2