aduc7032 Analog Devices, Inc., aduc7032 Datasheet - Page 66

• Manufacturer Part Number: aduc7032
• Description: Microconverter Integrated, Precision Battery Sensor
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
Temperature ADC Diagnostics
The ADuC7032 features the capability to detect Open Circuit
conditions on the Temperature Channel inputs. This is
accomplished using the two current sources on VTEMP+ and
GND_SW, which is controlled via ADC2CON[14,13].
The use of both the VTEMP+ and GND_SW current sources is
shown in Table 34.
Short Between GND_SW and
Short Between IIN+ and GND
Short Between IIN- and GND
Short between IIN+ and IIN-
Short between VTEMP+ and
Short Between VTEMP+ and
GND_SW at pins of device
GND_SW Open Circuit
VTEMP+ Open Circuit
Fault Condition
Fault Condition
IIN+ Open Circuit
IIN- Open Circuit
at pins of device
GND
GND
VTEMP+ or GND_SW
Current Source
Current Source
IIN+ or IIN-
Enabled
Enabled
GND_SW
GND_SW
VTEMP+
VTEMP+
IIN+
IIN+
IIN-
IIN-
Table 34: Temperature ADC Diagnostics
Table 33: Current ADC Diagnostics
Rev. PrD | Page 66 of 128
No difference between ADC0DAT result prior to and after IIN+
No difference between ADC0DAT result prior to and after IIN+
No difference between ADC0DAT result prior to and after IIN-
No difference between reading prior to and after VTEMP+ or
No difference between reading prior to and after GND_SW
No difference between reading prior to and after VTEMP+
To verify the Temperature ADC is converting correctly, it is
possible to select an internal test voltage via ADC2CON[7,6].
Selecting mode 10 results in the current ADC converting the
Voltage Reference, e.g. The Precision 1.2V Reference, divided
by 136.
Negative Full Scale ( 0x8000 in Bi Polar Mode )
Negative Full Scale ( 0x8000 in Bi Polar Mode )
Positive Full Scale ( 0x7FFF in Bi Polar Mode )
Positive Full Scale ( 0x7FFF in Bi Polar Mode )
GND_SW current source is enabled
(or IIN-) current source is enabled
current source is enabled
current source is enabled
current source is enabled
current source is enabled
ADC0DAT Result
ADC0DAT Result
ADuC7032