Datasheet

Data Sheet ADT7320
Rev. 0 | Page 11 of 24
1 SPS MODE
In 1 SPS mode, the part performs one measurement per second.
A conversion takes 60 ms typically, and the part remains in the
idle state for the remaining 940 ms period. This mode is
enabled by setting Bits[6:5] of the configuration register
(Register Address 0x01) to 10.
SHUTDOWN MODE
The ADT7320 can be placed in shutdown mode by setting
Bits[6:5] of the configuration register (Register Address 0x01) to
11. The ADT7320 can be taken out of shutdown mode by
setting Bits[6:5] of the configuration register (Register Address
0x01) to 00. The ADT7320 typically takes 1 ms (with a 0.1 μF
decoupling capacitor) to come out of shut-down mode. The
conversion result from the last conversion prior to shutdown
can still be read from the ADT7320 even when it is in shutdown
mode. When the part is taken out of shutdown mode, the
internal clock restarts and a conversion is initiated.
FAULT QUEUE
Bit 0 and Bit 1 of the configuration register (Register Address 0x01)
are used to set up a fault queue. Up to four faults are provided to
prevent false tripping of the INT and CT pins when the ADT7320
is used in a noisy temperature environment. The number of
faults set in the queue must occur consecutively to set the INT
and CT outputs. For example, if the number of faults set in the
queue is four, then four consecutive temperature conversions
must occur, with each result exceeding a temperature limit set in
any of the limit registers, before the INT and CT pins are activated.
If two consecutive temperature conversions exceed a temperature
limit and the third conversion does not, the fault count is reset to
zero.