MAX6662 Maxim Integrated Products, MAX6662 Datasheet - Page 5

• Manufacturer Part Number: MAX6662
• Description: 12-Bit + Sign Temperature Sensor
• Manufacturer: Maxim Integrated Products

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For example: If T
to 20°C, ALERT does not assert until temperature
exceeds 100°C. If the temperature is then read through
the serial interface, ALERT deasserts. ALERT asserts
again when temperature is less than 80°C (Figure 2).
In the comparator mode, ALERT is asserted when tem-
perature exceeds the value in the T
lower than the value in the T
deasserts when temperature is less than T
or greater than T
does not deassert ALERT.
For example: If T
to 80°C, ALERT does not assert until temperature
exceeds 100°C, or is below 80°C. Then, ALERT only
deasserts if temperature is less than T
greater than T
Figure 1. MAX6662 Simplified Functional Diagram
LOW
HIGH
HIGH
LOW
_______________________________________________________________________________________
+ T
HYST
12-Bit + Sign Temperature Sensor with
is set to 100°C and T
+ T
is set to 100°C and T
V
CC
HYST
.
12 -BIT
+ SIGN
. Reading the registers
LOW
ADC
TEMPERATURE
Comparator Mode
HIGH
SIO
SCLK
CS
register. ALERT
SPI-Compatible Serial Interface
HIGH
register, or is
HIGH
HYST
LOW
- T
T
LOW
HYST
- T
SERIAL INTERFACE
is set
is set
HYST
T
HIGH
or
T
MAX
T
OT operates only in comparator mode. The OT pin is
asserted when the temperature exceeds T
deasserted when the temperature drops below
T
OT is an open-drain active-low (default) output, but can
be programmed to active-high.
Figure 2. Example of ALERT Operation in Interrupt Mode
HYST
T
MAX
T
* TEMPERATURE READ
HIGH
LOW
CONFIGURATION
+ T
- T
ALERT
T
T
- T
HYST
HYST
HIGH
LOW
HYST
. A read operation does not reset OT.
TEMPERATURE
*
Overtemperature Alert
THRESHOLD STILL CHANGES TO T
LAST INTERRUPT MISSED, BUT
*
OT
ALERT
*
MAX
HIGH
, and
.
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