REV. A
ADM1027
33
Example: Calculate T
MAX
, given T
MIN
= 30rC, T
RANGE
= 40rC,
and PWM
MIN
= 33% duty cycle = 85 decimal
T
T
MaxD C
MinD C
T
MAX
MIN
RANGE
=
+
-
(
)
?/DIV>
. .
. .
170
T
C
C
MAX
= r +
-
(
)
?nbsp r
30
100
33
40
170
%
%
T
C
C
MAX
= r +
-
(
)
?nbsp r
30
255 85 40
170
T
MAX
= 70rC (effective T
RANGE
= 40rC)
Example: Calculate T
MAX
, given T
MIN
= 30rC, T
RANGE
= 40rC,
and PWM
MIN
= 50% duty cycle = 128 decimal
T
T
MaxD C
MinD C
T
MAX
MIN
RANGE
=
+
-
(
)
?/DIV>
. .
. .
170
T
C
C
MAX
= r +
-
(
)
?nbsp r
30
100
50
40
170
%
%
T
C
C
MAX
= r +
-
(
)
?nbsp r
30
255 128 40
170
T
MAX
= 60rC (effective T
RANGE
= 30rC)
Selecting a T
RANGE
Slope
The T
RANGE
value can be selected for each temperature channel:
Remote 1, Local and Remote 2 Temp. Bits <7:4> (TRANGE)
of Registers 0x5F to 0x61 define the T
RANGE
value for each
temperature channel.
Bits <7:4>*
T
RANGE
(rC)
0000
2
0001
2.5
0010
3.33
0011
4
0100
5
0101
6.67
0110
8
0111
10
1000
13.33
1001
16
1010
20
1011
26.67
1100
32 (default)
1101
40
1110
53.33
1111
80
*Register 0x5F configures remote 1 T
RANGE
.
Register 0x60 configures local T
RANGE
.
Register 0x61 configures remote 2 T
RANGE
.
Rev. 3 | Page 33 of 56 | www.onsemi.com
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