ADM1027 datasheet(33/56 Pages) AD

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REV. A

ADM1027

–33–

Example: Calculate TMAX, given TMIN = 30

∞C, TRANGE = 40∞C,

and PWMMIN = 33% duty cycle = 85 decimal

MaxD C

MinD C

MAX

MIN

RANGE

()¥

170

MAX

= ∞ +-

()¥ ∞

100

170

MAX

= ∞ +-

()¥ ∞

255

170

TMAX = 70

∞C (effective TRANGE = 40∞C)

Example: Calculate TMAX, given TMIN = 30

∞C, TRANGE = 40∞C,

and PWMMIN = 50% duty cycle = 128 decimal

MaxD C

MinD C

MAX

MIN

RANGE

()¥

170

MAX

= ∞ +-

()¥ ∞

100

170

MAX

= ∞ +-

()¥ ∞

255

128

170

TMAX = 60

∞C (effective TRANGE = 30∞C)

Selecting a TRANGE Slope

The TRANGE 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 TRANGE value for each

temperature channel.

Bits <7:4>

TRANGE (

∞C)

0000

0001

2.5

0010

3.33

0011

0100

0101

6.67

0110

0111

1000

13.33

1001

1010

1011

26.67

1100

32 (default)

1101

1110

53.33

1111

* Register 0x5F configures remote 1 TRANGE.

ADM1027 Datasheet(PDF) 33 Page - Analog Devices

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