Does the AD7416 setpoint registers with 10 MSB or 9 MSB? And what is the default value? Seems the datasheet conflict itself.

Question asked by 1991mars on Aug 31, 2016
Latest reply on Jan 5, 2017 by KarenNE

On the datasheet it said temperature value register is 10 MSB, however OTI and HYST setpoint register is 9 MSB. As I assume this is right.

As shown below OTI setpoint register default is 80.

And HYST setpoint register default is 75.

Later in the article shows:

The conversion formula:

if 9 MSB:

0x4B00 = (0100 1011 0000 0000),

(0100 1011 0) = 150,

150/4 = 37.5

0x5500 = (0101 0101 0000 0000),

(0101 0101 0) = 170

170/4 = 42.5

if 10 MSB:

0x4B00 = (0100 1011 0000 0000),

(0100 1011 00) = 300,

300/4 = 75

0x5500 = (0101 0101 0000 0000),

(0101 0101 00) = 340,

340/4 = 85

It look to me 10 MSB is more reasonable from the calculation above, but OTI setpoint register default still off by 5.

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Also I look at another datasheet for LM75, data on that make much more sense to me (as shown below).