ADP1048 Analog Devices, ADP1048 Datasheet - Page 64

• Manufacturer Part Number: ADP1048
• Description: Digital Power Factor Correction Controller with accurate AC Power Metering
• Manufacturer: Analog Devices

ADP1047/ADP1048
RTD ADC GAIN TRIM SETTING REGISTER
This register must be unlocked for write access; see Table 61.
Table 86. Register 0xFE18—RTD ADC Gain Trim Setting
Bits
7
[6:0]
OT_FAULT_LIMIT REGISTER
This register sets the overtemperature fault threshold. The debounce time of the overtemperature fault flag is 100 ms.
Table 87. Register 0xFE19—OT_FAULT_LIMIT
Bits
[7:0]
OT_WARN_LIMIT REGISTER
This register sets the overtemperature warning threshold. The debounce time of the overtemperature warning flag is 100 ms.
Table 88. Register 0xFE1A—OT_WARN_LIMIT
Bits
[7:0]
Bit Name
Gain polarity
RTD ADC gain trim
Bit Name
OT fault threshold
Bit Name
OT warning threshold
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
1 = negative gain is introduced.
0 = positive gain is introduced.
This value sets the amount of gain trim that is applied to the RTD sensing gain.
Description
Overtemperature fault threshold. This register, adding 0 as the MSB, results in a 9-bit threshold
value. This 9-bit value is compared to the nine MSBs of the RTD ADC reading. If the RTD ADC
reading is lower than the threshold set by these bits, the overtemperature fault flag is set.
These eight bits provide 256 threshold settings from 0 mV to 800 mV (one LSB = 800 mV/256 =
3.125 mV). However, the lowest allowed value is 9.375 mV (0x03), and the highest allowed
value is 781.25 mV (0xFA).
Bit 7
0
0
0
…
1
1
Description
Overtemperature warning threshold. This register, adding 0 as the MSB, results in a 9-bit threshold
value. This 9-bit value is compared to the nine MSBs of the RTD ADC reading. If the RTD ADC
reading is lower than the threshold set by these bits, the overtemperature warning flag is set.
These eight bits provide 256 threshold settings from 0 mV to 800 mV (one LSB = 800 mV/256 =
3.125 mV). However, the lowest allowed value is 9.375 mV (0x03), and the highest allowed
value is 781.25 mV (0xFA).
Bit 7
0
0
0
…
1
1
Bit 6
0
0
0
…
1
1
Bit 6
0
0
0
…
1
1
Rev. 0 | Page 64 of 84
…
…
…
…
…
…
…
…
…
…
…
…
…
…
Bit 3
0
0
0
1
1
Bit 3
0
0
0
…
1
1
…
Bit 2
0
1
1
…
0
0
Bit 2
0
1
1
…
0
0
Bit 1
1
0
0
…
0
1
Bit 1
1
0
0
…
0
1
Bit 0
1
0
1
…
1
0
Bit 0
1
0
1
…
1
0
OTP Threshold (mV)
OTP Threshold (mV)
9.375
12.5
15.875
…
778.125
781.25
9.375
12.5
15.875
…
778.125
781.25
Data Sheet