ADT7476ARQZ ON Semiconductor, ADT7476ARQZ Datasheet - Page 64

• Manufacturer Part Number: ADT7476ARQZ
• Description: IC REMOTE THERMAL CTRLR 24QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7476ARQZ

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Counter, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Full Temp Accuracy: +/- 0.5 C
• Digital Output - Bus Interface: Serial (3-Wire, 4-Wire)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 50. Register 0x7B — TACH Pulses per Revolution Register (Power−On Default = 0x55)
Bit No.
[1:0]
[3:2]
[5:4]
[7:6]
Mnemonic
FAN1
FAN2
FAN3
FAN4
R/W
R/W
R/W
R/W
R/W
00 = 1
01 = 2 (default)
10 = 3
11 = 4
00 = 1
01 = 2 (default)
10 = 3
11 = 4
00 = 1
01 = 2 (default)
10 = 3
11 = 4
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Pulses Counted
Pulses Counted
Pulses Counted
Pulses Counted
Sets number of pulses to be counted when measuring Fan 1 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Sets number of pulses to be counted when measuring Fan 2 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Sets number of pulses to be counted when measuring Fan 3 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Sets number of pulses to be counted when measuring Fan 4 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
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Description