ADT7460ARQZ ON Semiconductor, ADT7460ARQZ Datasheet - Page 33

• Manufacturer Part Number: ADT7460ARQZ
• Description: IC REMOTE THRML/FAN CTRLR 16QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7460ARQZ

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 120°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Full Temp Accuracy: +/- 3 C
• Digital Output - Bus Interface: Serial (3-Wire)
• Maximum Operating Temperature: + 120 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1. This register becomes read−only when the Configuration Register 1 lock bit is set to 1. Further attempts to write to this register have no effect.
Table 44. Register 0x36 — Dynamic T
Bit No.
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
Mnemonic
Reserved
PHTR1
PHTR2
CYR2
PHTL
R1T
R2T
LT
Read−only
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
MSB of 3−Bit Remote 2 Cycle Value. The other two bits of the code reside in Dynamic T
Control Register 2 (Reg. 0x37). These three bits define the delay time between making
subsequent T
system has associated thermal time constants that need to be found to optimize the response
of fans and the control loop.
Reserved for future use.
PHTR1 = 1 copies the Remote 1 current temperature to the Remote 1 operating point register if
THERM is asserted. The operating point contains the temperature at which THERM is
asserted. This allows the system to run as quietly as possible without affecting system
performance.
PHTR1 = 0 ignores any THERM assertions on the THERM pin. The Remote 1 operating point
register reflects its programmed value.
PHTL = 1 copies the local channel’s current temperature to the local operating point register if
THERM is asserted. The operating point contains the temperature at which THERM is
asserted. This allows the system to run as quietly as possible without affecting system
performance.
PHTL = 0 ignores any THERM assertions on the THERM pin. The local temperature operating
point register reflects its programmed value.
PHTR2 = 1 copies the Remote 2 current temperature to the Remote 2 operating point register if
THERM is asserted. The operating point contains the temperature at which THERM is
asserted. This allows the system to run as quietly as possible without system performance
being affected.
PHTR2 = 0 ignores any THERM assertions on the THERM pin. The Remote 2 operating point
register reflects its programmed value.
R1T = 1 enables dynamic T
T
and low limits for this zone.
R1T = 0 disables dynamic T
channel behaves as described in the Automatic Fan Control section.
LT = 1 enables dynamic T
is dynamically adjusted based on the current temperature, operating point, and high and low
limits for this zone.
LT = 0 disables dynamic T
behaves as described in the Automatic Fan Control section.
R2T = 1 enables dynamic T
T
and low limits for this zone.
R2T = 0 disables dynamic T
channel behaves as described in the Automatic Fan Control section.
MIN
MIN
MIN
value is dynamically adjusted based on the current temperature, operating point, and high
value is dynamically adjusted based on the current temperature, operating point, and high
Control Register 1 (Power−On Default = 0x00)
MIN
http://onsemi.com
adjustments in the control loop, in terms of number of monitoring cycles. The
ADT7460
MIN
MIN
33
MIN
MIN
MIN
MIN
control on the local temperature channel. The chosen T
control. The T
control on the Remote 1 temperature channel. The chosen
control on the Remote 2 temperature channel. The chosen
control. The T
control. The T
Description
MIN
MIN
MIN
value chosen is not adjusted, and the channel
value chosen is not adjusted, and the
value chosen is not adjusted, and the
(Note 1)
MIN
MIN
value