EVAL-ADT7467EBZ ON Semiconductor, EVAL-ADT7467EBZ Datasheet - Page 48

• Manufacturer Part Number: EVAL-ADT7467EBZ
• Description: BOARD EVALUATION FOR ADT7467
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of EVAL-ADT7467EBZ

• Sensor Type: Temperature
• Sensing Range: -40°C ~ 120°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1.5°C
• Voltage - Supply: 3 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: ADT7467
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADT7467
Note that the T
speed regardless of the configuration of the automatic fan
control settings. This allows some flexibility, because a T
value can be selected based on its slope, and a hard limit (such
as 70°C) can be programmed as T
the fan reaches full speed) by setting T
example, 70°C).
THERM Limit Registers
Register 0x6A, Remote 1 THERM limit = 0xA4 (100°C default)
Register 0x6B, local THERM limit = 0xA4 (100°C default)
Register 0x6C, Remote 2 THERM limit = 0xA4 (100°C default)
AMBIENT TEMP
THERM
REMOTE 2 =
REMOTE 1 =
VRM TEMP
CPU TEMP
LOCAL =
limits are nonmaskable and affect the fan
100%
0%
THERMAL CALIBRATION
THERMAL CALIBRATION
THERMAL CALIBRATION
T
T
T
T
MIN
MIN
MIN
MIN
MAX
(the temperature at which
THERM
T
RANGE
to that limit (for
T
T
T
RANGE
RANGE
RANGE
Figure 67. How T
T
100%
100%
100%
THERM
0%
0%
0%
Rev. 3 | Page 48 of 77 | www.onsemi.com
RANGE
MUX
THERM
Relates to Automatic Fan Control
PWM
PWM
PWM
MIN
MIN
MIN
Hysteresis Registers
Register 0x6D, Remote 1 and local hysteresis register
<7:4>, Remote 1 temperature hysteresis (4°C default)
<3:0>, local temperature hysteresis (4°C default)
Register 0x6E, Remote 2 temperature hysteresis register
<7:4>, Remote 2 temperature hysteresis (4°C default)
Because each hysteresis setting is four bits, hysteresis values are
programmable from 1°C to 15°C. It is recommended that
hysteresis values are not programmed to 0°C because this
disables hysteresis. In effect, this would cause the fans to cycle
between normal speed and 100% speed, creating unsettling
acoustic noise.
ENHANCEMENT)
ENHANCEMENT)
ENHANCEMENT)
TACHOMETER 1
MEASUREMENT
TACHOMETER 2
MEASUREMENT
TACHOMETER 3
MEASUREMENT
(ACOUSTIC
(ACOUSTIC
(ACOUSTIC
CONTROL
CONTROL
CONTROL
RAMP
RAMP
RAMP
AND 4
GENERATOR
GENERATOR
GENERATOR
CONFIG
CONFIG
CONFIG
PWM
PWM
PWM
PWM
PWM
PWM
PWM1
TACH1
PWM2
TACH2
PWM3
TACH3
FRONT CHASSIS
REAR CHASSIS
CPU FAN SINK