ADT7468ARQZ-RL7 ON Semiconductor, ADT7468ARQZ-RL7 Datasheet - Page 54

• Manufacturer Part Number: ADT7468ARQZ-RL7
• Description: IC REMOTE THERMAL CTLR 24QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7468ARQZ-RL7

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Counter, 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: 24-QSOP
• Full Temp Accuracy: +/- 2 C
• Digital Output - Bus Interface: Serial (2-Wire, 3-Wire, 4-Wire)
• Maximum Operating Temperature: + 120 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADT7468
MEASUREMENT
MEASUREMENT
TEMPERATURE
TEMPERATURE
TEMPERATURE
OPERATING
PREVIOUS
CURRENT
T1 (n – 1)
POINT
T1(n)
OP1
IS T1(n) – T1(n – 1) = 0.5 – 0.75° C
IS T1(n) – T1(n – 1) = 1.0 – 1.75° C
IS T1(n) – T1(n – 1) > 2.0° C
IS T1(n) – T1(n – 1)
MONITORING
(OP1 – HYS)
CYCLES
IS T1(n) >
WAIT n
0.25°C
YES
NO
NO
YES
DECREASE T
DECREASE T
DECREASE T
FOR CONSTANT)
DO NOTHING
DO NOTHING
COOLING OF
(SYSTEM IS
MIN
MIN
MIN
BY 1°C
BY 2° C
BY 4° C
MEASUREMENT
TEMPERATURE
TEMPERATURE
THERM LIMIT
OPERATING
OPERATING
HIGH TEMP
CURRENT
LOW TEMP
POINT
T1(n)
OP1
POINT
LIMIT
LIMIT
T
MIN
IS T1(n) < LOW TEMP LIMIT
ACTUAL
T
TEMP
HYSTERESIS
MIN
< HIGH TEMP LIMIT
IS T1(n) > OP1
MONITORING
T1(n) > T
T
MIN
WAIT 2n
CYCLES
AND
AND
AND
< OP1
NO
NO
MIN
YES
YES
DECREASE T
T
INCREASE
MIN
CHANGE
DO NOT
BY 1° C
BY 1° C
MIN