參數(shù)資料
型號： 9TCS1085NLGI
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 模擬信號調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, QCC32
封裝： 0.50 MM PITCH, ROHS COMPLIANT, VFQFPN-32
文件頁數(shù)： 19/39頁
文件大小： 485K
代理商： 9TCS1085NLGI
9TCS1085
MOBILE ACCESS—CLOCK SYNTHESIZER, TEMPERATURE SENSOR, & PWM FAN CONTROLLER FOR PORTABLE DEVICES
IDT MOBILE ACCESS—CLOCK SYNTHESIZER, TEMPERATURE SENSOR, & PWM FAN CONTROLLER FOR PORTABLE DEVICES
26
9TCS1085
REV 0.5 100511
When the thermal sensor is used in a noisy environment, a capacitor can be connected across DXP and DXN to provide
some noise filtering capabilities. However, large capacitances affect the accuracy of the temperature measurement. A
maximum capacitance of 300pF can be used to help mitigate the noise.
Thermal Diode Fault Conditions
9TCS1085 has the ability to detect an open or a short condition for each temperature sensor diode. An external diode fault
is defined as one of the following:
An open between DXP and DXN
A short from VDD to DXP
A short from VDD to DXN
The diode fault monitoring is enabled at the start of every temperature measurement. When an external diode fault is
detected, the ALERT# pin asserts and the temperature data reads 00h in the MSB and LSB of the corresponding
temperature registers:
DX1 MSB - byte[17], bit[2:0]
DX1 LSB - byte[16], bit[7:0]
During the fault condition, byte[13], bit[1] or bit[0], will be set depending on the channel that has the fault. Bit[1] corresponds
to DX1, and furthermore, an open/short fault flag will be set in register byte[14], bit[4].
DXP
DXN
PNP
transistor
i.e. to CPU
DXP
DXN
PNP
transistor
i.e. 2N3906
DXP
DXN
NPN
transister
i.e. 2N3904
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