參數(shù)資料
型號(hào): 9TCS1083NLGI8
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 模擬信號(hào)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): 20/39頁
文件大?。?/td> 491K
代理商: 9TCS1083NLGI8
9TCS1083
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
27
9TCS1083
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.
Temperature Sensor Channel Selection
To enable the temperature sensors, register byte[6], bit[7:5]. The default is the internal diode sensor. Bit[7] through bit[5]
corresponds to Channel 1 to Channel 3, the internal diode, respectively.
Thermal Diode Fault Conditions
9TCS1083 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]
DX2 MSB - byte[19], bit[2:0]
DX2 LSB - byte[18], 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 Bit[0] corresponds to DX2; 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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