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參數(shù)資料
| 型號： | 9TCS1082NLGI |
| 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)： | 14/28頁 |
| 文件大?。?/td> | 376K |
| 代理商： | 9TCS1082NLGI |
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9TCS1082
MOBILE ACCESS—CLOCK SYNTHESIZER & TEMPERATURE SENSOR FOR PORTABLE DEVICES
SYNTHESIZERS
IDT MOBILE ACCESS—CLOCK SYNTHESIZER & TEMPERATURE SENSOR FOR PORTABLE DEVICES
21
9TCS1082
REV 0.4 100411
Thermal Sensor
The thermal sensor in the 9TCS1082 is a low power and highly accurate temperature sensor. It is optimized to operate
between 60°C to 100°C. There is one external thermal diode connection input and one internal diode temperature sensor.
There are diode faults and temperature alerts for the thermal sensor; Moreover, the thermal sensor has the capability to go
into standby mode for power savings.
The temperature sensor's analog to digital converter (ADC) has 11 bits of resolution. One LSB is equal to 0.125°C. The
accuracy of the temperature sensor is ±1°C between 60°C - 100°C for the two remote channels. For the local temperature
sensor, the accuracy is ±2°C for the same temperature range.
The 9TCS1082 temperature sensor has the ability to cancel the series resistance on the remote diode inputs. Parasitic
resistances to the DXP and DXN inputs seen in series with the remote diode are caused by PCB trace resistance along with
the overall length, bulk parasitic resistance in the remote temperature transistor junctions, and series resistance in the CPU.
This resistance appears as a temperature offset in the thermal sensor measurement and is approximately +0.7°C per Ohm.
The 9TCS1082 has the ability to cancel up to 100
Ω of series resistance.
The thermal sensor in 9TCS1082 outputs the measured temperature from a beta compensated temperature reading from
either an external or internal diode. The temperature sensor architecture uses an on-chip ADC as shown to convert the
analog temperature into an 11-bit digital code. Using averaging techniques along with the ADC architecture allows accurate
temperature measurements. The ability to have programmable conversion rates and adjustable averaging schemes allow
the user the flexibility to balance accuracy versus conversion speed per the system requirements.
The temperature measurement relies on the characteristics of a semiconductor junction operating at a fixed current level.
Forcing a fixed current through the temperature diodes and detecting the changes in VBE, the forward voltage of the diode,
the temperature proportionality can be determined.
External Thermal Diode Selection
The 9TCS1082 supports the following temperature diodes:
Typical remote substrate transistor (i.e. CPU substrate PNP intrinsic diode)
Discrete PNP transistor diode (i.e. 2N3906)
Discrete NPN transistor diode (i.e. 2N3904)
NPN 2N3904
Local Diode
Analog MUX
Channel 1
Local
Current Driver
BGP Ref
Temp Sensor
Dector
Timing Generator
11 bit ADC
Temperature Reg
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| 9TCS1083BNLG | 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| 9TCS1083BNLG8 | 制造商:Integrated Device Technology Inc 功能描述:Temp Sensor Digital Serial (I2C) 32-Pin VFQFPN T/R 制造商:Integrated Device Technology Inc 功能描述:PLL THERMAL SENSOR AND FAN CONTROLLER - Tape and Reel |
| 9TCS1085BNLG | 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| 9TCS1085BNLG8 | 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
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