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參數(shù)資料
| 型號(hào)： | STW81100ATR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | MULTI-BAND RF FREQUENCY SYNTHESIZER WITH INTEGRATED VCOS |
| 中文描述： | 多波段射頻頻率合成器帶有集成的VCO |
| 文件頁數(shù)： | 12/23頁 |
| 文件大?。?/td> | 915K |
| 代理商： | STW81100ATR |
STW81100
12/23
7.6 Lock Detect
This signal indicates that the difference between rising edges of both UP and DOWN PFD signals is found
to be shorter than the fixed delay (roughly 5 ns). Lock Detect signal is high when the PLL is locked.
When Power Down is activated, Lock Detect is let to high level (Lock Detect consumes current only during
PLL transients).
7.7 Change Pump
This block drives two matched current sources, Iup and Idown, which are controlled respectively by UP
and DOWN PFD outputs. The nominal value of the output current is controlled by an external resistor (to
be connected to the REXT input pin) and a selection among 8 by a 3 bit word.
The minimum value of the output current is: I
MIN
= 2*VBG/REXT (VBG~1.17 V)
Table 8. Current Value vs Selection
Note: The current is output on pin ICP. During the VCO auto calibration, ICP and VCTRL pins are forced to VDD/2.
Figure 15. Loop Filter Connection
CPSEL2
CPSEL1
CPSEL0
Current
Value for REXT=9.1 K
0
0
0
I
MIN
0.25 mA
0
0
1
2*I
MIN
0.50 mA
0
1
0
3*I
MIN
0.75 mA
0
1
1
4*I
MIN
1.00 mA
1
0
0
5*I
MIN
1.25 mA
1
0
1
6*I
MIN
1.50 mA
1
1
0
7*I
MIN
1.75 mA
1
1
1
8*I
MIN
2.00 mA
Charge
Pump
ICP
VCTRL
BUF
VDD
BUF
Cal bit
R1
C1
C3
R3
C2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STW81100ATR-1 | 功能描述:鎖相環(huán) - PLL MULTI BAND RF FREQ SYNTHESIZER RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| STW81101 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Multi-band RF frequency synthesizer with integrated VCOs |
| STW81101_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Multi-band RF frequency synthesizer with integrated VCOs |
| STW81101AT | 功能描述:鎖相環(huán) - PLL INTER-N FREQUENCY SYNTHESIZER RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| STW81101ATR | 功能描述:鎖相環(huán) - PLL WIRELESS INFRASTR. RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
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