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| 型號(hào)： | OL2300NHN |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Fractional-N PLL based transmitter |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQCC16 |
| 封裝： | 3 X 3 MM, 0.85 MM HEIGHT, LEAD FREE, PLASTIC, MO-220, SOT758-1, VQFN-16 |
| 文件頁數(shù)： | 16/46頁 |
| 文件大小： | 951K |
| 代理商： | OL2300NHN |
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OL2300
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 2 — 28 October 2010
16 of 46
NXP Semiconductors
OL2300
Fractional-N PLL based transmitter
6.4.8
ENPF, enable power fail detection
If set, the built in power fail detection (brown out detection) is enabled. In this case the
PLL and the PA are switched off if the supply voltage at V
DD
is not sufficiently high to
guarantee proper operation of the line regulator. This also includes the proper function of
the PLL circuit.
Table 17.
ENPF
0
1
The power fail detection can be selected for fixed and adaptive modes. The detection
circuit is only active if transmission is active (the power amplifier must be enabled). It is
recommended to set ENPF before the power amplifier is activated to ensure that the PLL
is working properly but it is also possible to set ENPF if a transmission has already been
started. In the latter case there is no guarantee that the PLL will operate at the correct
frequency when the power amplifier is enabled.
Once the power fail detection has detected a voltage drop at V
DD
during transmission so
that the remaining supply voltage is not sufficient to keep the PLL in save operation the
PLLEN is immediately cleared, the power amplifier will be disabled and the transmission
will be stopped. The two control signals ENPF and ENRAD (if adaptive mode is used) will
stay enabled. The user must disable ENRAD before the next PLL activation otherwise a
proper start-up of the PLL cannot be guaranteed.
If ENXR was set to operate the crystal oscillator using the regulated supply while the
adaptive mode was active (ENRAD = 1), a power fail would instigate the crystal oscillator
supply to switch from regulated to unregulated mode (the PA would also be deactivated).
If the fixed mode was used a power-fail would not influence the supply to the oscillator.
Power fail enable signal (ENPF)
Power fail control state
power fail detection disabled
power fail detection enabled
Fig 12. TX start-up timing
001aak390
active
TX
enabled
SDIO
t
lat(det)
t
acq
t
s
t
set
transmit command
write
TXCON
register
init
ENRAD
ENPF
VREG
PLLEN
EN
V
DD
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| OL2300NHN/F,118 | 功能描述:鎖相環(huán) - PLL Fractional-N PLL Based Transmitter 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 |
| OL2311AHN/C0B,515 | 功能描述:射頻接收器 Single-chip sub 1GHz RF receiver RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| OL2381AHN/C0B,515 | 功能描述:射頻收發(fā)器 Single Chip 1-GHz 射頻收發(fā)器 RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| OL2381AHN/C0B515 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| OL2385AHN/00100Y | 功能描述:RF WIRELESS PLATFORM UHF 制造商:nxp usa inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:TxRx + MCU 射頻系列/標(biāo)準(zhǔn):- 協(xié)議:- 調(diào)制:ASK，F(xiàn)SK 數(shù)據(jù)速率（最大值）:- 功率 - 輸出:14dBm 靈敏度:-124dBm 存儲(chǔ)容量:- 串行接口:SPI，UART GPIO:12 電壓 - 電源:1.9 V ~ 5.5 V 電流 - 接收:- 電流 - 傳輸:29mA 工作溫度:-40°C ~ 85°C 封裝/外殼:48-VFQFN 裸露焊盤 標(biāo)準(zhǔn)包裝:1 |
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