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參數(shù)資料
| 型號： | OL2381AHN |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 微波射頻器件 |
| 英文描述： | Highly Integrated Single Chip Sub 1-GHz RF Transceiver |
| 封裝： | OL2381AHN<SOT617-3 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-3.html<1<Always Pb-free,; |
| 文件頁數(shù)： | 26/43頁 |
| 文件大?。?/td> | 2978K |
| 代理商： | OL2381AHN |
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AN11017
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Application note
Rev. 2 — 10 May 2011
26 of 43
NXP Semiconductors
AN11017
Transceiver OL2381 using wireless M-BUS
6.2 Channel bandwidth configuration
Register RXBW sets the demodulation choice (ASK/FSK) and channel filter (IF)
bandwidth. If FSK modulation is used, bit DEMOD_ASK is set to logic 0.
To optimize receiver performance, the bandwidth is chosen carefully. It must be close to
the bandwidth occupied by the modulated signal including the center frequency
tolerances of transmitter and receiver.
The center frequency tolerances are mainly dependent on the crystal used in the receiver
and transmitter. This is not calculated in the following example.
RSSI_FILTER_FC is set to 5 which means that the RSSI value is filtered so that the
bandwidth value is more stable.
Table 25.
M-Bus radio link
BW
≥
2
×
(f
dev
+ f
mod
) (as a rule of thumb, crystal tolerance is not considered).
Where:
f
dev
= maximum displayed frequency deviation.
f
mod
= maximum displayed modulation frequency.
If higher bandwidth is required, set register EXPERT2 (0x33 bank 1) to 0xC2.
Table 26.
M-Bus radio link
Fig 30. Register RXBW
M-Bus channel bandwidth register settings
OL2381 register address
RXBW (0x22)
0x15
0x05
0x55
Information
S
T, C
R, F
f
dev
= 80 kHz, f
mod
= 16.6 kHz
→
BW = 200 kHz
f
dev
= 80 kHz, f
mod
= 55 kHz
→
BW = 300 kHz
f
dev
= 7.2 kHz, f
mod
= 2.4 kHz
→
BW = 50 kHz
M-Bus channel register settings for EXPERT2 register
OL2381 register address
EXPERT2 (0x33 bank 1)
0xc2
0x02
Information
S, T, C
R, F
set bit 6 and bit 7 for BW > 200 kHz
default
019aab782
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|---|---|
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| 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: |
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| OL2385AHN/001A0Y | 功能描述:LOW-POWER MULTI-CHANNEL UHF RF W 制造商:nxp usa inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 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 |
| OL2405 | 制造商:Ohmite Mfg Co 功能描述: |
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