参数资料
型号: MRF89XAT-I/MQ
厂商: Microchip Technology
文件页数: 20/140页
文件大小: 0K
描述: RF ISM BAND TXRX 32 QFN
标准包装: 1
频率: 863MHz ~ 870MHz,902MHz ~ 928MHz,950MHz ~ 960MHz
数据传输率 - 最大: 200kbps
调制或协议: FSK,OOK
应用: ISM
功率 - 输出: 12.5dBm
灵敏度: -113dBm
电源电压: 2.1 V ~ 3.6 V
电流 - 接收: 3mA
电流 - 传输: 25mA
数据接口: PCB,表面贴装
存储容量: *
天线连接器: PCB,表面贴装
工作温度: -40°C ~ 85°C
封装/外壳: 32-WFQFN 裸露焊盘
包装: 标准包装
其它名称: MRF89XAT-I/MQDKR
MRF89XA
2.9.1
TRANSMITTER ARCHITECTURE
In OOK mode, the phase difference between the I and
Figure 2-6 illustrates the transmitter architecture block
diagram. The baseband I and Q signals are digitally
generated by a DDS whose Digital-to-Analog
Converters (DAC) followed by two anti-aliasing low-
pass filters transform the digital signal into analog in-
phase (I) and quadrature (Q) components whose
frequency is the selected frequency deviation, is set
using the FDVAL<7:0> bits from FDEVREG<7:0>.
In FSK mode, the relative phase of I and Q is switched
by the input data between -90° and +90° with continu-
ous phase. The modulation is therefore performed at
this initial stage, because the information contained in
the phase difference will be converted into a frequency
shift when the I and Q signals are up-converted in the
first mixer stage. This first up-conversion stage is dupli-
cated to enhance image rejection. The FSK convention
is such that:
DATA = 1 → f rf + f dev
DATA = 0 → f rf – f dev
Q channels is kept constant (independent of the
transmitted data). Thus, the first stage of up-conversion
creates a fixed frequency signal at the low IF = f dev (this
explains why the transmitted OOK spectrum is offset by
f dev ). OOK Modulation is accomplished by switching the
PA and PA regulator stages ON and OFF. By
convention:
DATA = 1 → PAon
DATA = 0 → PAoff
After the interpolation filters, a set of four mixers
combines the I and Q signals and converts them into a
pair of complex signals at the second intermediate
frequency, equal to one-eighth of the LO frequency, or
one-ninth of the RF frequency. These two new I and Q
signals are then combined and up-converted to the
final RF frequency by two quadrature mixers fed by the
LO signal. The signal is pre-amplified, and then the
transmitter output is driven by a final power amplifier
stage. The I and Q signal details are illustrated in
Figure 2-7 .
FIGURE 2-7:
I(t), Q(t) Signals Overview
1
Fdev
I(t)
Q(t)
DS70622C-page 20
Preliminary
? 2010–2011 Microchip Technology Inc.
相关PDF资料
PDF描述
241-5-12L XFRMR PWR 115V 12.6VCT 1A LEADS
DPC-40-250 XFRMR PWR 115/230V 40VCT 250MA
ST-5-56 XFRMR PWR 115V 28V 440MA 12VA
6221 TIP STAIN-STEEL SHARP-PT .06"DMM
ST-5-48 XFRMR PWR 115V 24V 500MA 12VA
相关代理商/技术参数
参数描述
MRF8HP21080HR3 功能描述:射频MOSFET电源晶体管 HV8 2.1GHZ 160W NI780H-4 RoHS:否 制造商:Freescale Semiconductor 配置:Single 晶体管极性: 频率:1800 MHz to 2000 MHz 增益:27 dB 输出功率:100 W 汲极/源极击穿电压: 漏极连续电流: 闸/源击穿电压: 最大工作温度: 封装 / 箱体:NI-780-4 封装:Tray
MRF8HP21080HR5 功能描述:射频MOSFET电源晶体管 HV8 2.1GHZ 160W NI780H-4 RoHS:否 制造商:Freescale Semiconductor 配置:Single 晶体管极性: 频率:1800 MHz to 2000 MHz 增益:27 dB 输出功率:100 W 汲极/源极击穿电压: 漏极连续电流: 闸/源击穿电压: 最大工作温度: 封装 / 箱体:NI-780-4 封装:Tray
MRF8HP21080HSR3 功能描述:射频MOSFET电源晶体管 HV8 2.1GHZ 160W NI780S-4 RoHS:否 制造商:Freescale Semiconductor 配置:Single 晶体管极性: 频率:1800 MHz to 2000 MHz 增益:27 dB 输出功率:100 W 汲极/源极击穿电压: 漏极连续电流: 闸/源击穿电压: 最大工作温度: 封装 / 箱体:NI-780-4 封装:Tray
MRF8HP21080HSR5 功能描述:射频MOSFET电源晶体管 HV8 2.1GHZ 160W NI780S-4 RoHS:否 制造商:Freescale Semiconductor 配置:Single 晶体管极性: 频率:1800 MHz to 2000 MHz 增益:27 dB 输出功率:100 W 汲极/源极击穿电压: 漏极连续电流: 闸/源击穿电压: 最大工作温度: 封装 / 箱体:NI-780-4 封装:Tray
MRF8HP21130HR3 功能描述:射频MOSFET电源晶体管 HV8 2.1GHZ 130W NI780-4 RoHS:否 制造商:Freescale Semiconductor 配置:Single 晶体管极性: 频率:1800 MHz to 2000 MHz 增益:27 dB 输出功率:100 W 汲极/源极击穿电压: 漏极连续电流: 闸/源击穿电压: 最大工作温度: 封装 / 箱体:NI-780-4 封装:Tray