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参数资料
| 型号： | MRF89XA-I/MQ |
| 厂商： | Microchip Technology |
| 文件页数： | 58/140页 |
| 文件大小： | 0K |
| 描述： | TXRX ISM SUB-GHZ ULP 32QFN |
| 标准包装： | 73 |
| 系列： | * |
| 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 |
| 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： | 托盘 |
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MRF89XA
TABLE 3-1:
FREQUENCY BAND SETTING
FSK Mode
f rf , fsk = --- f lo
Target Channel
(MHz)
863-870
902-915
915-928
950-960
FBS1
1
0
0
1
FBS0
0
0
1
0
The formula provided in Equation 3-1 gives the
relationship between the local oscillator, and R, P and
S values, when using FSK modulation.
EQUATION 3-1:
9
8
f rf , fsk = --- × ------------- [ 75 ? ( P + 1 ) + S ]
3.2.6.1
Trimming the VCO
Hardware and Software
Tank
by
9 f xtaL
8 R + 1
To ensure that the frequency band of operation may be
f rf , ook , tx = --- × f lo – f dev
= --- × ------------- [ 75 ? ( P + 1 ) + S ] – f dev
f rf , ook , tx
f rf , ook , rx = --- × f lo – IF 2
f rf , ook , rx = --- × ------------- [ 75 ? ( P + 1 ) + S ] – IF 2
accurately addressed by the R, P, and S dividers of the
synthesizer, it is necessary to ensure that the VCO is
correctly centered. The MRF89XA built-in VCO
trimming feature makes it easy and is controlled by the
SPI interface. This tuning does not require any RF test
equipment, and can be achieved by measuring Vtune,
the voltage between the PLLN and PLLP pins (6 and 7
pins).
The VCO is centered if the voltage is within the range
of 50 ≤ Vtune(mV) ≤ 150.
This measurement should be conducted when in
Transmit mode at the center frequency (fo) of the
desired band (for example, approximately 867 MHz in
the 863-870 MHz band), with the appropriate frequency
band setting using the (FBS<1:0> bits
(GCONREG<4:3>).
If this inequality is not satisfied, adjust the VCOT<1:0>
bits (GCONREG<2:0>) from ‘ 00 ’ by monitoring Vtune.
This allows the VCO voltage to be trimmed in +60 mV
increments. If the desired voltage range is
inaccessible, the voltage may be adjusted further by
changing the tank circuit inductance value.
An increase in inductance results in an increase Vtune.
In addition, for mass production, the VCO capacitance
is piece-to-piece dependant. As such, the optimization
proposed above should be verified on several
prototypes, to ensure that the population is centered
with 100 mV.
The register associated with VCO is:
? GCONREG ( Register 2-1 ).
3.2.7 FREQUENCY CALCULATION
As illustrated in Figure 2-5 , the PLL structure com-
prises three different dividers, R, P, and S, which set
the output frequency through the LO. A second set of
3.2.8 FSK MODE REGISTERS
The registers associated with FSK mode are:
? GCONREG ( Register 2-1 )
? DMODREG ( Register 2-2 ).
OOK Mode
Due to the manner in which the baseband OOK
symbols are generated, the signal is always offset by
the FSK frequency deviation (FDVAL<7:0> as
programmed in FDEVREG<7:0>). Therefore, the
center of the transmitted OOK signal is represented by
Equation 3-2 .
EQUATION 3-2:
9
8
9 f xtaL
8 R + 1
Consequently, in Receive mode, due to the low
intermediate frequency (Low-IF) architecture of the
MRF89XA, the frequency should be configured so as to
ensure the correct low-IF receiver baseband center
frequency, IF2, as shown in Equation 3-3 .
EQUATION 3-3:
9
8
9 f xtaL
8 R + 1
As described in Section 3.4.4, Channel Filters , it is
recommended that IF2 be set to 100 kHz.
dividers is also available to allow rapid switching
between a pair of frequencies: R1/P1/S1 and R2/P2/
3.2.9
OOK MODE REGISTERS
S2. These six dividers are programmed by six indepen-
dent registers (see Register 2-7 through Register 2-
12 ), which are selected by GCONREG.
The registers associated with OOK mode are:
? GCONREG ( Register 2-1 )
? DMODREG ( Register 2-2 )
?
?
FLTHREG ( Register 2-5 )
OOKCREG ( Register 2-22 )
DS70622C-page 58
Preliminary
? 2010–2011 Microchip Technology Inc.
相关PDF资料 |
PDF描述 |
|---|---|
| MRF89XAM9A-I/RM | IC TXRX MOD 915MHZ ULP SUB-GHZ |
| MRX-001-433DR-B | MODULE RECEIVER 433MHZ 18DIP |
| MRX-002-433DR-B | MODULE RECEIVER 433MHZ 18DIP |
| MRX-002SL-433DR-B | MODULE RCVR 433MHZ SAW LN 24DIP |
| MRX-005-915DR-B | MODULE RECEIVER 915MHZ 18DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MRF89XAM8A-I | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Ultra Low-Power, Integrated ISM Band Sub-GHz Transceiver |
| MRF89XAM8A-I/RM | 功能描述:射频模块 868MHz Sub-GHz transceiver module RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm |
| MRF89XAM8A-I/RM | 制造商:Microchip Technology Inc 功能描述:, Leaded Process Compatible:Yes, Peak Re |
| MRF89XAM9A_12 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:915 MHz Ultra Low-Power Sub-GHz Transceiver Module |
| MRF89XAM9A-I/RM | 功能描述:射频模块 915MHz Sub-GHz Transceiver Mod RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm |
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