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参数资料
| 型号： | MICRF505BML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 24/42页 |
| 文件大小： | 0K |
| 描述： | TXRX ISM 868-915MHZ 32-MLF |
| 标准包装： | 1,000 |
| 频率： | 850MHz ~ 950MHz |
| 数据传输率 - 最大： | 200kbps |
| 调制或协议： | FSK |
| 应用： | 遥测，无线控制器 |
| 功率 - 输出： | 10dBm |
| 灵敏度： | -111dBm |
| 电源电压： | 2.3 V ~ 5.5 V |
| 电流 - 接收： | 13.5mA |
| 电流 - 传输： | 28mA |
| 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-VFQFN 裸露焊盘，32-MLF? |
| 包装： | 带卷 (TR) |
| 其它名称： | MICRF505BMLTR MICRF505BMLTR-ND |
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Micrel
Transmitter
Power Amplifier
MICRF505
A6..A0
0000000
0000001
0000010
D7
LNA_by
Modulation1
CP_HI
D6
PA2
Modulation0
SC_by
D5
PA1
‘0’
‘0’
D4
PA0
‘0’
PA_By
D3
Sync_en
RSSI_en
OUTS3
D2
Mode1
LD_en
OUTS2
D1
Mode0
PF_FC1
OUTS1
D0
Load_en
PF_FC0
OUTS0
The maximum output power is approximately 10dBm
Frequency Modulation
for a 50 ? load. For maximum output power the load
seen by the PA must be resistive. Higher output
A6..A0
0000001
D7
Modulation1
D6
Modulation0
D5
‘0’
D4
‘0’
D3
RSSI_en
D2
LD_en
D1
PF_FC1
D0
PF_FC0
power can be obtained by decreasing the load
impedance. However, this will be in conflict with
obtaining impedance match in the LNA. The output
power is programmable in seven steps, with
approximately 3dB between each step. This is
controlled by bits PA2 – PA0.
The power amplifier can be turned off by setting PA2
– PA0 = 0.
Modulation1
0
0
1
1
Modulation0
0
1
0
1
Modulation Type
Closed loop modulation
using modulator
Not in use
FSK applied using two
sets of dividers
Not in use
and 3 harmonic of the PA
-40 ? C to +85 ? C. The 2
2 harmonic: <-20dBm
3 harmonic: <-26dBm
For all other combinations the PA is on and has
maximum power when PA2 – PA0 = 1.
The PA will be bypassed if PA_by=1. Output power
will drop ~15dB. It is still possible to control the
power by PA2 – PA0.
The output power varies about 3dB over power
supply 2.0V to 2.5V and about 2dB over temperature
nd rd
are as follows:
nd
rd
To reduce the emission of harmonics, an LC filter
can be added between the ANT pin and the antenna
as shown in Figure 15.
Table 11. Modulation Bit Setting
When Modulation1 and Modulation0 is 00, the
modulator needs to be programmed properly, see
“Modulator” section. The modulation signal will now
be applied directly on the phase locked VCO. It is
therefore important that the PLL bandwidth is not too
high, as this will remove the modulation. See “PLL
Filter” section on how to calculate the PLL
components. When using the modulator the
modulation signal is applied to the VCO and
therefore some sort of encoding is needed.
The level of encoding is determined by the PLL loop
filter bandwidth and data rate. Two of the most
common encoding techniques are Manchester
encoding and 3B4B. Other encoding schemes may
also be used.
Manchester encoding is when one bit is encoded in
to a two-bit word and is shown in Table 10. When
50ohm line
C6
L1
C5
50ohm line
C4
ANT
using Manchester encoding the maximum overhead
is 100%. When selecting PLL loop filter it is
important to note that the min baud rate is equal to:
2p2
8n7
8p2
3p3
f baud_min =
baud /s
4
Figure 15. LC Filter
f baud_min : The minimum frequency of the baud
rate [Hz]
baud/s: Elements per second (encoded data)
This filter is designed for the 915MHz band with 50 ?
terminations. The component values may have to be
tuned to compensate for the layout parasitics. This
Data
“0”
“1”
Word
“10”
“01”
filter may also increase the receiver selectivity.
Table 12. Manchester Encoding
October 2006
24
M9999-103106
+1 408-944-0800
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MICRF505DEV1 | 功能描述:射频开发工具 MICRF505 Evaluation Kit - For experimental use only RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| MICRF505DEV1 | 制造商:Micrel Inc 功能描述:KIT MICRF505 EVALUATION |
| MICRF505L | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:850MHz and 950MHz ISM Band Transceiver |
| MICRF505LYML | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MICRF505LYML TR | 功能描述:射频收发器 850MHz to 950MHz, 2.25V to 5.5V FSK Transceiver with +10dBm Power Amplifier RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray |
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