- 您现在的位置：买卖IC网 > PDF目录18735 > MICRF505BML TR (Micrel Inc)TXRX ISM 868-915MHZ 32-MLF PDF资料下载
参数资料
| 型号： | MICRF505BML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 18/42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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页当前第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页
Micrel
MICRF505BML/YML
Charge Pump
A6..A0 D7 D6
0000010 CP_HI SC_by
D5
‘0’
D4
PA_by
D3
OUTS3
D2
OUTS2
D1
OUTS1
D0
OUTS1
Table 9 shows three different loop filters, the two first
for VCO modulation and the last one for modulation
using the internal dividers. The component values
are calculated with RF frequency = 915MHz, VCO
The charge pump current can be set to either 125μA
or 500μA by CP_HI (‘1’ → 500μA). This will affect
the loop filter component values, see “PLL Filter”
section. In most cases, the low current is best suited.
For applications using phase detector frequency and
gain = 67MHz/V and charge pump current = 125μA.
Other settings are shown in the table. The varactor
pin capacitance (pin 29) of 5pF does not influence
on the component values for the two filters with
lowest bandwidth.
high PLL bandwidth, the 500μA can be a better
choice.
PLL Filter
VCO
Baud Rate
(kbaud/sec)
>38.4
PLL
BW
(kHz)
0.8
Phase
Margin( ? )
56
Phase
Detector
Freq.
(kHz)
100
C1
10nF
C2 R1
100nF 6.2k ?
R2
0
C3
NC
The design of the PLL filter will strongly affect the
performance of the frequency synthesizer. The PLL
VCO
Divider
>125
<20
3.2
13
56
86
100
500
680pF
150pF
6.8nF
10nF
22k ?
18k ?
0
82k ?
NC
4.7pF
filter is kept externally for flexibility. Input parameters
when designing the loop filter for the MICRF505 are
mainly the modulation method and the bit rate.
Table 9. Loop Filter Components Values
These choices will also affect the switching time and
phase noise.
Lock Detect
A6..A0 D7
D6
D5
D4
D3
D2
D1
D0
The frequency modulation can be done in two
0000001
Modulation1
Modulation0
‘0’
‘0’
RSSI_en
LD_en
PF_FC1
PF_FC0
different ways with the MICRF505, either by VCO
modulation or by modulation with the internal
dividers (see chapter Frequency modulation for
further details). In the first case, the PLL needs to
lock on a new carrier frequency for every new data
A lock detector can be enabled by setting LD_en
= 1. When pin LD is high, it indicates that the
PLL is in lock.
bit. Now the PLL bandwidth needs to be adequately
high. It is recommended to use a third order filter to
suppress the phase detector frequency, as this is
not suppressed as much as when doing modulation
Modes of Operation
A6..A0 D7 D6 D5
0000000 LNA_by PA2 PA1
D4
PA0
D3
Sync_en
D2
Mode1
D1
Mode0
D0
Load_en
on the VCO with a lower bandwidth filter.
A schematic for a second (R2=0 and C3=NC) and
third order loop filter is shown in Figure 8.
Mode1
0
0
1
Mode0
0
1
0
State
Power down
Standby
Receive
Comments
Keeps register configuration
Only crystal oscillator running
Full receive
Pin 27
Pin 29
1
1
Transmit
Full transmit ex PA state
CP_OUT
C1
C2
R2
C3
VARIN
R1
Figure 8. Second and Third Order Loop Filter
October 2006
18
M9999-103106
+1 408-944-0800
相关PDF资料 |
PDF描述 |
|---|---|
| A-20GV21 | BASIC SWITCH |
| 7W-60.000MBB-T | OSC 60.000 MHZ 3.3V SMD |
| IXFX32N100P | MOSFET N-CH 1000V 32A PLUS247 |
| X09-019WNC | MOD RF 900MHZ 19.2K W/WIRE ANT |
| X09-019NSC-TX | MOD RF TX 900MHZ 19.2K W/RPSMA |
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 |
发布紧急采购，3分钟左右您将得到回复。