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參數(shù)資料
| 型號(hào)： | MICRF112 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | QwikRadio㈢ UHF ASK/FSK Transmitter |
| 中文描述： | QwikRadio系列㈢超高頻ASK / FSK發(fā)射器 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 537K |
| 代理商： | MICRF112 |
Micrel, Inc.
MICRF112
Application Information
March 2007
14
M9999-030107
(408) 944-0800
Figure 6. ASK 433.92MHz and 315MHz
Note: Values in parenthesis are for 315MHz
The MICRF112 is well suited to drive a 50 ohms source,
monopole or a loop antenna. Figure 6 is an example of a
loop antenna configuration. Figure 6 also shows both
315MHz and 433.92MHz ASK configurations for a loop
antenna. Besides using a different crystal, Table 1 lists
modified values needed for the listed frequencies.
Frequency
(MHz)
315.0
433.92
L1
(nH)
470
680
C5
(pF)
10
10
L4
(nH)
150
82
C7
(pF)
6.8
4.7
Y1 (MHz)
9.84375
13.5600
Table 1
The reference design shown in Figure 6 has an antenna
optimized for using the matching network as described in
Table 1.
Power Control Using External Resistor
R7 is used to adjust the RF output levels which may be
needed to meet compliance. As an example, the
following tables list typical values of conducted RF
output levels and corresponding R7 resistor values for
the 50
test board shown in Figure 2. R7 of the TX112
Demo board using the loop antenna can be adjusted for
the appropriate radiated field allowed by FCC or ETSI
compliance. Contact Micrel for suggested values to meet
FCC and ETSI compliances.
R7,
0
75
100
500
1000
Output Power, dBm
10
8.5
8.0
1.6
-3.8
IDD, mA
6.7
6.3
6.2
4.13
4.87
Output Power Versus External Resistor at 315MHz
R7,
0
75
100
500
1000
Output Power, dBm
8.68
8.34
8.02
4.34
0.42
IDD, mA
7.5
7.33
7.3
6.3
5.5
Output Power Versus External Resistor at 433.92 MHz
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| MICRF112YMM10 | QwikRadio㈢ UHF ASK/FSK Transmitter |
| MICRF211 | 3V, QwikRadio㈢ 433.92 MHz Receiver |
| MICRF211AYQS | 3V, QwikRadio㈢ 433.92 MHz Receiver |
| MICRF213 | 1.8 V single UART, 20 Mbit/s (max.) with 128-byte FIFOs, infrared (IrDA), and XScale VLIO bus interface, SOT617-1 (HVQFN32), Tray Pack, Bakeable, Multiple |
| MICRF213AYQS | 1.8 V dual UART, 20 Mbit/s (max.) with 128-byte FIFOs, infrared (IrDA), and XScale VLIO bus interface, SOT912-1 (TFBGA36), Tray Pack, Bakeable, Multiple |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MICRF112_11 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:QwikRadio? UHF ASK/FSK Transmitter |
| MICRF112-315 EV | 制造商:Micrel Inc 功能描述:Evaluation board for MICRF112 |
| MICRF112-315-EV | 功能描述:EVAL BOARD FOR MICRF112 315MHZ 制造商:microchip technology 系列:QwikRadio? 零件狀態(tài):有效 類型:發(fā)射器 頻率:315MHz 配套使用產(chǎn)品/相關(guān)產(chǎn)品:MICRF112 所含物品:板 標(biāo)準(zhǔn)包裝:1 |
| MICRF112-433 EV | 功能描述:射頻開發(fā)工具 300 to 450MHz ASK/FSK +10dBm Transmitter Evaluation Board Tuned for 433MHz - Limit 2 per customer; marketing approval required for additional boards RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評(píng)估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
| MICRF112-433EV | 制造商:Micrel 功能描述:Evaluation Board for MICRF112-433 |
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