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参数资料
| 型号： | MC33493MOD315 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 4/22页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR MC33493 TX |
| 标准包装： | 1 |
| 类型： | 发射器 |
| 适用于相关产品： | MC33493 315MHz 射频模块 |
| 所含物品： | 模块和其他硬件 |
Transmitter Functional Description
1
Transmitter Functional Description
MC33493 is a PLL-tuned low-power UHF transmitter. The different modes of operation are controlled by the microcontroller
through several digital input pins. The power supply voltage ranges from 1.9 V to 3.6 V, allowing operation with a single lithium
cell.
2
Phase Locked Loop and Local Oscillator
The VCO is a completely integrated relaxation oscillator. The phase frequency detector (PFD) and the loop filter are fully
integrated. The exact output frequency is equal to: f RFOUT = f XTAL × [PLL divider ratio]. The frequency band of operation is
selected through the BAND pin.
Table 3 shows details for each frequency band selection.
Table 3. Band Selection and Associated Divider Ratios
BAND Input Level
High
Low
Frequency Band
(MHz)
315
434
868
PLL Divider Ratio
32
64
Crystal Oscillator
Frequency (MHz)
9.84
13.56
An out-of-lock function is performed by monitoring the PFD output voltage. When it exceeds defined limits, the RF output stage
is disabled.
3
Radio Frequency (RF) Output Stage
The radio frequentcy (RF) output stage source is a single-ended square-wave switched current. Harmonics are present in the
output current drive. Their radiated absolute level depends on the antenna characteristics and output power. Typical application
demonstrates compliance to ETSI standard.
A resistor, R ext , connected to the REXT pin controls the output power allowing a trade-off between radiated power and current
consumption.
The output voltage is internally clamped to V cc ± 2 V be (typ. V cc ± 1.5 V @ T A =25 ° C).
4
Modulation
To select the On Off Keying (OOK) modulation, a low-logic level must be applied on the MODE pin. This modulation is
performed by switching the RF output stage on or off. The logic level applied on the DATA pin controls the output stage state:
DATA = 0 → output stage off,
DATA = 1 → output stage on.
Applying a high-logic level on the MODE pin selects Frequency Shift Keying (FSK) modulation. This modulation is achieved
by crystal pulling. An internal switch connected to the CFSK pin enables switching the external crystal load capacitors. Figure 2
shows the possible configurations: serial and parallel.
The logic level applied on pin DATA controls the state of this internal switch:
DATA=0 → switch off,
DATA=1 → switch on.
DATA input is internally re-synchronized by the crystal reference signal. The corresponding jitter on the data duty cycle cannot
exceed ± 1 reference period ( ± 75 ns for a 13.56 MHz crystal).
This crystal pulling solution implies that the RF output frequency deviation equals the crystal frequency deviation multiplied
by the PLL Divider ratio (see Table 3 ).
PLL Tuned UHF Transmitter for Data Transfer Applications, Rev. 1.7
4
Freescale Semiconductor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33493MOD315EV | 功能描述:开发板和工具包 - 无线 MC33493 (TANGO3) RF EVAL RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V |
| MC33493MOD434 | 功能描述:BOARD EVALUATION FOR MC33493 TX RoHS:否 类别:RF/IF 和 RFID >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:用于 200/300 系列的欧盟开发套件 适用于相关产品:Zensys RF 模块 所含物品:开发板，模块，编程器，软件，线缆，电源 其它名称:703-1019Q3225667 |
| MC33493MOD434EV | 功能描述:开发板和工具包 - 无线 MC33493 (TANGO3) RF EVAL RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V |
| MC33493MOD868EV | 功能描述:开发板和工具包 - 无线 MC33493 (TANGO3) RF EVAL RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V |
| MC3350-041-91 | 制造商:SPC Multicomp 功能描述:ROCKER SWITCH DPDT CTR OFF 制造商:SPC Multicomp 功能描述:ROCKER SWITCH, DPDT, CTR OFF 制造商:SPC Multicomp 功能描述:SWITCH, ROCKER, DPDT, 15A, 250V, BLACK; Contact Configuration:DPDT; Switch Operation:On-Off-On; Contact Current Max:10A; Contact Voltage AC Nom:250V; Contact Voltage DC Nom:250V; Switch Mounting:Panel; Actuator / Cap Color:Black ;RoHS Compliant: Yes |
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