MC33493MOD434 Freescale Semiconductor, MC33493MOD434 Datasheet - Page 14

• Manufacturer Part Number: MC33493MOD434
• Description: BOARD EVALUATION FOR MC33493 TX
• Manufacturer: Freescale Semiconductor
• Type: Transmitterr

Specifications of MC33493MOD434

• Contents: Module and Misc Hardware
• For Use With/related Products: MC33493 434 MHz RF Module
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Complete Application Schematic and PCB for OOK Modulation
Figure 11
The 50 Ω matching network used for the 868 MHz band is similar to the 434 MHz, excepting components values: L1 is changed
to 8.2 nH and C3 to 470 pF in
configuration.
12
Figure 12
f
14
carrier
Level (dBm)
RFOUT
= 433.92 MHz. The C
shows the output power versus the R
shows a complete application schematic using a MC68HC908RK2 microcontroller. OOK modulation is selected,
Complete Application Schematic and PCB for OOK
Modulation
-2
-4
-6
8
6
4
2
0
6
Output power measurement in typical conditions (434MHz - Vcc=3V - 25°C)
PLL Tuned UHF Transmitter for Data Transfer Applications, Rev. 1.7
2
Figure 11. Output Power at 434 MHz Band vs R
Figure
to C
9
5
capacitors can be removed if switch debounce is done by software.
11. The typical gain of this 868 MHz matching network is 4 dB compared to unmatched
ext
resistor value with 50 Ω load and with matching network.
12
Output power on 50Ω Ω Ω Ω load (dBm)
Rext (kΩ Ω Ω Ω )
15
Output power when matched (dBm)
-0.35dB/kΩ Ω Ω Ω # -0.35mA/kΩ Ω Ω Ω
18
ext
Value
Freescale Semiconductor
REXT SPECIFIED RANGE
21
24