MC68HC908RF2 Datasheet, PDF (245/254 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Preliminary Electrical Specifications
UHF Transmitter Module
V_CC
IMPEDER: TDK MMZ1608Y102CTA00
RFOUT
(a)
MATCHING
NETWORK
RF OUTPUT
50 Ω
MATCHING
NETWORK
330 pF
L₁
C₃
39 nH
(b)
50 Ω
3 kΩ
C₀
R₀
1.5 pF
250 Ω
RFOUT PIN
R_I
IMPEDER
R_L
LOAD
Figure 17-5. Ouput Characteristic and Matching Network for 434-MHz Frequency Band
OUTPUT POWER MEASUREMENT IN TYPICAL CONDITIONS
(434 MHz – V_CC = 3 V –25°C)
8
R_EXT SPECIFIED RANGE
6
OUTPUT POWER WHEN MATCHED (dBm)
4
–0.35 db/kΩ # –0.35 mA/kΩ
2
0
–2
–4
OUTPUT POWER ON 50 Ω LOAD (dBm)
–6
6
9
12
15
18
21
24
R_EXT (kΩ)
Figure 17-6. Output Power at 434-MHz Frequency Band versus R_EXT Value
MC68HC908RF2 — Rev. 1
MOTOROLA
Preliminary Electrical Specifications
Advance Information
245