MB54609 Datasheet, PDF (13/23 Pages) Fujitsu Component Limited. – Quadrature Modulator IC (With 1.0 GHz Up-converter)

MB54609
(Continued)
• RF output level dependent on temperature (PRF: test circuit 1, Modulation precision: test circuit 2)
@ Baseband signal of test circuit 2: π/4 DQPSK, 42 kbps, 1.0 Vpp, PN 15, Root-Nyquist filter α = 0.5
Input signals of test circuits 1 and 2: LO1 = 400 MHz, –15 dBm; LO2 = 750 MHz, –5 dBm
Output signals of test circuits 1 and 2: RFout = 950 MHz
0
P RF
–10
V CC = 3.3 V
V CC = 3.0 V
V CC = 2.7 V
–20
3
–30
V CC = 3.3 V ₂
V CC = 3.0 V
V ERR
V CC = 2.7 V
–40
1
0
–20
0
20
40
60
80
Temperature Ta (°C)
• Carrier suppression dependent on temperature (test circuit 2)
@ Baseband signal: π/4 DQPSK, 42 kbps, 1.0 Vpp, 0000, Root-Nyquist filter α = 0.5
Input signals: LO1 = 400 MHz, –15 dBm; LO2 = 750 MHz, –5 dBm
Output signal: RFout = 950 MHz
–20
–30
V CC = 3.3 V
V CC = 3.0 V
V CC = 2.7 V
–40
–50
–40
–20
0
20
40
60
80
Temperature Ta (°C)
(Continued)
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