MB15U36 Datasheet, PDF (12/23 Pages) Fujitsu Component Limited. – Dual PLL Frequency Synthesizer with On-Chip Prescaler

MB15U36
Reference Information: MB15U36
Test Circuit
SG
OSC IN
fin
Do
fVCO = 1780 MHz VCC = VP = 3.0V
KV = 58 MHz/V
VVCO = 5.0V
fr = 200 KHz
Ta = +25 °C
LPF
fOSC = 10 MHz
CP: 1mA mode
LPF
3.3KΩ
Spectrum
Analyzer
VCO
750pF
6800Ω
6 8 0 0 pF
150pF
Typical plots measure with the test circuit are shown below. Each plot shows lock up time, phase noise, and reference leakage.
RF PLL Reference Leakage
@ 200 kHz offset = -80.3 dBc
RF PLL Phase Noise
@ max within loop band = -66.5 dBc/Hz
-80.3 dBc
RF PLL Lock Up Time = 442µs
(1760.000 MHz → 1800.000 MHz, within ± 1kHz)
RF PLL Lock Up Time = 387µs
(1800.000 MHz → 1760.000 MHz, within ± 1kHz)
Fujitsu Microelectronics, Inc. 13