MB1507 データシートの表示（PDF） - Fujitsu

部品番号

コンポーネント説明

メーカー

MB1507

SERIAL INPUT PLL FREQUENCY SYNTHESIZER

Fujitsu 

PHASE DETECTOR OUTPUT WAVEFORM (FC=High)

MB1507

fr

fP

LD

H

DO

fr>fp

Z

fr=fp

L

fr<fp

fr<fp

fr<fp

NOTES: Phase difference detection range: –2π to +2π

Spike appearance depends on charge pump characteristics. Also, the spike is output in order to diminish dead band.

When fr>fp or fr<fp, spike might not appear depending upon charge pump characteristics.

ANALOG SWITCH

ON/OFF of analog switch is controlled by LE input signal. When the analog switch is ON, internal charge pump output (DO) is connected to BISW pin.

When the analog switch is OFF, BI-SW pin is set to high-impedance state.

LE

H(Changing the divide ratio of internal prescaler)

Analog Switch

ON

L(Normal operating mode)

OFF

When an analog switch is inserted between LP1 and LP2, faster lock up time is achieved to reduce LPF time constant during PLL channel switching.

CHARGE PUMP

DO

LPF-1

LPF-2

VCO

ANALOG SW

(CONTROL SIGNAL LE)

BISW

7

Share Link: