MB1507 datasheet(7/14 Pages) FUJITSU

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MB1507 Datasheet(PDF) 7 Page - Fujitsu Component Limited.

Part #	MB1507

Description	SERIAL INPUT PLL FREQUENCY SYNTHESIZER

Download	14 Pages

Scroll/Zoom	100%

Manufacturer	FUJITSU [Fujitsu Component Limited.]

Direct Link	http://edevice.fujitsu.com/fmd/en/index.html

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7 / 14 page

MB1507

PHASE DETECTOR OUTPUT WAVEFORM (FC=High)

NOTES: Phase difference detection range: –2

π 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.

fr>fp

fr=fp

fr<fp

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.

H(Changing the divide ratio of internal prescaler)

L(Normal operating mode)

Analog Switch

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

LPF-1

LPF-2

VCO

ANALOG SW

(CONTROL SIGNAL LE)

BISW

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