LC72131KMA View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LC72131KMA

CMOS IC PLL Frequency Synthesizer

SANYO -> Panasonic 

LC72131K, LC72131KMA

Programmable Divider Structure

FMIN

AMIN

(A)

1/2

4bits

Swallow

Counter

(C)

(B)

DVS SNS

12bits

Programmable

Divider

fvco/N

fref

PD E

fvco=frefN

DVS

SNS

(A)

1

*

(B)

1

1

(C)

0

0

*: Don't care

Input pin

FMIN

AMIN

AMIN

Set divisor

272 to 65535

272 to 65535

4 to 4095

Actual divisor: N

Twice the set value

The set value

The set value

Input frequency range

10 to 160MHz

2 to 40MHz

0.5 to 10MHz

Programmable Divider Calculation Examples

(1) FM, 50kHz steps (DVS=1, SNS=*: FMIN selected)

FM RF=90.0MHz (IF=+10.7MHz)

FM VCO=100.7MHz

PLL fref=25kHz (R0 to R1=1, R2 to R3=0)

100.7MHz (FMVCO)25kHz (fref) 2 (FMIN: divide-by-two prescaler) =201407DE (HEX)

E

D

7

0

0111101111100000 * 1

1100

(2) SW 5kHz steps (DVS=0, SNS=1: AMIN high-speed side selected)

SW RF=21.75MHz (IF=+450kHz)

SW VCO=22.20MHz

PLL fref=5kHz (R0=R2=0, R1=R3=1)

22.2MHz (SW VCO) 5kHz (fref) =44401158 (HEX)

8

5

1

1

000110101000100010

0101

(3) MW 10kHz steps (DVS=0, SNS=0: AMIN low-speed side selected)

MW RF=1000kHz (IF=+450kHz)

MW VCO=1450kHz

PLL fref=10kHz (R0 to R2=0, R3=1)

1450kHz (MW VCO) 10kHz (fref)=145091 (HEX)

1

9

0

* * * *10001001000000

0001

No.A0788-14/22

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