LC72136N View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

View to exact match

LC72136N

PLL Frequency Synthesizer for Electronic Tuning

SANYO -> Panasonic 

LC72136N, 72136NM

IF Counter Structure

The LC72136N IF counter is a 20-bit binary counter. The result of the count can be read out serially, MSB first, from the

DO pin.

Measurement time

GT1

GT0

Measurement period (GT) (ms)

Wait time (tWU) (ms)

0

0

4

3 to 4

0

1

8

3 to 4

1

0

32

7 to 8

1

1

64

7 to 8

IF frequency (Fc) measurement consists of determining how many pulses enter the IF counter in a specified

measurement time (GT).

Fc =

C

GT

(C = Fc × GT)

C: count value (number of pulses)

Sample IF Counter Frequency Calculations

1. For a measurement time (GT) of 32 ms and a count value (C) of 53980 (hexadecimal), which is 342,400 (decimal)

IF frequency (Fc) = 342,400 ÷ 32 ms = 10.7 MHz

2. For a measurement time (GT) of 8 ms and a count value (C) of E10 (hexadecimal), which is 3600 (decimal)

IF frequency (Fc) = 3600 ÷ 8 ms = 450 kHz

No. 5608-16/23

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