FX631 查看數據表（PDF） - CML Microsystems Plc

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FX631

Low-Voltage SPM Detector

CML Microsystems Plc 

Application Information

External Components

VDD

C1

XTAL/CLOCK

XTAL/CLOCK

X1

1

For use with a Clock Pulse input

- Remove Xtal (X1)

XTAL

2

- Connect Pin 1 to VDD

- Remove link (Pins 3/4)

- Input clock pulses to CLOCK IN

CLOCK OUT

3

VSS

16

VDD

SYSTEM

15

PACKET MODE OUTPUT

14

CLOCK IN

CLOCK IN

TONE FOLLOWER OUTPUT

4

13

FX631DW

5

6

VBIAS

7

VSS 8

12

AMP OUT

11

SIGNAL IN (-)

10

SIGNAL IN (+)

9

R4

R1

C3

R2

R3

C4

C2

VSS

Fig.2 Recommended External Components - Differential Input Mode

Component

R1

R2

R3

R4

C1

C

2

C

3

C4

X1

Value

RFEEDBACK

RIN (-)

RIN (+)

RBIAS

1.0µF ±20%

1.0µF ±20%

C

IN (-)

CIN (+)

3.579545MHz

External Components

1. The values of the Input Amp gain components

illustrated are calculated using the Input Gain

Calculation Graphs (Figures 4 and 5).

Whilst calculating input gain components, for

correct operation, it is recommended that the values

of resistors R1 and R4 are always greater than, or

equal to, 33kΩ.

2. Refer to following pages for advice on Microcircuit

Protection from high and spurious line voltages.

Differential Input

Tip (a)

Ring (b)

INPUT AMP

-

+

Common Mode Input

INPUT AMP

-

+

VBIAS

VBIAS

VSS

Fig.3 Example Input Configurations

VSS

3

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