TH71082EDC データシートの表示（PDF） - Melexis Microelectronic Systems

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TH71082EDC

868/915MHz ASK Transmitter / LO Source

Melexis Microelectronic Systems  

Test Circuit

Fig. 2: Test circuit for ASK

with 50Ω matching network

TH71082

868/915MHz

ASK Transmitter / LO Source

OUT

C2

L2 C1 L1 C3

R2

R1

CX

RF1

XTAL

CF2 CF1

C4

12 3 12 12 12

Test circuit component list to Fig. 2

Part Size

Value

CF1

CF2

CX

C1

C2

C3

C4

L1

L2

RF1

R1

R2

XTAL

0603

0603

0603

0603

0603

0603

0805

0603

0603

0603

0603

0603

HC49/S

4.7 nF

56 pF

100 pF

100 pF

6.8 pF

330 pF

33 nF

270 nH

12 nH

1 kΩ

See output power

selection table

See output power

selection table

27.1344 MHz

fundamental wave

Tolerance

±10%

±10%

±10%

±5%

±5%

±10%

±10%

±5%

±5%

±10%

±10%

Description

loop filter capacitor

loop filter capacitor

XOSC capacitor

impedance matching capacitor

impedance matching capacitor

blocking capacitor

blocking capacitor

impedance matching inductor

impedance matching inductor

loop filter resistor

ASK power-select resistor, not requirement at CW mode

±10%

ASK or CW mode power-select resistor

±30ppm

calibration

±30ppm temp.

crystal, Cload = 12 pF to 15 pF, C0, max = 7 pF,

Rm, max = 40 Ω

3901071082

Rev. 005

Page 7 of 10

Data Sheet

Jan. 2002

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