EVB71101B-433-FSK-C【PDF 10/14 页】EVALUATION BOARD TH71101 RECEIVR

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EVB71101

315/433MHz Receiver

Evaluation Board Description

2.2.2

Board Component Values for ASK

Part

C1

C3

C6

C7

C9

C10

C11

C16

Size

0805

0603

0603

0603

0603

0603

0603

0805

Value

@ 315 MHz

27 pF

1 nF

6.8 pF

2.7 pF

33 nF

1 nF

1 nF

1.5 nF

Value

@ 433.92 MHz

27 pF

1 nF

4.7 pF

2.2 pF

33 nF

1 nF

1 nF

1.5 nF

Tolerance

± 5%

± 10%

± 5%

± 5%

± 10%

± 10%

± 10%

± 10%

Description

crystal series capacitor

loop filter capacitor

LNA output tank capacitor

MIX1 input matching capacitor

IFA feedback capacitor

IFA feedback capacitor

IFA feedback capacitor

RSSI output low-pass capacitor,

this value for data rates < 10 kbps NRZ,

for higher data rates decrease the value

C17

0805

10 nF

10 nF

± 10%

data slicer capacitor,

this value for data rates > 0.8 kbps NRZ,

for lower data rates increase the value

CB1 to CB5

CB7 to CB8

CB6

C_RO

0603

0805

0603

330 pF

33 nF

330 pF

330 pF

33 nF

330 pF

± 10%

± 10%

± 5%

de-coupling capacitor

de-coupling capacitor

optional capacitor,

to couple external RO signal

R1

R2

R4

RL1

RL2

L1

L2

L3

0603

0603

0805

0805

0805

0603

0603

0603

10 k Ω

330 Ω

330 k Ω

470 Ω

470 Ω

0 Ω

33 nH

22 nH

10 k Ω

330 Ω

330 k Ω

470 Ω

470 Ω

68 nH

82 nH

15 nH

± 5%

± 5%

± 5%

± 5%

± 5%

± 5%

± 5%

± 5%

loop filter resistor

optional CERFIL output matching resistor

data slicer resistor

MIX1 bias resistor

MIX1 bias resistor

SAW filter matching inductor

from Würth-Elektronik (WE-KI series),

or equivalent part

LNA output tank inductor from Würth-Elek-

tronik (WE-KI series), or equivalent part

SMD

fundamental-mode crystal from

XTAL

6x3.5

HC49

SMD

20.35625 MHz

@ RF = 315 MHz

26.45125 MHz

@ RF = 433.92 MHz

± 25ppm cal.

± 30ppm temp.

Telcona/Horizon (HEX22 series)

or equivalent part

fundamental-mode crystal, C load = 10 pF

to 15 pF, C 0, max = 7 pF, R 1, max = 50 Ω l

SAFCC433MBL0X00

B 3dB = 840 kHz

low-loss SAW filters from Murata

SAWFIL

SMD

3x3

SAFDC315MSM0T00

(f 0 = 315.00 MHz)

(f 0 = 433.92 MHz)

B 3dB = 5MHz

or equivalent part

CERFIL

SMD

3.45x3.1

SFECF10M7HA00

B 3dB = 180 kHz

ceramic filter from Murata,

or equivalent part

39012 71101 01

Rev. 012

Page 10 of 14

EVB Description

April/08

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