MICRF218 データシートの表示（PDF） - Micrel

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コンポーネント説明

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MICRF218

3.3V, 315/433MHz Wide-IF Bandwidth ASK Receiver

Micrel 

Micrel

MICRF218

J4

IF BANDWIDTH 1

CONTROL

2

CON2

C1

NP

VDD = WIDE BANDWIDTH

0V = NARROW BANDWIDTH

J2

L4

C2

RF IN 100nH 2.2pF

L3

100nH

C3

33pF

L2

3.9nH

+3V

C5

100nF

Notes:

1. 0V = Common

2. VDD Input = 3.0 to 3.3V

3. Ref-Osc Control:

0V = 315 MHz Operation,

VDD = 390.1 MHz Operation

J3

3.0 to 3.3V 1

3.0 to 3.3V 2

COM 3

SHDN 4

DO 5

REF-OSC CNTR 6

COM 7

R3

NP

+3V

L3

ZCB-0603

NP = Not Placed

J1

1 EXTERNAL REFERENCE

2 OSCILLATOR INPUT

REFOSC

U1 MICRF218AYQS

1 RO1

RO2 16

2 GNDRF

NC 15

3 ANT

RSSI 14

4 GNDRF

CAGC 13

5 VDD

CTH 12

6 IF_BW

SEL1 11

7 SEL0

DO 10

8 SHDN

GND 9

JPR1

0 OHMS

JPR2

NP

C4

0.047µF

+3V

Y1

9.8131MHz

R1

NP

R2

NP

C5

4.7µF

TSDF1220W

Q1

R7

100k

R5

100K

C7

NP

DATA OUT

R4

0 OHMS

R8

10k

R10

100k

R6

10k

+3V

Y2

12.1287MHz

TSDF1220W

Q2

R11

100k

R9

10k

Figure 4. Dual Frequency QR218BP_SWREF, 315 MHz and 390 MHz

November 2011

11

M9999-111111

(408) 944-0800

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