MAX1471 データシートの表示（PDF） - Maxim Integrated

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MAX1471

315MHz/434MHz Low-Power, 3V/5V ASK/FSK Superheterodyne Receiver

Maxim Integrated 

315MHz/434MHz Low-Power, 3V/5V

ASK/FSK Superheterodyne Receiver

Typical Operating Characteristics (continued)

(Typical Application Circuit, VAVDD = VDVDD = VHVIN = +3.0V, fRF = 434MHz, TA = +25°C, unless otherwise noted.)

RSSI AND DELTA vs. IF INPUT POWER

2.1

3.5 MAX1471 toc10

1.8

2.5

RSSI

1.5

1.5

1.2

0.5

0.9

-0.5

0.6

DELTA

-1.5

0.3

-2.5

0

-90

48

-70 -50 -30 -10

RF INPUT POWER (dBm)

IMAGE REJECTION

vs. TEMPERATURE

-3.5

10

fRF = 315MHz

46

44

fRF = 434MHz

42

FSK DEMODULATOR OUTPUT

vs. IF FREQUENCY

2.0

1.6

1.2

0.8

0.4

SYSTEM VOLTAGE GAIN

vs. IF FREQUENCY

60

UPPER SIDEBAND

50

40

30

45dB IMAGE

FROM RFIN

REJECTION

TO MIXOUT

20

fRF = 434MHz

10

LOWER SIDEBAND

0

0

10.4 10.5 10.6 10.7 10.8 10.9 11.0

IF FREQUENCY (MHz)

NORMALIZED IF GAIN

vs. IF FREQUENCY

5

-10

0

5 10 15 20 25 30

IF FREQUENCY (MHz)

S11 LOG-MAGNITUDE PLOT WITH

MATCHING NETWORK OF RFIN (434MHz)

0

10dB/

div

-5

0dB

0dB

-10

40

38

-40 -15

10 35 60 85 110

TEMPERATURE (°C)

-15

-20

1

434MHz

-16.4dB

10

100

START: 50MHz

IF FREQUENCY (MHz)

STOP: 1GHz

S11 SMITH CHART OF RFIN (434MHz)

MAX1471 toc16

500MHz

200MHz

6 _______________________________________________________________________________________

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