MAX7031 datasheet(6/19 Pages) MAXIM

Part #	MAX7031

Description	Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL

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Manufacturer	MAXIM [Maxim Integrated Products]

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Low-Cost, 308MHz, 315MHz, and 433.92MHz

FSK Transceiver with Fractional-N PLL

6

_______________________________________________________________________________________

BIT-ERROR RATE

vs. AVERAGE INPUT POWER

AVERAGE INPUT POWER (dBm)

-108

-106

-110

-112

-114

0.1

1

10

100

0.01

-116

-104

280kHz IF BW

fRF = 434MHz

fRF = 315MHz

0.2% BER

SENSITIVITY vs. TEMPERATURE

TEMPERATURE (

°C)

110

85

60

35

10

-15

-110

-108

-106

-104

-102

-100

-112

-40

280kHz IF BW

0.2% BER

fRF = 434MHz

fRF = 315MHz

FREQUENCY DEVIATION (kHz)

10

-106

-104

-102

-100

-98

-96

-94

-108

1

100

SENSITIVITY vs. FREQUENCY DEVIATION

280kHz IF BW

0.2% BER

RSSI vs. RF INPUT POWER

RF INPUT POWER (dBm)

-10

-30

-70

-50

-90

-110

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0

-130

10

LOW-GAIN MODE

HIGH-GAIN MODE

AGC SWITCH

POINT

AGC HYSTERESIS: 3dB

RSSI AND DELTA vs. IF INPUT POWER

MAX7031 toc08

IF INPUT POWER (dBm)

-10

-30

-50

-70

0.3

0.6

0.9

1.2

1.5

1.8

2.1

0

-90

10

-2.5

-1.5

-0.5

0.5

1.5

2.5

3.5

-3.5

RSSI

DELTA

FSK DEMODULATOR OUTPUT

vs. IF FREQUENCY

IF FREQUENCY (MHz)

10.9

10.8

10.7

10.6

10.5

0.4

0.8

1.2

1.6

0

10.4

11.0

SYSTEM GAIN vs. IF FREQUENCY

IF FREQUENCY (MHz)

25

20

15

10

5

-10

0

10

20

30

40

50

-20

030

LOWER SIDEBAND

UPPER SIDEBAND

FROM RFIN

TO MIXOUT

fRF = 434MHz

45dB IMAGE

REJECTION

IMAGE REJECTION vs. TEMPERATURE

TEMPERATURE (

°C)

110

85

60

35

10

-15

44

46

48

42

-40

fRF = 434MHz

fRF = 315MHz

NORMALIZED IF GAIN vs. IF FREQUENCY

IF FREQUENCY (MHz)

10

-16

-12

-8

-4

0

-20

1

100

Typical Operating Characteristics (continued)

(Typical Operating Circuit, PAVDD = AVDD = DVDD = HVIN = +3.0V, fRF = 433.92MHz, IF BW = 280kHz. 4kbps Manchester

encoded, 0.2% BER deviation = ±50kHz, TA = +25°C, unless otherwise noted.)

RECEIVER

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Manufacturer	Part #	Datasheet	Description
Maxim Integrated Produc...	MAX7031	220Kb / 20P	Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL Rev 2; 6/09
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