MAX1479 datasheet(5/10 Pages) MAXIM

5 / 10 page

300MHz to 450MHz Low-Power,

Crystal-Based +10dBm ASK/FSK Transmitter

_______________________________________________________________________________________

OUTPUT POWER vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

3.3

3.0

2.7

2.4

2.1

3.6

fRF = 433MHz

PA ON

TA = +25

°C

TA = +125

°C

TA = +85

°C

TA = -40

°C

OUTPUT POWER vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

3.3

3.0

2.7

2.4

2.1

3.6

fRF = 315MHz

PA ON

ENVELOPE SHAPING

DISABLED

TA = +25

°C

TA = +125

°C

TA = +85

°C

TA = -40

°C

OUTPUT POWER vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

3.3

3.0

2.7

2.4

2.1

3.6

fRF = 433MHz

PA ON

ENVELOPE SHAPING

DISABLED

TA = +25

°C

TA = +125

°C

TA = +85

°C

TA = -40

°C

PHASE NOISE vs. OFFSET FREQUENCY

OFFSET FREQUENCY (Hz)

100k

10k

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-140

100

10M

fRF = 315MHz

fRF = 433MHz

CLOCK SPUR MAGNITUDE

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

3.3

3.0

2.7

2.4

-65

-60

-55

-50

-45

-40

-70

2.1

3.6

fRF = 315MHz

CLKOUT SPUR = fRF

± fCLKOUT

10pF LOAD CAPACITANCE

fCLKOUT = fXTAL/16

fCLKOUT = fXTAL/4

fCLKOUT = fXTAL/8

FREQUENCY STABILITY

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

3.3

3.0

2.7

2.4

-8

-6

-4

-2

-10

2.1

3.6

fRF = 315MHz

fRF = 433MHz

Typical Operating Characteristics (continued)

(

Typical Application Circuit, VDD = +2.7V, TA = +25°C, unless otherwise noted.)

OUTPUT POWER vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

3.3

3.0

2.7

2.4

2.1

3.6

fRF = 315MHz

PA ON

TA = +25

°C

TA = +125

°C

TA = +85

°C

TA = -40

°C

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