300MHz to 450MHz Low-Power,

Crystal-Based +10dBm ASK/FSK Transmitter

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3

Note 1: Supply current, output power, and efficiency are greatly dependent on board layout and PAOUT match.

Note 3: 50% duty cycle at 10kHz ASK data (Manchester coded).

Note 4: Guaranteed by design and characterization, not production tested.

Note 6: Dependent on crystal and PCB trace capacitance.

Note 8: Dependent on PCB trace capacitance.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SYSTEM PERFORMANCE

Frequency Range

(Note 2)

300

450

MHz

Settle to within 50kHz

200

Turn-On Time (Note 5)

Settle to within 5kHz

350

µs

ASK mode (Manchester coded)

100

Maximum Data Rate (Note 4)

FSK mode (Manchester coded)

20

kbps

55

Maximum FSK Frequency

Deviation

DEV[2:0] = 111

(Note 6)

80

kHz

6.8

10

12.0

2.7

5.3

Output Power (Note 2)

12.2

16.1

dBm

35

Transmit Efficiency with CW Tone

(Note 7)

34

%

27

Transmit Efficiency at 50% Duty

Cycle

25

%

PHASE-LOCKED-LOOP PERFORMANCE

VCO Gain

280

MHz/V

-75

-98

-74

Phase Noise

-98

dBc/Hz

-50

Maximum Carrier Harmonics

-45

dBc

Reference Spur

-40

dBc

Loop Bandwidth

BW

300

kHz

Crystal Frequency Range

MHz

Crystal Tolerance

50

ppm

Crystal Load Capacitance

(Note 8)

4.5

pF

Clock Output Frequency

Determined by CLK0 and CLK1; see Table 1

MHz

AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit, all RF inputs and outputs are referenced to 50