MAX7044(2004) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX7044
(Rev.:2004)

300MHz to 450MHz High-Efficiency, Crystal-Based +13dBm ASK Transmitter

Maxim Integrated 

300MHz to 450MHz High-Efficiency,

Crystal-Based +13dBm ASK Transmitter

ELECTRICAL CHARACTERISTICS (continued)

(Typical Application Circuit, all RF inputs and outputs are referenced to 50Ω, VDD = +2.1V to +3.6V, TA = -40°C to +125°C, unless

otherwise noted. Typical values are at VDD = +2.7V, TA = +25°C, unless otherwise noted.) (Note 1)

PARAMETER

PHASE-LOCKED LOOP (PLL)

VCO Gain

Phase Noise

Maximum Carrier Harmonics

Reference Spur

Loop Bandwidth

Crystal Frequency

Frequency Pulling by VDD

Maximum Crystal Inductance

Crystal Load Capacitance

DATA INPUT

SYMBOL

CONDITIONS

fRF = 315MHz

fRF = 433MHz

fRF = 315MHz

fRF = 433MHz

fRF = 315MHz

fRF = 433MHz

fXTAL

fOFFSET = 100kHz

fOFFSET = 1MHz

fOFFSET = 100kHz

fOFFSET = 1MHz

MIN TYP MAX UNITS

330

-80

-90

-77

-87

-50

-50

-74

-80

1.6

fRF/32

3

50

3

MHz/V

dBc/Hz

dBc

dBc

MHz

MHz

ppm/V

µH

pF

Data Input High

VIH

VDD -

V

0.25

Data Input Low

Maximum Input Current

Pulldown Current

CLKOUT OUTPUT

Output Voltage Low

VIL

VOL

ISINK = 650µA (Note 4)

0.25

V

10

µA

10

µA

0.25

V

Output Voltage High

VOH

ISOURCE = 350µA (Note 4)

VDD -

0.25

V

Load Capacitance

CLKOUT Frequency

CLOAD (Note 4)

10

pF

fXTAL /

Hz

16

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

Note 2: Production tested at TA = +25°C with fRF = 300MHz and 450MHz. Guaranteed by design and characterization over tem-

perature and frequency.

Note 3: 50% duty cycle at 10kbps with Manchester coding.

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

Note 5: PA output is turned on in test mode by VDATA = VCC/2 + 100mV.

Note 6: PA output is turned off in test mode by VDATA = VCC/2 – 100mV.

Note 7: Wait time: tWAIT = (216 x 32) / fRF.

Note 8: Generally limited by PC board layout.

Note 9: VDATA = VIL to VDATA = VIH after VDATA = VIL for WAIT time: tWAIT = (216 x 32) / fRF.

Note 10: VDATA = VIH. Efficiency = POUT/(VDD x IDD).

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