MAX7057ASE datasheet(3/19 Pages) MAXIM

Part #	MAX7057ASE

Description	300MHz to 450MHz Frequency-Programmable ASK/FSK Transmitter

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Manufacturer	MAXIM [Maxim Integrated Products]

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300MHz to 450MHz Frequency-Programmable

ASK/FSK Transmitter

_______________________________________________________________________________________

3

AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit, 50Ω system impedance, tuned for 315MHz to 433.92MHz operation, AVDD = DVDD = PAVDD = +2.1V to

+3.6V, fRF = 300MHz to 450MHz, fCRYSTAL = 16MHz, TA = -40°C to +125°C, unless otherwise noted. Typical values are at AVDD =

DVDD = PAVDD = +2.7V, TA = +25°C, unless otherwise noted. All min and max values are 100% tested at TA = +125°C, and guaran-

teed by design and characterization over temperature, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

GENERAL CHARACTERISTICS

Frequency Range

300

450

MHz

ENABLE transition low-to-high, frequency

settled to within 50kHz of the desired carrier

120

Power-On Time

tON

ENABLE transition low-to-high, frequency

settled to within 5kHz of the desired carrier

260

μs

Manchester encoded

50

ASK mode

Nonreturn-to-Zero

100

Manchester encoded

50

Maximum Data Rate

FSK mode

Nonreturn-to-Zero

100

kbps

Frequency Switching Time

Time from end of SPI write to frequency

settled to within 5kHz of desired carrier

70

μs

PHASE-LOCKED LOOP (PLL)

VCO Gain

KVCO

320

MHz/V

10kHz offset

-78

fRF = 315MHz

1MHz offset

-98

10kHz offset

-73

PLL Phase Noise

fRF = 433.92MHz

1MHz offset

-98

dBc/Hz

Loop Bandwidth

300

kHz

Reference Frequency Input Level

500

mVP-P

Frequency-Divider Range

19

28

Frequency Deviation (FSK)

±2

±100

kHz

CRYSTAL OSCILLATOR

Crystal Frequency

fXTAL

10.71

16

23.68

MHz

Frequency Pulling by VDD

4

ppm/V

Crystal Load Capacitance

(Note 4)

10

pF

POWER AMPLIFIER (PA)

TA = +25°C (Note 3)

3.8

9.2

16.4

TA = +125°C, AVDD = DVDD = PAVDD =

+2.1V

2.4

5.2

Output Power (Note 1)

POUT

TA = -40°C, AVDD = DVDD = PAVDD =

+3.6V (Note 3)

12.6

17.0

dBm

Modulation Depth

71

dB

fRF = 315MHz

-29

Maximum Carrier Harmonics

With output matching

network

fRF = 433.92MHz

-44

dBc

Reference Spur

-45

dBc

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