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MAX7030

Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL

Maxim Integrated 

Low-Cost, 315MHz, 345MHz, and 433.92MHz

ASK Transceiver with Fractional-N PLL

AC ELECTRICAL CHARACTERISTICS (continued)

(Typical Application Circuit, 50Ω system impedance, PAVDD = AVDD = DVDD = HVIN = +2.1V to +3.6V, fRF = 315MHz, 345MHz, or

433.92MHz, TA = -40°C to +125°C, unless otherwise noted. Typical values are at PAVDD = AVDD = DVDD = HVIN = +2.7V, TA = +25°C,

unless otherwise noted.) (Note 1)

PARAMETER

CRYSTAL OSCILLATOR

Crystal Frequency

Maximum Crystal Inductance

Frequency Pulling by VDD

Crystal Load Capacitance

SYMBOL

fXTAL

CONDITIONS

(Note 7)

MIN TYP MAX UNITS

(fRF -10.7)

/24

50

2

4.5

MHz

mH

ppm/V

pF

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

Note 2: 100% tested at TA = +125°C. Guaranteed by design and characterization overtemperature.

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

Note 4: Guaranteed by design and characterization. Not production tested.

Note 5: Time for final signal detection; does not include baseband filter settling.

Note 6: Efficiency = POUT/(VDD x IDD).

Note 7: Dependent on PCB trace capacitance.

Note 8: Input impedance is measured at the LNAIN pin. Note that the impedance at 315MHz includes the 12nH

inductive degeneration from the LNA source to ground. The impedance at 434MHz includes a 10nH induc-

tive degeneration connected from the LNA source to ground. The equivalent input circuit is 50Ω in series

with ~2.2pF. The voltage conversion is measured with the LNA input-matching inductor, the degeneration

inductor, and the LNA/mixer tank in place, and does not include the IF filter insertion loss.

Typical Operating Characteristics

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

0.2% BER, TA = +25°C, unless otherwise noted.)

RECEIVER

SUPPLY CURRENT vs. SUPPLY VOLTAGE

7.0

+125°C

6.8

6.6

+85°C

6.4

6.2

+25°C

6.0

-40°C

5.8

SUPPLY CURRENT vs. RF FREQUENCY

6.8

6.7

+125°C

6.6

6.5

+85°C

6.4

6.3

+25°C

6.2

6.1

-40°C

DEEP-SLEEP CURRENT vs. TEMPERATURE

18

16

14

VCC = +3.6V

12

VCC = +3.0V

10

VCC = +2.1V

8

6

4

2

5.6

2.1 2.4 2.7 3.0 3.3 3.6

SUPPLY VOLTAGE (V)

6.0

300 325 350 375 400 425 450

RF FREQUENCY (MHz)

0

-40 -15 -10 35 60 85 110

TEMPERATURE (°C)

_______________________________________________________________________________________ 5

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