MAX7031 データシートの表示（PDF） - Maxim Integrated

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MAX7031

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL

Maxim Integrated 

Low-Cost, 308MHz, 315MHz, and 433.92MHz

FSK Transceiver with Fractional-N PLL

AC ELECTRICAL CHARACTERISTICS (continued)

(Typical Application Circuit, 50Ω system impedance, VPAVDD = VAVDD = VDVDD = VHVIN = +2.1V to +3.6V, fRF = 308MHz, 315MHz. or

433.92MHz, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VPAVDD = VAVDD = VDVDD = VHVIN = +2.7V,

TA = +25°C, unless otherwise noted.) (Note 1)

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 over temperature.

Note 3: Guaranteed by design and characterization. Not production tested.

Note 4: Time for final signal detection; does not include baseband filter settling.

Note 5: Efficiency = POUT/(VDD x IDD).

Note 6: Dependent on PCB trace capacitance.

Note 7: Input impedance is measured at the LNAIN pin. Note that the impedance at 315MHz includes the 12nH inductive degenera-

tion from the LNA source to ground. The impedance at 434MHz includes a 10nH inductive 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 Operating Circuit, VPAVDD = VAVDD = VDVDD = VHVIN = +3.0V, fRF = 433.92MHz, IF BW = 280kHz. 4kbps Manchester

encoded, 0.2% BER deviation = ±50kHz, TA = +25°C, unless otherwise noted.)

RECEIVER

SUPPLY CURRENT vs. SUPPLY VOLTAGE

7.4

+125°C

7.2

7.0

+85°C

6.8

6.6

+25°C

6.4

-40°C

6.2

6.0

2.1 2.4 2.7 3.0 3.3 3.6

SUPPLY VOLTAGE (V)

SUPPLY CURRENT vs. RF FREQUENCY

FSK MODE

7.0

6.9

+125°C

6.8

+85°C

6.7

6.6

6.5

+25°C

-40°C

6.4

300 325 350 375 400 425 450

RF FREQUENCY (MHz)

DEEP-SLEEP CURRENT vs. TEMPERATURE

18

16

14

VCC = +3.6V

12

VCC = +3.0V

10

VCC = +2.1V

8

6

4

2

0

-40 -15 -10 35 60 85 110

TEMPERATURE (°C)

_______________________________________________________________________________________ 5

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