MAX7042(2005) 查看數據表（PDF） - Maxim Integrated

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MAX7042
(Rev.:2005)

308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver

Maxim Integrated 

308MHz/315MHz/418MHz/433.92MHz

Low-Power, FSK Superheterodyne Receiver

AC ELECTRICAL CHARACTERISTICS (continued)

(Typical Application Circuit, 50Ω system impedance, AVDD = DVDD = HVIN = +2.4V to +3.6V, fRF = 308, 315, 418, and 433.92MHz;

TA = -40°C to +125°C, unless otherwise noted. Typical values are at AVDD = DVDD = HVIN = +3.0V, fRF = 433.92MHz,

PRFIN ≤ -80dBm, TA = +25°C, unless otherwise noted.)

PARAMETER

Operating Frequency

RSSI Slope

FSK DEMODULATOR

Conversion Gain

ANALOG BASEBAND

Maximum Peak-Detector Bandwidth

Maximum Data-Filter Bandwidth

Maximum Data-Slicer Bandwidth

Maximum Data Rate

CRYSTAL OSCILLATOR

SYMBOL

fIF

CONDITIONS

BWDF

BWDS

Manchester coded

NRZ

Crystal Frequency

fXTAL

Crystal Load Capacitance

MIN

TYP

MAX UNITS

10.7

MHz

10

16

21

mV/dB

1.1

2.1

3.0

mV/kHz

50

kHz

50

kHz

100

kHz

33

kHz

66

(fRF - 10.7)

/ 32

4.5

MHz

pF

Note 1: 0.2% BER, 4kbps, Manchester coded, 280kHz IF BW, ±50kHz frequency deviation.

Note 2: Input impedance is measured at the LNAIN pin 2x ILNA. Note that the impedance at 315MHz includes the 3.9nH inductive

degeneration from the LNA source to ground. The impedance at 433.92MHz includes a 0nH inductive degeneration con-

nected from the LNA source to ground. The equivalent input circuit is 47Ω in series with 3.2pF at 315MHz and 47Ω in series

with 3.5pF at 433.92MHz.

Note 3: The voltage conversion gain is measured with the LNA input matching inductor, the degeneration inductor, and the

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

Typical Operating Characteristics

(Typical Application Circuit, VDD = 3.0V, fRF = 433.92MHz, IF BW = 280kHz, data rate = 4kbps Manchester encoded, frequency

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

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(1x ILNA)

7.2

+125°C

7.0

6.8

+85°C

6.6

6.4

6.2

+25°C

6.0

5.8

5.6

-40°C

5.4

2.4

2.7

3.0

3.3

3.6

SUPPLY VOLTAGE (V)

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(2x ILNA)

8.0

7.8

+125°C

7.6

+85°C

7.4

7.2

7.0

6.8

+25°C

6.6

6.4

6.2

-40°C

6.0

2.4

2.7

3.0

3.3

3.6

SUPPLY VOLTAGE (V)

SUPPLY CURRENT vs. RF FREQUENCY

(1x ILNA)

7.0

6.8

6.6

+125°C

6.4

+85°C

+25°C

6.2

6.0

5.8

-40°C

5.6

300 325 350 375 400 425 450

RF FREQUENCY (MHz)

4 _______________________________________________________________________________________

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