Rainbow-electronics MAX19995 Manual do Utilizador descarregar pdf (Página 18)

MAX19995

Dual, SiGe, High-Linearity, 1700MHz to 2200MHz

Downconversion Mixer with LO Buffer/Switch

18 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(

Typical Application Circuit

, optimized for the UMTS band, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, V

= +5.0V, P

= 0dBm,

= -5dBm, LO is low-side injected for a 190MHz IF, T

= +25°C, unless otherwise noted.)

RF PORT RETURN LOSS

vs. RF FREQUENCY

MAX19995 toc85

RF FREQUENCY (MHz)

RF PORT RETURN LOSS (dB)

23001900 2100

1700 2500

= -3dBm, 0dBm, +3dBm

= 190MHz

IF PORT RETURN LOSS

vs. IF FREQUENCY

MAX19995 toc86

IF FREQUENCY (MHz)

IF PORT RETURN LOSS (dB)

410140 230 320

50 500

= 1610MHz

= 4.75V, 5.0V, 5.25V

LO SELECTED RETURN LOSS

vs. LO FREQUENCY

MAX19995 toc87

LO FREQUENCY (MHz)

LO SELECTED RETURN LOSS (dB)

22001600 1800 2000

1400 2400

= -3dBm

= 0dBm

= +3dBm

LO UNSELECTED RETURN LOSS

vs. LO FREQUENCY

MAX19995 toc88

LO FREQUENCY (MHz)

LO UN SELECTED RETURN LOSS (dB)

2200 24001600 1800 2000

1400

= -3dBm, 0dBm, +3dBm

SUPPLY CURRENT

vs. TEMPERATURE (T

)

MAX19995 toc89

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

65 85-15 5 25 45

360

380

400

320

340

-35

= 5.25V

= 4.75V

= 5.0V

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 28 29

MAX19995 1

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