Rainbow-electronics MAX2374 Manual do Utilizador descarregar pdf (Página 4)

MAX2374

SiGe, Variable IIP3, Low-Noise Amplifier

in UCSP Package

4 _______________________________________________________________________________________

1.0

2.0

1.5

3.0

2.5

4.0

3.5

4.5

750 850800 900 950 1000

NOISE FIGURE vs. FREQUENCY

MAX2374-07

FREQUENCY (MHz)

NOISE FIGURE (dB)

= 2.75V

GAIN = V

2.5 4.03.0 3.5 4.5 5.0 5.5

CURRENT vs. VOLTAGE AND R

BIAS

MAX2374-08

(V)

BIAS

= 20kΩ, GAIN = V

BIAS

= 20kΩ, GAIN = GND

BIAS

= 10kΩ, GAIN = V

BIAS

= 10kΩ, GAIN = GND

BIAS

= 43kΩ, GAIN = GND

BIAS

= 43kΩ, GAIN = V

(mA)

Typical Operating Characteristics (continued)

(Typical Application Circuit, V

= +2.7V to +5.5V, P

LNAIN

= -30dBm, f

LNAIN

= 881MHz, R

BIAS

= 20kΩ, T

= +25°C, unless other-

wise noted.)

LNA Output Port. This port requires an external pullup inductor, which may be used as part of the matching

network.

LNAOUTB2

Supply Voltage Input. Bypass with a 100pF capacitor to GND.V

LNA Bias Setting Pin. For nominal bias, connect 20kΩ resistor to V

. Adjust the resistor value to alter the

linearity of the LNA.

BIASB1

Gain-Control Logic Input. Drive high for high-gain mode. Drive low for low-gain mode.GAINA1

LNA Input Port. Blocking capacitor is required, which may be used as part of the matching network.LNAINA2

Ground GNDA3

FUNCTIONNAME

52515 35 45

GAIN vs. R

BIAS

AND TEMPERATURE

MAX2374-05

BIAS

(kΩ)

GAIN (dB)

= +85°C

= -40°C

= +25°C

= +85°C

= +25°C

GAIN = V

GAIN = GND

= 2.75V

0204060

IIP3 vs. R

BIAS

AND TEMPERATURE

MAX2374-06

BIAS

(kΩ)

IIP3 (dBm)

= 2.75V,

f = 881MHz, 882MHz

= V

GAIN

= GND

= V

GAIN

= V

= +25°C

= +85°C

= -40°C

= +85°C

= +25°C

= -40°C

Pin Description

1 2 3 4 5 6 7 8

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