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RF3857

DS110616

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.

Parameter

Specification

Unit

Condition

Min.

Typ.

Max.

WiMAX Low Noise Amplifier,

cont.

Noise Figure

1.2

1.7

2.0

dB

Over full temp range, frequency range, and pro-

cess.

IIP3

9

dBm

Total Current Drain (per channel)

8.5

10

mA

VCC=3.3V, VREF=3.3V, Gain select<1.8V.

BYPASS MODE

Gain

-3

dB

Note: Bypass mode insertion loss will degrade

Input IP3

20

dBm

Total Current Drain (per channel)

2

mA

Power Supply

1.8

3.0

5.0

V

See bias note

0.8

V

High Gain mode.

1.8

V

Low Gain mode.

Power Down per RX Path

0

10

full temp range, frequency, and beta)

VREF1 or VREF 2 Turn On/Off

100

<150

nSec

For faster turn on and off time C1 and C2

should be changed from 22nF to a value

between 10pF to 100pF

Gain Select 1 or 2 Turn On/Off

100

<150

nSec

For faster turn on and off time C1 and C2

should be changed from 22nF to a value

between 3.0pF to 100pF

Bias note: Due to the presence of ESD protection circuitry on the RF3857, the maximum allowable collector bias voltage (pin 4) is 4.0V. Higher