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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.

Absolute Maximum Ratings

Parameter

Rating

Unit

Supply Voltage

-0.5 to +6.0

V

DC

Input RF Level

+5 (see note)

dBm

32

mA

Operating Ambient Temperature

-40 to +85

°C

Storage Temperature

-40 to +150

°C

NOTE: Exceeding any one or a combination of the above maximum rating lim-

its may cause permanent damage. Input RF transients to +15dBm will not

harm the device. For sustained operation at inputs >+5dBm, a small dropping

to self-biasing to <32mA per channel.

Parameter

Specification

Unit

Condition

Min.

Typ.

Max.

Typical Operating Conditions

Temp=25°C, VCC=3.3V, VREF=3.3V,

Frequency=2450MHz for WiBro/WiFi Tune and

3500MHz for WiMax Tune, Gain Select=Low or

High depending on the test unless otherwise

noted in the condition column)

Frequency Range

900

4000

MHz

WiBRO/WiFi Low Noise

Amplifier

Frequency

2300

2450

2900

MHz

HIGH GAIN MODE

Gain

12.0

14.0

17.0

dB

RFIN1 to RFOUT1 or RFIN2 to RFOUT2 receieve

paths over full temp range, frequency, and pro-

cess.

Noise Figure

1.0

1.3

1.55

dB

Over full temp range, frequency, and process.

Input IP3

+7.0

+9.0

dBm

IIP3 will improve if ICC is raised above 7mA.

Output VSWR

1.7:1

2:1

Total Current Drain (per channel)

8.5

mA

Channel Isolation

-40

dBc

RFOUT2 when signal is applied at RFIN1 or

RFIN2

BYPASS MODE

Gain

-3.0

-2.5

-2.0

dB

Both RX paths, over full temp range and pro-

cess. Note: Bypass mode insertion loss will

Input IP3

+19.5

+21.0

+23.0

dBm

For each RX path, over full tmep range, and

process.

Output VSWR

1.6:1

Total Current Drain

2.0

3.0

mA

WiMAX Low Noise Amplifier

HIGH GAIN MODE

Frequency

3100

3500

MHz

Gain

10

12

14.5

dB

RFIN1 to RFOUT1 or RFIN2 to RFOUT2 receive

paths over full temp range, frequency, and pro-

cess.

Caution! ESD sensitive device.

Exceeding any one or a combination of the Absolute Maximum Rating conditions may

cause permanent damage to the device. Extended application of Absolute Maximum

Rating conditions to the device may reduce device reliability. Specified typical perfor-

mance or functional operation of the device under Absolute Maximum Rating condi-

tions is not implied.

RoHS status based on EUDirective2002/95/EC (at time of this document revision).

The information in this publication is believed to be accurate and reliable. However, no

responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any

infringement of patents, or other rights of third parties, resulting from its use. No

license is granted by implication or otherwise under any patent or patent rights of

RFMD. RFMD reserves the right to change component circuitry, recommended appli-

cation circuitry and specifications at any time without prior notice.