DATA SHEET • SE2431L: 2.4 GHz FRONT-END MODULE

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June 29, 2015 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202410J

Table 7. SE2431L Electrical Specifications: AC Characteristics, Diversity Antenna Function (Note 1)

C, as Measured on the Evaluation Board [De-Embedded to the Device], All Unused Ports Terminated with

50

Ω, Unless Otherwise Noted)

Parameter

Symbol

Min

Typical

Max

Units

Isolation between ANT1 and ANT2 ports

–20

dB

Antenna 1 to antenna 2 switching time

400

ns

Note 1: Performance is guaranteed only under the conditions listed in the above table. Unused antenna port should be connected to 50

Ω.

Table 8. SE2431L Logic Controls (Note 1)

C, Unless Otherwise Noted)

Mode

Description

CPS

CSD

CTX

ANT_SEL

0

All off (sleep mode) (Note 2)

0

0

0

X

1

Rx or Tx bypass mode

0

1

0

X

2

Rx LNA mode

1

1

0

X

3

Tx mode

X

1

1

X

ANT1 port enabled

X

1

X

0

ANT2 port enabled

X

1

X

1

Note 2: All controls must be at logic 0 to achieve the specified sleep current.

Evaluation Board Description

The SE2431L Evaluation Board is used to test the performance of

the SE2431L front-end module (FEM). An Evaluation Board

schematic diagram is provided in Figure 3. A reference design

schematic is shown in Figure 4. A photograph of the Evaluation

Board is shown in Figure 5. A Bill of Materials (BOM) for the

Evaluation Board is provided in Table 9.

Evaluation Board Setup Procedure

Connect Supply

1. Connect J32, J34, and J35 to 50

Ω instruments. Terminate all

unused ports (if applicable) with 50

Ω.

2. Connect the supply ground to Pin 20 of the J36 header.

3. Connect 3.0 V to Pins 1, 3, and 16 of J36.

4. Refer to Table 8 for information about selecting the required RF

path and for antenna port control.

Measure TX Performance

Apply an RF signal to connector J34 (TR) to monitor the 2.4 GHz

amplifier performance. Monitor the output power on connector

J35 (ANT1) or J32 (ANT2).

Measure RX Performance

Apply an RF signal to connector J35 (ANT1) or J32 (ANT2) to

monitor the 2.4 GHz LNA performance. Monitor the output signal

on connector J34 (TR).

CAUTION: Care should be taken not to overdrive the amplifier by

applying too much RF on the input to the device. A

suitable starting input power for the device is

–20 dBm.