ETC SE2520L-EK3

SE2520L-EK3
RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
Application
ƒ
ƒ
Product Description
IEEE 802.11b
2.4GHz Cordless Phones
The SE2520L-EK3 Evaluation Kit is a tool that is
intended to demonstrate the advantages of the
RangeChargerTM SE2520L Power Amplifier and assist
customers into full-scale production. The board
facilitates
evaluation,
experimentation
and
investigation with various modes of operation of the
SE2520L. The board demonstrates the SE2520L in
an application where matching, filtering, and switching
are employed. The SE2520L-EK3 design and layout
can be quickly and easily transferred into a production
design.
Features
ƒ
ƒ
ƒ
ƒ
ƒ
Fully designed and tested 802.11b transmitter
front-end using the SE2520L power amplifier
Demonstrates the capabilities of the SE2520L in
802.1b applications
Optimized matching networks and harmonic filter
Power Detector, Rx/Tx Switch and Diversity
Switch included
Ready to be designed into production.
The SE2520L-EK3 Evaluation Kit comprises of an
SE2520L-EV3 evaluation board with 50Ω termination,
an SE2520L-EK3 datasheet, and an SE2520L
datasheet.
Order Information
Type
Package
Remark
SE2520L-EK3
N/A
None
Functional Block Diagram
SE2520L
Evaluation
Board Diagram
VCC
(JP3)
JP4
JP7
JP2
JP8
`
JP1
SE2520L
Match
Tx-Rx
Switch
Low Pass
Filter
Power
Detector
VCTL
(JP3)
JP5
VEN
(JP3)
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50 ohms
Diversity
Switch
JP6
VDP
(JP3)
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SE2520L-EK3
RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
Picture
SE2520L
JP5
JP4
JP8
JP7
JP2
(RF OUT1)
JP1
(RF IN)
JP6
(RF OUT2)
Pin 1
JP3
Figure 1: SE2520L-EV3
Contents Of Evaluation Kit
Quantity
1
1
1
1
Description
Reference
SE2520L Evaluation Board
SE2520L-EV3
SE2520L Evaluation Kit Datasheet
15-DST-02
SE2520L Datasheet
15-DST-01
50Ω Termination
Table 1: Contents of Evaluation Kit
Configuration
Tables 2, 3 and 4 describe how the evaluation board can be configured. The evaluation kit is pre-configured when
shipped to operate with the SE2520L enabled, in transmit mode, at maximum gain, with the signal output on JP2,
and a 50Ω termination on JP6.
RF Input
A signal generator can be connected on header JP1 to drive the SE2520L which is matched to 50Ω. The
recommended power level for 802.11b operation is approximately -8dBm. It is recommended to keep the input power
level to a maximum of +8dBm to avoid potential damage of the SE2520L.
RF Outputs
The RF output can be measured on either JP2 or JP6 pending the setting of a diversity switch included on the
evaluation board. The diversity switch settings are described in Table 4. It is recommended to terminate the unused
RF output port with a 50Ω termination to avoid possible reflections.
A receive mode can be emulated where RF outputs JP2 or JP3 are routed to a 50Ω termination via an Rx/Tx switch
on the evaluation board. Table 3 describes how to control the Rx/Tx switch.
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SE2520L-EK3
RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
Power and DC Controls
The board is powered from a single 3.3V supply that is connected to the 4mm connectors on the board. +3.3V should
be connected to pin 8 (VCC) on JP3 and GND to pin 7 on JP3.
The SE2520L offers an analog power control and a digital enable/disable feature. To enable the SE2520L, jumper
pins 2 and 3 on JP3. To disable the SE2520L, jumper pins 1 and 2 on JP3. A control voltage between 0V and 3.3V
can also be applied on pin 5 of JP3 to set the amplifier gain thereby controlling the output power. Refer to the
SE2520L data sheet for the relationship between power control pin voltage and output power. Jumper settings can
also be employed to control gain. For maximum gain, jumper pins 5 and 6 on JP3. For minimum gain, jumper pins 4
and 5.
JP3 Header Pins
Description
8
3.3V (VCC) Supply Connection
7
Ground (GND) Connection
5
Gain Control Connection (VCTL), 0 – 3.3V
Jumper Pins 5 and 6
Maximum Gain
Jumper Pins 4 and 5
Minimum Gain
Jumper Pins 2 and 3
Enables SE2520L
Jumper Pins 1 and 2
Disables SE2520L
Table 2: JP3 Header Settings
Receive or transmit mode can be selected via an Rx/Tx switch on the evaluation board. Settings are described in
Table 3 below.
Mode
Short JP4 To
Short JP5 To
Transmit
GND
VCC
Receive
VCC
GND
Illegal Mode
GND
GND
Illegal Mode
VCC
VCC
Table 3: Rx/Tx Switch Jumper Settings
The evaluation board includes an antenna diversity switch. The RF output (JP2 or JP6) selection is described in
Table 4 below.
RF Output
Short JP7 To
Short JP8 To
JP2 (Antenna 1)
VCC
GND
JP6 (Antenna 2)
GND
VCC
Illegal Mode
GND
GND
Illegal Mode
VCC
VCC
Table 4: RF Output Selection Jumper Settings
Power Detector Output
As shown in Figure 1, pin 10 (VPD) of header JP3 on the evaluation board is used to measure the output power. This
output level is a voltage that changes with respect to the output power level, as shown in Figure 2. This detector can
be used to monitor the average output power of the antenna connector, allowing the dynamic control of its output.
Note: The transfer function shown in Figure 2 is valid when the evaluation board is operating with a 3.3 volt DC
supply with its output terminated in 50Ω.
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RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
2.00
1.80
1.60
VPD (V)
1.40
1.20
1.00
0.80
0.60
0.40
0.20
8
10
12
14
16
18
20
22
Output Power (dBm)
Figure 2: Typical Power Detector Output (VPD) vs. Output Power Characteristic
Evaluation Board Schematic
VCC
JP3
VCC
GND
VCC
VCTL
GND
VCC
VEN
GND
GND
VPD
3
1
6
5
4
8
2
7
9
10
VCC
VPD
C10
C5
1000pF
10pF
C6
C11
10pF
0.1uF
JP4
C8
0.1uF
C9
0.1uF
R7
NF
1
VCTL
2
RFIN
3
VCC
1
L2
2.7nH
RFOUT
VEN
VCC1
GN
RFIN D VCC0
3
L1
3.3nH
C4
1.0pF
C2
10pF
6
HEADER
R3
10R
C1
1.8pF
L3
3.6nH
L4
3.6nH
1
2
VCC
C13
0.1uF
C12
1.0pF
C17
1.2pF
C24
NF
C3
33pF
R1
3K
3
SW1
J3
V2
GND
J1
J2
V1
6
2
OPA338
4
+
3
R9
4.3K
4
6
RFOUT 1
1
C27
22pF
C21
10pF
R2
50R
D1
SMS7630-020
R4
10R
C26
220pF
L5
3.3nH
JP5
SW2
V1
J2
J1
GND
V2
J3
GND
IN
GND
JP2
SMA
3
2
3
2
1
AS179-92
VCC
1
2
3
HEADER
R12
10K
5
AS179-92
5
R10
NF
4
C15
10pF
R8
4.3K
-
C18
22pF
C23
10pF
C16
22pF
5
U2
1
HEADER
R6
10R
C20
10pF
5
4
JP8
3
2
1
10pF
VCC
VPD
VCC
1
2
3
C25
0.1uF
C7
U1
SE2520L
GND
IN
GND
JP1
SMA
C14
10uF
VCC
HEADER 10
2
+
C22
10pF
R5
10R
VCC
C19
22pF
RFOUT 2
1
GND
IN
GND
JP6
SMA
3
2
JP7
3
2
1
HEADER
R11
1.5K
PCB Material - FR-4
Relative Dielectric Constant Er - 4.5
Board Thickness - 10 mil
Copper oz.
Figure 3: Evaluation Board Schematic Diagram
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RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
Evaluation Board Bill Of Materials
Item
1
2
3
4
5
Qty
5
2
1
1
1
6
9
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
1
4
1
25
26
27
28
29
30
1
2
2
1
4
1
1
2
1
1
3
22
pins
2
1
1
1
1
Reference
C11,C13,C25,C8,C9
C12,C4
C17
C1
C10
C15,C2,C20,C21,C22,C23,
C5,C6,C7
C14
C26
C16,C18,C19,C27
C3
C24
L2
L1,L5
L3,L4
R11
R3,R4,R5,R6
R12
R1
R8,R9
R2
R10
R7
D1
JP1, JP2, JP6
JP3,JP4,JP5,JP7,JP8
SW1, SW2
U1
U2
Part Description
0.1uF
1.0pF
1.2pF
1.8pF
1000pF
Supplier Information
Murata - GRP155R61A104KA01
Murata - GRP1555C1H1R0CZ01
Murata - GRP1555C1H1R2CZ01
Murata - GRP1555C1H1R8CZ01
Murata - GRP155R71H102KA01
10pF
Murata - GRP1555C1H100JZ01
10uF
220pF
22pF
33pF
NF
2.7nH
3.3nH
3.6nH
1.5KΩ
10KΩ
6.8KΩ
3KΩ
4.3KΩ
50Ω
Not Fitted (NF)
Not Fitted (NF)
Diode
SMA RF Connector
10 and 12 pin 0.1" pitch
through header
RF Switch
Power Amplifier
Op Amp
PCB - FR4
50Ω Termination
Panasonic - ECST1AX106R
Murata - GRP155R71H221KA01
Murata - GRP1555C1H220JZ01
Murata - GRP1555C1H330JZ01
Murata - LQP15MN2N7B02B
Murata - LQP15MN3N3B02B
Murata - LQP15MN3N6B02B
N/A
N/A
N/A
N/A
N/A
N/A
Alpha - SMS7630-020
Johnson - 142-0701-886
3M - 929647-09-36-I
Alpha - AS179-92
SiGe - SE2520L
TI - OPA338
Table 5: Evaluation Kit Bill of Materials
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SE2520L-EK3
RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
Evaluation Board Layout
Optimum layout of the evaluation board is critical. The input and output matching networks are dependent on the
layout for the values of the output power, power added efficiency, current consumption, and harmonics generation.
RF tracks should be as short as possible to reduce losses and minimize RF power emissions. The exposed pad at
the bottom of the package is the ground connection for the IC. The ground vias should be placed as close as possible
to this pad. All VCC lines should be decoupled as close as possible to the IC pins, and the ground end of the
decoupling capacitors should have the shortest path to the IC ground possible.
The SE2520L requires three matching networks: input matching, inter-stage matching via its VCC1 pin and output
matching. In total, only 7 critical components are required: 5 capacitors and 2 inductors. For specific performance
tuning and power supply decoupling, additional components may be used.
Input Matching
Interstage Matching
Output Matching
The SE2520L's input impedance (Zin) at Pin = -8dBm and F=2.45GHz is Zin = (12+j*1.2)Ω.
For maximum gain, the input of the SE2520L should be conjugately matched, i.e.
Zs = (Zin)* = (12-j*1.2)Ω.
The matching of the output of the first stage and input of the second stage is merged and
requires the use of only one capacitor. The capacitor shown in the schematic on page 1,
C3, is required for decoupling only. The dimensions of the microstrip line shown on Vcc1
is 10mils x 100mils. (FR4, 10mil thickness, top-ground).
The SE2520L-EK3 is designed as to maximize the SE2520L's 1dB Compression Point
(P1dB). A load impedance of ZL = (31.9+j*14.6)Ω is presented to the output of the PA. This
is achieved with components L1, C2 and C4. Components C12, L3 and L4 form a low-pass
filter to reduce the harmonics below FCC regulations.
Table 6: Evaluation Board Matching Arrangement
Note: Layout diagrams shown in Figures 4, 5, 6, 7, 8 and 9 are for information purposes only. They may not correctly
show all traces, and are not to scale. Please contact your SiGe Semiconductor sales representative for the proper
layout files.
Figure 4: Copper Layer 1
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RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
Figure 5: Copper Layer 2 (Ground Plane)
Figure 6: Copper Layer 3
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RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
Figure 7: Component Placement
Figure 8: 6-Pin LPCC Printed Circuit Board Footprint
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RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
Figure 9: 6-Pin LPCC Package Drawing
Notes: 1.
2.
3.
4.
5.
Dimensions are in millimeters
Tolerance 0.1mm unless otherwise specified
Moisture/ Reflow Sensitivity Classification: Level 1 (IPC/JEDEC-J-STD-020A)
Exposed heat/electrical ground pad at bottom of package
Lead finish is 100% lead-free electrolytic tin.
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RangeChargerTM 802.11b WLAN Evaluation Kit
Preliminary Information
http://www.sige.com
Email:
[email protected]
Customer Service Locations:
North America:
1050 Morrison Drive, Suite 100
Ottawa ON K2H 8K7 Canada
Hong Kong
Phone: +852 3428 7222
Fax: +852 3579 5450
Phone: +1 613 820 9244
Fax: +1 613 820 4933
San Diego
Phone: +1 858 668 3541 (ext. 226)
Fax: +1 858 668 3546
United Kingdom
Phone: +44 1264 850754
Fax: +44 1264 852601
Product Preview
The datasheet contains information from the product concept specification. SiGe Semiconductor, Inc. reserves the right to change
information at any time without notification.
Preliminary Information
The datasheet contains information from the design target specification. SiGe Semiconductor, Inc. reserves the right to change
information at any time without notification.
Production testing may not include testing of all parameters.
Information furnished is believed to be accurate and reliable and is provided on an “as is” basis. SiGe Semiconductor, Inc. assumes
no responsibility or liability for the direct or indirect consequences of use of such information nor for any infringement of patents or
other rights of third parties, which may result from its use. No license or indemnity is granted by implication or otherwise under any
patent or other intellectual property rights of SiGe Semiconductor, Inc. or third parties. Specifications mentioned in this publication
are subject to change without notice. This publication supersedes and replaces all information previously supplied. SiGe
Semiconductor, Inc. products are NOT authorized for use in implantation or life support applications or systems without express
written approval from SiGe Semiconductor, Inc.
TM
TM
RangeCharger , StreamCharger , and PointCharger
TM
are trademarks owned by SiGe Semiconductor, Inc.
Copyright 2006 SiGe Semiconductor, Inc.
All Rights Reserved
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