Document
Rev. B1
RFX242 Single-Chip/Single Die CMOS 2.4GHz HighPower 802.11ac/n/g/b WLAN Linear Power Amplifier
MP Evaluation Board Test Results Summary & Technical Notes
9/16/2015
RFAXIS INC. CONFIDENTIAL NDA MATERIAL
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RFX242 Key Features and Benefits
(3.0x3.0x0.55mm RFX242 Differentiating Features
16L QFN)
Highly Integrated PA Solution, Gain=32dB,
NC VDD1 NC
NC
RFIN
NC
Eliminates the Need for Pre-driver Digital Logic with 1.2V Turn-On Voltage No Vref Regulator for Biasing Integrated Power Detector for Output
PAEN GND
VDD0
Bias Network
RFOUT RFOUT NC
Monitoring Requires Minimal External Components Small, Ultra-Thin 3.0mmx3.0mmx0.55mm 16L
QFN Package
NC NC DET NC
RFX242 APPLICATIONS WLAN AP/Router LTE/WiFi Router Femto Cell Outdoor WLAN Hotspot Set Top Box/Home Gateway Smart Energy/Smart Home Other 2.4GHz ISM Platforms
RFX242 Customer Benefits
Small Form-Factor and Quick Design Cycle Simplest Approach for Improving Link
Performance Very Low BOM Cost and Competitive Price
9/16/2015
RFAXIS INC. CONFIDENTIAL NDA MATERIAL
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9/16/2015
Pin-out and Pin Description
NC VDD NC NC
16 15 14 13
RFIN 1
12 NC
PAEN 2
17 GND
11 RFOUT
GND 3
10 RFOUT
VDD 4
9 NC
5678
NC NC DET NC
(Top "See-Through" View)
Pin Number 1 2
3, 17 4, 15
7 5, 6, 8, 9, 12,
13, 14, 16 10, 11
Pin Name RFIN PAEN GND VDD DET
NC
RFOUT
Description RF Input Signal to the PA – DC Internally Shorted to GND CMOS Logic Control to Enable the PA Ground – Must be Connected to Ground in the Application Circuit DC Supply Voltage PA Power Detector Voltage Output
Not Connected Internally
RF Output Signal from the PA
RFAXIS INC. CONFIDENTIAL NDA MATERIAL
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Eval Board and Recommended BOM
PAEN GND VDet VDD VDD VDD VDD GND
RF IN
C1 C2
C3 L1 C4 C6 L2
C10 C5 R1 R2 C13
C7 C9 C8 C11
C12
RF OUT
Recommended BOM
Designator Value Footprint Notes
C1, C12
22uF Case A Tantalum
C2, C11, C13 2.2uF 0603 X5R/X7R
C3, C8, C10 220pF 0402 X5R/X7R
C4 3.6pF 0402 C0G/NPO
C5 2.0pF 0402 C0G/NPO
C6 15pF 0402 C0G/NPO
C9 1.2pF 0402 C0G/NPO
L1 1.8nH 0402 Johanson
L2 1.5nH 0402 Johanson
R1 1KΩ 0402
R2 10KΩ 0402
DC Bias & Tx/Rx Logic Control:
VDD=5.0V nominal (3.6-5.5V operational)
Evaluation Board Information: - 4-Layer Stack, 10mil/40mil/10mil
- FR4 with er=4.5, tan d = 0.02 (Typ) - RFIN, RFOUT trace losses are ~0.25dB @ 2.45GHz - Results in following slides are referenced to device pins with the trace loss de-embedded - VDD can be powered up in any sequence - All VDDs should be powered on before applying ctrl signals
PA Enable: PAEN=High (>1.2V)
PA Disable: PAEN=Low (<0.3V)
9/16/2015
RFAXIS INC. CONFIDENTIAL NDA MATERIAL
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2 mm trace length
9/16/2015
Recommended Schematic and BOM
Optional
2 mm trace length
0.6 mm trace
length
Designator
C1
Optional
C11 C3, C8, C10
C4
C5
C6
C7
C9
L1
L2 R1 R2
Recommended BOM
Value Footprint Notes Tolerance
22uF Case A Tantalum NA
2.2uF 0603 X5R/X7R NA
220pF 0402 X5R/X7R NA
3.6pF 0402 C0G/NPO.