CMOSTEK CMT2210A Design Manualline Download Page 10

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AN107

Rev 1.0 | Page 10/10

www.hoperf.com

5. Contact Information

Hope Microelectronics Co., Ltd

Address: 2/F,Building3,Pingshan Private Enterprise science and Technology Park,Xili Town,Nanshan District,Shenzhen,China

Tel: +86-755-82973805

Fax: +86-755-82973550

The information furnished by CMOSTEK is believed to be accurate and reliable. However, no responsibility is

assumed for inaccuracies and specifications within this document are subject to change without notice. The

material contained herein is the exclusive property of CMOSTEK and shall not be distributed, reproduced, or

disclosed in whole or in part without prior written permission of CMOSTEK. CMOSTEK products are not

authorized for use as critical components in life support devices or systems without express written approval of

CMOSTEK. The CMOSTEK logo is a registered trademark of CMOSTEK Microelectronics Co., Ltd. All other

names are the property of their respective owners.

Copyright. CMOSTEK Microelectronics Co., Ltd. All rights are reserved.

Summary of Contents for CMT2210A

Page 1: ...reless applications The chip is part of the CMOSTEK NextGenRFTM family which includes a complete line of transmitters receivers and transceivers To give the CMT2210A schematic design guidelines an exa...

Page 2: ...d be within 60 in order to ensure a reliable start up The total tolerance is 20 ppm typically which include initial tolerance crystal loading aging and temperature dependence The acceptable tolerance...

Page 3: ...ce clock input 10 nRSTO O Active low power on reset output to reset an external MCU 11 VCOP IO VCO tank connected to an external inductor 12 VCON 13 15 GND I Ground 14 RFIN I RF input 16 VDD I Power s...

Page 4: ...transmission line is in proportion to the thickness of the PCB and the distance between the routing and grounding around it It is in inverse proportion to the width thickness of the routing and the di...

Page 5: ...ignal routing should be smooth to avoid the impedance variation on the transmission lines which will result in RF signal reflection and performance inconsistency in mass production Wherever possible t...

Page 6: ...d as this may shift the crystal DC operating point and result in duty cycle variation The XTAL circuit is shown in the figure below Figure 5 XTAL Circuit Layout 3 1 4 Digital Signals Routing The digit...

Page 7: ...his port To minimize the radiation from the VCO circuit and maintain the high Q factor of the VCO tank L2 should be placed as close as possible to the CMT2210A The VCO tank is surrounded by a solid gr...

Page 8: ...us ground plane metallization as possible 2 Place a series of ground vias along the PCB edges if possible The maximum distance between the vias should be less than 10 This is required to reduce the PC...

Page 9: ...AN107 Rev 1 0 Page 9 10 www hoperf com 4 Document Change List Table 3 Document Change List Rev No Chapter Description of Changes Date 0 9 Initial released version 2014 06 14 1 0 2014 06 30...

Page 10: ...is assumed for inaccuracies and specifications within this document are subject to change without notice The material contained herein is the exclusive property of CMOSTEK and shall not be distribute...