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7.3.2 22 pF coupling capacitor using internal antenna

In this configuration, instead of the simple short, a 22 pF capacitor is used at C9 connecting

and

pin. C6, C7, C8 and C10 are left unassembled. Figures

and

show this in

detail.

Figure 11: Capacitor internal antenna schematic

Figure 12: Capacitor internal antenna layout

Ophelia-I reference manual version 1.0

© January 2022

www.we-online.com/wireless-connectivity

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Summary of Contents for OPHELIA-I

Page 1: ...OPHELIA I REFERENCE MANUAL 2612011022000 VERSION 1 0 JANUARY 27 2022 ...

Page 2: ...Revision history Manual version HW version Notes Date 1 0 1 0 Initial release December 2021 Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 1 ...

Page 3: ... Low dropout voltage regulator Bluetooth LE Bluetooth Low Energy PCB Printed Circuit Board RAM Random Access Memory RF Radio frequency Describes wireless transmission RSSI Receive Signal Strength Indicator The RSSI indicates the strength of the RF signal Its value is always printed in two s complement notation SMA SubMiniature version A SWD Serial Wire Debug UART Universal Asynchronous Receiver Tr...

Page 4: ...c and layout 16 7 2 Dimensioning of the micro strip antenna line 18 7 3 Antenna connection 19 7 3 1 Simple short using internal antenna 20 7 3 2 22 pF coupling capacitor using internal antenna 21 7 3 3 22 pF coupling capacitor using external antenna 22 7 4 Antenna fine tuning 23 7 5 Antenna solutions 23 7 5 1 Wire antenna 23 7 5 2 Chip antenna 24 7 5 3 PCB antenna 24 7 5 4 Antennas provided by Wür...

Page 5: ...ions 39 14 3 Best care and attention 39 14 4 Customer support for product specifications 39 14 5 Product improvements 40 14 6 Product life cycle 40 14 7 Property rights 40 14 8 General terms and conditions 40 15 Legal notice 41 15 1 Exclusion of liability 41 15 2 Suitability in customer applications 41 15 3 Trademarks 41 15 4 Usage restriction 41 16 License terms 43 16 1 Limited license 43 16 2 Us...

Page 6: ...rtification of Proteus e 3 Test reports can be requested from BDM or support Depending on the firmware developed and flashed on the module a wide range of applica tions is possible For example the module can be configured to communicate with external sensors can use security configurations and can be optimized for low power consumption Ultra small dimensions of 7 x 9 mm including a strongly miniat...

Page 7: ... core 2 4GHz 50Ω port to λ 4 antenna Antenna external wiring according to reference design Figure 2 Block diagram of the module 1 3 Ordering information WE order code Description 2612011022000 Ophelia I Module Tape Reel 2612019022001 Ophelia I Evaluation Board Table 1 Ordering information Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 6 ...

Page 8: ...Unit Ambient temperature 40 25 85 C Supply voltage VDD 1 8 3 3 6 V Supply rise time 0V to 1 7V 60 ms Table 2 Recommended operating conditions The on chip power on reset circuitry may not function properly for rise times longer than the specified maximum An instable supply voltage may significantly decrease the radio performance and stability 2 2 Absolute maximum ratings Parameter Min Max Unit Supp...

Page 9: ...ditions Value Unit RX Current consumption Receiver only 1Mbps Bluetooth LE CPU current not included from nRF52 data sheet 6 1 mA Full module current consumption Proteus e module Bluetooth LE firmware 6 8 mA Table 5 Current consumption receiving Parameter Test conditions Value Unit Current consumption Sleep system off mode 0 3 µA Table 6 Current consumption low power Figure 3 Sleep current no RAM r...

Page 10: ... Output power Conducted 4 dBm Radiated 4 dBm Input sensitivity Conducted BER 1E 3 1Mbps Bluetooth LE 93 dBm Conducted BER 1E 3 1Mbps Bluetooth LE LDO mode 97 dBm Radiated BER 1E 3 1Mbps Bluetooth LE 85 dBm Table 10 Transmit and receive power All transmit and receive power levels are measured on the evaluation board The values already include losses of transitions from module to motherboard to SMA ...

Page 11: ...ive VDD 2 7 V 6 10 15 mA Current at VSS 0 4 V output set low high drive VDD 1 7 V 3 mA Current at VDD 0 4 V output set high standard drive VDD 1 7V 1 2 4 mA Current at VDD 0 4 V output set high high drive VDD 2 7 V 6 9 14 mA Current at VDD 0 4 V output set high high drive VDD 1 7 V 3 mA Internal pull up resistance 11 13 16 kΩ Internal pull down resistance 11 13 16 kΩ Table 11 Pin characteristics O...

Page 12: ...21 nRESET VDD GND P0 20 P0 18 P0 16 P0 00 XL1 P0 14 P0 04 AIN2 P0 05 AIN3 P0 12 1 6 B1 7 10 11 15 B4 GND P0 01 XL2 Figure 4 Pinout top view Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 11 ...

Page 13: ...ge 8 P0 05 AIN3 I O analog input General purpose I O ADC input 9 P0 04 AIN2 I O analog input General purpose I O ADC input 10 P0 14 I O General purpose I O 11 P0 00 XL1 I O General purpose I O connection for 32 768 kHz crystal 12 P0 01 XL2 I O General purpose I O connection for 32 768 kHz crystal 13 P0 16 I O General purpose I O 14 P0 18 I O General purpose I O 15 P0 20 I O General purpose I O B1 ...

Page 14: ...enna are miniaturization of the end appli cation and applications with required radio range of just few meters 4 2 External antenna For applications that use an external antenna the Ophelia I provides a 50 Ω RF signal on pin RF of the module In this configuration pin ANT of the module has to be left open and pin RF has to be connected to the external antenna via 50 Ω feed line An external antenna ...

Page 15: ...ng number The additional information needed for this type of customer firmware such as hardware spe cific details and details towards the development of such firmware are not available for the public and can only be made available to qualified customers The qualification s of the standard module cannot be applied to this customer firmware solution without a review and verification 5 2 Contact for ...

Page 16: ... module flash access This interface can be used by customers to erase the entire chip and install their own firmware Customers flashing their own firmware are fully responsible for certification declaration listing and qualification Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 15 ...

Page 17: ...rnal reset IC should be considered particularly if one of the following points is relevant The slew rate of the power supply exceeds the electrical specifications The effect of different current consumptions on the voltage level of bat teries or voltage regulators should be considered The module draws higher currents in certain scenarios like start up or radio transmit which may lead to a voltage ...

Page 18: ...layer of the baseboard On the second layer a ground plane is recommended to provide good grounding and shielding to any following layers and application environment In case of integrated antennas it is required to have areas free from ground This area should be copied from the evaluation board The area with the integrated antenna must overlap with the carrier board and should not protrude as it is...

Page 19: ...sed areas Figure 6 Placement of the module with integrated antenna 7 2 Dimensioning of the micro strip antenna line Figure 7 Dimensioning the antenna feed line as micro strip The antenna track has to be designed as a 50 Ω feed line The width W for a micro strip can be calculated using the following equation W 1 25 5 98 H e 50 r 1 41 87 Tmet 1 Ophelia I reference manual version 1 0 January 2022 www...

Page 20: ... pins RF and ANT pin to be used if size and price is critical and the range is uncritical A 22 pF capacitor connecting RF and ANT pin to be used if size and price is less critical but an assembly variant with external antenna is also be used A 22 pF capacitor connecting RF pin to an external antenna for example Himalia 2 described in chapter 7 5 4 1 This configuration suits best if size and price ...

Page 21: ...e short is a 50 Ω coplanar strip connecting RF and ANT pin Figures 9 and 10 show this in detail Figure 9 Simple short schematic Figure 10 Simple short layout Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 20 ...

Page 22: ... capacitor is used at C9 connecting RF and ANT pin C6 C7 C8 and C10 are left unassembled Figures 11 and 12 show this in detail Figure 11 Capacitor internal antenna schematic Figure 12 Capacitor internal antenna layout Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 21 ...

Page 23: ...g the RF pin to a dipole an tenna Himalia 2 chapter 7 5 4 1 C7 C8 C9 and C10 are left unassembled Figures 13 and 14 show this in detail Figure 13 Capacitor external antenna schematic Figure 14 Capacitor external antenna layout Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 22 ...

Page 24: ...Both usually fit inside a housing Range optimization in general is at the expense of space Antennas that are bigger in size so that they would probably not fit in a small housing are usually equipped with a RF con nector A benefit of this connector may be to use it to lead the RF signal through a metal plate e g metal housing cabinet As a rule of thumb a minimum distance of λ 10 which is 3 5 cm 86...

Page 25: ...as reference designs should be followed as closely as possible because only in this constellation can the stated performance be achieved 7 5 3 PCB antenna PCB antenna designs can be very different The special attention can be on the miniaturiza tion or on the performance The benefits of the PCB antenna are their small not existing if PCB space is available costs however the evaluation of a PCB ant...

Page 26: ...50 VSWR 2 1 Polarization Linear Radiation Omni Directional Peak Gain dBi 2 8 Average Gain dBi 0 6 Efficiency 85 Dimensions L x d mm 83 1 x 10 Weight g 7 4 Connector SMA plug Operating temp C 40 80 Special care must be taken for FCC certification when using this external antenna to fulfil the requirement of permanently attached antenna or unique coupling for example by using the certified dipole an...

Page 27: ...e Ophelia I evaluation board The reference design is the same for the Proteus e and Ophelia I radio mod ules The module s pins on the schematic are named according to Ophelia I module The pin compatibility table between Ophelia I and Proteus e is shown in the schematic Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 26 ...

Page 28: ...TP8 LED1 R7 LED2 R1 R2 R6 R11 5 1 2 3 2 2 D3 D1 P2 1 2 3 4 R12 R13 P1 02x11 1 3 5 7 9 11 2 4 6 8 10 12 13 14 15 16 17 18 19 20 21 22 VDD VDD P0 14 P0 14 RXD_FTDI RXD_FTDI GND GND 5V0 5V0 D D D D 3V3_OUT SWDIO SWDIO SWDIO SWDCLK SWDCLK SWDCLK P0 18 P0 18 P0 16 P0 16 P0 20 P0 20 P0 04 P0 04 TXD_FTDI TXD_FTDI MOD_VDD MOD_VDD MOD_VDD MOD_VDD MOD_VDD MOD_VDD 5V 5V RTS_FTDI RTS_FTDI CTS_FTDI CTS_FTDI RE...

Page 29: ... 2 Layout 1 no metal antenna NO META 12 5mm NO METAL 12 5mm 1 4 3 2 PCB edge Figure 17 Reference design Layout Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 28 ...

Page 30: ...to TP 3 C second max Liquidous temperature TL 217 C Time tL maintained above TL tL 60 150 seconds Peak package body temperature TP 260 C Time within 5 C of actual peak temperature tP 20 30 seconds Ramp down Rate TP to TL 6 C second max Time 20 C to TP 8 minutes max Table 13 Classification reflow soldering profile Note refer to IPC JEDEC J STD 020E It is recommended to solder this module on the las...

Page 31: ...ay also destroy the label and ink jet printed text on it Cleaning processes using alcohol or other organic solvents may draw solder flux residues into the housing which won t be detected in a post wash inspection The solvent may also destroy the label and ink jet printed text on it Do not use ultrasonic cleaning as it will permanently damage the part particularly the crystal oscillators 9 2 3 Pott...

Page 32: ...s of production including on the host PCB where the module is installed For ESD ratings refer to the module series maximum ESD section For more information refer to the relevant chapter 2 Failing to follow the aforementioned recommendations can result in severe damage to the part the first contact point when handling the PCB is always between the local GND and the host PCB GND unless there is a ga...

Page 33: ...he product must be provided with a consolidated voltage source The wiring must meet all applicable fire and security prevention standards Handle with care Avoid touching the pins as there could be ESD damage Be careful when working with any external components When in doubt consult the technical documentation and relevant standards Always use an antenna with the proper characteris tics Würth Elekt...

Page 34: ... sensitive WLCSP package is used This package is sensitive to visible and near infrared light As the chip is not completely shielded on the sides any mounting without enclosure could lead to malfunction This should be taken into account when designing an enclosure for the end device Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 33 ...

Page 35: ...le drawing 3 6 2 0 0 3 1 6 B4 7 10 11 15 B1 1 2 9 0 9 0 0 2 6 0 4 8 1 2 0 7 q 7 0 0 2 Figure 19 Module dimensions mm Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 34 ...

Page 36: ...f the antenna the recommended free area around the antenna should be maintained As rule of thumb a minimum distance of metal parts to the antenna of λ 10 should be kept see figure 20 Even though metal parts would influence the characteristic of the antenna but the direct influence and matching keep an acceptable level Ophelia I reference manual version 1 0 January 2022 www we online com wireless c...

Page 37: ...o the following table Figure 21 Lot number structure Block Information Example s 1 eiSos internal 3 digits 439 2 eiSos internal 2 digits 01 3 Hardware version 3 digits V2 4 024 V12 2 122 4 Date code 4 digits 2103 week 03 in year 2021 2216 week 16 in year 2022 5 Firmware version 3 digits V3 2 302 V5 13 513 Table 16 Lot number details Ophelia I reference manual version 1 0 January 2022 www we online...

Page 38: ...fused The maximum output power of the module is 5 dBm for radio pad The total amount of capacitance of all capacitors is 6 8 µF The total amount of inductance of all inductors is 10 009 µH A DC DC regulator is included in the chip set and used to obtain low power functionality Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 37 ...

Page 39: ...roducts nrf52805 2 Würth Elektronik Himalia https www we online com catalog en WIRL_ACCE_ 2600130021 3 Würth Elektronik Proteus e user manual https www we online de katalog de manual 2612011024000 Ophelia I reference manual version 1 0 January 2022 www we online com wireless connectivity 38 ...

Page 40: ... the current state of the art even if the products are operated within the range of the specifications The same statement is valid for all software sourcecode and firmware parts contained in or used with or for products in the wireless connectivity and sensor product range of Würth Elektronik eiSos GmbH Co KG In certain customer applications requiring a high level of safety and especially in custo...

Page 41: ...e it needs to be verified with the field sales engineer or the internal sales person in charge about the current product availability expectancy before or when the product for application design in disposal is con sidered The approach named above does not apply in the case of individual agreements deviating from the foregoing for customer specific products 14 7 Property rights All the rights for c...

Page 42: ...Sos GmbH Co KG products are integrated with applicable legal regulations Customer acknowledges and agrees that it is solely responsible for compliance with all le gal regulatory and safety related requirements concerning its products and any use of Würth Elektronik eiSos GmbH Co KG components in its applications notwithstanding any applications related in formation or support that may be provided ...

Page 43: ...l public information network etc Würth Elektronik eiSos GmbH Co KG must be informed about the intent of such usage before the design in stage In addition sufficient reliability evaluation checks for safety must be performed on every electronic component which is used in electrical circuits that require high safety and reliability function or perfor mance By using Würth Elektronik eiSos GmbH Co KG ...

Page 44: ... engineer decompile disassemble or create derivative works of the incorporated Software and the source code in whole or in part No more extensive rights to use and exploit the products are granted to you 16 2 Usage and obligations The responsibility for the applicability and use of the Würth Elektronik eiSos wireless con nectivity product with the incorporated Firmware in a particular customer des...

Page 45: ... firmware in the latest version of the product manual on our website The revision table in the product manual provides all necessary information about firmware updates There is no right to be provided with binary files so called Firmware images those could be flashed through JTAG SWD Spi Bi Wire SPI or similar interfaces 16 5 Disclaimer of warranty THE FIRMWARE IS PROVIDED AS IS YOU ACKNOWLEDGE TH...

Page 46: ...aining provisions of the terms The parties shall replace any such provisions with new valid provisions that most closely approximate the purpose of the terms 16 9 Miscellaneous Würth Elektronik eiSos reserves the right at any time to change this terms at its own discre tion It is your responsibility to check at Würth Elektronik eiSos homepage for any updates Your continued usage of the products wi...

Page 47: ...al antenna layout 22 15 2 4 GHz dipole antenna 25 16 Reference design Schematic 27 17 Reference design Layout 28 18 Reflow soldering profile 30 19 Module dimensions mm 34 20 Footprint WE FP 4 mm 35 21 Lot number structure 36 List of Tables 1 Ordering information 6 2 Recommended operating conditions 7 3 Absolute maximum ratings 7 4 Current consumption transmitting 8 5 Current consumption receiving ...

Page 48: ... Internet of Things more than you expect Contact Würth Elektronik eiSos GmbH Co KG Division Wireless Connectivity Sensors Max Eyth Straße 1 74638 Waldenburg Germany Tel 49 651 99355 0 Fax 49 651 99355 69 www we online com wireless connectivity ...

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