WP7504-1G_1103669

AirPrime WP7504 Hardware Integration Guide 4119157 Rev 1 Preface Important Notice Due to the nature of wireless communications, transmission and reception of data can never be guaranteed. Data may be delayed, corrupted (i.e., have errors) or be totally lost. Although significant delays or losses of data are rare when wireless devices such as the Sierra Wireless modem are used in a normal manner with a well-constructed network, the Sierra Wireless modem should not be used in situations where failure to transmit or receive data could result in damage of any kind to the user or any other party, including but not limited to personal injury, death, or loss of property. Sierra Wireless accepts no responsibility for damages of any kind resulting from delays or errors in data transmitted or received using the Sierra Wireless modem, or for failure of the Sierra Wireless modem to transmit or receive such data. Safety and Hazards Do not operate the Sierra Wireless modem in areas where blasting is in progress, where explosive atmospheres may be present, near medical equipment, near life support equipment, or any equipment which may be susceptible to any form of radio interference. In such areas, the Sierra Wireless modem MUST BE POWERED OFF. The Sierra Wireless modem can transmit signals that could interfere with this equipment. Do not operate the Sierra Wireless modem in any aircraft, whether the aircraft is on the ground or in flight. In aircraft, the Sierra Wireless modem MUST BE POWERED OFF. When operating, the Sierra Wireless modem can transmit signals that could interfere with various onboard systems. Note: Some airlines may permit the use of cellular phones while the aircraft is on the ground and the door is open. Sierra Wireless modems may be used at this time. The driver or operator of any vehicle should not operate the Sierra Wireless modem while in control of a vehicle. Doing so will detract from the driver or operator's control and operation of that vehicle. In some states and provinces, operating such communications devices while in control of a vehicle is an offence. Limitation of Liability The information in this manual is subject to change without notice and does not represent a commitment on the part of Sierra Wireless. SIERRA WIRELESS AND ITS AFFILIATES SPECIFICALLY DISCLAIM LIABILITY FOR ANY AND ALL DIRECT, INDIRECT, SPECIAL, GENERAL, INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS OR REVENUE OR ANTICIPATED PROFITS OR REVENUE ARISING OUT OF THE USE OR INABILITY TO USE ANY SIERRA WIRELESS PRODUCT, EVEN IF SIERRA WIRELESS AND/OR ITS AFFILIATES HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR THEY ARE FORESEEABLE OR FOR CLAIMS BY ANY THIRD PARTY. Notwithstanding the foregoing, in no event shall Sierra Wireless and/or its affiliates aggregate liability arising under or in connection with the Sierra Wireless product, regardless of the number of events, occurrences, or claims giving rise to liability, be in excess of the price paid by the purchaser for the Sierra Wireless product. Rev 1 Apr.16 3 Specifications subject to change Hardware Integration Guide Patents This product may contain technology developed by or for Sierra Wireless Inc. This product includes technology licensed from QUALCOMM®. This product is manufactured or sold by Sierra Wireless Inc. or its affiliates under one or more patents licensed from InterDigital Group and MMP Portfolio Licensing. Copyright ©2016 Sierra Wireless. All rights reserved. Trademarks Sierra Wireless®, AirPrime®, AirVantage®, Skylight™, and the Sierra Wireless and Open AT logos are registered trademarks of Sierra Wireless, Inc. or one of its subsidiaries. Windows® is a registered trademark of Microsoft Corporation. QUALCOMM® is a registered trademark of QUALCOMM Incorporated. Used under license. Other trademarks are the property of their respective owners. Contact Information Sales Desk: Phone: 1-604-232-1488 Hours: 8:00 AM to 5:00 PM Pacific Time Contact: http://www.sierrawireless.com/sales Post: Sierra Wireless 13811 Wireless Way Richmond, BC Canada V6V 3A4 Technical support: support@sierrawireless.com RMA support: repairs@sierrawireless.com Fax: 1-604-231-1109 Web: www.sierrawireless.com Consult our website for up-to-date product descriptions, documentation, application notes, firmware upgrades, troubleshooting tips, and press releases: www.sierrawireless.com Revision History Revision number Release date Changes 1 April 2016 FCC / IC certification Specifications subject to change 4 4119157 Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2. Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Module Power States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3. RF Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Conducted Tx power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4. Routing Constraints and Recommendations . . . . . . . . . . . . . . . . . . . . . . 13 General Rules and Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 PCB Layout Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 PCB Specifications for the Application Board . . . . . . . . . . . . . . . . . . . . . . . 14 Recommended PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Routing Constraints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 UIM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 RF Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 USB Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Thermal Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 EMC and ESD Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Mechanical Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Signal Reference Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5. Regulatory Compliance and Industry Certifications . . . . . . . . . . . . . . . . 21 Important Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Safety and Hazards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Rev 1 Apr.16 5 Specifications subject to change Hardware Integration Guide Important Compliance Information for North American Users . . . . . . . . . . 22 Specifications subject to change 6 4119157 1 1: Introduction The AirPrime WP7504 is an industrial-grade LGA 239-pad module that provides voice and data connectivity on LTE, HSPA, WCDMA, and CDMA networks. The module also provides GNSS functionality as a SKU-configuration. Accessories A hardware development kit is available for AirPrime WP-series modules. The kit contains hardware components for evaluating and developing with the module, including: Rev 1 Apr.16 • Development board • Cables • Antennas (Additional antennas may be required to support all bands.) • Other accessories 7 Specifications subject to change Hardware Integration Guide Specifications subject to change 8 4119157 2 2: Power Power Supply The host provides power to the AirPrime WP7504 through multiple power and ground pins. The host must provide safe and continuous power at all times; the module does not have an independent power supply, or protection circuits to guard against electrical issues. For detailed pinout and voltage / current requirements of this module, see the AirPrime WP75XX Product Technical Specification. Module Power States The module has three main power states, as described in Table 2-1. Table 2-1: Supported Power States State Description Wake-Up Events OFF Module is off (no power to the system). Apply power for system to go to Active state. Apply power. Interrupt Simple wakeup sources are configured to interrupt from this power-saving state to the Active state. An event generated from a state change of RESET_IN_N or POWER_ON_N, or a timeout event. Active System wakes up (returns to fully active mode) automatically as required, or can be woken directly via wakeable GPIOs. The module may be fully functioning (WWAN radio and GNSS radio active), or be operating in airplane mode (WWAN radio off). Module actively reduces power consumption by disabling components that are not in use (for example, stepping down clock signals, putting USB bus into selective suspend, etc.) Rev 1 Apr.16 9 Specifications subject to change Hardware Integration Guide Specifications subject to change 10 4119157 3 3: RF Specifications The AirPrime WP7504 operates on the frequency bands listed below. Table 3-1: LTE Frequency Band Support Band Frequency (Tx) (MHz) Frequency (Rx) (MHz) B2 1850–1910 1930–1990 B4 1710–1755 2110–2155 B5 824–849 869–894 B12 699–716 729–746 B17 704–716 734–746 B25 1850–1915 1930–1995 B26 814–849 859–894 Table 3-2: WCDMA Frequency Band Support 1 Band Frequency (Tx) (MHz) Frequency (Rx) (MHz) B2 1850–1910 1930–1990 B4 1710–1755 2110–2155 B5 824–849 869–894 1. WCDMA channel spacing is 5 MHz, but this can be adjusted to optimize performance in a particular deployment scenario. Table 3-3: CDMA / EVDO Frequency Band Support 1 Band Frequency (Tx) (MHz) Frequency (Rx) (MHz) BC0 824–849 869–894 BC1 1850–1910 1930–1990 BC10 816–824 861–869 1. WCDMA channel spacing is 5 MHz, but this can be adjusted to optimize performance in a particular deployment scenario. Table 3-4: GNSS Frequency Band Support Rev 1 Apr.16 Band Frequencies (MHz) GPS 1575.42 ± 1.023 GLONASS 1597.52–1605.92 Galileo 1575.42 ± 2.046 11 Specifications subject to change Hardware Integration Guide Conducted Tx power Table 3-5: Conducted Tx Max Output Power Tolerances — LTE RF band Min (dBm) Typ (dBm) Max (dBm) Notes B2 22 23 24 Connectorized (Class 3) B4 22 23 24 Connectorized (Class 3) B5 22 23 24 Connectorized (Class 3) B12 22 23 24 Connectorized (Class 3) B17 22 23 24 Connectorized (Class 3) B25 22 23 24 Connectorized (Class 3) B26 22 23 24 Connectorized (Class 3) Table 3-6: Conducted Tx Max Output Power Tolerances — WCDMA RF band Min (dBm) Typ (dBm) Max (dBm) Notes B2 22 23 24 Connectorized (Class 3) B4 22 23 24 Connectorized (Class 3) B5 22 23 24 Connectorized (Class 3) Table 3-7: Conducted Tx Max Output Power Tolerances — CDMA / EVDO RF band Min (dBm) Typ (dBm) Max (dBm) BC0 22 23 24 Connectorized (Class 3) BC1 22 23 24 Connectorized (Class 3) BC10 22 23 24 Connectorized (Class 3) Specifications subject to change 12 Notes 4119157 4: Routing Constraints and Recommendations This section describes general routing constraints and recommendations for the AirPrime WP7504 module. Note: This is a non-exhaustive list of suggested design guidelines. The developer is responsible for deciding whether to implement these guidelines. General Rules and Recommendations Clock and other high-frequency digital signals (e.g. serial buses) should be routed as far as possible from the module’s analog signals. If the application design makes it possible, all analog signals should be separated from digital signals by a ground trace on the PCB. Tip: Avoid routing any signals under the module on the application board. PCB Layout Recommendations Ground pads should be re-flowed on to the host PCB with < 30% voiding to allow effective heat dissipation. Power Supply When designing the power supply, make sure that VBAT_BB / VBAT_RF meet the requirements listed in the WP75XX Product Technical Specification. Careful attention should be paid to the following: Rev 1 Apr.16 • Power supply quality — PFM, or PSM systems should be avoided; Low ripple, linear regulation or PWM converters are preferred for low noise. • Capacity to deliver high current peaks in a short time (for pulsed radio emission) • VBAT_BB / VBAT_RF must support peak currents with an acceptable voltage drop that guarantees the minimum required VBAT_BB / VBAT_RF value. • VBAT_BB / VBAT_RF signal pads must never exceed the maximum required VBAT_BB / VBAT_RF value, otherwise the module’s power amplifier and GPS chipset may be severely damaged. • A weakly-designed (not robust) power supply could affect EMC performance, the emission spectrum, and the phase error and frequency error. 13 Specifications subject to change 4 Hardware Integration Guide Antenna Sierra Wireless strongly recommends working with an antenna manufacturer either to develop an antenna adapted to the application, or to adapt an existing solution to the application. For information on routing constraints for the RF circuit, see RF Circuit on page 15. PCB Specifications for the Application Board Sensitive signals (such as audio, UIM, and clocks) should be protected by ground planes / fills. Routing sensitive signals close to noisy signals could result in noise being coupled. Recommended PCB Land Pattern Refer to the AirPrime WP8548 Customer Process Guidelines document, available at http://source.sierrawireless.com. Routing Constraints Power Supply If the following design recommendations are not followed, phase error (peak) and power loss could occur. • Since the maximum peak current can reach 2.5 A, Sierra Wireless strongly recommends having a large width for the layout of the power supply signal (to avoid voltage loss between the external power supply and VBAT_BB / VBAT_RF. Figure 4-1: Power Supply Routing Example Specifications subject to change 14 4119157 Routing Constraints and Recommendations Note: Figure 4-1 shows separate traces for VBAT_BB and VBAT_RF. If VBAT_BB and VBAT_RF share a single power supply, these traces should be connected. Note: For optimal decoupling, place the capacitors on the underside of the board, directly under the pins. • Filtering capacitors (100 nF to 1500 F) are recommended near the module’s power supply. • Attention should be paid to the ground trace or the ground plane on the application board for the power supply that supplies the module. The ground trace or ground plane, as well as the VBAT trace, must be able to support current peaks. • If the ground trace between the module and the power supply is a copper plane, make sure it is a solid plane. • Design routing to make sure total line impedance does not exceed 10 m @ 217 Hz. Ground Plane Connection The AirPrime WP7504 module requires a solid, central ground plane (with solder mask defined pads) located directly under the module. This will: • Ensure high current signal returns • Provide heat dissipation under higher operating temperatures The ground plane should be connected (with vias) to the reference ground layer of the application board. UIM Interface • The length of the tracks between the AirPrime WP7504 and the UIM socket should be as short as possible. Maximum recommended length is 10cm. • ESD protection is mandatory on the UIM lines unless there is no physical access to the UIM. • The decoupling capacitor(s) should be placed as close as possible to the UIM card connector for the UIM1_VCC signal. RF Circuit The RF signal must be routed on the application board using tracks with a 50 characteristic impedance. The characteristic impedance depends on the dielectric, the track width and the ground plane spacing. It is recommended to use stripline design if the RF path is fairly long (more than 3cm), since microstrip design is not shielded. Consequently, the RF (transmit) signal may interfere with neighboring electronic circuits. In the same way, the neighboring electronics (micro-controllers, etc.) may interfere with the RF (receive) signal and degrade the reception performance. Rev 1 Apr.16 15 Specifications subject to change Hardware Integration Guide USB Interface When the USB interface is externally accessible, ESD protection is required on the USB_VBUS, USB_D+, and USB_D- signals. Thermal Considerations When transmitting, the AirPrime WP7504 can generate significant amounts of heat (due to the internal Power Amplifier) that must be dissipated in the host device for safety and performance reasons. The amount of thermal dissipation required depends on the following factors: • Supply voltage — Maximum power dissipation for these modules can be up to 3 W at voltage supply limits. • Usage — Typical power dissipation values depend on the location within the host, amount of data transferred, etc. To enhance heat dissipation: • Maximize airflow over / around the module • Locate the module away from other components that generate heat • Ensure the module is connected to a solid ground plane EMC and ESD Recommendations EMC tests must be performed on the application as soon as possible to detect any potential problems. When designing, special attention should be paid to: • Possible spurious emissions radiated by the application to the RF receiver in the receiver band • ESD protection — Typically, ESD protection is mandatory for externally accessible signals, including: · VBAT_RF / VBAT_BB · UIM (if accessible from outside) · Serial link · USB · Antennas • Length of the UIM interface lines (preferably