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Related Manuals for Linear Technology Dust Networks Eterna LTP5901
Summary of Contents for Linear Technology Dust Networks Eterna LTP5901
- Page 1 Dust Networks Eterna LTP5901 / LTP5902 Integration Guide...
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Page 2: Table Of Contents
Table of Contents About This Guide ........................3 Audience ..................................3 Related Documents ..............................3 Conventions and Terminology............................3 Revision History.................................3 1 Design Guidelines....................... 4 Schematic Design ..............................4 Manager Variations –IPRA, -IPRB, -IPRC ......................4 PCB Layout ................................8 Eterna LTP5901 Recommended Land Pattern (Chip Antenna)................9 Eterna LTP5902 Recommended Land Pattern (MMCX) ..................11 Antenna ESD Considerations............................13 Supply Design................................13... -
Page 3: About This Guide
About This Guide This document provides the design guidelines essential for incorporating either an Eterna LTP5901 or LTP5902 module. The document covers design, layout, EMI, and some manufacturing considerations. Audience This document is intended for system developers, hardware designers, and layout engineers. Related Documents The following related documents are available: Eterna Serial Programmer Guide... -
Page 4: Design Guidelines
1 Design Guidelines Schematic Design The LTP5901 and LTP5902 require little external circuitry, as the devices references, decoupling and power supply filtering are integrated. The LTP5901 and LTP5902 have been modularly certified for operation in many geographies – see the ETERNA2 User’s Guide for the currently supported geographies and regulatory related specifications. - Page 5 representative for details on how to order license key certificates. The certificate contains a product key and instructions for requesting the generation of a license key, which typically takes one to two business days to receive a license key. License keys are entered via either the set config command documented in SmartMesh IP Manager CLI Guide or the setLicense...
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Page 6: Figure 2 Eterna Extended Memory Example Schematic
LPT5901IPC-IPRB 290-0007 ATL_PN=290-0003 VSUPPLY 100k 0201 RESERVED RADIO_INHIBIT RADIO_INHIBIT TIMEn GPIO17 TIMEn UART_TX GPIO18 UART_TX UART_TX_CTSn 100k GPIO19 UART_TX_CTSn UART_TX_RTSn 0201 AI_2 UART_TX_RTSn UART_RX NoStuf f AI_1 UART_RX UART_RX_CTSn AI_3 UART_RX_CTSn UART_RX_RTSn AI_0 UART_RX_RTSn VSUPPLY RESERVED VSUPPLY RESERVED RESETn RESETn eb_io_le1 FLASH_P_ENn/EB_IO_LE1 eb_io_oen... -
Page 7: Figure 3 Eterna Extended Memory Example Schematic
25 mil traces for VSUPPLY_M 0.1uF VSUPPLY_M 74AHC573 0402 DHVQFN20 VSUPPLY_M VSUPPLY_M 100k VSUPPLY eb_data_0 eb_addr_10 0201 eb_io_cs0n eb_data_1 eb_addr_11 eb_io_cs0n eb_io_le0 eb_data_2 eb_addr_12 STSOP32 eb_io_le0 eb_io_le1 eb_data_3 eb_addr_13 CY62138FV30LL-45ZAXI eb_io_le1 eb_io_le2 eb_data_4 eb_addr_14 eb_addr_11 eb_io_oen eb_io_le2 eb_addr_0 eb_data_5 eb_addr_15 eb_addr_9 eb_addr_10 eb_addr_0... -
Page 8: Pcb Layout
Reference Value Vendor Vendor P/N R2, R3, R11 100 kOhm Panasonic ERJ-1GEJ104C R14, R16 499 Ohm Vishay CRCW0201499RFKED 1 kOhm Panasonic ERJ-1GEJ102C 237 Ohm Vishay CRCW0402237RFKED C5, C7 30 pF Murata GRM0335C1E300JD01 C1, C2, C3, 100 nF Murata GRM155R71C104KA88 C4, C6 CY62128EV30LL- 128K x 8-bit RAM Cypress... -
Page 9: Eterna Ltp5901 Recommended Land Pattern (Chip Antenna)
generally cost more than powdered iron core inductors with similar electrical characteristics. Eterna LTP5901 Recommended Land Pattern (Chip Antenna) Two common practices for defining land patterns are Non Solder Mask Defined, NSMD, and Solder Mask Defined, SMD. Given the lead pitch of the LTP5901 and that tolerances for metal etch are commonly more precise than solder mask deposition, it is recommended to use NSMD land patterns. -
Page 10: Figure 4 Ltp5901 Land Pattern (Chip Antenna)
Figure 4 LTP5901 Land Pattern (Chip Antenna) LTP5901 LTP5902 I TERNA NTEGRATION UIDE... -
Page 11: Eterna Ltp5902 Recommended Land Pattern (Mmcx)
Eterna LTP5902 Recommended Land Pattern (MMCX) Two common practices for defining land patterns are Non Solder Mask Defined, NSMD, and Solder Mask Defined, SMD. Given the lead pitch of the LTP5902 and that tolerances for metal etch are commonly more precise than solder mask deposition, it is recommended to use NSMD land patterns. -
Page 12: Figure 5 Ltp5902 Land Pattern (Mmcx)
Figure 5 LTP5902 Land Pattern (MMCX) LTP5901 LTP5902 I TERNA NTEGRATION UIDE... -
Page 13: Antenna Esd Considerations
250 μA to 10 mA in less than 1 μs without generating a transient greater than 200 mV. For systems with regulated supplies, consultation with Linear Technology is strongly recommended. Eterna can be configured to support current limited supplies. Contact Linear Technology for details. Voltage Supervision and Reset... -
Page 14: Manufacturing Guidelines
2 Manufacturing Guidelines Reflow Given that Eterna modules are assembled using either “SAC305”, "Alpha OM-338 CSP" or " SMIC ECO M705-GRN360" No Clear Solder Paste, careful adherence to J-STD-020 to avoid reflowing the modules during the assembly process is necessary. The solder joint quality of the “castellations”... - Page 15 SmartMesh Industrial and Eterna are trademarks of Dust Networks, Inc. The Dust Networks logo, Dust, Dust Networks, and SmartMesh are registered trademarks of Dust Networks, Inc. The Linear logo is a registered trademark of Linear Technology Corporation. All third-party brand and product names are the trademarks of their respective owners and are used solely for informational purposes.
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