FN980m TLB HW Design Guide r0

HW Design Guide Template
1VV0301651 Rev. 0 Page 9 of 25 2020-02-28
2. GENERAL PRODUCT DESCRIPTION
Overview
The Translation Board (TLB) is custom designed to interface the Telit module variant
FN980m with the Telit Generic Evaluation Board (EVB) thus forming the complete
Development Kit of FN980m.
The TLB provides the mapping of Telit module signals and functions into the generic EVB
signals and functions.
The FN980m TLB design includes the following items:
• FN980m module
• RF SMA connectors
• Board to Board connectors for interfacing to EVB main board
• Module specific circuitry which is not part of the generic circuitry of the EVB
The TLB also makes provision to assemble a custom designed module socket instead of
assembling the module.
Power supply and control interface for the RF module is provided from the EVB via the
B2B connectors.
To monitor the temperature, a thermistor is placed on the top GND plane, close to the
module which should be representative for the module’s backside temperature.
The bottom plane solder-mask is cutout below the RF module in order to optimally
mount/attach a heatsink aiming to cool the module via the many heat conducting GND
via’s.
The board is designed to accommodate new modules according FN980m M.2 (50 x 30.00
x 3.40mm, +/- 0.15 mm tolerance and 75 pins) updated pin mapping.
PCB reference numbers:
TLB CS2064D
EVB CS1742C, CS1942E
Module FN980m