FRDM-KW40Z datasheet(12/37 Pages) FREESCALE

12 / 37 page

FRDM-KW40Z Freescale Freedom Development Board User’s Guide, Rev. 2, 10/2015

Freescale Semiconductor, Inc.

FRDM-KW40Z development board

4.2

Functional description

The FRDM-KW40Z board is built around Freescale MKW40Z SoC in a 48-pin LGA package. It features

an IEEE Std. 802.15.4 and BLE 2.4 GHz radio frequency transceiver and a Kinetis family ultra-low-power,

mixed-signal ARM Cortex-M0+ MCU in a single package. This board is intended as a simple evaluation

platform and as a building block for application development. The four-layer board provides the MKW40Z

SoC with its required RF circuitry, 32 MHz reference oscillator crystal, and power supply with a DC-DC

converter including Bypass, Buck, and Boost modes. The layout for this base-level functionality can be

used as a reference layout for your target board. This figure shows a simple functional block diagram:

Figure 6. FRDM-KW40Z board functional block diagram

4.2.1

RF performance and considerations

The FRDM-KW40Z board’s integrated transceiver includes a 1 mW nominal output power PA with

internal Voltage-Controlled Oscillator (VCO), integrated transmit/receive switch, on-board power supply

regulation, and full spread-spectrum encoding and decoding. The main specifications of the MKW40Z

SoC are:

•

Nominal output power is set to 0 dBm.

•

Programmable output power ranges from -20 dBm to +5 dBm at the SMA (no harmonic trap).

•

Typical sensitivity is -102 dBm (@1 % PER for 25 °C) at the SMA (802.15.4).

•

Typical sensitivity is -91 dBm (@1 % PER for 25 °C) at the SMA (BLE).

•

Frequency ranges from 2360 to 2480 MHz.

•

Differential bidirectional RF input/output port with integrated transmit/receive switch.

•

“F” printed-metal antenna for a small-footprint, low-cost design.

•

Minimum number of RF marching components and external 50:100 balun.

FRDM-KW40Z Datasheet(PDF) 12 Page - Freescale Semiconductor, Inc