Specifications

January 13, 2021
Page 4/31
Document Ref: isp_lora_DS4520_R7
Insight SiP – Green Side – 400 avenue Roumanille – BP 309 – 06906 Sophia-Antipolis Cedex – France – www.insightsip.com
LoRa / BLE MODULE
ISP4520
1. Block Diagram
This module is based on the Semtech SX126x single-chip LoRa transceiver series and the nRF52832
Nordic Semiconductor 2.4GHz wireless System on Chip (SoC). It integrates a 32-bit ARM Cortex™ M4F
CPU, flash memory as well as analog and digital peripherals.
ISP4520 can support LoRa connectivity compliant to LoRa Alliance standards. LoRa section can be
used as a stand-alone transmitting module connected to a LoRaWAN network for long range
communication; or in a private LoRa network. SX1261 chipset is used for EU and AS variants, SX1262
for US variant.
ISP4520 also integrates a BLE connectivity compliant to Bluetooth V4.2. It can be used either in
Peripheral or Central roles for BLE. Fully qualified BLE stacks for nRF52832 are implemented in the
S132 SoftDevice which can be freely downloaded.
Despite the small size of 9.8 x 17.2 x 1.7 mm, the module integrates decoupling capacitors, 32 MHz
crystals for LoRa and BLE and 32.768 kHz crystal for BLE, DC-DC converters in addition to the wireless
SoCs. On the RF side, the ISP4520 also integrates the matching circuits for LoRa and BLE transmitters
and receivers, a switch for Rx/Tx LoRa transmissions and a diplexer with common antenna for LoRa and
BLE operation. Ultra-low power consumption and advanced power management enables battery
lifetimes up to several years on a coin cell battery.
2. Specifications