A8520E24A91 – User’s Manual Page 5 of 36
Release Date 01/23/15
Anaren Integrated Radio (AIR)
1. Overview
The A8520E24A91 module is a surface mount module integrating a CC8520PurePath™
wireless audio transceiver with the CC2591 PA/LNA device for increased range and an integral
antenna. The module incorporates a crystal, the required RF matching and filtering for
regulatory compliance as well as filtering on all digital lines for noise reduction and sensitivity.
The module operates in the global non-licensed 2.4GHz ISM/SRD frequency band. This radio
module is ideal for achieving low power, long range wireless connectivity without having to deal
with extensive protocol, RF, antenna design and regulatory compliance issues; as a result,
costs and time to market can be reduced significantly. The modules are 100% tested to provide
consistent performance.
The A8520E24A91 module has received regulatory approvals for modular devices in the United
States (FCC), Canada (IC) and Europe (ETSI). The modular approval allows the end user to
place an A8520E24A91 module inside a finished product without having to perform costly
regulatory testing for an intentional RF radiator. Section 2.3 has information on the requirements
for the end user/integrator to fulfill in order to use the modules without intentional radiator
regulatory testing.
This manual applies to both current and prior versions of the A8520E24A91 module, with the
following conditions:
Table 1 Module versions
Max PurePath
Power setting
X7J-A10051702
8975A-A10051701
X7J-A10051701
8975A-A10051701
The A8520E24A91 is based on the CC8520 transceiver and the CC2591 range extender chips,
both from Texas Instruments (TI). All control lines are provided at module level for full control of
its operation. Please see the datasheets for CC8520 and CC2591 (www.ti.com) for how to
operate, program and control the module. The PurePath™ protocol is developed, by TI,
specifically for the CC85xx series chips and specifically for digital audio distribution. At the
extremes of its range, the protocol provides graceful degradation of the audio signal using
algorithms like interpolation, to make intermittent connectivity inaudible. Thus the A8520E24A91
module is not suitable for strict data transport.
The module/protocol must be configured and programmed by the OEM/Integrator to setup the
specific Codec chip used for audio conversion, and to setup control buttons and
manufacturer/network addresses. This is described in detail in the CC8520 datasheet, users’
guide and PurePath™ documentation on TI website (www.ti.com). Specifics pertaining to
calibrating the transmit power from the module is covered in section 5.1.
The A8520E24A91 module measures 11 mm x 19 mm x 2.5 mm.
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