SA3291_16 Datasheet, PDF (17/21 Pages) ON Semiconductor – Preconfigured Wireless DSP System

AYRE SA3291
This prevents a third party from potentially upgrading
a device with a different library in IDS or other
application software.
Full software support is provided for every stage of
development from design to manufacturing to fitting. For
details, refer to the Getting Started with the ARK Software
information note.
SDA and I²C Communication
The Ayre SA3291 can be programmed using the SDA or
I²C protocol. During parameter changes, the main audio
signal path of the hybrid is temporarily muted using the
memory switch fader to avoid the generation of disturbing
audio transients. Once the changes are complete, the main
audio path is reactivated. Any changes made during
programming are lost at power−off unless they are explicitly
burned to EEPROM memory.
Improvements have been made to the ARK software for
the Ayre SA3291 resulting in increased communication
speed. Certain parameters in ARKonline can be selected to
reduce the number of pages that need to be read out.
In SDA mode, the Ayre SA3291 is programmed via the
SDA pin using industry standard programming boxes. I²C
mode is a two wire interface which uses the SDA pin for
bidirectional data and CLK as the interface clock input. I²C
programming support is available on the HiPro (serial or
USB versions) and ON Semiconductor’s DSP
Programmer 3.0.
Power Supply Considerations
The Ayre SA3291 was designed to accommodate high
power applications. AC ripple on the supply can cause
instantaneous reduction of the battery’s voltage, potentially
disrupting the circuit’s function. The Ayre SA3291 hybrids
have a separate power supply and ground connections for the
output stage. This enables hearing instrument designers to
accommodate external RC filters to minimize any AC ripple
from the supply line. Reducing this AC ripple greatly
improves the stability of the circuit and prevents unwanted
reset of the circuit caused by spikes on the supply line.
For more information on properly designing a filter to
reduce supply ripple, refer to the Using DSP Hybrids in High
Power Applications Initial Design Tips information note
(AND9028).
Material Handling
It is recommended that any exposed material be dry baked
for a minimum of 37 hours ±1 hour at 90°C ±5°C before
storage again. For general handling specifications, please
refer to the ’How to Store, Reflow and Solder ON
Semiconductor Hybrids’ application note (AND8493).
ORDERING INFORMATION
Device
SA3291A−E1
Package
32 Pad Hybrid
Shipping^†
25 Units / Bubble Pack
SA3291A−E1−T
32 Pad Hybrid
250 Units / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
Hybrid Jig Ordering Information
To order a Hybrid Jig Kit for Ayre SA3291 contact your Sales Account Manager or FAE and use part number SA3410GEVK.
Kit includes:
− Two Ayre SA3291 Hybrid Jig Evaluation Boards
− Two NFMI Antennas
− Two Ayre SA3291 Hybrids
− Two Programming Cables
To order a Hybrid Jig Board for Ayre SA3291 contact your Sales Account Manager or FAE and use part number SA3410GEVB.
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