GA3227 Datasheet, PDF (11/13 Pages) ON Semiconductor – Pre-configured DSP System

CONSOLIDATOR GA3227
The fourth option is to have the gain reduced as the battery
voltage drops. When the supply falls below the low battery
threshold the low battery tones will be emitted and the
wideband gain will be reduced by 3 dB. As the battery
voltage continues to drop, the low battery tones will
continue and the wideband gain will continue to be reduced
until the turn−OFF threshold is reached when the device will
shut down.
An additional option configurable via ARKonline is to
have the gain reduced as the battery voltage drops. When the
supply falls below the low battery threshold, the low battery
tones are emitted and the wideband gain is reduced by 3 dB.
As the battery voltage continues to drop, the low battery
tones continue and the wideband gain continues to be
reduced until the turn−OFF threshold is reached as the
device shuts down.
Current Consumption
Typical current consumption of the Consolidator GA3227
Digital, as stated in the Electrical Characteristics section, is
measured at a specific configuration and settings.
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 ARK Software
Guide.
SDA Communication
The Consolidator GA3227 Digital is programmed via the
SDA pin using industry standard programming boxes.
During parameter changes the main audio signal path of the
hybrid is temporarily disabled and replaced with a low gain
bypass path to avoid the generation of disturbing audio
transients. Once the changes are complete, the main audio
path is re−activated.
Any changes made during programming are lost at
power−off unless they are explicitly burned to EEPROM
memory.
Power Management
The Consolidator GA3227 Digital 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
Consolidator GA3227 has a separate power supply and
ground connection 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.
ORDERING INFORMATION
Device
GA3227−E1
GA3227−E1−T
Package
20 Pad Hybrid
20 Pad Hybrid
Shipping^†
25 Units / Bubble Pack
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 Evaluation Board for Consolidator GA3227 contact your Sales Account Manager or FAE and use part
number GA3227GEVB.
www.onsemi.com
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