GA3216 Datasheet, PDF (13/14 Pages) Gennum Corporation – FOUNDATION-TM Digital Single or Dual Channel DSP Compression System

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 3dB. 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.
CURRENT CONSUMPTION
Typical current consumption of the FOUNDATION Digital, as
stated in the Electrical Characteristics section, is measured
at a specific configuration and settings. If lower current is
desired, it can be achieved by selecting a 24kHz sampling
rate from the settings tab in IDS. This will reduce the
systems bandwidth from 16kHz to 12kHz.
POWER MANAGEMENT
The FOUNDATION Digital was designed to accommodate
high power applications. AC ripple on the supply can cause
instantaneous reduction of the battery's voltage, potentially
disruption the circuit's function. The GA3216 has a separate
power supply and ground connection for the output stage.
This allows hearing instrument designers to accommodate
external RC filters in order 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, please refer to information note "Using the GB3211
PARAGON Digital in High Power Application Initial Design
Tips" document #24561.
SOFTWARE
Full software support is provided for every stage of
development from design to manufacturing to fitting. Please
refer to the “Getting Started with ARK Guide,” document #
27217.
SDA COMMUNICATION
The FOUNDATION 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 disable 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 will be lost at
power-off unless they are explicitly burned to EEPROM
memory.
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