The GA3227 offers the unique benefits of Sound Design Technologies' high fidelity sound, wide bandwidth of 12 kHz and 95 dB of input dynamic range for trimmer or fully programmable digital hearing aids.

Four independent trimmer-based hearing aid controls provide flexible support for fine-tuning hearing aids to match patients' distinctive hearing correction needs while eliminating the need for complex fitting software. At the same time, GA3227 also contains intrinsic support for industry standard hearing-aid programmers such as HiPro, HiPro USB, NoaHlink, Microcard etc. enabling design of fully programmable hearing instruments.

High Power output drive capability of 138 dB SPL and support for up to 83 dB of electrical gain enables the GA3227 to be used in high-power hearing aid designs as well as mild to moderate hearing loss profiles. In addition to the above features, the GA3227 offers up to 2-channels of programmable WDRC signal processing, wideband level detection, choice of two AGC-I parametric adjustment strategies, optional peak clipping, programmable tones for memory change and low battery indicators along with three independent memory profiles which offers extreme flexibility for hearing instrument product designs.

• Efficient, high fidelity 1 or 2-channel WDRC signal processing
• Fully programmable via serial data interface
• One DLL operation
• Four trimmer inputs plus volume control or programmer controlled
• Flexible trimmer/parameter assignments
• Three-terminal trimmers
• Wideband level detection
• Choice of two AGC-I parametric adjustment strategies
• 6, 12 or 24 dB/octave band split filter or configurable as single-channel compressor.
• In-channel, low level squelch control (1:2 expansion)
• Output compression limiting (AGC-O)
• Flexible pre- and post-emphasis filters
• Three independent memories
• Pulse-density-modulated output stage drives zero-bias 2-terminal receivers
• Full ARK software support for fast TTM
• SOUNDFIT® turn-key fitting SW with customization options
• thinSTAX® packaging:
  • 0.150 x 0.250 x 0.046 in3
  • 3.80 x 6.35 x 1.17 mm3
• E1 RoHS Compliant Hybrid

thinSTAX® enabled 0.150 x 0.250 x 0.046 in3
[3.80 x 6.35 x 1.17 mm3]


SOUNDDesign®:

• 12 kHz Bandwidth
• 95 dB input dynamic range
• Ultra-low processing latency

Signal processing:

• 1 or 2 channel WDRC or Linear compression with fine control of crossover frequency placement
• Parametric filtering for frequency response smoothing
• In-channel low level expansion
• Up to 3:1 programmable compression ratio
• Wideband level detection
• AGC-O output limiting
• Minimum 20 bit end-to-end audio path
• 95dB input dynamic range with HRX™
• MIC or TCOIL input
• Advanced battery power management algorithms

Trimmer Functionality:

• 4 independent trimmers for high-resolution configuration

Improved hearing comfort:

• Low Battery Indicator
• 3 fully configurable memories with audible memory change indicator
• Configurable Amplitude and Frequency for low battery and memory changes

Fast time-to-market:

• Application Resource Kit (ARK) software, quickly configures the product for rapid product launches
• ARKonline® support, including easy-to-use Wizard for streamlined product component library creation
• Optional turn-key fitting software SOUNDFIT® with customization choices

Manufacturing Ease:

• Reflowable thinSTAX®:
  • 0.150 x 0.250 x 0.046 in3
  • 3.80 x 6.35 x 1.17 mm3
• E1 RoHS compliant environmentally friendly hybrid
• All pads located on the perimeter of the hybrid for easy inspection (no center pads)

To see this Block Diagram in higher resolution please click on the image.

• Data Sheet

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• Getting Started

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• Non-Product-Specific Documentation
• Software Packages