GA3284 Datasheet, PDF (1/15 Pages) ON Semiconductor – Pre-configured DSP System

INSPIRIA GA3284
Pre-configured DSP System
for Hearing Aids
Description
INSPIRIA GA3284 is designed on the cutting-edge features and
high performance.
The Inspiria GA3284’s Adaptive Noise Reduction capability
preserves perceived speech levels without causing distortion. It
monitors noise levels independently in 128 individual bands. This
strategy also employs advanced psychoacoustic models to eliminate
audible noise and reduce the amount of perceptible artifacts
introduced by the noise reduction process.
Based on a phase cancellation method, Inspiria GA3284’s adaptive
feedback reduction algorithm provides increased maximum stable
gain unlike other feedback cancellation strategies. Additionally, it
features rapid adjustment for dynamic feedback situations and
resistance to tonal inputs.
The Adaptive Directional Microphone (ADM) algorithm is a
two−microphone processing scheme. It is designed to automatically
reduce the level of sound sources that originate from behind or the side
of the hearing−aid wearer without affecting sounds from the front. The
algorithm accomplishes this by adjusting the null in the microphone
polar pattern to minimize the noise level at the output of the ADM.
Features
• Advanced Research
♦ 128−band Adaptive Noise Reduction
♦ Adaptive Feedback Cancellation
♦ Adaptive Directional Microphones
• 128−bit Fingerprint Security System and Other Security Features to
Protect Against Device Cloning and Software Piracy
• Soft Acoustic Fade Between Memory Changes
• FRONTWAVE^® Directional Processing
• High Fidelity Audio CODEC
• 20−bit Audio Precision
• 93 dB Input Dynamic Range with HRXt Headroom Extension
• 1, 2 or 4 Channel WDRC Compression
• 12−Band Graphic EQ
• 8 Biquadratic Filters
• Drives Zero−Bias 2−Terminal Receivers
• Four Analog Inputs
• Four Fully Configurable Memories with Audible Memory Change
Indicator
• Two Memory Select Pads
• Internal or External Volume Control with Programmable Range
• AGC−O with Variable Threshold, Time Constants, and Optional
Adaptive Release
• 16 kHz or 8 kHz Bandwidth
• Optimized Programming Speed
www.onsemi.com
16 PAD
HYBRID
CASE TBD
FMIC
PAD CONNECTION
MGND
15
16
1
VREG
RMIC 14
2 TIN
VC 13
SDA 12
GND 11
PGND 10
3 DAI
4
MS
5 MS2
6 VB
9
8
7
OUT+ OUT−
(Bottom View)
VBP
MARKING DIAGRAM
GA3284−E1
XXXXXX
GA3284 = Specific Device Code
E1
= RoHS Compliant Hybrid
XXXXXX = Work Order Number
ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of
this data sheet.
© Semiconductor Components Industries, LLC, 2015
1
August, 2015 − Rev. 6
Publication Order Number:
GA3284/D