GA3227 Datasheet, PDF (1/13 Pages) ON Semiconductor – Pre-configured DSP System

CONSOLIDATOR GA3227
Pre-configured DSP System
for Hearing Aids
Description
The CONSOLIDATOR GA3227 hybrid is a DSP system based on a
two−channel compression circuit. It can be configured as a single
channel linear device or a single, or dual, channel WDRC device. It
can efficiently replace traditional analog hearing aid compression
circuits without compromising fundamental performance
requirements.
The Consolidator GA3227 hybrid can be configured as an extended
programmable circuit or a trimmer circuit supporting manual
configuration. As a trimmer circuit, it continuously monitors trimmer
positions and translates them into the hearing aid parameters of choice.
Also included in the Consolidator GA3227 is an in channel squelch
circuit used to attenuate microphone and circuit noise in quiet
environments, containing low distortion compression limiting,
programmable high and low cut filters, and a fully accessible
bi−quadratic filter.
The hybrid code programmed into the Consolidator GA3227
controller chip is ‘2’.
Features
• 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
• These Devices are Pb−Free and are RoHS Compliant
Standard Packaging
• Hybrid Typical Dimensions:
0.150 x 0.250 x 0.046 in.
(3.81 x 6.35 x 1.17 mm)
www.onsemi.com
20 PAD
HYBRID
CASE TBD
PAD CONNECTION
VREG VREG2 VIN
GND2 17 18 19 20 1 TIN
GND 16
2 MGND
VC 15
3 TR3
TR1 14
4 TR4
TR2 13
5 VB
MS2 12
6 PGND
MS1 11 10 9
8 7 VBP
SDA OUT+ OUT−
(Bottom View)
MARKING DIAGRAM
GA3227−E1
XXXXXX
GA3227
E1
XXXXXX
= Specific Device Code
= RoHS Compliant Hybrid
= Work Order Number
ORDERING INFORMATION
See detailed ordering and shipping information on page 11 of
this data sheet.
© Semiconductor Components Industries, LLC, 2014
1
January, 2015 − Rev. 6
Publication Order Number:
GA3227/D