Specifications

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January, 2015 − Rev. 1

1 Publication Order Number:

SA3286/D

INSPIRIA SA3286

Pre-configured DSP System

for Hearing Aids

INSPIRIA SA3286 features iSceneDetectt environmental

classification, 128−bands of noise reduction, superior feedback

cancellation and built−in feedback path measurement capabilities. The

VOYAGEURt based hybrid sets a new standard of performance.

The iSceneDetect Environment Classification algorithm automatically

senses the hearing aid wearer’s environment and dynamically adjusts

hearing enhancement algorithms (such as Feedback cancellation, noise

reduction, compression, etc.) without user involvement.

Environment classification on Inspiria SA3286 enables programming

of hearing aid to a single program setting which can be employed by the

hearing−aid wearer in all environments instead of manually changing to

a different memory with a change in the acoustic environment.

The Inspiria SA3286 comes with EVOKEt advanced acoustic

indicators. EVOKE allows manufacturers to provide more complex,

multi−frequency tones which can simulate musical notes or chords.

The Inspiria SA3286 iLogt 2.0 Datalogging feature records various

parameters every 4 seconds to 60 minutes (programmable) during use of

the device. Once these parameter values are read from the device, they

can be used to counsel the hearing aid wearer and fine tune the fitting.

The Inspiria SA3286’s Adaptive Noise Reduction monitors noise

levels independently in 128 individual bands and employs advanced

psychoacoustic models to provide user comfort.

Based on a phase cancellation method, Inspiria SA3286’s adaptive

feedback reduction algorithm provides an increase in added stable

gain. It features rapid adjustment for dynamic feedback situations and

resistance to tonal inputs.

Automatic Adaptive Directional Microphone (ADM) algorithm

from ON Semiconductor automatically reduces the level of sound

sources that originate from behind or the side of the hearing−aid

wearer without affecting sounds from the front by adjusting the null in

the microphone polar pattern to minimize the noise level at the output

of the ADM. To reduce current consumption, the algorithm can switch

automatically between 1 mic omni and ADM depending on the

acoustic environment.

The Inspiria SA3286 is equipped with a noise source that can be

used in treating tinnitus. The Tinnitus Treatment noise can be shaped

and attenuated and then summed into the audio path either before or

after the volume control.

The Narrow−band Noise Stimulus feature allows the user to generate

stimuli from the device that can be used for in situ audiometry.

In addition to these adaptive algorithms, the Inspiria SA3286 also

supports the following features: up to 8 channel WDRC,

FRONTWAVE

directional processing, cross fading between audio

paths for click−free memory changes, 16−band graphic equalizer, 8

generic biquad filters (configurable as parametric or other filter types),

programming speed enhancements, optional peak clipping, flexible

compression adjustments, volume control, rocker switch, and

industry−leading security features to avoid cloning and software piracy.

www.onsemi.com

16 PAD

HYBRID

CASE TBD

VREG

TIN

DAI

MS2

VBP

OUT−OUT+

MGND

PAD CONNECTION

FMIC

RMIC

SDA

GND

PGND

MARKING DIAGRAM

SA3286−E1

XXXXXX

SA3286 = Specific Device Code

E1 = RoHS Compliant Hybrid

XXXXXX = Work Order Number

(Bottom View)

See detailed ordering and shipping information on page 14 of

this data sheet.

ORDERING INFORMATION

Summary of content (16 pages)

PAGE 1
INSPIRIA SA3286 Pre-configured DSP System for Hearing Aids INSPIRIA SA3286 features iSceneDetect t environmental classification, 128−bands of noise reduction, superior feedback cancellation and built−in feedback path measurement capabilities. The VOYAGEURt based hybrid sets a new standard of performance.
PAGE 2
INSPIRIA SA3286 Features • Advanced Research • Four Fully Configurable Memories with Audible 128−band Adaptive Noise Reduction ♦ Adaptive Feedback Cancellation ♦ Feedback Path Measurement Tool ♦ Automatic Adaptive Directional Microphones ♦ Environmental Classification iSceneDetect Environmental Classification 1.0 iLog Datalogging 2.
PAGE 3
INSPIRIA SA3286 Table 1. ABSOLUTE MAXIMUM RATINGS Parameter Value Units 0 to +40 °C −20 to +70 °C Absolute Maximum Power Dissipation 25 mW Maximum Operating Supply Voltage 1.5 VDC Absolute Maximum Supply Voltage 2 VDC Operating Temperature Range Storage Temperature Range Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected.
PAGE 4
INSPIRIA SA3286 Table 2. ELECTRICAL CHARACTERISTICS (VBAT = 1.25 V; Temperature = 25°C) (Note 2) Parameter Symbol Conditions Min Typ Max Units − − − 88 − dB ZOUT − − − 15 W RVC Two−terminal connection 160 200 240 kW Three−terminal connection 100 − 1000 DA − 1 − 42 dB Logic 0 Voltage − − 0 − 0.3 V Logic 1 Voltage − − 1 − 1.3 V Standby Pull Up Current − − 1.4 5 6.
PAGE 5
INSPIRIA SA3286 TYPICAL APPLICATIONS VB 5 Voltage Regulator 1 Acoustic Indicators Memory Select Σ Post Biquad Filters 15 A/D 3k9 14 3k9 3 MIC/ TCOIL Comp A/D M U X 2 1k 6 4 * 16 Programming Interface Cross Fader ** OUT D/A HBridge Peak Clipper Σ Volume Control AGCO 8 9 LP Filter 10 Wide− band Gain Control A/D 13 200 k Post Biquad Filters Environmental Classification 128 bands Frequency Band Analysis 7 Noise Generator and Shaper Feedback Canceller Pre Biquad Filters 1k
PAGE 6
INSPIRIA SA3286 T−coil + MS switch (N.O.) − Front Mic + Zero Biased Receiver Rear Mic + VC CS44 Figure 4. Typical Hearing Instrument Assembly Diagram INSPIRIA SA3286 Overview Inspiria SA3286 is a DSP system with adaptive algorithms that run on the Voyageur hardware platform. This hardware platform is a combination of a DSP core and a high fidelity audio CODEC. The thinSTAX packaging provides easy integration into a wide range of applications from CIC to BTE.
PAGE 7
INSPIRIA SA3286 In the Telecoil mode gains are trimmed during Cal/Config process to compensate for microphone/telecoil mismatches. The FrontWave block is followed by four cascaded biquad filters: pre1, pre2, pre3 and pre4. These filters can be used for frequency response shaping before the signal goes through channel and adaptive processing.
PAGE 8
INSPIRIA SA3286 Feedback path + − Directional Microphones H In any directional mode, the circuitry includes a fixed filter for compensating the sensitivity and frequency response differences between microphones. The filter parameters are adjusted during product calibration. A dedicated biquad filter following the directional block has been allocated for low frequency equalization to compensate for the 6 dB/octave roll−off in frequency response that occurs in directional mode.
PAGE 9
INSPIRIA SA3286 Tinnitus Treatment reduce current consumption. While in this omni−directional state, the algorithm will periodically check for conditions warranting the enabling of the adaptive directional microphone. The Inspiria SA3286 has an internal white noise generator that can be used for Tinnitus Treatment. The noise can be attenuated to a level that will either mask or draw attenuation away from the user’s tinnitus.
PAGE 10
INSPIRIA SA3286 HRX Head Room Expander The number of compression channels is programmable in ARKonline® and can be 1, 2, 4, 6 or 8. The Inspiria SA3286 has an enhanced Head Room Expander (HRX) circuit that increases the input dynamic range of the Inspiria SA3286 without any audible artifacts. This is accomplished by dynamically adjusting the pre−amplifier’s gain and the post−A/D attenuation depending on the input level. Telecoil Path The telecoil input is calibrated during the Cal/Config process.
PAGE 11
INSPIRIA SA3286 Biquad Filters Volume Control Additional frequency shaping can be achieved by configuring generic biquad filters. The transfer function for each of the biquad filters is as follows: The Volume Control (VC) can be either external or programmable. If external VC operation is selected, a further decision is required as to whether a variable resistor (analog VC) or a Digital Volume Control (DVC) will be connected to the 9−bit A/D converter.
PAGE 12
INSPIRIA SA3286 Example: If 4 valid memories: ABCDABCDA… If 3 valid memories: ABCABCA… If 2 valid memories: ABABA… If 1 valid memories: AAA… Memory Select Switches One or two, two−pole Memory Select (MS) switches can be used with the Inspiria SA3286. This enables users tremendous flexibility in switching between configurations. These switches may be either momentary or static and are configurable to be either pull−up or pull−down through the settings tab in IDS.
PAGE 13
INSPIRIA SA3286 output turns on by smoothly transitioning to the expected output level. During normal operation, when a low battery condition is detected, the Inspiria SA3286 hybrid plays out a configurable acoustic indicator to indicate that the battery is low. This is repeated every five minutes until the device reaches the turn−OFF threshold. The low battery threshold is programmable in IDS between 1.0 V and 1.2 V in 10 mV increments.
PAGE 14
INSPIRIA SA3286 • DLL to hybrid pairing by using a software key in ARK output reduction are applied) while monitoring the supply voltage. If the supply voltage remains above the turn−ON threshold for at least 30 secs, the device is allowed to exit transient reboot mode. The device returns to shallow−reset mode and the maximum output is restored.
PAGE 15
INSPIRIA SA3286 Table 6. PAD POSITION AND DIMENSIONS Pad Position Pad Dimensions Pad No. X Y Xdim (mil) Ydim (mil) 1 0 0 18 38 2 29 5.75 20 26.5 3 59.25 5.75 20.5 26.5 4 91.5 8.5 24 21 5 124 5.75 19 26.5 6 154.25 1.75 21.5 34.5 7 183.5 1.75 17 34.5 8 171.25 −33.75 41.5 16.5 9 182.25 −66.5 19.5 29 10 147 −71.5 26 39 11 113.75 −66.5 20.5 49 12 84.5 −76 18 30 13 56.25 −76 18.5 30 14 27.25 −73.25 18.5 35.5 15 −0.5 −73.25 17 35.
PAGE 16
INSPIRIA SA3286 PACKAGE DIMENSIONS 0.215 (5.46) SA3286 − E1 0.124 (3.15) XXXXXX 0.072 MAX (1.83) (0.406) 0.016 (0.660) 0.026 Dimension units are in inches. Dimensions in parentheses are in millimeters, converted from inches and include minor rounding errors. 1.000 inches = 25.4mm Dimension tolerances: ±0.005 (±0.13) unless otherwise stated. • = location of Pin 1 RoHS compliant hybrid, MSL#4, 240°C peak reflow, SAC305.