Advance acoustic Terra 128B Specifications download pdf

April, 2013 − Rev. 4

1 Publication Order Number:

R3710/D

RHYTHM R3710

Preconfigured DSP System

Description

RHYTHMt R3710 is a preconfigured DSP system designed

specifically for Invisible−In−Canal (IIC) hearing aid devices.

Available in the industry’s smallest hybrid form−factors, it is well

suited for hearing aid designs that are placed deep in the ear canal.

Using miniaturized advanced packaging techniques,

ON Semiconductor enables hearing aid manufacturers to take

advantage of the highly compact size to produce IIC hearing aids that

fit a greater portion of the market. Featuring iSceneDetectt

environmental classification, adaptive noise reduction, feedback

cancellation, and up to 8−channel WDRC, R3710 provides the

advanced features and performance level typically found in high−end

products.

Acoustic Environment Classification − The iSceneDetect

environmental classification algorithm is capable of analyzing the

hearing aid user’s acoustic environment and automatically optimizes

the hearing aid to maximize comfort and audibility.

iLogt 6.0 Datalogging − Enables the recording of various hearing

aid parameters such as program selection, volume setting and ambient

sound levels. The sampling interval can be configured to record from

every 4 seconds up to once every 60 minutes. The fitting system can

present the data to help the fitting specialist fine tune the hearing aid

and counsel the wearer during follow up visits.

Evoket Advanced Acoustic Indicators − Allows manufacturers

to provide more pleasing, multi−frequency tones simulating musical

notes or chords to indicate events such as program or volume changes.

Adaptive Feedback Canceller − Automatically reduces acoustic

feedback and allows for an increase in the stable gain while

minimizing artifacts for music and tonal input signals.

Adaptive Noise Reduction − The adaptive noise reduction

algorithm on R3710 monitors noise levels independently in 128

individual bands and employs advanced psychoacoustic models to

provide user comfort.

Tinnitus Masking − R3710 is equipped with a noise source that can

be used to mask tinnitus. The noise can be shaped, attenuated, and duty

cycled then summed into the audio path either before or after the

volume control.

In−situ Tone and Noise Generator − The narrow−band noise and

tone stimulus feature can be used for in−situ validation of the hearing

aid fitting. The frequency, level and duration of the stimuli are

individually adjustable.

http://onsemi.com

PAD CONNECTION

MARKING DIAGRAM

R3710

XXXXXX

R3710 = Specific Device Code

XXXXXX = Work Order Number

VIN2

VIN1

MS2

DVC

OUT+

OUT−

MS1

SDA

CLK

MGND VREG

GND2 GND1

(Bottom View)

161514

678

See detailed ordering and shipping information on page 15 o

this data sheet.

ORDERING INFORMATION

1 2 3 4 5 6 ... 17 18

Summary of Contents

Page 1 - Preconfigured DSP System

Page 2 - BLOCK DIAGRAM

RHYTHM R3710http://onsemi.com10with the rest of the audio through the device when the VC isadjusted. If the noise is injected after the VC then it is

Page 3

RHYTHM R3710http://onsemi.com11enabled it is highly recommended that the Squelch be turnedon in all channels and that the Squelch thresholds be setabo

Page 4

RHYTHM R3710http://onsemi.com12The behavior of the MS switches is controlled by two mainparameters in IDS.• MSSmode: this mode determines whether a co

Page 5

RHYTHM R3710http://onsemi.com13Mode 3: Static Switch on MS1 and MS2This mode uses two static switches to change memories.Table 8 describes which memor

Page 6

RHYTHM R3710http://onsemi.com14audio output being enabled. This gives the user time toproperly insert the hearing aid before the audio starts,avoiding

Page 7

RHYTHM R3710http://onsemi.com15from cloning a device’s EEPROM because thefingerprint cannot be overwritten. Special functions canbe used in fitting so

Page 8 - Adaptive Feedback Canceller

RHYTHM R3710http://onsemi.com16Table 10. PAD POSITION AND DIMENSIONS (mil)Pad No. Pad NamePad Position Pad DimensionsX Y Xdim Ydim1 VIN2 −71 44 23 232

Page 9

RHYTHM R3710http://onsemi.com17Table 11. PAD POSITION AND DIMENSIONS (mm)Pad No. Pad NamePad Position Pad DimensionsX Y Xdim Ydim1 VIN2 −1.8034 1.1176

Page 10

RHYTHM R3710http://onsemi.com18PACKAGE DIMENSIONSDimension units are in inches.Dimensions in parentheses are in millimeters, converted from inches and

Page 11

RHYTHM R3710http://onsemi.com2Other Key Features − R3710 also supports the followingfeatures: built−in feedback path measurement, cross fadingbetween

Page 12

RHYTHM R3710http://onsemi.com3SPECIFICATIONSTable 1. ABSOLUTE MAXIMUM RATINGSParameter Value UnitsOperating Temperature Range 0 to +40 °CStorage Tempe

Page 13

RHYTHM R3710http://onsemi.com4Table 2. ELECTRICAL CHARACTERISTICS (Supply Voltage VB = 1.25 V; Temperature = 25°C) (continued)Parameter UnitsMaxTypMin

Page 14

RHYTHM R3710http://onsemi.com5Table 3. I2C TIMINGParameter SymbolStandard Mode Fast ModeUnitsMin Max Min MaxClock Frequency fPC_CLK0 100 0 400 kHzHold

Page 15

RHYTHM R3710http://onsemi.com6Figure 2. I2C Mode Timing

Page 16

RHYTHM R3710http://onsemi.com7TYPICAL APPLICATIONS3k753k75LP FILTEROUTFigure 3. Test CircuitNoise Reduction (128 bands)Graphic EQ (16 bands)128 bandsW

Page 17

RHYTHM R3710http://onsemi.com8SIGNAL PATHThere are two inputs into the audio signal path. The firstinput is the front microphone and the second input

Page 18 - R3710−CEAA

RHYTHM R3710http://onsemi.com9Figure 5. Adaptive Feedback Canceller (AFC)Block DiagramGΣH’H+−Feedback pathEstimated feedbackFeedback Path Measurement