R3110

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© Semiconductor Components Industries, LLC, 2015 February, 2015 − Rev. 1

1 Publication Order Number:

The RHYTHM /C0116 R3110 hybrid from ON Semiconductor is a pre−fit DSP system that is based on a two−channel compression circuit and designed for entry level hearing aids. With no need for software configuration nor that of storing audiology parameters via computer fitting, R3110 is a simple, cost−effective solution with many features found in high−end hearing aids, including Adaptive Noise Reduction and Adaptive Feedback Cancellation. R3110 is targeted at replacing aging analog solutions; it offers the same ease of use, yet provides the superior performance of digital technology. In its simplest configuration, a hearing aid build using R3110 only requires four external electronic components. Key Features and Benefits

• Pre−Fit Audiology Parameters− All sound−processing algorithms are preprogrammed to enable manufacturers to develop hearing aids in a variety of form−factors and to fit a wide range of hearing loss profiles. The device can also be configured for additional use−cases through hardware settings.
• Trimmer−Based Fitting− Up to four trimmers can be deployed, offering manufacturers the capability to modify most parameters that are important for patient fitting.
• Mode Control− Provides a variety of user control options: momentary or static switches, as well as an analog volume control.
• Adaptive Feedback Canceller− Automatically reduces acoustic feedback. It allows for an increase in stable gain while minimizing artifacts for music and tonal input signals
• Automatic Telecoil Support− Supports the use of telecoil devices, enabled either automatically with a magnetic sensitive switch or via an external switch
• Adaptive Noise Reduction− The adaptive noise reduction algorithm monitors signal and noise activities in 32 individual bands and carefully reduces noise
• Tinnitus Masking− A noise source can be enabled to mask tinnitus. The noise level is adjustable and mixed with the audio path. Spectral shaping is also possible using the high−cut and low−cut filters. www.onsemi.com PIN NUMBERING MARKING DIAGRAM See detailed ordering and shipping information on page 13 of this data sheet.

ORDERING INFORMATION

(Bottom View) 21−PAD HYBRID CASE 127DF R3110−CBAA = Specific Device Code ## = Work Order Number R3110−CBAA 789 15 16

• Trimmer−Based Fitting: ♦ Low−Cut Filter Corner Frequency ♦ High−Cut Filter Corner Frequency ♦ Wideband Gain ♦ Tinnitus Noise Level ♦ Output Limiting (AGC−O)
• Three Input Modes ♦ Simple Mode ♦ Advanced Mode ♦ Telecoil Mode
• Push Button Support
• Analog V olume Control
• Basic Acoustic Indicators
• High Quality 20−bit Audio Processing
• High Power/High Gain Capability
• 16 kHz sampling rate (8 kHz bandwidth)
• High Fidelity Audio CODEC
• 96 dB Input Dynamic Range
• Drives Zero−Bias Two−Terminal Receivers
• E1 RoHS−compliant Hybrid
• Hybrid Typical Dimensions: ♦ 200 x 122 x 39.4 mil (5.08 x 3.1 x 1.0 mm)
• R3110 is Pb−Free and RoHS Compliant BLOCK DIAGRAM

Figure 1. R3110 Block Diagram Table 1. ABSOLUTE MAXIMUM RATINGS should not be assumed, damage may occur and reliability may be affected. WARNING: Electrostatic Sensitive Device − Do not open packages or handle except at a static−free workstation. WARNING: Moisture Sensitive Device − RoHS Compliant; Level 4 MSL. Do not open packages except under controlled conditions.

Table 2. ELECTRICAL CHARACTERISTICS (Supply Voltage VB = 1.25 V; Temperature = 25°C) performance may not be indicated by the Electrical Characteristics if operated under different conditions.

Table 3. PIN CONNECTIONS

1 MIC Front microphone input A I

2 MGND Microphone ground P I

3 GND Ground P I

4 PGND Receiver ground P I

5 OUT+ Receiver positive output A O

6 OUT- Receiver negative output A O

7 VBP H−bridge power supply P I

8 VB Main power supply P I

9 MS Mode select D I RE PD

10 TC−EN Telecoil enable D I H PD

11 N/C No connect − −

12 VC Volume control A I

13 WG/NL Wideband gain / Tinnitus noise level A I

14 AGCO AGCO level A I

15 VREG Regulated voltage P O

16 TC−IN Telecoil input A I

17 N/C No connect − −

18 LC Low−cut filter control A I

19 HC High−cut filter control A I

20 N/C No connect − −

21 TN−EN Tinnitus noise enable D I H PD

Figure 2. A typical hearing device with R3110: Reference Schematic and Wiring Diagram

1. Simple Mode, which features two channels of
2. Advanced Mode, where the addition of Adaptive

in noisier listening environments. by tying the MS pin to the VB pin.

1. Telecoil Mode (TCM), where R3110 is not

to the Digital Signal Processing engine (DSP). PDM data stream, which is then supplied to the H−bridge. zero−biased hearing aid receivers. recommended high−power output filter. Figure 3. Typical High−Power Filter static 2−pole switch can be used to initiate such a transition. functionality is used, the MS pin (#9) shall be left floating. continuously sampled open over a 1.5 seconds period. refer to the Push Button Support section for additional details.

Figure 4. Wide Dynamic Range Compression two channels is set at 1.625 kHz.

• A low input level expansion (squelch) region with a compression ratio of 1:2
• A low input level linear region
• A compression region with a compression ratio of 1.6:1
• A high input level linear region (return to linear)
• A limited output region The configuration of the WDRC parameters has been calculated with a default microphone and receiver selection such that all the quantities shown on the graph represent acoustic quantities. As previously explained, any change in microphone or receiver characteristics and or sensitivities will result in a different behavior of the WDRC. In such cases, the WDRC parameters can easily be recalculated, knowing that the microphone sensitivity that was used is −126 dBV / dBSPL, and that the default receiver sensitivity that was used is of 115.4 dBSPL / dBV . The selected units for these sensitivities have been selected such that they are compatible with traditional software tools for other ON Semiconductor preconfigured products. As shown in Figure 4, one of the parameters that can be controlled is the Wideband Gain. A number of curves are shown, with the default value being the maximum wideband gain (0 dB). The minimum value for this parameter is −30 dB, which has quite some impact on the WDRC. A second and last parameter can be modified on R3110, is the limiting factor (AGCO). Figure 5, shows the input output curve for the default wideband gain configuration (0 dB), but with all the different options of the limiting factor and their impact on the output level.

Figure 5. Controlling the Output Limiter (AGC−O)

www.onsemi.com Adaptive Noise Reduction The Adaptive Noise Reduction (ANR) algorithm deploys a high resolution 32−band filter bank enabling precise reduction of noise. The algorithm monitors the signal−to− noise ratio activity in these bands, and calculates a separate attenuation gain for each of the 32 bands. Noise reduction has been included in the advanced hearing aid mode option which can be obtaind either by using a momentary memory select switch on MS1 (allowing the switching between Basic, Advanced and telelcoil mode) or by hard wiring MS to VB to automatically start in Advanced Mode. Third Generation Adaptive Feedback Canceller The third generation Adaptive Feedback Canceller (AFC) reduces acoustic feedback by calculating an estimate of the hearing aid feedback signal and then subtracting it from the hearing aid input signal. The forward path of the hearing aid is not affected. Unlike adaptive notch filter approaches, the AFC in R3110 does not reduce the hearing aid’s gain. The AFC is based on a time−domain model of the feedback path. The AFC allows for an increase in the stable gain of the hearing instrument while minimizing artefacts on music and tonal input signals. The AFC is fully automatic and is configured in R3110 to support all types of hearing aids, allowing a distance from receiver to microphone as low as 2 centimeters. AFC is available in Advanced Mode and can be selected via the MS pin with a push button or by hard wiring MS to VB. Analog Volume Control The external analog volume control works with a three−terminal 100 k/C0087 – 360 k/C0087 potentiometer connected between ground (GND) and the regulated voltage (VREG). The volume control shall have a linear taper. The potentiometer must be connected to the VC pin. It allows controlling the output attenuation from full scale down to approximately 42 dB under full scale. This volume control does not affect the tinnitus noise signal level when used. Trimmers R3110 is a pre -fit device for which all the sound−processing algorithm parameters have been preconfigured. Nonetheless, four parameters have been assigned to four trimmer pins (referred to as “configuration pins” throughout this document, allowing these parameters to be adjusted externally. The four configuration pins are the following:

• LC: Allows to configure the low−cut filter corner frequency
• HC: Allows to configure the high−cut filter corner frequency
• WG/NL: Allows adjusting either the wideband gain, or the tinnitus noise level, depending on the state of the TN−EN pin (enables the tinnitus noise generation algorithm). When configured for its Wideband Gain functionality (WG), this pin allows controlling the overall gain of the device as per the 16 values defined in Table 4. When used in its Noise Level (NL) functionality, it only scales the level of the generated tinnitus noise as per one of the 16 values also defined in Table 4.
• AGCO: Allows to select the maximum output signals to adjust to a particular receiver. The AGC−O module is an output limiting circuit with a fixed compression ratio of ∞ : 1. The limiting level is adjustable through the AGCO pin as a level measured in dB from full scale. The maximum output of the device is 0 dBFS. The AGC−O module has its own level detector, with fixed attack and release time constants. Figure 1 shows the signal path and the relative position of these filtering and amplification blocks in the audio path. There are three possible ways to use these configuration pins: 1. No configuration is performed; in this case, the four configuration pins are connected to VREG. R3110 will be using its predefined default values for all four parameters. The default values are defined by the configuration #16 in Table 4 below. 2. Resistive dividers are used to provide a fixed value to any of the parameters controlled by the four configuration pins. Table 4 shows parameter values related to corresponding configuration numbers (1 to 16). Figure 6 lists the corresponding component values to use in the resistive divider (R1 and R2). 3. A trimmer can be connected to any of the four configuration pins, allowing the parameter to be controlled by the audiologist or the end user. The trimmer shall be a three−terminal 100 k/C0087 linear taper. The range that the trimmer will offer is defined in Table 4. Maximum gains and frequency ranges are obtained with the default value set #16, which also corresponds to the default position of the trimmer, which is obtained when the trimmer is turned to its end position, clock wise.

Figure 6. 16 Configurations and their Resistor Values Table 4. PARAMETER VALUES AND RANGES

Table 4. The noise is injected into the audio path, as shown all inputs will be connected to MGND (MIC and TC−IN). MS pin can be left floating.

• Device startup ♦ Four sequential tones with the following audio frequencies: A4 (440 Hz), F4 (349 Hz), G4 (392 Hz), C4 (262 Hz)
• MS pin: mode switches with momentary push button ♦ Simple mode: one tone at the C5 audio frequency (523 Hz) ♦ Advanced mode: two sequential tones with increasing audio frequencies G4 (392 Hz) and C5 (523 Hz), 250 ms duration and 50 ms silence between the tones. ♦ Telecoil mode: three faded tones with increasing audio frequencies E4 (330 Hz), G4 (392 Hz) and C5 (523 Hz).
• TC−EN pin : telecoil mode enabled ♦ Four sequential tones with increasing audio frequencies C4 (262 Hz), E4 (330 Hz), G4 (392 Hz) and C5 (523 Hz).
• Low battery ♦ Three sequential tones with decreasing audio frequencies G4 (392 Hz), E4 (330 Hz) and C4 (262 Hz). All tones exhibit a nominal 32 ms fade−in and fade−out transition time. The duration of all the tones is 250 ms, and the silence duration between tones is 50 ms. The level of the tones is input referred and determined dynamically by R3110 based on the input signal level as well as the volume control. Power Management and Low Battery Warning As the voltage on the hearing aid battery decreases under

1.1 V , an audible warning signal is given to the user

on the instantaneous and average supply voltage levels. easy evaluation of the R3110 hybrid. Figure 7. Hybrid Jig

be useful when running tests that require this configuration.

1.5 V is applied to the VB pad during boot, R3110 will enter

maximum supply voltage as described in Table 1. voltage) regardless of how it entered Test Mode. differences, depending on the test signal used.

1. Download and unzip the files to the
2. Right click on the batch file name with the
3. Clicking on the desktop shortcut will launch the

R3110 Monitor utility with the correct parameters. Figure 8. Monitoring Utility

www.onsemi.com Device Marking Package Shipping† R3110−CBAA−E1T R3110−E1 21 Pad Hybrid 250 Units / Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Hybrid Jig Ordering Information To order a Hybrid Jig Evaluation Board for R3110, contact your Sales Account Manager or FAE and use part number R3110GEVB. Table 5. PAD POSITIONS AND DIMENSIONS

www.onsemi.com Package Dimensions ÈÈÈ ÈÈÈ ÈÈÈ SIP21, 3.10x5.08 CASE 127DF ISSUE O SEATING PLANE NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. COPLANARITY APPLIES TO THE SPHERICAL CROWNS OF THE SOLDER BALLS. 4. DIMENSIONS b, L, AND L1 ARE MEASURED AT THE SURFACE OF THE PACKAGE BODY . DIM A MIN MAX −−− MILLIMETERS b 0.470 0.546 e 0.686 BSC 1.14 E D A B PIN A1 INDICATOR 21X b B C C 0.07 0.17 DIMENSIONS: MILLIMETERS *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. SOLDERING FOOTPRINT* TOP VIEW SIDE VIEW BOTTOM VIEW A2 0.889 REF RECOMMENDED PACKAGE OUTLINE 123 A e1 1.029 BSC e2 0.965 BSC A e D E 0.10 C 0.10 C 0.05 C 0.13 C NOTE 3 A0.05 C NOTE 4 B 0.03 C

5.080 BSC

3.100 BSC

0.70 0.56 0.686 2.94 L 0.546 0.622 L1 0.673 0.749 567 17X L 4X L1 PITCH 21X 0.94 0.81 10X ON Semiconductor and the are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidia ries in the United States and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5817−1050 R3110/D LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative RHYTHM is a trademark of Semiconductor Components Industries, LLC.