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? semiconductor components industries, llc, 2015 september, 2016 ? rev. 5 1 publication order number: R3920/d rhythm R3920 preconfigured dsp system for hearing aids description rhythm R3920 is a preconfigured hearing health processor based on a dsp platform. featuring 16 channels of wide dynamic range compression and impulse noise reduction, R3920 encompasses a rich set of advanced sound processing algorithms and is ideal for high end, full-featured hearing aids. the R3920 hybrid is available in one of the industry?s smallest form-factors and is well-suited for all hearing aid types, including those placed deep in the ear canal. features and benefits wide dynamic range compression (wdrc) ? R3920 contains 16 channels of wide dynamic range compression, each with individual settings for squelch attentuation and threshold, low level gain, high level gain, upper and lower thresholds, and compression ratio. independent level detectors for both squelch and wdrc are available with customizable attack and release times set in each channel. impulse noise reduction (inr) ? loud , impulsive sounds in the environment such as slamming doors, dropped items, or clattering dishes can become uncomfortably or dangerously loud in a traditional hearing aid. the inr algorithm actively monitors and processes the incoming acoustic signal for such sounds. it ensures that the output sound preserves the integrity of the speech signal and is descriptive of the environment, while maintaining an optimal comfort level for the hearing aid user. acoustic environment classification ? iscenedetect analyzes incoming acoustic signals in order to determine the appropriate classification for a given acoustic environment. six separate environments are supported by iscenedetect: quiet, speech in quiet, noise, speech in noise, music, and wind. the feature uses this classification to automatically adjust settings of other features for optimum audio performance. ilog 4.0 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 manufacturer can program the fitting system to retrieve the data for further analysis after an extensive period of wearing the hearing aid. this allows the audiologist to fine tune the hearing aid and further counsel the end-user. automatic adaptive directionality ? the automatic adaptive directional microphone (adm) algorithm automatically reduces the level of sound sources that originate from behind or to the side of the hearing aid wearer without affecting sounds from the front. the algorithm can also gather input from the acoustic iscenedetect environmental classifier algorithm and automatically select whether directionality is needed or not, translating into additional current savings. www. onsemi.com 25 pad hybrid case 127dn pad connection marking diagram R3920?cfab xxxxxx R3920?cfab = specific device code xxxxxx = work order number (bottom view) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 vin1 19 ard1 20 ard2 21 n/c 22 n/c 23 n/c 25 24 vin2 tin dai vc d_vc sda clk ms1 vreg mgnd gnd pgnd out+ out? vbp vb ms2 n/c n/c see detailed ordering and shipping information on page 9 o f this data sheet. ordering information
rhythm R3920 www. onsemi.com 2 adaptive feedback canceller ? automatically reduces acoustic feedback. it allows for an increase in the stable gain while minimizing artifacts for music and tonal input signals. additional tuning parameters make for more precise tuning of the algorithm to the hearing aid. the development tools for the R3920 offer a special calibration module to help assess the maximum stable gain in the hearing aid the manufacturer has built to further optimize the adaptive feedback canceller algorithm. adaptive noise reduction ? the adaptive noise reduction algorithm monitors noise levels independently in 128 individual bands and employs advanced psychoacoustic models to reduce noise and provide user comfort. the algorithm can be set for varying levels of aggressiveness from 3 db up to 12 db. automatic receiver detection ? for receiver?in?canal (ric) devices with field replaceable receivers, R3920 allows manufacturers to code different receiver types so they are automatically recognizable in software, eliminating potential selection errors. tinnitus masking ? R3920 is equipped with a noise source that can be used to mask tinnitus. the noise can be shaped and attenuated and then summed into the audio path either before or after the volume control. a white noise signal is generated and inserted into the audio path either before or after the volume control. filtering can be performed on the white noise signal in order to shape the noise signal to a desired frequency and bandwidth. the tinnitus masker can be used as a stand alone tinnitus making device or as part of a hearing aid. evoke advanced acoustic indicators ? allows hearing aid manufacturers to provide more pleasing, multi?frequency tones simulating musical notes or chords to indicate events such as program or volume changes. in?situ t one generator ? the narrow?band noise 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. other key features ? R3920 also supports the following features: frontwave ? directional processing, built?in feedback path measurement, cross fading between audio paths for click?free program 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, direct interfaces to analog or digital volume control, rocker switch, direct audio input and telecoil. rhythm R3920 also encompasses industry?leading security features to avoid cloning and software piracy. support tools ? hybrid jig ? dsp3 programming box ? ark software support features ? 16 channel wdrc ? advanced research algorithms: ? impulse noise reduction (inr) ? iscenedetect environmental classification ? automatic adaptive directional microphones (adm) ? frontwave directionality ? 128?band adaptive noise reduction ? next?generation adaptive feedback cancellation (afc) ? ilog 4.0 datalogging ? tinnitus masking noise generator ? evoke acoustic indicators ? auto telecoil with programmable delay ? feedback path measurement tool ? agc?o with v ariable threshold, time constants, and optional adaptive release ? 16?band graphic equalizer ? narrow?band noise stimulus ? sda or i 2 c programming ? 8 biquadratic filters ? 4 analog inputs ? 16 khz or 8 khz bandwidth ? 6 fully configurable memories with audible memory change indicator ? 96 db input dynamic range with hrx headroom extension ? 128?bit fingerprint security system and other security features to protect against device cloning and software piracy ? high fidelity audio codec ? soft acoustic fade between memory changes ? drives zero?bias 2?t erminal receivers ? internal or external digital volume control with programmable range ? digital volume control level retention after power cycle ? rocker switch support ? support for active hi or active lo switching ? 20?bit audio processing ? thinstax ? packaging ? e1 rohs compliant hybrid ? these devices are pb?free and are rohs compliant packaging information ? hybrid typical dimensions: 0.220 x 0.125 x 0.060 in. (5.59 x 3.18 x 1.52 mm)
rhythm R3920 www. onsemi.com 3 figure 1. hybrid block diagram block diagram R3920 v b programming interface eeprom control a/d a/d a/d clock generator por circuitry cross fader mic/tcoil comp agc?o feedback canceller frequency band analysis frequency band synthesis wideband voltage regulator volume control pre biquad filters adaptive directional microphone * ** data logging noise reduction impulse noise reduction (inr) and shaper noise generator gain zero biased receiver 2 15 16 17 18 1 10 9 12 14 8 7 5 3 11 13 23 22 21 20 19 wdrc (16 channels) graphic eq (16 bands) control (ms/digvc) environmental classification post biquad filters 1 & 2 m u x post biquad filters 3 & 4 d/a hbridge peak clipper acoustic indicators
rhythm R3920 www. onsemi.com 4 specifications table 1. absolute maximum ratings parameter value units operating temperature range 0 to +40 c storage temperature range ?20 to +70 c absolute maximum power dissipation 50 mw maximum operating supply voltage 1.65 vdc absolute maximum supply voltage 1.8 vdc stresses exceeding those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device function ality 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 v b = 1.25 v; temperature = 25 c) parameter symbol conditions min typ max units minimum operating supply voltage v boff ramp down, audio path 0.93 0.95 0.97 v ramp down, control logic 0.77 0.80 0.83 supply voltage turn on threshold v bon ramp up, zinc?air 1.06 1.10 1.16 v ramp up, nimh 1.16 1.20 1.24 hybrid current all functions, 32 khz sampling rate ? 730 ? a all functions, 16 khz sampling rate ? 620 ? eeprom burn cycles ? ? 100 k ? ? cycles low frequency system limit ? ? ? 125 ? hz high frequency system limit ? ? ? 16 ? khz total harmonic distortion thd v in = ?40 dbv ? ? 1 % thd at maximum input thd m v in = ?15 dbv, hrx ? on ? ? 3 % clock frequency f clk ? 3.973 4.096 4.218 mhz regulator regulator voltage v reg ? 0.87 0.90 0.93 v system psrr psrr sys 1 khz, input referred, hrx enabled ? 70 ? db input input referred noise irn bandwidth 100 hz ? 8 khz ? ?108 ?106 dbv input impedance z in 1 khz ? 3 ? m anti?aliasing filter rejection ? f = [dc ? 112 khz], v in = ?40 dbv ? 80 ? db crosstalk ? between both a/d and mux ? 60 ? db maximum input level ? ? ? ?15 ?13 dbv analogue input voltage range v an_in v in1 , v in2 , al 0 ? 800 mv v an_tin t in ?100 ? 800 input dynamic range ? hrx ? on bandwidth 100 hz ? 8 khz ? 95 96 db audio sampling rate ? ? 8 ? 48 khz output d/a dynamic range ? 100 hz ? 8 khz ? 88 ? db output impedance z out ? ? 10 13
rhythm R3920 www. onsemi.com 5 table 2. electrical characteristics (supply voltage v b = 1.25 v; temperature = 25 c) parameter units max typ min conditions symbol control a/d resolution (monotonic) ? ? 7 ? ? bits zero scale level ? ? ? 0 ? v full scale level ? ? ? v reg ? v volume control volume control resistance r vc three?terminal connection 200 ? 1000 k volume control range ? ? ? ? 42 db pc_sda input logic 0 voltage ? ? 0 ? 0.3 v logic 1 voltage ? ? 1 ? 1.25 v pc_sda output stand?by pull up current ? creftrim = 6 3 5 6.5 a sync pull up current ? creftrim = 6 748 880 1020 a max sync pull up current ? creftrim = 15 ? 1380 ? a min sync pull up current ? creftrim = 0 ? 550 ? a logic 0 current (pull down) ? creftrim = 6 374 440 506 a logic 1 current (pull up) ? creftrim = 6 374 440 506 a synchronization time (synchronization pulse width) t sync baud = 0 237 250 263 s baud = 1 118 125 132 baud = 2 59 62.5 66 baud = 3 29.76 31.25 32.81 baud = 4 14.88 15.63 16.41 baud = 5 7.44 7.81 8.20 baud = 6 3.72 3.91 4.10 baud = 7 1.86 1.95 2.05 product parametric performance is indicated in the electrical characteristics for the listed test conditions, unless otherwise noted. product performance may not be indicated by the electrical characteristics if operated under different conditions.
rhythm R3920 www. onsemi.com 6 table 3. i 2 c timing parameter symbol standard mode fast mode units min max min max clock frequency f pc_clk 0 100 0 400 khz hold time (repeated) start condition. after this period, the first clock pulse is generated. t hd;sta 4.0 ? 0.6 ? sec low period of the pc_clk clock t low 4.7 ? ? ? sec high period of the pc_clk clock t high 4.0 ? ? ? sec set?up time for a repeated start condition t su;sta 4.7 ? ? ? sec data hold time: for cbus compatible masters for i 2 c?bus devices t hd;dat 5.0 0 (note 1) ? 3.45 (note 2) ? 0 (note 1) ? 0.9 (note 2) sec data set?up time t su;dat 250 ? 100 ? nsec rise time of both pc_sda and pc_clk signals t r ? 1000 20 + 0.1 c b (note 4) 300 nsec fall time of both pc_sda and pc_clk signals t f ? 300 20 + 0.1 c b (note 4) 300 nsec set?up time for stop condition t su;sto 4.0 ? 0.6 ? nsec bus free time between a stop and start condition t buf 4.7 ? 1.3 ? sec output fall time from v ihmin to v ilmax with a bus capacitance from 10 pf to 400 pf t of ? 250 20 + 0.1 c b 250 nsec pulse width of spikes which must be suppressed by the input filter t sp n/a n/a 0 50 nsec capacitive load for each bus line c b ? 400 ? 400 pf 1. a device must internally provide a hold time of at least 300 ns for the pc_sda signal to bridge the undefined region of the f alling edge of pc_clk. 2. the maximum t hd;dat has only to be met if the device does not stretch the low period (t low ) of the pc_clk signal. 3. a fast?mode i 2 c?bus device can be used in a standard?mode i 2 c?bus system, but the requirement t su;dat p250ns must then be met. this will automatically be the case if the device does not stretch the low period of the pc_clk signal. if such a device does s tretch the low period of the pc_clk signal, it must output the next data bit to the pc_sda line t r max + t su;dat = 1000 + 250 = 1250 ns (according to the standard?mode i 2 c?bus specification) before the pc_clk line is released. 4. c b = total capacitance of one bus line in pf.
rhythm R3920 www. onsemi.com 7 figure 2. i 2 c mode timing
rhythm R3920 www. onsemi.com 8 typical applications figure 3. test circuit * if input mode = 1 mic omni, mic + telecoil, mic + dai ** if input mode = 2 mic omni, rear only, directional note: all resistors in ohms and all capacitors in farads, unless otherwise stated. lp filter out 200k 3 programming interface eeprom m u x d/a hbridge peak clipper control a/d a/d a/d clock generator por circuitry cross fader mic/tcoil comp agco feedback canceller frequency band analysis frequency ba n d synthesis wideband 128 bands voltage regulator volume control pre bi q ua d filters adaptive directional microphone or frontwave * ** data logging acoustic indicators and shaper noise generator post biquad filters 1 & 2 gain environmental classification control (ms/digvc) post biquad filters 3 & 4 3k75 3k75 3k75 3k75 v b 23 22 21 20 19 8 7 5 6 4 10 9 14 13 2 15 16 17 18 1 12 11 R3920 impulse noise reduction (inr) graphic eq (16 bands) noise reduction wdrc (16 channels) figure 4. typical application circuit * if input mode = 1 mic omni, mic + telecoil, mic + dai ** if input mode = 2 mic omni, rear only, directional note: all resistors in ohms and all capacitors in farads, unless otherwise stated. v b programming interface eeprom m u x d/a hbridge peak clipper control a/d a/d a/d clock generator por circuitry cross fader mic/tcoil comp agco feedback canceller graphic eq (16 bands) frequency band analysis frequency ba n d synthesis wideband 128 bands voltage regulator volume control pre bi q ua d filters adaptive directional microphone or frontwave * ** data logging acoustic indicators and shaper noise generator post biquad filters 1 & 2 gain environmental classification control (ms/digvc) post biquad filters 3 & 4 zero biased receiv er 2 15 16 17 18 1 10 9 12 14 8 7 5 6 4 3 11 13 23 22 21 20 19 noise reduction wdrc (16 channels) impulse noise reduction (inr) R3920
rhythm R3920 www. onsemi.com 9 ordering information device package shipping ? R3920?cfab?e1t 25 pad hybrid case 127dn 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 specifications brochure, brd8011/d. tools ordering information to order a hybrid jig evaluation board for rhythm R3920 contact your sales account manager or fae and use part number sa3400gevb. to order the dsp3 programming box use part number su6701?e1.
rhythm R3920 www. onsemi.com 10 pad locations table 4. pad position and dimensions pad no. pad position pad dimensions x y xdim (mil) ydim (mil) 1 0 0 20 33 2 ?27 0 20 33 3 ?54 ?5 20 23 4 ?81 ?5 20 23 5 ?108 ?5 20 23 6 ?135 ?5 20 23 7 ?162 ?5 20 23 8 ?189 0 20 33 9 ?189 42 20 23 10 ?189 85 20 23 11 ?162 85 20 23 12 ?135 85 20 23 13 ?108 85 20 23 14 ?81 85 20 23 15 ?54 85 20 23 16 ?27 85 20 23 17 0 85 20 23 18 0 42 20 23 19 ?27 42 20 23 20 ?54 42 20 23 21 ?81 42 20 23 22 ?108 42 20 23 23 ?135 42 20 23 24 ?162 26.5 18 12 25 ?162 53.5 18 12
rhythm R3920 www. onsemi.com 11 table 4. pad position and dimensions pad no. x y xdim (mm) ydim (mm) 1 0 0 0.508 0.838 2 ?0.686 0 0.508 0.838 3 ?1.372 ?0.127 0.508 0.584 4 ?2.057 ?0.127 0.508 0.584 5 ?2.743 ?0.127 0.508 0.584 6 ?3.429 ?0.127 0.508 0.584 7 ?4.115 ?0.127 0.508 0.584 8 ?4.801 0 0.508 0.838 9 ?4.801 1.067 0.508 0.584 10 ?4.801 2.159 0.508 0.584 11 ?4.115 2.159 0.508 0.584 12 ?3.429 2.159 0.508 0.584 13 ?2.743 2.159 0.508 0.584 14 ?2.057 2.159 0.508 0.584 15 ?1.372 2.159 0.508 0.584 16 ?0.686 2.159 0.508 0.584 17 0 2.159 0.508 0.584 18 0 1.067 0.508 0.584 19 ?0.686 1.067 0.508 0.584 20 ?1.372 1.067 0.508 0.584 21 ?2.057 1.067 0.508 0.584 22 ?2.743 1.067 0.508 0.584 23 ?3.429 1.067 0.508 0.584 24 ?4.115 0.673 0.457 0.305 25 ?4.115 1.359 0.457 0.305
rhythm R3920 www. onsemi.com 12 package dimensions case 127dn 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 pads. dim a min max ??? millimeters a1 a2 ??? 1.65 e1 0.051 bsc 1.83 e d a b pin a1 indicator a1 c 0.08 0.18 top view side view a e 5.59 bsc e 0.686 bsc e2 e3 0.13 c 0.13 c 2x 2x 0.05 c 0.13 c note 3 1.092 bsc 1.067 bsc l 0.554 0.614 l2 0.808 0.868 a2 b 0.478 0.538 b1 0.427 0.487 d 3.18 bsc l3 0.275 0.335 23x b 4 b c bottom view 123 a e a 0.05 c note 4 b 0.03 c 567 8 e/2 e e/2 e1 e2 e3 2x b1 detail a l3 l2 e 2x l 20x 3x *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* recommended a1 dimensions: millimeters 0.614 0.686 pitch 1.067 detail b 20x 0.487 2x 1.092 0.051 0.538 23x detail b 0.686 0.335 2x 0.686 0.868 3x
rhythm R3920 www. onsemi.com 13 p ublication 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 R3920/d iscenedetect, ilog, rhythm, hrx and evoke are trademarks of semiconductor components industries, llc. thinstax, frontwave, and arkonline are registered trademarks of semiconductor components industries, llc. literature fulfillment : literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 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 loc al sales representative on semiconductor and are trademarks of semiconductor components industries, llc dba on semiconductor or its subsidiaries i n the united states and/or other countries. on semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property . a listing of on semiconductor?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent?marking.pdf . on semiconductor reserves the right to make changes without further notice to any products herein. on semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does o n semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. buyer is responsible for its products and applications using on semiconductor products, including compliance with all laws, reg ulations and safety requirements or standards, regardless of any support or applications information provided by on semiconductor. ?typical? parameters which may be provided in on semiconductor data sheets and/or specifications can and do vary in dif ferent applications and actual performance may vary over time. all operating parameters, including ?typic als? must be validated for each customer application by customer?s technical experts. on semiconductor does not convey any license under its patent rights nor the right s of others. on semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any fda class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. should buyer purchase or use on semicondu ctor products for any such unintended or unauthorized application, buyer shall indemnify and hold on semiconductor and its officers, employees, subsidiaries, affiliates, and distrib utors 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 on semiconductor was negligent regarding the design or manufacture of the part. on semiconductor is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. ?

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