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SB3231 Fiches technique(PDF) 1 Page - ON Semiconductor |
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SB3231 Fiches technique(HTML) 1 Page - ON Semiconductor |
1 / 18 page © Semiconductor Components Industries, LLC, 2014 November, 2014 − Rev. 4 1 Publication Order Number: SB3231/D RHYTHM SB3231 Pre-configured DSP System for Hearing Aids Description ON Semiconductor ’s RHYTHM t SB3231 hybrid is a trimmer−configurable DSP system based on a four−channel compression circuit featuring Adaptive Feedback Cancellation, Adaptive Noise Reduction, and FrontWave static directionality. Based on a phase cancellation method, Rhythm SB3231’s Adaptive Feedback Reduction algorithm provides added stable gain to enable extra gain and user comfort. It features rapid adjustment for dynamic feedback situations and resistance to tonal inputs. Rhythm SB3231’s Adaptive Noise Reduction monitors noise levels independently in 64 individual bands and employs advanced psychoacoustic models to provide user comfort. The FrontWave directional system utilizes a pair of microphones to create a fully customizable static polar pattern, such as bidirectional, cardiod, hyper−cardiod and super−cardiod. In addition to these adaptive algorithms, Rhythm SB3231 also supports the following features: up to four channel WDRC, low−distortion compression limiting, cross fading between audio paths for click−free memory changes, eight−band graphic equalizer, eight configurable generic biquad filters, programming speed enhancements, in−channel squelch to attenuate microphone and circuit noise in quiet environments, optional peak clipping, flexible compression adjustments, volume control, rocker switch, noise generation for Tinnitus treatment, and industry−leading security features to avoid cloning and software piracy. A trimmer interface supports manual circuit configuration. It continuously monitors trimmer positions and translates them into the hearing−aid parameters of choice. A Serial Data or I2C Interface provides full programmability at the factory and in the field. The Rhythm SB3231 hybrid contains a 256 kbit EEPROM intended for programmable and trimmer based devices. Features • FrontWave Static Directional • Adaptive Noise Reduction • Adaptive Feedback Cancellation • WDRC Compression with Choice of 1, 2 or 4 Channels of Compression • Auto Telecoil with Programmable Delay • EVOKE LITEt Acoustic Indicators • Noise Generator for Tinnitus Treatment or In−situ Audiometry • Frequency Response Shaping with Graphic EQ • Trimmer Compatibility – Four Three−Terminal Trimmers with Configurable Assignments of Control Parameters www.onsemi.com 25 PAD HYBRID CASE 127DN PAD CONNECTION MARKING DIAGRAM SB3231−E1 XXXXXX SB3231 = Specific Device Code E1 = RoHS Compliant Hybrid 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 TR4 20 TR3 21 TR2 22 TR1 23 N/C 25 24 VIN2 TIN DAI VC D_VC SDA CLK MS1 VREG MGND GND PGND OUT+ OUT− VBP VB MS2 See detailed ordering and shipping information on page 14 of this data sheet. ORDERING INFORMATION |
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