Pre-fit DSP Solution for Hearing Aids RHYTHM R3110 Introduction The RHYTHM R3110 hybrid from ONSemiconductor is a prefit DSP system that is based on a twochannel compression www.onsemi.com 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, costeffective solution with many features found in highend hearing aids, including Adaptive Noise Reduction and Adaptive Feedback Cancellation. R3110 is targeted at 21PAD HYBRID replacing aging analog solutions it offers the same ease of use, yet CASE 127DF provides the superior performance of digital technology. In its simplest configuration, a hearing aid build using R3110 only requires PIN NUMBERING four external electronic components. Key Features and Benefits 15 16 1 PreFit Audiology Parameters All soundprocessing algorithms 14 17 2 are preprogrammed to enable manufacturers to develop hearing aids 13 18 3 in a variety of formfactors and to fit a wide range of hearing loss 12 19 4 profiles. The device can also be configured for additional usecases through hardware settings. 11 20 5 TrimmerBased Fitting Up to four trimmers can be deployed, 10 6 21 offering manufacturers the capability to modify most parameters that 9 8 7 are important for patient fitting. Mode Control Provides a variety of user control options: (Bottom View) momentary or static switches, as well as an analog volume control. Adaptive Feedback Canceller Automatically reduces acoustic MARKING DIAGRAM feedback. It allows for an increase in stable gain while minimizing artifacts for music and tonal input signals R3110CBAA Automatic Telecoil Support Supports the use of telecoil devices, enabled either automatically with a magnetic sensitive switch or via an external switch R3110CBAA = Specific Device Code Adaptive Noise Reduction The adaptive noise reduction algorithm = Work Order Number monitors signal and noise activities in 32 individual bands and carefully reduces noise ORDERING INFORMATION Tinnitus Masking A noise source can be enabled to mask tinnitus. See detailed ordering and shipping information on page 13 of The noise level is adjustable and mixed with the audio path. Spectral this data sheet. shaping is also possible using the highcut and lowcut filters. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: March, 2021 Rev. 2 R3110/DRHYTHM R3110 KEY SPECIFICATIONS TrimmerBased Fitting: Basic Acoustic Indicators LowCut Filter Corner Frequency High Quality 20bit Audio Processing HighCut Filter Corner Frequency High Power/High Gain Capability Wideband Gain 16 kHz sampling rate (8 kHz bandwidth) Tinnitus Noise Level High Fidelity Audio CODEC Output Limiting (AGCO) 96 dB Input Dynamic Range Three Input Modes Drives ZeroBias TwoTerminal Receivers Simple Mode Advanced Mode E1 RoHScompliant Hybrid Telecoil Mode Hybrid Typical Dimensions: Push Button Support 200 x 122 x 39.4 mil (5.08 x 3.1 x 1.0 mm) Analog Volume Control R3110 is PbFree and RoHS Compliant BLOCK DIAGRAM VC AGCO LC HC VB TCEN MS 12 14 10 18 19 8 9 R31R311010 Mode 15 VREG Control Feedback Cancellation 7 VBP 1 MIC Two Channel 5 + + OUT+ + WDRC Gain Filtering HBridge A/D & Controls 6 OUT Noise + ++ Reduction A/D TCIN 16 4 PGND Tinnitus Noise Generation Acoustic 2 MGND Indicators 13 21 3 WG/NL TNEN GND Figure 1. R3110 Block Diagram SPECIFICATIONS Table 1. ABSOLUTE MAXIMUM RATINGS Parameter Value Unit Operating Temperature Range 0 to 40 C Storage Temperature Range 20 to + 70 C Absolute Maximum Power Dissipation 25 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 functionality 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 staticfree workstation. WARNING: Moisture Sensitive Device RoHS Compliant Level 3 MSL. Do not open packages except under controlled conditions. www.onsemi.com 2