Juchip SemiconductorDigital Hearing Aid · JSZ2698
One Chip Runs the Whole Hearing-Aid Chain; Battery Life Measured in Months
8-Ch WDRC · Adaptive NR · Class-D Direct Drive
Pickup, a 13-step programmable PGA, adaptive noise reduction and feedback cancellation, 8-channel WDRC and a zero-bias class-D driver all run in real time inside the single JSZ2698. The complete aid needs only a 1.0–1.5 V zinc-air cell, a receiver and buttons: about 0.9 mA total, and roughly 1.5–2 months from a size-675 cell at 12 h a day.
- WDRC bands
- 8
- Total supply
- ~0.9 mA
- 675 cell @ 12 h/day
- 1.5-2 mo
- Receiver drive
- 30 mA / 20 Ω
System Architecture
In-ear chain: from ambient sound to receiver drivePickup → PGA → DSP → Direct Drive
The on-chip sensing element feeds a 13-step PGA (-6 ~ +30 dB); the 24-bit path delivers up to 92 dB input dynamic range.
JSZ2698Adaptive noise reduction lifts the speech floor while feedback cancellation secures gain before whistle.
AdaptiveAudiogram-based multiband compression - soft sounds lifted, loud sounds capped; up to 3 remembered programs cycled by one key.
8-ch WDRCZero-bias class-D drives balanced-armature or dynamic receivers directly: 30 mA / 20 Ω / 95 dB DR - no external amp or coupling caps.
Class-DBill of Solution
What You Get: Hardware, Algorithms & SupportWhat You Get
Deliverables
Six engineering deliverables, more than chips soldEngineered Handover
Power tree, keys, receiver interface and EMC layout guidance built around JSZ2698.
WDRC / NR / feedback parameters organized for mild, moderate and severe loss, written and demonstrated over I2C.
Feedback-cancellation tuning guide and leakage tables for open domes vs sealed tubes.
BA/dynamic receiver selection and sound-path simulation; response targets follow common prescription rules.
Endurance model across gain/output settings on a 1.0-1.5 V zinc-air cell, including key-tone budget.
Acoustic end-of-line fixture flow, quick-test items and firmware version traceability.
Why Single-Chip
Simple amplification, discrete DSP or single-chip: how to chooseTrade-offs, Honestly
| Dimension | Analog Amplified PSAP | Discrete DSP + Amp | JSZ2698 Single-Chip (This) |
|---|---|---|---|
| Sound processing | Wideband linear gain; whistles when pushed | Compression depends on algorithm choice | 8-ch WDRC + adaptive NR / feedback cancellation |
| Power budget | Extremely low, but no compensation | Several mA, multiple supply rails | ~0.9 mA total from a single zinc-air cell |
| Signal-chain parts | Mic + amp + passives | DSP + amp + bias + coupling caps | Sensor, front end, DSP and driver in one package |
| Fitting flexibility | Not adjustable | Depends on a host-system build | 3 remembered programs; curves written over I2C |
| Receiver interface | Single-ended, output caps needed | External amplifier required | 30 mA / 20 ohm zero-bias differential direct drive |
| Best fit | Entry-level amplified earbuds | Deeply customized premium aids | Fast OTC / BTE / RIC system bring-up |
JSZ2698 is in its Preliminary batch, now shipping; figures follow the latest datasheet. Clinical and regulatory obligations for hearing aids and PSAPs remain with the device manufacturer per target market.
Target Products
Proven in these product formsWhere It Ships
Implementation
Four steps from fitting profile to pilot lineFrom Kick-off to Mass Production
Target form (BTE/RIC/OTC), gain needs and noise scenes; link budget and receiver selection proposal.
Schematic, key/receiver interface, tubing and cavity structure reviewed jointly.
WDRC/NR/feedback written per audiogram template; three programs tuned with real-scene listen-back.
Acoustic EOL fixture, quick-test limits and provisioning traceability rolled into pilot.
Give lost hearing back to everyday conversation
Share the target model and loss profile; the acoustics team returns a chain assessment and parameter guidance within 10 business days.
Book a Review