austriamicrosystems is a global leader in the design and manufacture of high performance analog ICs (integrated circuits) developing and producing industry leading analog semiconductors, including high performance standard products and customized solutions. austriamicrosystems focuses on the areas of power management, sensors & sensor interfaces and mobile infotainment in its markets Communications, Industry & Medical and Automotive, complemented by its Full Service Foundry activities.
The AS3500/01/02 are speaker driver with Ambient Noise Cancelling function for handsets, headphones or ear pieces. It is intended to improve quality of e.g. music listening, a phone conversation etc. by reducing background ambient noise.The AS3501/AS3502 combine a high quality (0.1% THD, >100dB SNR), true ground, audio headphone amplifier with all the necessary circuitry to enable superior performance Active Noise Cancellation, all at very low power consumption. The AS3501 is ideally suited for feed-forward topology, whereas AS3502 is better suited for feedback topology.
Features
- ANC processing
- Feed-forward and feedback topology
- Calibration and configuration programmable on prod line without manual intervention
- Typically up to 20dB noise reduction depending on headset
- High Performance true ground Headphone Amplifier
- 2x34mW, THD <0.1% @ 16 Ohm with 1.5V supply, SNR >100Db
- click and pop less start-up/shutdown
- Line-In gain programmable or User adjustable
- 2-wire serial control
- Low quiescent current of 0.6uA (typ.)
- Single Cell (AA/AAA) or 1.0 - 1.8V supply
- Short circuit protection
- High PSRR, 80dB at 1KHz and 217Hz
- Package:
- AS3501 : 4x4mm QFN24 0.5mm pitch
- AS3502 : 5x5mm QFN32 0.4mm pitch
Applications: Headsets (Over-ear, On-ear and In-ear), Hands-Free Kits, Mobile Phones, Portable Media Players, Portable DVD players