The WM2002 is a low power, high-quality stereo headphone driver, delivering Cirrus Logic’s patented ambient noise cancelation. The WM2002 supports analog playback or voice input, and analog microphones for noise cancelation. Designed for incorporation within a stand-alone headset or headphone, the Cirrus Logic ANC noise cancelation engine performs ambient noise cancelation during a voice call or during music playback. The WM2002 provides integrated power management, comprising a DC-DC converter, charge pump and LDO regulators. Different power supply configurations can be supported, including operation from a single cell AAA or AA battery, and other configurations using externally regulated supplies. System clocking is achieved using a crystal-controlled on-chip oscillator. An external clock can be connected directly, if available. The WM2002 is configured using programmable settings stored in an integrated non-volatile memory. The configuration stored in the OTP memory is enabled automatically at start-up. If required, the WM2002 can also be configured using register control accessed using a two-wire serial control interface.
Features
Cirrus Logic Active Noise Cancelation (ANC)
>30 dB (peak), 25 dB (typical) ambient noise reduction*
Wide noise cancelation bandwidth (40Hz to 4kHz)*
Up to 3 banks of ANC coefficients can be programmed to support different operating conditions
Audio inputs
Up to 10 analog noise cancelation microphones
2 single-ended or 1 differential line input per channel
Headphone driver (LDO4VOUT = 1.8V)
45mW per channel into 16ω load
22mW per channel into 32ω load
Single-ended or differential (BTL) drive configuration
-82 dB THD+N for differential (BTL) drive
Integration
On-chip DC-DC boost converter, charge-pump and LDOs
Flexible power supply options, including single cell battery (1 x AAA battery)
Internal crystal oscillator
Miscellaneous
Monitor pin to select mute / talk-through modes
LED driver
Tone generator for audible status indication
Pop and click noise protection circuit
RFI suppression
48-pin QFN package (7 x 7 x 0.75mm, 0.5mm pitch)
The WM2002 is a low power, high-quality stereo headphone driver, delivering Cirrus Logic’s patented ambient noise cancelation. The WM2002 supports analog playback or voice input, and analog microphones for noise cancelation. Designed for incorporation within a stand-alone headset or headphone, the Cirrus Logic ANC noise cancelation engine performs ambient noise cancelation during a voice call or during music playback. The WM2002 provides integrated power management, comprising a DC-DC converter, charge pump and LDO regulators. Different power supply configurations can be supported, including operation from a single cell AAA or AA battery, and other configurations using externally regulated supplies. System clocking is achieved using a crystal-controlled on-chip oscillator. An external clock can be connected directly, if available. The WM2002 is configured using programmable settings stored in an integrated non-volatile memory. The configuration stored in the OTP memory is enabled automatically at start-up. If required, the WM2002 can also be configured using register control accessed using a two-wire serial control interface.
Features
- Cirrus Logic Active Noise Cancelation (ANC)
- >30 dB (peak), 25 dB (typical) ambient noise reduction*
- Wide noise cancelation bandwidth (40Hz to 4kHz)*
- Up to 3 banks of ANC coefficients can be programmed to support different operating conditions
- Audio inputs
- Up to 10 analog noise cancelation microphones
- 2 single-ended or 1 differential line input per channel
- Headphone driver (LDO4VOUT = 1.8V)
- 45mW per channel into 16Ω load
- 22mW per channel into 32Ω load
- Single-ended or differential (BTL) drive configuration
- -82 dB THD+N for differential (BTL) drive
- Integration
- On-chip DC-DC boost converter, charge-pump and LDOs
- Flexible power supply options, including single cell battery (1 x AAA battery)
- Internal crystal oscillator
- Miscellaneous
- Monitor pin to select mute / talk-through modes
- LED driver
- Tone generator for audible status indication
- Pop and click noise protection circuit
- RFI suppression
- 48-pin QFN package (7 x 7 x 0.75mm, 0.5mm pitch)
