AKM

AK4637 Low-Power Audio 24-bit Mono CODEC

AKM's AK4637 Mono CODEC with 1 W output and microphone/speaker amplifiers, SPK-Amp is ideal for IoT applications

Image of AKM's Low Power Audio 24-bit Mono CODEC with Microphone/Speaker AmplifiersSince the market demand for single chip recording/playback CODEC for potable and Internet of Things (IoT) equipment is increasing, AKM has developed the AK4637EN. It is ideal for IoT or portable devices requiring a low-power audio 24-bit monaural CODEC with  microphone and speaker amplifiers with built-in regulators. The AK4637EN improves its resolution to 24-bit from 16-bit and the speaker output power from its predecessor, the AK4633EN. Package size is also minimized and can be used as a monaural version of the AK4951EN.

  • 1 W output SPK-Amp: the integrated monaural speaker amplifier is capable of 1 W output power to directly drive an integrated speaker for playback requiring no external components
  • Advanced recording function: this device integrates a low noise/low power microphone amplifier and microphone power supply to enable high quality, realistic recoding performance. This is achieved by “wind noise reduction filter”, “5-band notch filter” that allow for the removal of specific system tones/noises and a “digital automatic level control (ALC) circuit” to optimize recording levels
  • Low power consumption: the AK4637EN achieves very low power consumption: 6.5 mW in monaural recording mode and 11.6 mW in speaker playback mode, improving battery life of mobile devices
    Image of AKM's Low Power Audio 24-bit Mono CODEC with Microphone/Speaker Amplifiers
Audio 2 Go™ products are designed for portable audio applications, including smartphones, tablet computers, and media players which provide feature-rich single chip solution with low power consumption and high audio fidelity.
Features
  • Sampling frequency: 8 kHz to 48 kHz
  • Mono 24-bit ADC
    • S/(N+D): 83 dB, S/N: 88 dB (MIC gain=18 dB)
    • S/(N+D): 84 dB, S/N: 95 dB (MIC gain=0 dB)
  • Microphone amplifier: +30 dB to 0 dB, 3 dB step
  • Wind noise reduction filter
  • 5-band notch filter (available as equalizer, switching gain during operation is available)
  • High-performance digital automatic level control (ALC)
  • Digital microphone interface
  • Package
    • 20-pin QFN (3 mm × 3 mm; 0.4 mm pitch)
  • Operating temperature: -40°C to 85°C
  • Side tone mixer and volume control
  • Digital volume control for output
  • Mono 24-bit DAC
  • 1 W output mono speaker amplifier (with line output switch)
  • Analog mixing: BEEP input
  • Regulator achieving high PSRR
  • PLL built-in loop filter corresponding various clock frequency
  • µP I/F: I2C-bus
  • Power supply
    • Analog power supply (AVDD): 2.8 V to 5.5 V
    • Digital power supply (DVDD): 1.6 V to 1.98 V
    • Digital I/O power supply (TVDD): 1.6 V or (DVDD-0.2) to 3.6 V
Applications
  • IP cameras
  • Digital still cameras
  • Multi-function printers (MFP)
  • IoT equipment, such as wearable and home automation, etc.
Published: 2015-12-01

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