AK4637EN Datasheet, PDF (1/96 Pages) Asahi Kasei Microsystems – 24bit Mono CODEC with MIC/SPK-AMP

[AK4637]
AK4637
24bit Mono CODEC with MIC/SPK-AMP
1. General Description
The AK4637 is a low power 24-bit Mono CODEC with a microphone and speaker amplifiers.
The AK4637 supports sampling frequency from 8kHz to 48kHz. It is suitable for a wide range of
application from speech signal processing for narrowband, wideband and super wideband to sound
signal processing for audio band.
The input circuits include a microphone amplifier and a high performance digital ALC (automatic level
control) circuit. In addition, the output circuits include a speaker amplifier with 1W output power. It is
suitable for various products as well as portable applications with recording/playback function.
The AK4637 are available in a small 20-pin QFN (3mm x 3mm, 0.4mm pitch: AK4637EN) package saving
mounting area on the board.
Application:
 IP Camera
 Digital Camera
 MFP(Multi Function Printer)
2. Features
1. Recording Functions
 Analog Input
1 Monaural Single-ended input or Differential input
 Microphone Amplifier: +30dB ~ 0dB, 3dB Step
 Microphone Power Supply: 2.0V or 2.4V, Noise Level= 108dBV
 Digital ALC (Automatic Level Control)
- Setting Range: +36dB  52.5dB, 0.375dB Step & Mute
 ADC Performance: S/(N+D): 83dB, DR, S/N: 88dB (MIC-Amp=+18dB)
S/(N+D): 84dB, DR, S/N: 95dB (MIC-Amp=0dB)
 Wind Noise Reduction Filter
 5-Band Notch Filter: Include Dynamic Gain Control
 Digital Microphone Interface
2. Playback Functions
 Digital ALC (Automatic Level Control)
- Setting Range: +36dB ~ 52.5dB, 0.375dB Step & Mute
 Sidetone Mixer & Volume Control (0dB ~ 18dB, 6dB Step)
 Digital Volume Control
- +12dB ~ 89.5dB, 0.5dB Step & Mute
 Mono Speaker Amplifier (with Line Output Switch)
- Speaker Amplifier Porformance: S/(N+D): 75dB@250mW, S/N: 97 dB
- BTL Output
- Output Power: 400mW@8 (AVDD=3.3V), 1W@8 (AVDD=5V)
 Analog Mixing: BEEP Input
3. Power Management
015010680-E-00
-1-
2015/09