AK4665A Datasheet, PDF (1/52 Pages) Asahi Kasei Microsystems – 20-Bit Stereo CODEC with MIC/HP-AMP

ASAHI KASEI
[AK4665A]
-
AK4665A
20-Bit Stereo CODEC with MIC/HP-AMP
GENERAL DESCRIPTION
The AK4665A is a 20bit CODEC with built-in Input PGA and Headphone Amplifier. The AK4665A
includes a microphone/line input selector and an ALC circuit for input, and a stereo line output buffer,
analog volume controls and capless stereo headphone amplifier for output. The AK4665A also features
an analog mixing circuit that allows easy interfacing in mobile phone and portable communication
designs. The integrated headphone amplifier features “pop-free” power-on/off, a mute control and
delivers 31mW of power into 16Ω load. The AK4665A is housed in a 32pin QFN package, making it
suitable for portable applications.
FEATURE
† 2ch 20bit ADC
- Mono MIC-Amp: +30dB/+6dB/0dB/−6dB
- Single-ended Input
- Input Selector
- Digital ALC: +41.25dB ∼ −54dB, 0.375dB Step, Mute
- Digital HPF for DC-offset cancellation
- I/F format: 20bit MSB justified, I²S
- S/N: 93dB
† 2ch 20bit DAC
- Digital ATT: 0dB ∼ −127dB, Mute, 0.5dB step (soft transition)
- Soft Mute
- Digital De-emphasis Filter: 32kHz, 44.1kHz and 48kHz
- Bass Boost
- I/F Format: I²S, 20bit MSB justified, 20bit/16bit LSB justified
† Sampling Rate: 8kHz ∼ 48kHz
† System clock: 256fs/512fs
† Analog Mixing Circuit
† Stereo Lineout
- ALC: +19.5dB ∼ −12dB, 0.5dB step
- Analog Volume: 0dB ∼ −30dB, Mute, 2dB step
† Capless Stereo Headphone Amplifier
- Output Power: 31mW x 2ch @16Ω
- Line output mode: 1Vrms @10kΩ
- Charge pump circuit for negative power supply
- S/N: 88dB
† µP Interface: 3-wire
† Power Management
† Power Supply:
- AVDD, DVDD, HVDD: 2.6V ∼ 3.6V
- TVDD (Digital I/O): 1.6V ∼ 3.6V
† Power Supply Current: 20mA
† Ta: −30 ∼ 85°C
† Small Package: 32pin QFN (5mm x 5mm, 0.5mm pitch)
MS0440-E-01
-1-
2006/05