[AK4141]
= Preliminary =
AK4141
NICAM/A2/EIA-J Digital Stereo Decoder
GENERAL DESCRIPTION
The AK4141 is a NICAM/A2/EIA-J stereo decoder, which is optimized for Digital TV application. The
AK4141 achieves no alignment, few external components and high audio performance by digital stereo
decoding architecture. The AK4141 integrates a stereo sample rate converter (SRC) for asynchronous
digital audio sources such as HDMI, digital tuner, digital switches and sound processing functions such as
5-band equalizers. The AK4141 supports major audio data formats (MSB/LSB justified, I
2
S and TDM) to
interface with DSP, ADC, DAC. Therefore, the AK4141 is suitable for the AV systems such as Digital TV
and DVR.
FEATURES
1. Stereo Decoding
Capable of receiving Sound Intermediate Frequency (SIF) with Selector
and FM Demodulation
Automatic Gain Control (AGC: 100mVpp ~ 1Vpp) for SIF input
Alignment Free Digital Stereo Decoding
EIA-J
NICAM: B/G, L, I, D/K with FM/AM Mono
A2: B/G, D/K1, D/K2, D/K3, M/N
Automatic/Manual Stereo Decoding Standard Selection
Automatic/Manual Audio Mode (Stereo/MONO/two sounds) Selection
Signal Quality Detection for Auto Selection Mode
High FM Deviation Option (max: 540kHz)
I2S sampling rate (fs): 32k/44.1k/48kHz
2. Audio Processing (Two Stereos)
Automatic Level Control (ALC)
Balance
5-band Equalizer
Stereo Separation Emphasis
Digital Volume Control with Soft Mute
(+12dB~-115dB, 0.5dB/step)
Audio Data Interface:
I2S input x 5 (2 inputs: SRC available)
I2S output x 3
Master/Slave Mode
Audio Format: 24bit Left justified /Right justified / I
2
S or TDM
3. Asynchronous Sample Rate Converter (SRC)
Input Sample Rate: 8k~192kHz
fso/fsi: 1/6~6
4. Digital Audio Interface Transmitter (DIT) with Through Mode
5. Integrated X’tal Oscillator
6. Master Clock: 256fs/384fs/512fs/768fs/1024fs
7. I2C-bus Control Interface
8. Power Supply: 1.8V±0.1V, 3.3V±0.3V
9. Ta: -20 ~ 85°C
10. Package: 48pin LQFP
Rev. 0.3-PB
-1-
2008/01
AKM [ ASAHI KASEI MICROSYSTEMS ]
