AK7758VN

DSP with Stereo CODEC + Mic/Lineout Amp

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Description

The AK7758 is a highly integrated digital signal processor, a stereo audio CODEC, a MIC pre-amplifier, a
line-out amplifier, digital audio I/F. The main and sub DSPs have 3072step at fs = 48kHz parallel
processing power. As the AK7758 is a RAM based DSP, it is programmable for user requirements such
as high performance hands free function and acoustic effects. The AK7758 is available in a space saving
small 36-pin QFN package.

Key Features

□ DSP
- Word Length: 28-bit (Data RAM: Simple floating point)
- Instruction Cycle: Maximum 6.8ns (3072fs at fs=48kHz)
- Multiplier: 24 x 24 → 48-bit (double precision available)
- Divider: 24 / 24 → 24-bit (with floating point normalization function)
- ALU: 52-bit arithmetic operation (with overflow margin 4-bit)
- Program RAM (PRAM): 6144 x 36-bit
- Coefficient RAM (CRAM): 4096 x 24-bit
- Data RAM (DRAM): 4096 x 28-bit (24-bit floating point)
- Offset Register (OFREG):  32 x 14-bit
- Delay RAM (DLRAM): 16384 x 28-bit
- JX pins (Interrupt)
□ Sub DSP
- Word Length: 28-bit (Data RAM: Simple floating point)
- Instruction Cycle:  Maximum 6.8ns (3072fs at fs=48kHz)
- Multiplier: 24 x 24 → 48-bit (double precision available)
- Divider: 24 / 24 → 24-bit (with floating point normalization function)
- ALU: 52bit arithmetic operation (with overflow margin 4bit)
- Program RAM (PRAM): 1024 x 36-bit
- Coefficient RAM (CRAM): 3072 x 24-bit
- Data RAM (DRAM): 3072 x 28-bit
- Delay RAM (DLRAM): 3072 x 28-bit
□ Two Digital Interfaces (I/F 1, I/F 2)
- Digital Signal Input Port (6ch) MSB justified 24-bit/ LSB justified 24, 20, 16-bit and I2S
- Digital Signal Output Port (8ch) MSB justified 24-bit/ LSB justified 24, 20, 16-bit and I2S
- Short / Long Frame
- TDM 128fs (4ch), 192fs (6ch), 256fs (8ch) Formats
   
 
□ Stereo 24-bit ADC:
- Sampling Frequency: fs = 8kHz ~ 48kHz
- ADC Characteristics: S/(N+D): 91dB;  DR, S/N: 102dB
- Stereo Analog Input Selector (Differential, Single-ended Input)
- Stereo Analog Input Range Adjustment Amplifier (Single-ended Input)
- Channel Independent Analog Gain Amplifier for Microphone (0 ~ 18dB(2dB Step),18dB~36dB(3dB Step))
- Analog DRC (Adjustable Dynamic Range)
- Channel Independent Digital Volume (24dB ~ -103dB, 0.5dB Step, Mute)
- Digital HPF for DC Offset Cancelling
□ Line Input
- Single-ended
- Line Amplifier (21dB ~ -21dB, 3dB Step, Mute)
□ Stereo 24-bit DAC
- Sampling Frequency: fs = 8kHz ~ 48kHz
- Digital Volume (12dB ~ -115dB, 0.5dB Step, Mute)
□ Line Output
- Single-ended
- S/(N+D): 89dB; DR, S/N: 106dB
- Stereo Analog Volume (+0 ~ -28dB, 2.0dB Step, Mute)   
□ Analog Mixer
□ Digital Mixer
□ 2ch Digital Microphone Interface
□ 3 types Analog Direct Path
□ PLL Circuit
□ I2C bootloader
-EEPROM Mat Selectable
□ μP Interface: SPI, I2CBUS(400kHz Fast-Mode)
□ Power Supply:
Analog     AVDD: 3.0V ~ 3.6V (typ. 3.3V)
Digital 1    LVDD: 3.0V ~ 3.6V (typ. 3.3V)
Digital 2    DVDD: 1.14V ~ 1.3V (typ. 1.2V)
(External Power Supply or Internal Regulator is selectable)
I/F                   TVDD1/2: 1.7V ~ 3.6V (typ. 3.3V)
   
□ Operating Temperature Range: -40 ~ 85℃
□ Package: 36-pin QFN (0.5mm pitch)

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Block Diagram

Block Diagram

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