AK7735EQ

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Description

The AK7735 is a highly integrated digital signal processor, including a 24-bit stereo ADC with MIC gain amplifiers, a 24-bit stereo ADC with input selector, two 32-bit stereo DACs, 2 stereo sampling rate convertors supporting the sampling frequency up to 192kHz and dual DSPs for Audio/HF process. Each DSP has 3072step/fs (when fs=48kHz) parallel processing power. As the AK7735 is a RAM based DSP, it is freely programmable for user requirements, such as acoustic effects and proprietary high performance hands-free function. The AK7735 is available in a 48-pin LQFP package.

Key Features

□ Dual DSP: (DSP1 and DSP2 have the same specification. Memory areas are shared by them)
-    Word length:         28-bit (Simple floating point supported)
-    Instruction cycle:     Max. 6.8ns (3072fs at fs=48kHz)
-    Multiplier:         24 x 24 → 48-bit (Double precision arithmetic available)
-    Divider:         24 / 24 → 24-bit (Floating point normalization function)
-    ALU:             52-bit Arithmetic Operation (with 4bits overflow margin)
-    Program RAM:         4096-word x 36-bit
-    Coefficient RAM:    6144-word x 24-bit
-    Data RAM:         4096-word x 28-bit
-    Delay RAM:         12288-word x 28-bit
-    JX pins (Interrupt)
- Independent Power Management Function for DSP1, DSP2
□ ADC1: 24-bit Stereo ADC with MIC Gain Amplifiers
-    Sampling Frequency: fs = 8kHz ~ 192kHz
-    Channel Independent Analog Gain Amplifiers (0~18dB(2dB Step), 18~36dB(3dB Step))
-    Differential Input or Single-ended Input
-    ADC Characteristics      S/N: 106dB (fs=48kHz, Differential Input, MIC Gain=0dB)
-    Channel Independent Digital Volume Control (24dB~-103dB, 0.5dB Step, Mute)
- Digital HPF for DC Offset Cancelling
-    Low Noise MIC Power Output: 1ch
- 4 types of Digital Filter for Sound Color Selection
□ ADC2: 24-bit Stereo ADC with Input Selector
-    Sampling Frequency: fs = 8kHz ~ 192kHz
-    Analog Input Selector: Differential Input x1 or Single-ended Input x2,
-    ADC Characteristics      S/N: 106dB (fs=48kHz, Differential Input)
-    Channel Independent Digital Volume (24dB ~ -103dB, 0.5dB Step, Mute)
-    Digital HPF for DC Offset Cancelling
- 4 types of Digital Filter for Sound Color Selection
 
□ DAC: Advanced 32bit DAC
-    2ch x 2
-    Sampling Frequency: fs = 8kHz ~ 192kHz
-    Single-ended Output
- DAC Characteristics    S/N: 108dB (fs=48kHz)
-    Channel Independent Digital Volume Control (12dB ~ -115dB, 0.5dB Step, Mute)
- 4 types of Digital Filter for Sound Color Selection
□ SRC:
-    2ch x 2
-    FSI = 8kHz ~ 192kHz, FSO = 8kHz ~ 192kHz (FSO/FSI = 0.167 ~ 6.0)
□ Digital Interfaces
-    Digital Input Port x 4 (Max 32ch, in TDM mode)
-    Digital Output Port x 4 (Max 32ch, in TDM mode)
-    Independent LRCK/BICK port x 3
-    Data Format: MSB 32, 24bit / LSB 24, 20, 16bit / I2S
-    PCM Short / Long Frame Supported
-    TDM Format Supported (Max:8ch / 256fs, fs=96kHz)
□ PLL Circuit
□ μP Interface: SPI(Max 6MHz) / I2C(400kHz Fast Mode, 1MHz Fast Mode Plus)
□ Power Supply:
Analog:    AVDD:     3.0V ~ 3.6V (Typ. 3.3V)
Digital:    LVDD:     3.0V ~ 3.6V (Typ. 3.3V) (3.3V → 1.2V regulator integrated)
I/F          VDD33:    3.0V ~ 3.6V (Typ. 3.3V)
TVDD:     1.7V ~ 3.6V (Typ. 3.3V)
□Operating Temperature Range:
AK7735VQ: Ta = -40 ~ 85℃
AK7735EQ: Ta = -20 ~ 85℃
□Package: 48-pin LQFP (7mm x 7mm, 0.5mm pitch)

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