مدار مجتمع (آی سی) آی‌سی واسط ارتباطی کدک‌

Product Attributes

Introduction

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 sampling frequency S = 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.

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 = 48 kHz)
  • Multiplier: 24x24 → 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
  • Sampling Frequency: fs = 8kHz ~ 192kHz
  • Analog Input Selector: Differential Input x1 or Single-ended Input x2
  • ADC Characteristics S/N: 106dB (f ≤ 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
• 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 / I²C
  • 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)