مدار مجتمع (آی سی) آی‌سی تعبیه‌شده (پردازنده) پردازندهٔ سیگنال دیجیتال (دی‌اس‌پی)

Product Attributes

Introduction

The AK7739 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, 4 stereo & 4 monaural sample rate converters (SRCs) supporting the sampling frequency up to 192kHz, a DIT, two DSPs and a Sub DSP for Audio/HF process. The DSP1 and the DSP2 have 6144steps/fs (when fs = 48kHz) parallel processing power. The AK7739 is capable of processing sound and voice such as for hands-free function simultaneously because two DSPs are able to work on different but synchronized sampling frequencies. As the AK7739 is a RAM based DSP, it is freely programmable for user requirements, such as acoustic effects and proprietary high performance hands-free function. The AK7739 is available in a space saving 64-pin HTQFP package.

Features

• Dual DSP (DSP1, DSP2): (Delay RAM areas are shared by DSP1 and DSP2)
  • Word Length: 37-bit (Data RAM: Simple floating point)
  • Operational Clock 294.912MHz (6144steps, fs = 48kHz)
  • Multiplier: 32 × 32 → 64-bit (Double precision arithmetic available)
  • Divider: 32 / 32 → 32-bit (Floating point normalization function)
  • ALU: 96-bit arithmetic operation (with overflow margin 32-bit)
  • Program RAM (PRAM): 10kword × 36-bit (DSP1), 8kword × 36-bit (DSP2)
  • Coefficient RAM (CRAM): 6kword × 32-bit (DSP1), 6kword × 32-bit (DSP2)
  • Data RAM (DRAM): 6kword × 37-bit (DSP1), 6kword × 37-bit (DSP2)
  • Delay RAM (DLRAM): 36kword × 37-bit (DSP1+DSP2 Total)
  • JX pins (Interrupt)
  • Independent Power Management Function for DSP1 and DSP2
• Sub DSP (DSP3):
  • Word Length: 37-bit (Data RAM: Simple floating point supported)
  • Operational Clock 294.912MHz (6144steps, fs = 48kHz)
  • Multiple: 32 × 32 → 64-bit (Double precision arithmetic available)
  • Divider: 32 / 32 → 32-bit (Floating point normalization function)
  • ALU: 96-bit Arithmetic Operation (with overflow margin 32-bit)
  • Program RAM (PRAM): 2kword × 36-bit
  • Coefficient RAM (CRAM): 4kword × 32-bit
  • Data RAM (DRAM): 6kword × 37-bit
• ADC1: 24-bit Stereo ADC with MIC Gain Amplifier
  • Sampling Frequency: fs = 8kHz to 48kHz
  • Channel Independent Analog Gain Amplifiers (-3 to 30dB (3dB step))
  • Differential Input, Single-ended Input or Pseudo-differential Input
  • ADC Characteristics S/N: 95dB (fs = 48kHz, Differential Input, MIC Gain = 0dB)
  • Channel Independent Digital Volume (+24 to -103dB, 0.5dB Step, Mute)
  • Digital HPF for DC Offset Cancelling
  • Low Noise MIC Power Output: 2ch
  • 5 types of Digital Filter for Sound Color Selection
• ADC2: 24-bit Stereo ADC with Input Selector
  • Sampling Frequency: fs = 8kHz to 192kHz
  • Analog Input Selector: Differential Input, Single-ended Input or Pseudo-differential Input
  • ADC Characteristics S/N: 102dB (fs = 48kHz, Differential Input)
  • Channel Independent Digital Volume (+24 to -103dB, 0.5dB Step, Mute)
  • Digital HPF for DC Offset Cancelling
  • 5 types of Digital Filter for Sound Color Selection
• DAC: Advanced 32-bit DAC
  • 2ch x2
  • Sampling Frequency: fs = 8kHz to 192kHz
  • Single-ended Output
  • DAC Characteristics S/N: 108dB (fs = 48kHz)
  • Channel Independent Digital Volume (+12 to -115dB, 0.5dB Step, Mute)
  • 4 types of Digital Filter for Sound Color Selection
• SRC
  • SRC - 2ch x 4 (Stereo) - 1ch x 4 (Monaural) or 2ch x 2 (Stereo)
  • FSI = 8kHz ~ 192kHz, FSO = 8kHz ~ 192kHz (FSO/FSI = 0.167 ~ 6.0)
• DIT
  • DIT - S/PDIF, IEC60958, AES/EBU, EIAJ CP1201 Compatible
• Digital Interfaces
  • Digital Input Port 6 (Max. 96ch @Fs:48kHz TDM / 48ch @Fs:96kHz TDM)
  • Digital Output Port 6 (Max. 96ch @Fs:48kHz TDM / 48ch @Fs:96kHz TDM)
  • Independent LRCK/BICK Input/output Port x 5
  • Data Format: MSB 32, 24-bit/LSB 24, 20, 16-bit/ I2S
  • Short / Long Frame Supported
  • TDM Input / Output Mode (Supported by all ports/ 512 mode x2)
  • Digital MIC Input Port (2ch x 1)
  • SPI Interface Master Controller
• Digital Mixer Circuit (x2)
• PLL Circuit
• μP Interface: SPI (7MHz Max.) / I2C (400KHz Fast Mode)
• Power Supply:
  • Digital: VDD12: 1.14V ~ 1.3V (Typ. 1.2V)
  • I/F: TVDD1: 1.7V ~ 3.6V (Typ. 3.3V)
  • TVDD2: 1.7V ~ 3.6V (Typ. 3.3V)
  • TVDD3: 1.7V ~ 3.6V (Typ. 3.3V)
  • AVDD: 3.13V ~ 3.6V (Typ. 3.3V)
  • PLLVDD: 3.13V ~ 3.6V (Typ. 3.3V)
  • Operating Temperature: Ta = -40 ~ 85°C
  • Package: 64-pin HTQFP (10mm x 10mm, 0.5mm pitch)