مدار مجتمع (آی سی) آی‌سی صوتی ویژه

Product Attributes

Introduction

The AK7604 is a highly integrated digital signal processor comprising a 24-bit stereo ADC with input selector, three 24-bit stereo DACs, four stereo sample rate converters supporting up to 192kHz sampling frequency, and an audio DSP. The audio DSP offers parallel processing capability of 2560 steps/sampling frequency (at 48kHz) and is freely programmable to meet user requirements. The AK7604 is available in a 48-pin LQFP package.

Features

• Audio DSP:
  • Word length: 28-bit (simple floating-point arithmetic supported)
  • Instruction cycle: 8.1ns max (2560fs at fs = 48kHz)
  • Multiplier: 24×24→48-bit (double-precision arithmetic supported)
  • Divider: 24/24→24-bit (floating-point normalization)
  • ALU: 64-bit arithmetic (16-bit overflow headroom)
  • Program RAM: 1024 words × 36-bit
  • Coefficient RAM: 1024 words × 24-bit
  • Data RAM: 6144 words × 28-bit
• ADC: 24-bit stereo ADC with input selector
  • Sampling frequency: fs = 8kHz ~ 96kHz
  • Input selector: differential stereo input, single-ended input, or pseudo-differential input with analog gain amplifier ×1; single-ended stereo input ×2
  • Channel-independent analog gain amplifier (0~18dB (2dB step), 18~36dB (3dB step))
  • ADC SNR: 106dB (fs = 48kHz, differential input, analog gain = 0dB)
  • Channel-independent digital volume control (24dB ~ -103dB, 0.5dB step, mute)
  • Digital high-pass filter for DC offset cancellation
  • 1Vrms full-scale input
  • Low-noise microphone power output ×2
• DAC: 24-bit DAC
  • 2ch × 3
  • Sampling frequency: fs = 8kHz ~ 96kHz
  • Single-ended output
  • 1Vrms output
  • DAC SNR: 108dB (fs = 48kHz)
  • Channel-independent digital volume control (12dB ~ -115dB, 0.5dB step, mute)
• SRC:
  • 2ch × 4
  • Input sampling frequency FSI = 8kHz ~ 192kHz, output sampling frequency FSO = 8kHz ~ 192kHz (FSO/FSI = 0.167 ~ 6.0)
• Digital interface:
  • Digital input port ×4 (TDM supported: 1 port)
  • Digital output port ×3 (TDM supported: 1 port)
  • Independent LRCK/BICK port ×3
  • Data format: MSB 32, 24-bit / LSB 24, 20, 16-bit / I²S / PCM short frame / PCM long frame
  • TDM input/output mode (max: 8ch / 256fs, fs = 96kHz)
• PLL circuit
• μP interface: SPI (6MHz max) / I²C (400kHz fast mode)
• Power supply:
  • Analog supply: AVDD: 3.0V ~ 3.6V (typ. 3.3V)
  • Digital supply: LVDD: 3.0V ~ 3.6V (typ. 3.3V) (3.3V→1.2V internal regulator)
  • I/F VDD33: 3.0V ~ 3.6V (typ. 3.3V)
  • TVDD: 1.7V ~ 3.6V (typ. 3.3V)
• Operating temperature range: -40 ~ 85°C
• Package: 48-pin LQFP (7mm × 7mm, 0.5mm pitch)