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AK7755EN Datasheet(PDF) 1 Page - Asahi Kasei Microsystems |
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AK7755EN Datasheet(HTML) 1 Page - Asahi Kasei Microsystems |
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1 / 109 page  [AK7755] 014006643-E-00 2014/10 - 1 - 1. General Description The AK7755 is a highly integrated digital signal processor, including a mono ADC, a stereo audio CODEC, a MIC pre-amplifier, a line-out amplifier and digital audio I/F. The audio DSP has 2560step at fs = 48kHz parallel processing power. As the AK7755 is a RAM based DSP, it is programmable for user requirements such as high performance hands free function and acoustic effects. The AK7755 is available in a space saving small 36-pin QFN package. 2. Features DSP - Word length: 24-bit (Data RAM 24-bit floating point) - Instruction cycle: 8.1ns (2560fs at fs=48kHz) - Multiplier 24 x 24 → 48-bit (double precision available) - Divider 20 / 20 → 20-bit (with floating point normalization function) - ALU: 52-bit arithmetic operation (with overflow margin 4-bit) - Program RAM: 4096 × 36-bit - Coefficient RAM: 2048 × 24-bit - Data RAM: 2048 × 24-bit (24-bit floating point) - Offset Register: 32 × 13-bit - Delay RAM: 8192 × 24-bit - Accelerator Coefficient RAM: 2048 × 20-bit - Accelerator Data RAM: 2048 × 16-bit - JX pins (Interrupt) - Master/Slave Operation - Master Clock: 2560fs (Internally Generated by PLL from 32, 48, 64, 128, 256 and 384fs clock) Two Digital Interfaces (I/F1, I/F2) - Digital Signal Input Port (4ch): MSB justified 24-bit, LSB justified 24/20/16-bit, I 2S - Digital Signal Input Port (6ch): MSB justified 24-bit, LSB justified 24/20/16-bit, I 2S - Short / Long Frame - 24-bit linear, 8-bit A-law, 8-bit μ-law - TDM 256fs (8ch) MSB justified and I 2S formats Stereo 24-bit ADC: - Sampling Frequency: fs=8kHz ~ 96kHz - ADC Characteristics S/(N+D): 91dB, DR, S/N: 102dB - Two-Channel Analog Input Selector (Differential, Single-ended Input) - Channel Independent Mic Analog Gain Amplifier (0~18dB (2dB Step), 18~36dB (3dB Step)) - Analog DRC (Dynamic Range Control) - Channel Independent Digital Volume (24~-103dB, 0.5dB Step Mute) - Digital HPF for DC Offset Cancelling Mono 24-bit ADC - Sampling Frequency: 8kHz ~ 96kHz - ADC Characteristics S/(N+D): 90dB; DR, S/N: 100dB - Line Amplifier: 21dB ~ -21dB, 3dB Step - Digital Volume (24dB ~ -103dB, 0.5dB step, Mute) - Digital HPF for DC Offset Cancelling DSP with Mono ADC Stereo CODEC + Mic/Lineout Amp AK7755 |
Similar Part No. - AK7755EN |
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Similar Description - AK7755EN |
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