Datasheet > AK7755EN_16

AK7755EN_16

更新时间： 2022-02-26 12:43:42

品牌	Logo	应用领域
AKM		/
页数	文件大小	规格书
109页	3020K
描述
DSP with Mono ADC Stereo CODEC Mic/Lineout Amp

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AK7755EN_16 数据手册

[AK7755]

AK7755

DSP with Mono ADC Stereo CODEC + Mic/Lineout Amp

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, I²S

- Digital Signal Input Port (6ch): MSB justified 24-bit, LSB justified 24/20/16-bit, I²S

- Short / Long Frame

- 24-bit linear, 8-bit A-law, 8-bit μ-law

- TDM 256fs (8ch) MSB justified and I²S 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

014006643-E-00

2014/10

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