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参数资料
| 型号： | EVAL-ADAU1781Z |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/92页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADAU1781 |
| 标准包装： | 1 |
| 系列： | SigmaDSP® |
| 主要目的： | 音频编解码器 |
| 嵌入式： | 是，DSP |
| 已用 IC / 零件： | ADAU1781 |
| 主要属性： | 立体声，24 位，8 ~ 96 kHz 采样率，GUI 工具 |
| 次要属性： | * |
| 已供物品： | * |
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ADAU1781
Rev. B | Page 24 of 92
THEORY OF OPERATION
The ADAU1781 is a low power audio codec with an integrated,
programmable SigmaDSP audio processing core. It is an all-in-one
package that offers high quality audio, low power, small size, and
many advanced features. The stereo ADC and stereo DAC each
have a dynamic range (DNR) performance of at least 96.5 dB and
a total harmonic distortion plus noise (THD + N) performance
of at least 90 dB. The serial data port is compatible with I2S, left-
justified, right-justified, and TDM modes for interfacing to digital
audio data. The operating voltage range is 1.8 V to 3.65 V, with
an on-board regulator generating the internal digital supply voltage.
The record path includes very flexible input configurations that
can accept differential or single-ended analog microphone inputs
as well as two stereo digital microphone inputs. There is also a
beep input pin (BEEP) dedicated to analog beep signals that are
common in digital still camera applications. A microphone bias
pin that can power electrets-type microphones is also available.
Each input signal has its own programmable gain amplifier (PGA)
for input volume adjustment. An automatic level control (ALC)
can be implemented in the SigmaDSP audio processing core to
maintain a constant input recording volume.
The ADCs and DACs are high quality, 24-bit Σ-Δ converters
that operate at selectable 64× or 128× oversampling rates. The
base sampling rate of the converters is set by the input clock rate
and can be further scaled with the converter control register
settings. The converters can operate at sampling frequencies
from 8 kHz to 96 kHz. The ADCs and DACs also include very
fine-step digital volume controls.
The playback path allows input signals and DAC outputs to be
mixed into speaker and/or line outputs. The speaker driver is
capable of driving 400 mW into an 8 load.
The SigmaDSP audio processing core can be programmed to
enhance the audio quality and improve the end-user experience.
The flexibility offered by the SigmaDSP core allows this codec
to be used for a wide variety of low power applications. Signal
processing blocks available for use in the SigmaDSP core include
the following:
Dynamics processing, including compressors, expanders,
gates, and limiters
Chime, tone, and noise generators
Enhanced stereo capture (ESC)
Wind noise detection and filtering
Stereo spatialization
Dynamic bass
Loudness
Filtering, including crossover, equalization, and notch
GPIO controls
Mixers and multiplexers
Volume controls and mute
The ADAU1781 can generate its internal clocks from a wide
range of input clocks by using the on-board fractional PLL.
The PLL accepts inputs from 11 MHz to 20 MHz.
The ADAU1781 is provided in a small, 32-lead, 5 mm × 5 mm lead
frame chip scale package (LFCSP) with an exposed bottom pad.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-ADAU1962AZ | 制造商:Analog Devices 功能描述:EVAL BOARD FOR ADAU1962A - Boxed Product (Development Kits) 制造商:Analog Devices 功能描述:Eval Board for ADAU1962A |
| EVAL-ADAU1966AZ | 制造商:Analog Devices 功能描述:EVAL BOARD FOR ADAU1962A - Boxed Product (Development Kits) |
| EVAL-ADAU1966Z | 功能描述:BOARD EVAL FOR ADAU1966 RoHS:是 类别:编程器，开发系统 >> 评估板 - 数模转换器 (DAC) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- DAC 的数量:4 位数:12 采样率（每秒）:- 数据接口:串行，SPI? 设置时间:3µs DAC 型:电流/电压 工作温度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| EVAL-ADAU1966Z | 制造商:Analog Devices 功能描述:ADAU1966, DAC, SIGMA DELTA, SPI, I2C, EV |
| EVAL-ADAU1978Z | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad Analog-to-Digital Converter (ADC) |
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