- 您现在的位置：买卖IC网 > PDF目录10253 > ADAU1702JSTZ (Analog Devices Inc)IC AUDIO PROC 2ADC/4DAC 48-LQFP PDF资料下载
参数资料
| 型号： | ADAU1702JSTZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 40/52页 |
| 文件大小： | 0K |
| 描述： | IC AUDIO PROC 2ADC/4DAC 48-LQFP |
| 标准包装： | 1 |
| 系列： | SigmaDSP® |
| 类型： | 音频处理器 |
| 应用： | 车载，监视器，MP3 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 托盘 |
| 产品目录页面： | 776 (CN2011-ZH PDF) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页当前第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页
ADAU1702
Rev. C | Page 45 of 52
MULTIPURPOSE PINS
The ADAU1702 has 12 multipurpose (MP) pins that can be
individually programmed for use as serial data inputs, serial
data outputs, digital control inputs/outputs to and from the
SigmaDSP core, or inputs to the 4-channel auxiliary ADC. These
pins allow the ADAU1702 to be used with external ADCs and
DACs. They also use analog or digital inputs to control settings
such as volume control, or use output digital signals to drive
LED indicators. Every MP pin has an internal 15 kΩ pull-up
resistor.
AUXILIARY ADC
The ADAU1702 has a 4-channel, auxiliary, 8-bit ADC that can
be used in conjunction with a potentiometer to control volume,
tone, or other parameter settings in the DSP program. Each of
the four channels is sampled at the audio sampling frequency (fS).
Full-scale input on this ADC is 3.0 V, thus the step size is
approximately 12 mV (3.0 V/256 steps). The input resistance of
the ADC is approximately 30 kΩ. Table 61 indicates which four
MP pins are mapped to the four channels of the auxiliary ADC.
The auxiliary ADC is enabled for those pins by writing 1111 to the
appropriate portion of the multipurpose pin configuration
registers.
The auxiliary ADC is turned on by setting the AAEN bit of the
auxiliary ADC enable register (see Table 56).
Noise on the ADC input can cause the digital output to change
constantly by a few LSBs. If the auxiliary ADC is used to control
volume, this constant change causes small gain fluctuations. To
avoid this, add a low-pass filter or hysteresis to the auxiliary ADC
signal path by enabling either function in the auxiliary ADC and
power control register (Address 2082), as described in Table 54.
The filter is enabled by default when the auxiliary ADC is
enabled. When data is read from the auxiliary ADC registers,
two bytes (12 bits of data plus zero padded LSBs) are available
because of this filtering.
20k
10k
S1
S2
1.8pF
AUX ADC
INPUT PIN
05
79
8-
03
0
Figure 31. Auxiliary ADC Input Circuit
Figure 31 shows the input circuit for the auxiliary ADC. Switch S1
enables the auxiliary ADC and is set by Bit 15 of the auxiliary
ADC enable register. The sampling switch, S2, operates at the
audio sampling frequency.
The auxiliary ADC data registers can be written to directly after
AACW in the DSP core control register has been set. In this
mode, the voltages on the analog inputs are not written into the
registers, but rather the data in the registers is written from the
control port.
PVDD supplies the 3.3 V power for the auxiliary ADC analog
input. The digital core of the auxiliary ADC is powered with the
1.8 V DVDD signal.
Table 61. Multipurpose Pin Auxiliary ADC Mapping
Multipurpose Pin
Function
MP0
Not applicable
MP1
Not applicable
MP2
ADC1
MP3
ADC2
MP4
Not applicable
MP5
Not applicable
MP6
Not applicable
MP7
Not applicable
MP8
ADC3
MP9
ADC0
MP10
Not applicable
MP11
Not applicable
GENERAL-PURPOSE INPUT/OUTPUT PINS
Use the general-purpose input/output (GPIO) pins as either
inputs or outputs. These pins are readable and are set either
through the control interface or directly by the SigmaDSP core.
When set as inputs, these pins can be used with push-button
switches or rotary encoders to control DSP program settings.
Use digital outputs to drive LEDs or external logic to indicate
the status of internal signals and to control other devices.
Examples of this use include indicating signal overload, signal
present, and button press confirmation.
When set as an output, each pin can typically drive 2 mA. This
is enough current to directly drive some high efficiency LEDs.
Standard LEDs require about 20 mA of current and can be driven
from a GPIO output with an external transistor or buffer. Because
of issues that can arise from simultaneously driving or sinking a
large current on many pins, take care in the application design to
avoid connecting high efficiency LEDs directly to many or all of
the MPx pins. If many LEDs are required, use an external driver.
When the GPIO pins are set as open-collector outputs, they
should be pulled up to a maximum voltage of 3.3 V (the voltage
on IOVDD).
SERIAL DATA INPUT/OUTPUT PORTS
The flexible serial data input and output ports of the ADAU1702
can be set to accept or transmit data in 2-channel format or in an
8-channel TDM stream. Data is processed in twos complement,
MSB-first format. The left-channel data field always precedes
the right-channel data field in the 2-channel streams. In TDM
mode, Slot 0 to Slot 3 are in the first half of the audio frame, and
Slot 4 to Slot 7 are in the second half of the frame. TDM mode
allows fewer multipurpose pins to be used, freeing more pins
for other functions. The serial modes are set in the serial output
and serial input control registers.
相关PDF资料 |
PDF描述 |
|---|---|
| CS8406-CSZ | IC XMITTER DGTL 192KHZ 28SOIC |
| 14281-18PG-3ES | CONN RCPT 18POS PNL MNT PIN |
| AD7708BRU | IC ADC 16BIT R-R 8/10CH 28-TSSOP |
| MS3106F20-29PW | CONN PLUG 17POS STRAIGHT W/PINS |
| MS3106F20-29P | CONN PLUG 17POS STRAIGHT W/PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADAU1702JSTZ-RL | 功能描述:IC AUDIO PROC 2ADC/4DAC 48-LQFP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:SigmaDSP® 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP（10x10） 包装:Digi-Reel® 其它名称:497-11050-6 |
| ADAU1761 | 制造商:AD 制造商全称:Analog Devices 功能描述:SigmaDSP Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL |
| ADAU1761BCPZ | 功能描述:IC SIGMADSP CODEC PLL 32LFCSP RoHS:是 类别:集成电路 (IC) >> 接口 - 编解码器 系列:SigmaDSP® 标准包装:2,500 系列:- 类型:PCM 数据接口:PCM 音频接口 分辨率（位）:15 b ADC / DAC 数量:1 / 1 三角积分调变:是 S/N 比，标准 ADC / DAC (db):- 动态范围，标准 ADC / DAC (db):- 电压 - 电源，模拟:2.7 V ~ 3.3 V 电压 - 电源，数字:2.7 V ~ 3.3 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-VFBGA 供应商设备封装:80-BGA MICROSTAR JUNIOR（5x5） 包装:带卷 (TR) 其它名称:296-21257-2 |
| ADAU1761BCPZ | 制造商:Analog Devices 功能描述:IC, AUDIO CODEC, 24BIT, 96KHZ, LFCSP-32 |
| ADAU1761BCPZ-R7 | 功能描述:IC SIGMADSP CODEC PLL 32LFCSP RoHS:是 类别:集成电路 (IC) >> 接口 - 编解码器 系列:SigmaDSP® 标准包装:2,500 系列:- 类型:立体声音频 数据接口:串行 分辨率（位）:18 b ADC / DAC 数量:2 / 2 三角积分调变:是 S/N 比，标准 ADC / DAC (db):81.5 / 88 动态范围，标准 ADC / DAC (db):82 / 87.5 电压 - 电源，模拟:2.6 V ~ 3.3 V 电压 - 电源，数字:1.7 V ~ 3.3 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-WFQFN 裸露焊盘 供应商设备封装:48-TQFN-EP（7x7） 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。