ES9023P Stereo Audio DAC Verification Board
Author: Filtering Capacitor Schematic Drawing: Filtering Capacitor PCB Drawing: Filtering Capacitor
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ES9023P is an audio support 24bit/192kHz Digital-to-analog converter (DAC) with integrated line driver for 2VRMS output.
Features:
It adopts ESS SABER DAC technology, which combines high sound quality and high cost performance;
it adopts ESS's Hyperstream(R) patented architecture and time-domain jitter elimination technology to achieve jitter-free recording-level sound quality, with a dynamic range of 112dB;
The single-channel 3.3/3.6V power supply has
an internal integrated charge pump to generate negative voltage to power the line output op amp, eliminating the impact of the output capacitor on the output sound quality; the
output voltage amplitude can be controlled by a resistor to avoid clipping distortion ( clipping);
hard control mode, no MCU required, easy for DIY;
pop sound suppression when switching on and off. The following is the 9023 part of
the schematic diagram : Power supply part: Physical picture (05/11 update) Back interface definition (slightly different from the previous PCM5102, MCK must be connected to the MCK from the I2S host) Group photo
BOM download
PCB_PCB_ES9023 verification board_2022-09-23.pdf
PCB_PCB_ES9023 verification board_2022-09-23.json
PCB_ES9023 verification board_2022-09-23.pcbdoc
Gerber_PCB_ES9023 verification board.zip
Schematic_ES9023P Stereo Audio DAC Verification Board_2022-09-23.pdf
SCH_ES9023P stereo audio DAC verification board_2022-09-23.json
Sheet_1_2022-09-23.schdoc
61652
Laowujia gigaware sound card
Introduction: Laowujia VT1620A USB sound card reference schematic diagram and added coaxial output circuit
版本更新记录（先看）
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V1.1
1）更改了标题和简介及正文中的老王至老五，因为这个USB声卡是老五家的，这两家经常搞混，麻了（
2）设计了参考PCB，支持模拟输出和同轴输出，麦克风输入没有加
V1.0
最初版本，只有参考原理图
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又在老五家败了一些电子破（bao）烂（zang）回来了，其中就有这个其貌不扬的USB声卡，看起来和那些山上产的勒涩货差不多。
吃完饭闲的没事，于是在网上搜索主控芯片的数据手册，一看不简单，官网介绍如下：
然后又查到SMSL的某款USB解码器也是用的VT1620A
看到这里，抄板的欲望正在高涨，遂打开立创，原理图走起~
根据datasheet（见附件）和实际的PCBA，绘制了原理图（与实际的线路略有出入）
主控部分：
其中芯片被配置成USB Dongle的模式，支持音频2in2out，S/PDIF_OUT（只有配置成该模式S/PDIF_OUT才会生效）
官方datasheet对各种模式的说明及各个模式的支持情况如下图：
SPI FLASH部分电路（用于存储定制固件）：
然后又看了一眼datasheet，这个flash是可选的，芯片内部应该是有默认固件（
同轴及光纤音频输出电路（新增）：
参考某款USB界面上的同轴输出电路，根据需要可以自己加上...
同轴信号输出从芯片的pin28引出，前提是芯片的3个config引脚（config2：0）配置成000
Fsel（1：0）也要配置成00，以使用芯片内部rom
存在疑惑/问题的地方：
芯片的PDRGL20,PDRGL33的功能不是很清楚，猜测PD=Power Down（掉电），可能是内置LDO的EN端，不知道是什么电平使能（实际电路这两个引脚是悬空的，猜测低电平关闭LDO）；
芯片工作的时候发热比较大，估计是内置LDO导致发热偏大，也许用外置LDO可以解决这个问题；
麦克风输入及偏置电路与实际PCBA上的不一样，参考了网上的电路接法；
VT1620A.pdf
BOM下载
PCB_PCB_老王家gigaware声卡_2022-09-23.pdf
PCB_PCB_老王家gigaware声卡_2022-09-23.json
PCB_老王家gigaware声卡_2022-09-23.pcbdoc
Gerber_PCB_老王家gigaware声卡.zip
Schematic_老五家gigaware声卡_2022-09-23.pdf
SCH_老五家gigaware声卡_2022-09-23.json
Sheet_1_2022-09-23.schdoc
61653
LM27762低噪声正负输出电荷泵验证板
简介：TI LM27762（C134018）电荷泵验证板
本验证板用于验证德州仪器 LM27762(立创商城编号C134018)低噪声电荷泵的功能。
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LM27762是一个具有集成 LDO 的低噪声正负输出电荷泵
特性（摘自官网）：
提供 ±1.5V 至 ±5V 可调节、超低噪声正负输出。
输入电压范围为 2.7V 至 5.5V，输出电流高达 ±250mA。
工作电流仅为 390µA，并且关断电流的典型值为 0.5µA，因此可为功率放大器、数模转换器 (DAC) 偏置以及其他大电流、低噪声、负电压应用提供理想性能。
采用小型封装，所需外部组件很少。
参考了官方EVM的设计，本验证板的输出电压为±4.5V，根据需要可以改变反馈电阻的阻值来配置其他电压;
输出电压计算公式为：VOUT=1.2*(R1+R2)/R2
输出端的使能通过EN+,EN-（pin12，pin8）实现，高电平有效。两引脚同时拉低，芯片进入关断模式。
带POWER GOOD功能（pin1），开漏输出。输出电压全为正常时，该脚常为低电平；输出电压任有一个异常时，该引脚输出高电平，用于故障指示。
数据手册链接：https://www.ti.com.cn/cn/lit/gpn/lm27762
BOM下载
PCB_PCB_LM27762低噪声正负输出电荷泵验证板_2022-09-23.pdf
PCB_PCB_LM27762低噪声正负输出电荷泵验证板_2022-09-23.json
PCB_LM27762低噪声正负输出电荷泵验证板_2022-09-23.pcbdoc
Gerber_PCB_LM27762低噪声正负输出电荷泵验证板.zip
Schematic_LM27762低噪声正负输出电荷泵验证板_2022-09-23.pdf
SCH_LM27762低噪声正负输出电荷泵验证板_2022-09-23.json
Sheet_1_2022-09-23.schdoc
61654
PCM51XX通用验证板
简介：（已验证_OK）基于LCSC C964085 官方验证板修改，增加了对PCM512X系列的支持
描述：
本验证板基于立创商城C964085 PCM5102音频立体声DAC解码器验证板修改
增加了对PCM512X(PCM5121/PCM5122)的支持，PCM512X在此验证板上被配置成硬连线模式，单纯使用其DAC功能；
增加了对3线I2S的支持（3线I2S无主时钟信号MCK/SCK），通过短接DAC的SCK脚到地来实现；
增加了一个电平选择跳线，来控制PCM512X的AGNS（增益选择）脚，低电平时输出增益为2VRMS ,高电平时输出增益为1VRMS ；
模拟输出端仅保留先进的3.5mm音频输出口，数字端去除了模式选择排针；
在5V电源输入端增加了一颗TVS，用于ESD保护。
注意：
本验证板支持的芯片
对于PCM510X系列：PCM5100,PCM5101,PCM5102
PCM5100A,PCM5101A,PCM5102A
PCM5100A-Q1,PCM5101A-Q1,PCM5102A-Q1（带Q1的是车规级）
对于PCM510X系列：PCM5121,PCM5122
实物展示：
接到CM6631A数字界面上，立马出声了，耳机那端传出了动听的音乐......
这个数字界面最大支持32bit/384k（但是不怎么稳定，估计是6631固件的缘故），调到最大规格后用这个验证板来放音没有任何杂音
测试视频：
网盘地址：https://pan.baidu.com/s/1JX9opbWTkPyZhCnlKTJMgA 提取码：5102
附录：
芯片数据手册
PCM5100,PCM5101,PCM5102: https://www.ti.com.cn/cn/lit/gpn/pcm5100
PCM5100A,PCM5101A,PCM5102A(以及Q1): https://www.ti.com.cn/cn/lit/gpn/pcm5100a
PCM5121,PCM5122: https://www.ti.com.cn/cn/lit/gpn/pcm5122
BOM下载
PCB_PCB_PCM51XX通用验证板_2022-09-23.pdf
PCB_PCB_PCM51XX通用验证板_2022-09-23.json
PCB_PCM51XX通用验证板_2022-09-23.pcbdoc
Gerber_PCB_PCM51XX通用验证板.zip
Schematic_PCM51XX通用验证板_2022-09-23.pdf
SCH_PCM51XX通用验证板_2022-09-23.json
Sheet_1_2022-09-23.schdoc
61655
QCC303X蓝牙接收器
简介：基于BTM334模块制作的蓝牙音乐接收器，也可以作为USB声卡
基本概况：
本蓝牙接收器采用BTM334蓝牙模块，使用了模块的I2S作为音频输出，DAC采用TI的PCM5121，支持USB声卡功能。
蓝牙接收器的框图如下：
具体细节：
蓝牙模块采用的芯片是高通（Qualcomm）的QCC3034，支持普通的SBC,AAC编码，还支持高通自家的aptX，aptX-HD，aptX-LL编码，保证了蓝牙音频的品质；亦可以通过USB连接电脑作为USB声卡，免驱，最高支持16bit/48k。DAC（数模转换器）采用了一颗来自TI（德仪）的PCM5121，特点是内置电荷泵产生负电源，可以做到输出免耦合电龙，支持硬控/SPI/I2C，带固定音频处理功能，最高支持32bit/384k，2VRMS输出，个人感觉听感不错。（但是我只使用了H/W Mode，浪费了这个芯片大部分功能，可惜）电源方面采用两颗LDO，AZ1117负责蓝牙模块的部分供电，ME6211这颗高速高PSRR的LDO负责DAC的供电，以保证DAC供电的纯净。USB接口采用极其方便的type-c，根据插入的方向可在仅供电和供电+USB声卡功能之间选择（注意：若接收器已经连接到电脑，同时蓝牙已连接手机，需要长按Play/Pause键几秒钟来断开蓝牙连接，以启用USB声卡功能）。板载3个轻触开关，功能分别是播放/暂停、上一曲/音量-、下一曲/音量+，长按播放键切断蓝牙连接，板子上还预留了I2S接口（通过ZH1.5-5pin连接器引出，定义见原理图）。
连接电脑
连接手机
关于听感/音质：
几乎听不到底噪，声音清晰，解析度挺高，不拖泥带水，比电脑/手机内置的CODEC音质要好，挺感动的。
制作时遇到的问题/改进:
1、被耳机座的定义坑了，导致只有左声道出声，只能给板子做了个小手术，飞了根线到耳机插座右声道，飞线后左右声道声音正常。
修改后的原理图耳机接口部分如下图：
2、DAC芯片除了可以采用PCM512x（PCM5121,5122），也可以用PCM510xA(例如PCM5102A)，后者除了没有SPI、I2C、DSP，其他功能相同，焊接时PCM510xA的pin1对准PCB上三角指向的焊盘（即PCM512x和PCM510xA的pin1）。
3、蓝牙模块除了可以用BTM334,还可以换成以下模块，完全pin对pin，除了部分功能存在差异。
链接：http://www.tianjiarun.com/post/40.html
*设计本蓝牙接收器时用到的datasheet和其他参考资料会放在附件中
pcm5102a.pdf
pcm5121.pdf
SJR-BTM524_SCH.pdf
BOM下载
PCB_PCB_QCC303X蓝牙接收器_2022-09-23.pdf
PCB_PCB_QCC303X蓝牙接收器_2022-09-23.json
PCB_QCC303X蓝牙接收器_2022-09-23.pcbdoc
Gerber_PCB_QCC303X蓝牙接收器.zip
Schematic_QCC303X Bluetooth receiver_2022-09-23.pdf
SCH_QCC303X Bluetooth receiver_2022-09-23.json
Sheet_1_2022-09-23.schdoc
61656
USB mini DAC
Introduction: PCM2706+ES9023P mini USB DAC (official version, verified)
V1.1 update: Increased the width of 5V and 3.3V power lines, optimized the layout and wiring of some components, as shown below:
This is a mini sound card made with PCM2706C+ES9023P, which is the one mentioned in the last ES9023P verification board The project
was made a few months ago (the first version, the design defect caused output clipping and distortion)
was turned out a few days ago, the design bugs were fixed, and released for everyone~
The USB interface is PCM2706C, 16bit/48k, listen to it MP3 and lossless CD are still good, no need to drive or firmware;
the decoder chip is ES9023P, 24bit/192k specifications, comes with a headphone driver, I personally think it sounds good, the SOP16 package is also easy to weld; the
power supply of 2706 and 9023 is provided by a ME6211 respectively
Below is a physical picture of the first version. You can see that C8 does not have a parallel resistor, resulting in clipping distortion.
The new version has been redesigned, added a resistor, the DIF pin is directly connected to ground, and the LDO package is replaced by SOT-23, which is easier to buy and has better sound. It should be no problem.
The official version of the 3D drawing:
The BOM list is as follows
BOM_USB mini DAC_2022-04-08.csv
BOM download
PCB_PCB_USB Mini DAC_2022-09-23.pdf
PCB_PCB_USB Mini DAC_2022-09-23.json
PCB_USB mini DAC_2022-09-23.pcbdoc
Gerber_PCB_USB mini DAC.zip
Schematic_USB mini DAC_2022-09-23.pdf
SCH_USB mini DAC_2022-09-23.json
Sheet_1_2022-09-23.schdoc
61657
Positive and negative linear regulated power supply
Introduction: A simple linear regulated power supply composed of 78xx and 79xx, which can power preamplifiers, headphone amplifiers and other applications that require positive and negative voltages.
The structure of the power board is very simple, consisting of a rectifier filter part and a voltage stabilizing part. Four 4007s form a FULL BRIDGE RECTIFIER (full bridge rectifier), two big green wave... (bah, it's filtering) capacitors are responsible for filtering the positive and negative voltages, and 7812/7912 are responsible for voltage stabilization (of course they can be replaced with others) Voltage stabilizing IC), two small-capacity electrolytics are used to smooth the output, four 0.1uf film capacitors are used to filter out high-frequency interference, and there is an LED at each output end for work indication.
This power board can power the power amplifier preamplifier, headphone amplifier, DAC I/V conversion and LPF operational amplifier, etc. The voltage stabilizing IC can be replaced with other voltages according to needs, such as 7805/7905, 7809/7909, 7815/7915. The rectifier part adopts a discrete design and is compatible with more types of rectifiers (DO-41 packaged normal speed, fast recovery, and Schottky are available). AC input is recommended to be dual 12~18V (linear voltage regulation, higher voltage will cause the voltage regulator to increase heat, the voltage after rectification and filtering should not exceed the maximum input voltage of the voltage regulator!).
Okay, the picture above~ (the picture is the first version, the LED is in SMD form, the official version has been changed to 3mm direct plug)
I used ON's MC7812/MC7912
to measure the output voltage, the accuracy is pretty good~
The PCB Gerber file and BOM table are here Attachments, if you are interested, you can buy the materials to make them yourself~
Gerber_PCB_positive and negative power supply.zip
BOM_positive and negative linear regulated power supply.xlsx
BOM download
PCB_PCB_Positive and Negative Power Supply_2022-09-23.pdf
PCB_PCB_Positive and Negative Power Supply_2022-09-23.json
PCB_positive and negative power supply_2022-09-23.pcbdoc
Schematic_positive and negative linear regulated power supply_2022-09-23.pdf
SCH_positive and negative linear regulated power supply_2022-09-23.json
Sheet_1_2022-09-23.schdoc
61658
32u4_mu
Introduction: Tian Zi 68 complete keyboard
Among the Tianzi 68pcb files, only the ones without lights and slots are suitable for 3D printing shells and acrylic stacked shells;
BOM download
PCB_PCB_32u4_1mm fully slotted copy_2022-09-23.pdf
PCB_PCB_32u4_1mm full slot copy_2022-09-23.json
PCB_32u4_1mm fully slotted copy_2022-09-23.pcbdoc
Gerber_PCB_32u4_1mm fully slotted copy.zip
PCB_PCB_32u4_Horizontal slotting copy_2022-09-23.pdf
PCB_PCB_32u4_Horizontal slot copy_2022-09-23.json
PCB_32u4_Horizontal slot copy_2022-09-23.pcbdoc
Gerber_PCB_32u4_Horizontal slot copy.zip
PCB_PCB_32u4_Horizontal slotting_2022-09-23.pdf
PCB_PCB_32u4_Horizontal slotting_2022-09-23.json
PCB_32u4_Horizontal slotting_2022-09-23.pcbdoc
Gerber_PCB_32u4_Horizontal slot.zip
PCB_PCB_32u4_1mm fully slotted_2022-09-23.pdf
PCB_PCB_32u4_1mm fully slotted_2022-09-23.json
PCB_32u4_1mm fully slotted_2022-09-23.pcbdoc
Gerber_PCB_32u4_1mm fully slotted.zip
PCB_PCB_32u4_0.5mm fully slotted_2022-09-23.pdf
PCB_PCB_32u4_0.5mm fully slotted_2022-09-23.json
PCB_32u4_0.5mm fully slotted_2022-09-23.pcbdoc
Gerber_PCB_32u4_0.5mm fully slotted.zip
PCB_PCB_32u4_mu_2022-09-23.pdf
PCB_PCB_32u4_mu_2022-09-23.json
PCB_32u4_mu_2022-09-23.pcbdoc
Gerber_PCB_32u4_mu.zip
Schematic_32u4_mu_2022-09-23.pdf
SCH_32u4_mu_2022-09-23.json
Sheet_1_2022-09-23.schdoc
61659
electronic
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