电子说
硬件方案--采集板
8通道采集板是双层板，因为不涉及到高速信号，以及没有额外的干扰源，只要做好隔离及回路即可，PCB是铺铜版本。采集板主控是意法半导的STM32F103VET6，电源是最大输入20V，通过1颗ADI（诺亚半导体）可调LDO，LT1962EMS8#PBF转成5V电源，另外1颗ADI（诺亚半导体）可调LDO，LT1962EMS8#PBF转成3.3V电源给模拟电路供电，1颗LM1117-3.3V给其他的数字电路供电。因为要使用到ADC那么还要另外增加1颗电压基准芯片，TI（德州仪器）的REF5025AIDR。CH340N来实现串口转USB。信号采集放大通过1颗轨对轨运算放大器OPA2171AID，模数转换用的是1颗ADI（诺亚半导体）的16位ADC-AD7606BSTZ。模拟电压输出通过TI的1颗数模转换DAC-DAC8562SDGSR在由运算放大器输出给外部使用。
板子挺简单，小编之所以分享这套方案就是看中方案本身的通用性，如果复杂项目需使用多路电压信号采集，或者是要输出一定的可调模拟电压，可以直接把这套方案移植到复杂项目中去。
| Comment | Designator | LibRef | Quantity |
| Battery | BT1 | Battery | 1 |
| 22uF 16V | C1, C2, C12, C13, C22, C23, C27, C28, C35, C36, C40, C44, C47, C50, C57, C58, C61 | 10% 16V | 17 |
| 100nF | C3, C4, C5, C6, C7, C8, C9, C10, C11, C17, C20, C21, C25, C26, C29, C30, C31, C32, C33, C34, C37, C38, C45, C48, C49, C51, C52, C53, C54, C55, C56, C59, C60, C62, C63, C64, C65, CP1, CP2 | 0603 10% 50V | 39 |
| 1uF | C14, C15, C16 | 0603 10% 50V | 3 |
| 10nF | C18, C24 | 0603 10% 50V | 2 |
| 100uF ±10% | C19, C39 | 6032 100uF (107) 10% | 2 |
| 8pF | C41, C42 | 0603 10% 50V | 2 |
| 18pF | C43, C46 | 0603 10% 50V | 2 |
| WJ15EDGRC-3.81-8P | CN1, CN2 | WJ15EDGRC-3.81-8P | 2 |
| M7 | D1, D2 | SMA(DO-214AC) M7 | 2 |
| 红色led0603 | D3, D4 | 0603 蓝? | 2 |
| 10uH | L1 | Res3 | 1 |
| Header 2 | P1 | Header 2 | 1 |
| Header 5 | P2 | Header 5 | 1 |
| 2N7002 | Q1, Q2 | 2N7002 | 2 |
| 10Ω | R1, R37, R38, R42, R51 | 0603 1% | 5 |
| 1KΩ | R2, R3, R4, R5, R6, R7, R9, R10, R12, R13, R14, R15, R16, R17, R19, R20, R34, R35, R43, R45, R47, R49, R52, R53, R54, R55, R59, R60 | 0603 1% | 28 |
| 10K/NC | R8, R18, R23 | 0603 1% | 3 |
| 10KΩ | R11, R22, R25, R26, R27, R28, R29, R30, R39, R44, R46, R48, R50, R56, R57, R58, R61, R62 | 0603 1% | 18 |
| 0Ω | R21, R24, R32, R36 | 0603 1% | 4 |
| 768KΩ | R31 | 0603 1% | 1 |
| 249KΩ | R33 | 0603 1% | 1 |
| 4.7KΩ | R40, R41 | 0603 1% | 2 |
| AD7606 | U1 | AD7606 8通道16位ADC | 1 |
| MINI SD | U2 | MINI SD | 1 |
| STM32F103VET6 | U3 | STM32F103VET6 | 1 |
| LT1962EMS8#TRPBF | U4 | LT1962EMS8#TRPBF | 1 |
| LT1962EMS8-3.3#PBF | U5 | LT1962EMS8#TRPBF | 1 |
| REF5025AIDR | U6 | REF5025AIDR | 1 |
| LM1117-3.3V | U7 | L1117 | 1 |
| USB 方口 | U8, U10 | USB 方口 | 2 |
| CH340N | U9 | CH340N | 1 |
| OPA2171AID | U11, U13 | AD712AH | 2 |
| DAC8562SDGSR | U12 | DAC8562SDGSR | 1 |
| 32.768KHz | Y1 | SMD-3215_2P 32.768KHz 20ppm 12.5pF | 1 |
| 8MHz | Y2 | SMD-5032_2P 8MHz 20ppm 20pF | 1 |
软件方案
软件方案包含了AD7606功能代码，上位机协议说明及协议代码。
总体来说本方案是一个模块性的方案，吃透了以后相关多路电压采集，模拟电压输出等均可采用本方案的思路。
审核编辑：汤梓红
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