正如我 在 《技术参考手册》中看到的，PGA 用于 放大输入电压，但我 无法理解 下图中 PGA 的含义是什么？ 
可以为 ADC 输入选择独立的 PGA、而不是 ADC 通道(A0-A10 B C)？
太棒了！
您好'2277、
随后的"模拟组连接"图显示了一个模拟组的通用内部结构：
后续的"模拟引脚和内部连接"表显示了给定封装的特定连接：
| 引脚名称 | 组名称 | 封装 | 始终连接(无多路复用器) | 比较器子系统(MUX) | AIO 输入 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 PZ | 下午64 | 56 RSH | ADCA | ADCB | ADCC | PGA | DAC | 高正 | 高负值 | 低正电压 | 低负 | |||
| VREFHIA | - | 25 | 16. | 14. | ||||||||||
| VREFHIB | - | 24 | ||||||||||||
| VREFHIC | - | |||||||||||||
| VREFLOA | - | 27. | 17. | 15. | 解答13. | |||||||||
| VREFLOB | - | 26 | B13. | |||||||||||
| VREFLOC | - | 问题13. | ||||||||||||
| 模拟组1 | CMP1 | |||||||||||||
| 答3. | G1_ADCAB | 10. | 答3. | HPMXSEL = 3 | HMXSEL = 0 | LPMXSEL = 3 | LNMXSEL = 0 | AIO233 | ||||||
| A2/B6/PGA1_OF | PGA1_OF | 9. | 9. | 8. | 答2. | B6. | PGA1_OF | HPMXSEL = 0 | LPMXSEL = 0 | AIO224 | ||||
| C0 | G1_ADCC | 19. | 12. | 10. | C0 | HPMXSEL = 1 | HMXSEL = 1 | LPMXSEL = 1 | LNMXSEL = 1. | AIO237 | ||||
| PGA1_IN | PGA1_IN | 18 | PGA1_IN | HPMXSEL = 2 | LPMXSEL = 2 | |||||||||
| PGA1_GND | PGA1_GND | 14. | 10. | 9. | PGA1_GND | |||||||||
| - | PGA1_OUT(1) | 解答11. | B7. | PGA1_OUT | HPMXSEL = 4 | LPMXSEL = 4 | ||||||||
| 模拟组2 | CMP2 | |||||||||||||
| 问题5. | G2_ADCAB | 35. | 问题5. | HPMXSEL = 3 | HMXSEL = 0 | LPMXSEL = 3 | LNMXSEL = 0 | AIO234 | ||||||
| A4/B8/PGA2_OF | PGA2_OF | 36. | 23 | 21. | A4 | B8. | PGA2_OF | HPMXSEL = 0 | LPMXSEL = 0 | AIO225 | ||||
| C1 | G2_ADCC | 29. | 18 | 16. | C1 | HPMXSEL = 1 | HMXSEL = 1 | LPMXSEL = 1 | LNMXSEL = 1. | AIO238 | ||||
| PGA2_IN | PGA2_IN | 30 | PGA2_IN | HPMXSEL = 2 | LPMXSEL = 2 | |||||||||
| PGA2_GND | PGA2_GND | 32 | 20. | 18 | PGA2_GND | |||||||||
| - | PGA2_OUT(1) | 解答12. | B9. | PGA2_OUT | HPMXSEL = 4 | LPMXSEL = 4 | ||||||||
| 模拟组3 | CMP3 | |||||||||||||
| B3/VDAC | G3_ADCAB | 8. | 8. | 7. | B3 | VDAC | HPMXSEL = 3 | HMXSEL = 0 | LPMXSEL = 3 | LNMXSEL = 0 | AIO242 | |||
| B2/C6/PGA3_OF | PGA3_OF | 7. | 7. | 6. | B2. | C6 | PGA3_OF | HPMXSEL = 0 | LPMXSEL = 0 | AIO226 | ||||
| C2 | G3_ADCC | 21. | 13. | 11. | C2 | HPMXSEL = 1 | HMXSEL = 1 | LPMXSEL = 1 | LNMXSEL = 1. | AIO244 | ||||
| PGA3_IN | PGA3_IN | 20. | PGA3_IN | HPMXSEL = 2 | LPMXSEL = 2 | |||||||||
| PGA3_GND | PGA3_GND | 15. | 10. | 9. | PGA3_GND | |||||||||
| - | PGA3_OUT(1) | B10. | C7 | PGA3_OUT | HPMXSEL = 4 | LPMXSEL = 4 | ||||||||
| 模拟组4 | CMP4 | |||||||||||||
| B5 | G4_ADCAB | B5 | HPMXSEL = 3 | HMXSEL = 0 | LPMXSEL = 3 | LNMXSEL = 0 | AIO243 | |||||||
| B4/C8/PGA4_OF | PGA4_OF | 39. | 24 | 22. | B4 | C8 | PGA4_OF | HPMXSEL = 0 | LPMXSEL = 0 | AIO227 | ||||
| C3 | G4_ADCC | 31. | 19. | 17. | C3 | HPMXSEL = 1 | HMXSEL = 1 | LPMXSEL = 1 | LNMXSEL = 1. | AIO245 | ||||
| PGA4_IN | PGA4_IN | PGA4_IN | HPMXSEL = 2 | LPMXSEL = 2 | ||||||||||
| PGA4_GND | PGA4_GND | 32 | 20. | 18 | PGA4_GND | |||||||||
| - | PGA4_OUT(1) | B11. | C9 | PGA4_OUT | HPMXSEL = 4 | LPMXSEL = 4 | ||||||||
| 模拟组5 | CMP5 | |||||||||||||
| A7 | G5_ADCAB | A7 | HPMXSEL = 3 | HMXSEL = 0 | LPMXSEL = 3 | LNMXSEL = 0 | AIO235 | |||||||
| A6/PGA5_OF | PGA5_OF | 6. | 6. | A6 | PGA5_OF | HPMXSEL = 0 | LPMXSEL = 0 | AIO228 | ||||||
| C4 | G5_ADCC | 17. | 11. | C4 | HPMXSEL = 1 | HMXSEL = 1 | LPMXSEL = 1 | LNMXSEL = 1. | AIO239 | |||||
| PGA5_IN | PGA5_IN | 16. | PGA5_IN | HPMXSEL = 2 | LPMXSEL = 2 | |||||||||
| PGA5_GND | PGA5_GND | 13. | 10. | 9. | PGA5_GND | |||||||||
| - | PGA5_OUT(1) | A14. | PGA5_OUT | HPMXSEL = 4 | LPMXSEL = 4 | |||||||||
| 模拟组6 | CMP6 | |||||||||||||
| A9 | G6_ADCAB | 38. | A9 | HPMXSEL = 3 | HMXSEL = 0 | LPMXSEL = 3 | LNMXSEL = 0 | AIO236 | ||||||
| A8/PGA6_OF | PGA6_OF | 37. | A8 | PGA6_OF | HPMXSEL = 0 | LPMXSEL = 0 | AIO229 | |||||||
| C5 | G6_ADCC | 28. | C5 | HPMXSEL = 1 | HMXSEL = 1 | LPMXSEL = 1 | LNMXSEL = 1. | AIO240 | ||||||
| PGA6_IN | PGA6_IN | PGA6_IN | HPMXSEL = 2 | LPMXSEL = 2 | ||||||||||
| PGA6_GND | PGA6_GND | 32 | 20. | 18 | PGA6_GND | |||||||||
| - | PGA6_OUT(1) | 解答15. | PGA6_OUT | HPMXSEL = 4 | LPMXSEL = 4 | |||||||||
| 模拟组7 | CMP7. | |||||||||||||
| B0 | G7_ADCAB | 41. | B0 | HPMXSEL = 3 | HMXSEL = 0 | LPMXSEL = 3 | LNMXSEL = 0 | AIO241. | ||||||
| A10/B1/C10/PGA7_OF | PGA7_OF(2) | 40 | 25 | 23 | 回答10 | B1 | C10. | PGA7_OF | HPMXSEL = 0 | LPMXSEL = 0 | AIO230 | |||
| C14. | G7_ADCC | 44. | C14. | HPMXSEL = 1 | HMXSEL = 1 | LPMXSEL = 1 | LNMXSEL = 1. | AIO246 | ||||||
| PGA7_IN | PGA7_IN | 43. | PGA7_IN | HPMXSEL = 2 | LPMXSEL = 2 | |||||||||
| PGA7_GND | PGA7_GND | 42. | PGA7_GND | |||||||||||
| - | PGA7_OUT(1) | B12. | 问题11. | PGA7_OUT | HPMXSEL = 4 | LPMXSEL = 4 | ||||||||
| 其他模拟产品 | ||||||||||||||
| A0/B15/C15/DACA_OUT | 23 | 15. | 13. | A0 | B15. | C15 | DACA_OUT | AIO231 | ||||||
| A1/DACB_OUT | 22. | 14. | 12. | A1 | DACB_OUT | AIO232 | ||||||||
| C12. | C12. | AIO247 | ||||||||||||
| - | 温度传感器(1) | B14. | ||||||||||||
