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SC1226/AD9235 模數轉換器（ADC）數字化高頻寬動態范圍信號選型


系統一般分為采集、傳輸和分析三大模塊，采集部分負責將起重機多點的振動和應力信號采集起來轉換為對應的電信號，所得電信號交由高速A/D芯片轉換為數字信號，該A/D轉換器推薦使用國產芯熾SC1226（替換AD9235）芯片，然后通過調理電路轉換為A/D芯片所能接受的電壓信號。
芯熾SC1226用于起重機狀態分析系統主要特點如下：


1、SC1226是一款12位80/65/40/20MSps低功耗3V電源供電的模數轉換器，專為數字化高頻寬動態范圍信號而設計。


2、SC1226非常適合要求苛刻的成像和通信應用，其交流性能，包括80MHz采樣下70.08dB信噪比和83dB無雜散動態范圍，用于遠遠超過奈奎斯特頻率的信號。


3、SC1226直流規格包括±1LSB INL（典型值），±0.3LSB DNL（典型值）和無漏失碼。輸入端參考噪聲很低，僅為0.96LSBRMS。一個單獨的輸出電源使輸出能驅動0.5V至3.6V邏輯電路。


4、一個單端CLK輸入負責控制轉換器運作。一個任選的時鐘占空比穩定器在全速和多種時鐘占空比條件下實現了高性能。


5、0.5V至3.3V輸出電源，功耗低至218mW。


6、80MHz采樣，30.5MHz輸入：信噪比(SNR):70.08dBFS；無雜散動態范圍(SFDR):83.48dBFS。


Model1, 2 Temperature Range Package Description Package Option
AD9235BRU-20 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRURL7-20 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRUZ-20 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRUZRL7-20 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRU-40 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRURL7-40 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRUZ-40 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRUZRL7-40 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRU-65 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRURL7-65 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRUZ-65 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BRUZRL7-65 –40°C to +85°C 28-Lead Thin Shrink Small Outline Package (TSSOP) RU-28
AD9235BCPZ-20 –40°C to +85°C 32-Lead Lead Frame Chip Scale Package (LFCSP_WQ) CP-32-7
AD9235BCPZRL7-20 –40°C to +85°C 32-Lead Lead Frame Chip Scale Package (LFCSP_WQ) CP-32-7
AD9235BCPZ-40 –40°C to +85°C 32-Lead Lead Frame Chip Scale Package (LFCSP_WQ) CP-32-7
AD9235BCPZRL7-40 –40°C to +85°C 32-Lead Lead Frame Chip Scale Package (LFCSP_WQ) CP-32-7
AD9235BCPZ-65 –40°C to +85°C 32-Lead Lead Frame Chip Scale Package (LFCSP_WQ) CP-32-7
AD9235BCPZRL7-65 –40°C to +85°C 32-Lead Lead Frame Chip Scale Package (LFCSP_WQ) CP-32-7