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SC1226/AD9235 模數(shù)轉(zhuǎn)換器（ADC）數(shù)字化高頻寬動態(tài)范圍信號選型


系統(tǒng)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(yīng)力信號采集起來轉(zhuǎn)換為對應(yīng)的電信號，所得電信號交由高速A/D芯片轉(zhuǎn)換為數(shù)字信號，該A/D轉(zhuǎn)換器推薦使用國產(chǎn)芯熾SC1226（替換AD9235）芯片，然后通過調(diào)理電路轉(zhuǎn)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(tài)分析系統(tǒng)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(shù)轉(zhuǎn)換器，專為數(shù)字化高頻寬動態(tài)范圍信號而設(shè)計。


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


3、SC1226直流規(guī)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(qū)動0.5V至3.6V邏輯電路。


4、一個單端CLK輸入負責控制轉(zhuǎn)換器運作。一個任選的時鐘占空比穩(wěn)定器在全速和多種時鐘占空比條件下實現(xiàn)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(tài)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