常見(jiàn)例句The reference voltage, VREF, is applied externally and can be set up to the supply voltage, VDD. 基準(zhǔn)電壓（VREF）由外部提供，最高可以設(shè)置為電源電壓VDD。As in the previous application, the ADC outputs a digital code, Dout, the ratio of AIN to VREF. 和在這種先前應(yīng)用相比,模數(shù)轉(zhuǎn)換器輸出一個(gè)數(shù)字式編碼An external reference can also be applied and varied from 1 V to +VCC, with an analog input range of 0 V to VREF. 也可以使用外部基準(zhǔn)電壓，并可在1V至+VCC范圍內(nèi)變化，模擬輸入范圍為0V至VREF。 返回 VREF