●12或24個(gè)獨(dú)立DAC通道
●24位分辨率
●步進(jìn)掃描電壓為1.2 µ V（整個(gè)± 10 V輸出范圍內(nèi)）
●綜合輸出噪聲 0.3 Vrms
●超低漂移 1 μ V /℃+ 1.5 ppm /℃
●浮地輸出
●輸出電流10 mA
●帶寬可在100 Hz和100k Hz切換
●AWG功能
●自適應(yīng)快速掃描
●柵極漏電流測量箱
●安裝在LNHR DAC輸出端和采樣端之間
●在運(yùn)行實(shí)驗(yàn)過程中監(jiān)測電流
●6個(gè)通道并聯(lián)
●PA ~ 10 µ A范圍
●不會增加?xùn)艠O電壓噪聲或惡化穩(wěn)定性
型號 | LNHR DACII-12 （New） | LNHR DACII-24 （New） | |
產(chǎn)品代碼 | SP1060-12 | SP1060-24 | |
輸出DAC 通道 | 12 | 24 | |
精度 | 24-bit | ||
輸出電壓范圍/步進(jìn) | ±10 V range / 1.2 µV step size | ||
漏電電流檢測 | pA detection is possible using ad-on gate leakage box | ||
輸出電壓噪聲 | 100 Hz BW: typ. 0.3 µVrms，100 kHz BW: typ. 4 µVrms | ||
溫漂 (for entire ±10V output range) | typ. 1 µV/ °C + 1.5 ppm/ °C (ppm from actual voltage output) | ||
超過8小時(shí)溫漂 | < 10 µV | ||
帶寬 | switchable between 100 Hz and 100 kHz for each DAC channel | ||
任意波形輸出 | 2 AWGs assigned to any channel | 4 AWGs assigned to any channel | |
自定義輸出波形 | Sine, triangle, sawtooth, ramp, pulse, gaussian-noise | ||
斜坡函數(shù) | 4 independent ramp generators with adaptive scan feature (gate compensation) | ||
輸出電流 | ±10 mA max on each channel ± 25 mA max on each 12-channel board | ||
接地 | Output ground is isolated from housing and computer interface | ||
輸出接地和外殼之間的外部偏置電壓 | 20 V max | ||
輸出阻抗 | 550 ? | 50 ? | |
尺寸 | 48 x 10 x 43 cm | ||
在敏感實(shí)驗(yàn)中應(yīng)用具有非常低波動(dòng)的超穩(wěn)定DC偏置電壓和高分辨率掃描電壓：
●低溫量子實(shí)驗(yàn)中高歐姆門的驅(qū)動(dòng)
●在量子輸運(yùn)測量中應(yīng)用源漏電壓
●控制對靜電電荷高度敏感的樣品，如約瑟夫遜結(jié)或量子點(diǎn)
噪聲密度譜和累積噪聲（單通道）
The outstanding noise performance of the LNHR DACII is shown here. This plot shows the noise density spectrum (red) and the integrated noise (blue) at 0 V, 5 V, and 10 V output and the low-bandwidth setting (BW=100 Hz). Data for high bandwidth setting (100k Hz) is shown in the user manual. For this specific measurement, the integrated noise from 0.1 Hz to 100 Hz ~170 nVrms at 0 V output; even better than the 300 nV stated in the table above . The European mains-frequency of 50 Hz and some of its harmonics can be identified on the noise density spectrum . However, those peaks do not add significantly to the total noise voltage as seen on the integrated noise . For frequencies above 100 Hz the noise density drops due to 100 Hz LP-filter and reaches the noise floor of 1 nV/√ Hz at 900 Hz originating from the differential amplifier used for measurements.
