EM Electronics原裝A22直流毫伏放大器A23直流放大器 EM放大器
品牌：EM Electronics
類別：直流毫伏放大器
型號：A22
公司介紹：
EM Electronics專注于精密、低電平直流電壓放大器和低電平DC測量儀器的設計和制造。
應用于標準、校準、科學研究、低溫學、量熱法、聲納探測、超靈敏溫度測量、自動測試等領域。
EM Electronics有一個研究新儀器和技術的項目，正在繼續開發我們非常受歡迎的直流毫伏放大器模塊。
EM Electronics正在開發新的低電平直流測量儀器，該儀器將具有更先的規格，是低溫計量和常溫測量的理想選擇。
EM Electronics還將擴大直流毫伏放大器模塊的范圍，不久將宣布更多模塊。
EM Electronics正在開發一系列隔離器，用于直流納伏放大器，這將使測量低電平更加容易。
產品簡介：
A22型EM DC放大器是一種低噪聲放大器模塊，適用于靈敏的DC測量、數據采集和系統，是使用熱電偶進行非常靈敏的溫度測量的理想選擇。
A22的噪聲水平相當于一個約150歐姆的電阻。
當與普通型熱電偶一起用于溫度測量時，可以實現約20微開爾文的靈敏度。輸入電壓漂移非常低，與約1納伏的電壓靈敏度兼容。
A22具有測量放大器中所需的許多其他特征。100T或280dB的非常高的環路電壓增益意味著可以使用高的整體增益，由反饋電阻器控制，從而確保良好的線性，其精度由所使用的反饋電阻器定義。
A22型EM DC放大器是一種低噪聲放大器模塊，適用于靈敏的DC測量、數據采集和系統，是使用熱電偶進行非常靈敏的溫度測量的理想選擇。
A22的噪聲水平相當于一個約150歐姆的電阻。
當與普通型熱電偶一起用于溫度測量時，可以實現約20微開爾文的靈敏度。輸入電壓漂移非常低，與約1納伏的電壓靈敏度兼容。
A22具有測量放大器中所需的許多其他特征。100T或280dB的非常高的環路電壓增益意味著可以使用高的整體增益，由反饋電阻器控制，從而確保良好的線性，其精度由所使用的反饋電阻器定義。
產品參數：
Specification: DC Amplifier Model A22
Noise
Equivalent noise resistance approximately 150 ohms. Peak to peak noise voltage depends on bandwidth selected e.g. rise time constant 1 second, peak to peak noise voltage is approximately 3 nano-volts with the rms equivalent being about 600 pico-volts.
Offset Voltage
This is adjustable to zero by introducing a current into the feedback terminal. The internal feedback resistor is 10 ohms and so an adjustment current of plus and minus 10 nano-amps will give a voltage offset in the range of plus and minus 100 nano-volts. This is achieved by connecting a 1 Meg-ohm potentiometer across the internal supply, pins 11 and 12 and connecting a 500M ohm resistor from the wiper to the feedback connection, pin 4. The temperature coefficient of offset voltage is typically 1 nV per degree C. The initial, unbalanced offset voltage is typically plus or minus 50nV.
Offset Current
This is adjustable to zero, in a similar manner to the offset voltage adjustment, but using a 10 M-ohm resistor to pin 6. The temperature coefficient of offset current is typically 2 pA per degree C. The initial, unbalanced offset current is typically plus or minus 100pA.
Gain and Bandwidth
Open loop voltage gain 100T or 280dB. This gain is reduced to unity at 20KHz, at a rate of 30dB per decade. The amplifier is stable with *** feedback.
Input Resistance
Greater than 1G ohm at DC.
其它相關型號：
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EM Electronics ：DC Nanovolt Amplifier Model A10
EM Electronics ：Model N11a – D.C. Nanovoltmeter
EM Electronics ：Model N51 – D.C. Nanovolt Meter
EM Electronics ：Model P13a – D.C. Picovoltmeter
EM Electronics ：DC Amplifier Model A22
EM Electronics ：DC Amplifier Model A23
EM Electronics ：DC Amplifier Model A29
EM Electronics ：DC ***lator Model I71
EM Electronics ：DC ***lator Model I73
EM Electronics ：UTILITY PC BOARD UBc FOR A22, A23 and A29 with Passive Filter
EM Electronics ：UTILITY PC BOARD UBb FOR A22, A23 and A29 with Active Filter
