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(hào)：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(cè)量?jī)x器的設(shè)計(jì)和制造。
應(yīng)用于標(biāo)準(zhǔn)、校準(zhǔn)、科學(xué)研究、低溫學(xué)、量熱法、聲納探測(cè)、超靈敏溫度測(cè)量、自動(dòng)測(cè)試等領(lǐng)域。
EM Electronics有一個(gè)研究新儀器和技術(shù)的項(xiàng)目，正在繼續(xù)開發(fā)我們非常受歡迎的直流毫伏放大器模塊。
EM Electronics正在開發(fā)新的低電平直流測(cè)量?jī)x器，該儀器將具有更先的規(guī)格，是低溫計(jì)量和常溫測(cè)量的理想選擇。
EM Electronics還將擴(kuò)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(fā)一系列隔離器，用于直流納伏放大器，這將使測(cè)量低電平更加容易。
產(chǎn)品簡(jiǎn)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(cè)量、數(shù)據(jù)采集和系統(tǒng)，是使用熱電偶進(jìn)行非常靈敏的溫度測(cè)量的理想選擇。
A22的噪聲水平相當(dāng)于一個(gè)約150歐姆的電阻。
當(dāng)與普通型熱電偶一起用于溫度測(cè)量時(shí)，可以實(shí)現(xiàn)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(cè)量放大器中所需的許多其他特征。100T或280dB的非常高的環(huán)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(cè)量、數(shù)據(jù)采集和系統(tǒng)，是使用熱電偶進(jìn)行非常靈敏的溫度測(cè)量的理想選擇。
A22的噪聲水平相當(dāng)于一個(gè)約150歐姆的電阻。
當(dāng)與普通型熱電偶一起用于溫度測(cè)量時(shí)，可以實(shí)現(xiàn)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(cè)量放大器中所需的許多其他特征。100T或280dB的非常高的環(huán)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(chǎn)品參數(shù)：
Specification: DC Amplifier Model A22
Noise
Equivalent noise resistance approximaby 150 ohms. Peak to peak noise voltage depends on bandb selected e.g. rise time constant 1 second, peak to peak noise voltage is approximaby 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 Bandb
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(guān)型號(hào)：
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EM Electronics ：Model P13a – D.C. Picovoltmeter
EM Electronics ：DC Amplifier Model A22
EM Electronics ：DC Amplifier Model A23
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EM Electronics ：DC ***lator Model I71
EM Electronics ：DC ***lator Model I73
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EM Electronics ：UTILITY PC BOARD UBb FOR A22, A23 and A29 with Active Filter
