EM 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(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)新的低電平直流測量儀器，該儀器將具有更先的規(guī)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(fā)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。

EM A22直流毫伏放大器 A23直流放大器產品簡介：

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(tǒng)，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(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測量、數據采集和系統(tǒng)，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(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：

EM Electronics ：A20a DC Sub-Nanovolt Amplifier

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