DDPCA-300,德国FEMTO可变增益电流放大器-德国FEMTO,DDPCA-300

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DDPCA-300,德国FEMTO可变增益电流放大器

品牌：FEMTO

型号：DDPCA-300

加工定制：否

产品特性：可变增益电流放大器

产品简介：品牌:FEMTO ;型号:DDPCA-300 ;加工定制:否

深圳市博纳德精密仪器有限公司

详细介绍：

DDPCA-300可变增益电流放大器
*大峰值噪声0.4 fA
9级可变增益：10⁴~10¹¹V/A
240 dB Dynamic Range for Sub-fA to mA Measurements
Adjustable Voltage on Input for DUT Biasing
Compact Housing for Use Close to the Signal Source
Manual and Remote Control

Sub Femto Ampere Sensitivity
The variable gain sub femto ampere amplifier DDPCA-300 is the latest addition to FEMTO's broad range of low noise transimpedance amplifiers. Its exceptional design achieves input noise values down to 0.2 fA/√Hz and 0.4 fA peak-peak. The gain can be set over a very wide range from 10⁴ up to 10¹³ V/A either manually or by a remote interface. Thus, the amplifier covers a large dynamic range of more than 240 dB for the measurement of currents from sub femto amps up to milli amps by simply switching the gain range. The compact housing is optimized for use close to the signal source avoiding signal perturbations or noise pick-up due to long cables. Various filters are integrated to adapt the amplifier bandwidth to varying signal conditions. Thus, the signal to noise ratio and measurement speed can be optimized by selecting the proper filter setting for a specific application. And even in the highest gain settings the measurement speed is sufficient to measure femto amp currents in real-time without the need for external averaging or long test periods (see figure 1 below).
Low Drift for Stable Long-Term Performance
At the femto ampere level drift and offset currents can easily cause measurement errors and shifting baselines. The design of the DDPCA-300 is optimized for long-term stability and extremely low drift. The below figure shows the amplifier's baseline drift of less than 0.5 fA measured over a period of more than 7 hours. In case of inevitable (e.g. temperature related) offsets an trimpot is provided for cancelling unwanted offset currents and for nulling of the baseline.
Device Characterization by Source Biasing
The very high sensitivity of the DDPCA-300 can be utilized in low current applications like characterization of high resistance semiconductors (e.g. MOS or JFETs) or quantum-dot devices. An adjustable voltage is supplied directly at the amplifier input for biasing the device under test (DUT). Changing the bias voltage manually or through the remote interface in the range of +/- 10 V allows the characterization of the DUT for different bias voltages in spectroscopic measurements. For applications not requiring a bias voltage like photocurrent measurements or beam monitoring in particle physics the bias voltage can be easily disabled.
Applications
Photo and Ionization Detector Amplifier I/V Characterization of MOS and JFET Structures DC Measurement of Ultra Low Currents Quantum and Biotech Experiments Spectroscopy High Resistance Measurements Easy to Use Femto Amp Add-on to Existing Digital Voltmeter or A/D Converter

Model	DDPCA-300
Transimpedance [V/A]	10⁴	10⁵	10⁶	10⁷	10⁸	10⁹	10¹⁰	10¹¹	10¹²	10¹³
*Bandwidth (- 3 dB) [Hz]**	400	400	400	400	150	150	20	20	1	1
*Rise Time (10% - 90%) [ms]**	0.8	0.8	0.8	0.8	2.3	2.3	17	17	350	350
*Integrated Input Noise (Peak-Peak)**	7 nA	7 nA	70 pA	70 pA	1.2 pA	1.2 pA	50 fA	50 fA	2 fA	2 fA
Spectral Input Noise Density [/√Hz]	45 pA	45 pA	0.5 pA	0.5 pA	15 fA	15 fA	1.3 fA	1.3 fA	0.2 fA	0.2 fA
Accuracy Performance	Gain ± 1 %
Adjustable Low Pass Filter	3 Settings: Full Bandwidth, 0.7 Hz and 0.1 Hz
Output Performance	± 10 V, ± 30 mA
Bias Voltage	± 10 V, max. 10 mA, Connected to Amplifier Input, Adjustable by Trimpot or Remote Control Voltage
Power Supply	± 15 V, + 70 mA / - 15 mA typ., ± 150 mA recommended
Control Interface	4 Opto-Isolated Digital Inputs, TTL/CMOS Compatible, Analog Bias Control Voltage Input
Case	170 x 60 x 45 mm (L x W x H), Weight 320 g (0.74 lb.)