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Voltage Amplifiers: Low-Frequency

Series DLPVA

Offset Drift
The temperature drift of the input offset voltage is one of the decisive characteristics for the quality of a DC voltage amplifier. FEMTO Voltage Amplifiers have the DC performance of precision amplifiers. Therefore, even the 100 dB gain is well suited for DC-coupling without the need for permanent offset voltage adjustments.

Bandwidth
The bandwidth of an ideal variable gain amplifier is independent of the gain setting which is very important for measuring fast signals and pulses. The bandwidth of FEMTO's DLPVA voltage amplifiers remains constant at 100 kHz (-3 dB) up to the highest gain setting. Wideband noise can be reduced by switching the upper cut-off-frequency to 1 kHz.

Controls
Parameters, e.g. gain settings, bandwidth etc. can all be controlled by local switches directly on the amplifier. Operation is straightforward and the chosen gain setting is displayed by LEDs. For remote control, each switch is provided with a corresponding TTL-Bit. Mixed operation is also possible.

Flexibility
Six different DLPVA voltage amplifier models offer a high degree of flexibility. Our customers can choose either a single ended or a true differential input. The input impedance is 1 MΩ or lower for our bipolar models and an exceptional high 1 TΩ for our FET models allowing measurements of signals from very high impedance sources. Finally the noise is as low as 0.4 nV/√Hz for the model DLPVA-100-BUN-S.

Applications
Universal Low-Frequency Amplifier
Automated Measurements
Industrial Sensors
Detector Preamplifier
Integrated Measurement Systems

Low Noise Input/Output Cable: CAB-LN1 Low Noise Cable
The LUCI-10 amplifier interface allows remote control of FEMTO amplifiers and photoreceivers with a remote control capability from a standard Windows PC with USB port.

Voltage Amplifiers - Low-Frequency

Click Part # to view pdf datasheet.
Model DLPVA-100-BUN-S DLPVA-100-BLN-S DLPVA-100-B-S DLPVA-100-B-D DLPVA-100-F-S DLPVA-100-F-D
Input stage Single Ended,
bipolar
Single Ended,
bipolar
Single Ended,
bipolar
True Differential,
bipolar
Single Ended,
FET
True Differential,
FET
Input 1 kΩ, BNC 1 MΩ, BNC 1 MΩ, BNC 1 MΩ, LEMO 1 TΩ, BNC 1 TΩ, LEMO
Lower Cut-Off Frequency 1.5 Hz
(AC only)
DC/1.5 Hz DC/1.5 Hz DC/1.5 Hz DC/1.5 Hz DC/1.5 Hz
Upper Cut-Off Frequency [kHz] 1/100 1/100 1/100 1/100 1/100 1/100
Gain [dB] 40/60/80/100 40/60/80/100 20/40/60/80 20/40/60/80 20/40/60/80 20/40/60/80
Input Noise Voltage [nV/Hz] 0.4 0.7 2.4 3.6 5.5 6.9
Input Voltage Drift [μV/°C ] - 0.5 0.7 0.7 1.3 1.3
CMRR - - - 120 dB max. - 120 dB max.
Output 50 Ω, BNC 50 Ω, BNC 50 Ω, BNC 50 Ω, BNC 50 Ω, BNC 50 Ω, BNC
Output Voltage +10V
@ >1 MΩ
+10V
@ >1 MΩ
+10V
@ >1 MΩ
+10V
@ >1 MΩ
+10V
@ >1 MΩ
+10V
@ >1 MΩ
Control Interface TTL/CMOS,
Opto-Isolated
TTL/CMOS,
Opto-Isolated
TTL/CMOS,
Opto-Isolated
TTL/CMOS,
Opto-Isolated
TTL/CMOS,
Opto-Isolated
TTL/CMOS,
Opto-Isolated
Interface Software Option
LUCI-10 Control Interface Software and Hardware option
Offset adjustable by trimpot or external analog control voltage. LED gain setting and overload indication. Output short-circuit protected. Power supply + 15 V via 3-pin LEMO socket. A mating connector is provided with the device. Optional power supply PS-15 available. For further information please view the datasheet.

Typical Performance Characteristics

FEMTO Product Catalog (pdf)

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