FEMTO® - DLPVA switchable voltage amplifier series

Brief description

The DLPVA series comprises adjustable voltage amplifiers designed for measuring low voltages, and is divided into two product series: the DLPVA-100/101 series with bandwidths of 100 kHz and the DLPVA-500 series with bandwidths up to 500 kHz. Various versions with single-ended or differential inputs, as well as different input resistances, are available for each series.

Features

Switchable gain up to 100 dB (×100,000)
Bandwidth DC to 100 kHz (DLPVA-100/101)
Bandwidth DC to 500 kHz (DLPVA-500)
Input impedance up to 1 TΩ
DC-drift down to 500 nV/K
Switchable AC/DC-coupling
Input noise down to 400 pV/√Hz
Local and remote control

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DLPVA-100/101 – 100 kHz

Model	DLPVA-100-BUN-S	DLPVA-101-BLN-S	DLPVA-101-B-S	DLPVA-101-B-D	DLPVA-101-F-S	DLPVA-101-F-D
Input stage	Single ended, bipolar	Single ended, bipolar	Single ended, bipolar	Differential, bipolar	Single ended, FET	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 switchable)	DC (1.5 Hz switchable)	DC (1.5 Hz switchable)	DC (1.5 Hz switchable)	DC (1.5 Hz switchable)
Upper Cut-Off Frequency	100 kHz (1 kHz switchable)	100 kHz (1 kHz switchable)	100 kHz (1 kHz switchable)	100 kHz (1 kHz switchable)	100 kHz (1 kHz switchable)	100 kHz (1 kHz switchable)
Gain	40, 60, 80, 100 dB	40, 60, 80, 100 dB	20, 40, 60, 80 dB	20, 40, 60, 80 dB	20, 40, 60, 80 dB	20, 40, 60, 80 dB
Input Voltage Noise	0.4 nV/√Hz	0.7 nV/√Hz	2.0 nV/√Hz	3.0 nV/√Hz	5.0 nV/√Hz	6.5 nV/√Hz
Input Voltage Drift	—	0.5 µV/K	0.7 µV/K	0.7 µV/K	1.3 µV/K	1.3 µV/K
CMRR	—	—	—	120 dB max.	—	120 dB max.
Output	<100 Ω, BNC	50 Ω, BNC
Output Voltage	±10 V (@ 100 kΩ Load)
Control Interface	3 opto-isolated digital inputs, TTL/CMOS compatible
Datasheet
Quotation Request

DLPVA-500 – 500 kHz

Model	DLPVA-500-BLN-S	DLPVA-500-B-S	DLPVA-500-B-D	DLPVA-500-F-S	DLPVA-500-F-D
Input stage	Single ended, bipolar	Single ended, bipolar	Differential, bipolar	Single ended, FET	Differential, FET
Input	1 MΩ, BNC	1 MΩ, BNC	1 MΩ, LEMO^®	1 TΩ, BNC	1 TΩ, LEMO^®
Lower Cut-Off Frequency	DC (1.5 Hz switchable)	DC (1.5 Hz switchable)	DC (1.5 Hz switchable)	DC (1.5 Hz switchable)	DC (1.5 Hz switchable)
Upper Cut-Off Frequency	450 kHz (1 kHz switchable)	500 kHz (1 kHz switchable)	500 kHz (1 kHz switchable)	500 kHz (1 kHz switchable)	500 kHz (1 kHz switchable)
Gain	40, 60, 80, 100 dB	20, 40, 60, 80 dB	20, 40, 60, 80 dB	20, 40, 60, 80 dB	20, 40, 60, 80 dB
Input Voltage Noise	0.7 nV/√Hz	2.0 nV/√Hz	3.0 nV/√Hz	5.0 nV/√Hz	6.5 nV/√Hz
Input Voltage Drift	0.5 µV/K	0.7 µV/K	0.7 µV/K	1.3 µV/K	1.3 µV/K
CMRR	—	—	120 dB max.	—	120 dB max.
Output	50 Ω, BNC
Output Voltage	±10 V (@ 100 kΩ Load)
Control Interface	3 opto-isolated digital inputs, TTL/CMOS compatible
Datasheet
Quotation Request

Offset adjustable by trimpot or external control voltage. Indication of selected gain setting by LED. Output short-circuit protected. Power supply 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.

Cable recommendation

For detailed information on which cable we recommend for which application and why, please see our Cable Selection Guide.

	Recommended FEMTO cable	Why?
Input and output	RF cable	Focus on maximum EM shielding and/or 50 Ω impedance matching

Plugs and sockets

FEMTO amplifiers and photoreceivers are supplied with either a BNC or SMA socket as standard, depending on the model. We are happy to fit other plugs and sockets according to your requirements. In addition to BNC, SMA and type N, other types are also available on request. Simply add your request to your quotation enquiry or contact our support team.

Customised products

Do none of the products fulfil your requirements? We offer customer-specific versions of our products, e.g. adapted bandwidth, amplification or optimisation for special signal sources. OEM versions, for example for larger projects and product integrations, are also possible. Our technical support team looks forward to your enquiry. You may also find something suitable among the related products.

Technical support

Low 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 amplifiers remains constant at 100 kHz (-3 dB) respectively. 500 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 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 400 pV/√Hz for the model DLPVA-100-BUN-S.