Filtering signal conditioner for sensor signal matching with symmetrical +/- 4 V voltage output



The NV4a amplifies, filters and normalizes the output signals of SEIKA sensors. The symmetrical output signal enables unproblematic subsequent signal processing with standard measuring instruments such as oscilloscopes, transient recorders, A/D converters, multimeters, etc.
Multiple internal switching variants allow for optimal adaptation of signal processing parameters, such as settling time, filter cut-off frequencies and amplification and zero point adjustment, to the measuring task.


The NV4a has its application anywhere a SEIKA sensor is, without much expenditure and under optimal compatibility, to be connected to application specific measuring equipment with optimal matching conditions and subsequent adjustments to amplification and zero voltage are necessary.

Technical Specifications

Dimensions see dimension drawing
Supply voltage 9V ... 30V (polarity protected up to -70Volt)
Current drawn excluding sensors approx. 5mA
Operating temperature 0...70°C
Internally generated sensor supply voltage 5.00 Volt
Temperature drift of sensor supply voltage 20ppm / Kelvin
Output signal range ±3.5 Volt
Offset adjust range 2.4V ... 2.6V (larger ranges on request)
Output impedance approx. 100 Ohm
Signal-to-noise ratio 30µVs.s.
Signal-to-noise ratio with standard sensors approx. 80dB
Frequency range 0...10Hz, 0...200Hz, 0...2kHz, custom ranges on request
Electrical connections pin connector 2.54mm, length 5.7mm, Ø 0.63mm gold-plated; solder pads optional

Dimensions (in mm)


Attention! Do not short circuit the supply voltage with the output.
The negative operating voltage for the symmetrical output voltage is internally generated from the only positive supply voltage!


SEIKA Mikrosystemtechnik GmbH - Söllerweg1- D 87487 Wiggensbach - email: seika@seika.de - Tel.+49 8370 9290070 - FAX:+49 8370 9290079