NV8a

NV8a
Filtering signal conditioner for sensor signal matching with an asymmetric 0...5V output voltage

Features

low noise and low drift
no stabilized supply voltage necessary
integrated reverse polarity protection
outputs are short circuit proof
highly stable supply voltage for sensor operation
protection against reverse polarity of sensor connection
zero position and gain adjustable via potentiometers
electronic components hermetically sealed
optionally frequency programmable, active 4th order low pass filter
optional high pass filter
different connector options

Description

The NV8a amplifies, filters and normalizes the output signals of SEIKA sensors. The asymmetric output signal enables unproblematic, subsequent signal processing with standard measuring equipment, such as oscilloscopes, transient recorders, A/D converters, multimeters, etc., operating with this asymmetric signal level.
The NV8a requires a non-stabilized supply voltage in the range of 9...30 Volt. The NV8a provides a highly stable 5V voltage with short circuit current limitation as a sensor supply voltage.
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.

Application

The NV8a has its application anywhere a SEIKA sensor is, without great expenditures and under optimal compatibility, to be connected to application specific measuring equipment and subsequent adjustment of amplification and zero position are necessary. The use of an asymmetric output voltage requires minimal electronics for further signal processing.

Technical Specifications

Supply voltage	+9...+30 Volt (reverse polarity protected to -70Volt)
Current drawn excluding sensor	approx. 5mA
Operating temperature	-40°C ... +85°C
Internally generated sensor supply voltage	5.00 Volt
Temperature drift of sensor supply voltage	20ppm / Kelvin
Maximum output voltage range	0.05V ... 4.95V
Output signal range	(2.5±2)Volt
Zero offset range	2.4V ... 2.6V (larger ranges, e.g. for B1 in Z direction on request)
Output impedance	approx.100 Ohm
Signal-to-noise ratio	30µV_s.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, lenght 5.7mm, Ø 0.63mm gold-plated soldering pads optional

Dimensions (in mm)

Connections

Attention! Do not short circuit the supply voltage with the output.

No problem with GND - all at same potential, even in mulitaxial systems! The sensor supply voltage (5V, max. 5mA) can (because of the high accuracy) be used as reference voltage for subsequent electronics, e.g. OPV or ADC.

SEIKA front page

print version (pdf)

SEIKA Mikrosystemtechnik GmbH - Ellharter Strasse 10 - 87435 Kempten - Germany - EMail: seika@seika.de

H205S