NV8a
Filtering signal conditioner for sensor signal matching with an asymmetric 0.5 ... 4.5 Volt 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
- 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.
Specifications
| Dimensions | see dimension drawing |
| Supply voltage | +9 ... +30 Volt (reverse polarity protected to -70 Volt) |
| 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 | 5 ppm/K |
| maximum output voltage range | 0.05 ... 4.95 Volt |
| Output signal range | 2.5 ± 2 Volt |
| Zero offset range | 2.4 ... 2.6 Volt (larger ranges, e.g. for B1 in Z-direction, on request) |
| Output impedance | approx. 100 Ohm |
| Thermal noise | 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, lenght 5.7mm, Ø 0.63mm gold-plated soldering pads optional |
| Weight | approx. 11g |
Dimensions (in mm)
Connections
Owing to its high accuracy the sensor supply voltage of +5V (max. 5mA) can be used as reference voltage for subsequent electronics, e.g. OPV or ADC.