STEL-1175+125/CM

The STEL-1175+125/CM is one member of the STEL-1175 series.The STEL-1175 modulated numerically controlled oscillator(MNCO)uses digital techniques to provide a cost-effective solution for low noise signal sources.The device can operate at clock frequency up to 125 MHz and provides high frequency resolution and high spectral purity of outputs up to 50 MHz.

Features of the STEL-1175 are:(1)sine or cosine signal generation- 12-bit outputs;(2)microprocessor compatible inputs;(3)low power dissipation.The STEL-1175 also features phase modulation at rates up to 25%of the clock frequency.In many applications the NCO is used with a digital to analog converter(DAC)to generate an analog waveform which approximates an ideal sinewave.The spectral purity of this synthesized waveform is a function of many variables including the phase and amplitude quantization,the ratio of the clock frequency to output frequency,and the dynamic characteristics of the DAC.

The absolute maximum ratings of the STEL-1175 can be summarized as:(1)storage temperature Tstg:-40 to +125°C;(2)supply voltage on VDD VDDmax:-0.3 to +7 V;(3)input voltage VI(max):-0.3 to VDD+0.3;(4)DC input current Ii:±10 mA.Stresses greater than those shown below may cause permanent damage to the device.Exposure of the device to these conditions for extended periods may also affect device reliability.All voltages are referenced to VSS.The products described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for any use that includes fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for any use where chance of failure is intolerable (i.e., submersible repeater and artificial satellite).