LTC6903CMS8#TRPBF

LTC6903 is a serial port programmable oscillator. It is a low power self contained digital frequency sources providing a precision frequency from 1KHz to 68MHz, set through a serial port. It requires no external components other than a power supply bypass capacitor, and they operate over a single wide supply range of 2.7V to 5.5V. It features a proprietary feedback loop that linearizes the relationship between digital control setting and frequency, resulting in a very simple frequency setting equation. Where OCT is a 4-bit digital code and DAC is a 10bit digital code. It is controlled by a convenient SPI compatible serial interface. Application includes precision digitally controlled oscillator, power management, direct digital frequency synthesis (DDS) replacement, replacement for DAC and VCO, switched capacitor filter clock.

• Maximum initial frequency accuracy is ±0.75% (f = 1.039KHz, V+ = 3V, CLOAD = 5pF)
• 1.1% maximum total frequency accuracy (over all settings, V+ = 2.7V, CLOAD = 5pF)
• 10ppm/°C typical frequency drift over temperature (TA = 25°C, V+ = 2.7V to 5.5V)
• 0.25mA typical V+ supply current, shutdown (VS = 2.7V, TA = 25°C)
• Supply voltage range from 2.7V to 5.5V (applied between V+ and GND)
• 0.4% typical timing jitter (1.039KHz to 8.5MHz, TA = 25°C)
• Duty cycle is 50% typical at (1.039KHz to 1MHz)
• Duty cycle range from 49 to 51% (1.039KHz to 1MHz, TA = 25°C)
• 45ohm typical output resistance (CLK, CLK pins, V+ = 2.7V, TA = 25°C)
• 8 lead plastic MSOP package, operating temperature range from 0°C to 70°C

注释

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