Features: · 1kHz to 68MHz Square Wave Output· 0.5% (Typ) Initial Frequency Accuracy· Frequency Error <1.1% Over All Settings· 0.1% Resolution· 1.7mA Typical Supply Current (f < 1MHz, VS = 3V)· 3V to 5.5V Single Supply Operation· Jitter <0.4% Typical 1kHz to 8MHz· Easy to Use SPI (LTC6903)...
LTC6903: Features: · 1kHz to 68MHz Square Wave Output· 0.5% (Typ) Initial Frequency Accuracy· Frequency Error <1.1% Over All Settings· 0.1% Resolution· 1.7mA Typical Supply Current (f < 1MHz, VS = 3V)·...
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The LTC®6903/LTC6904 are low power self contained digital frequency sources providing a precision frequency from 1kHz to 68MHz, set through a serial port. The LTC6903/LTC6904 require no external components other than a power supply bypass capacitor, and they operate over a single wide supply range of 3V to 5.5V.
The LTC6903/LTC6904 feature a proprietary feedback loop that linearizes the relationship between digital control
setting and frequency, resulting in a very simple frequency setting equation:f=2OCT·2078(HZ)/(2-DAC/1024);kHz <f< 68 MHz
Where OCT is a 4-bit digital code and DAC is a 10-bit digital code.
The LTC6903 is controlled by a convenient SPI compatible serial interface. The LTC6904 uses an industry standard I2C compatible interface.