LTC6990CS6#TRMPBF

LINEAR TECHNOLOGY  LTC6990CS6#TRMPBF  压控振荡器, TIMERBLOX系列, 6SOT-23

The is a voltage controlled Silicon Oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator VCO. The LTC6990 is part of the TimerBlox® family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6990"s internal master oscillator frequency. The output frequency is determined by this master oscillator and an internal frequency divider, NDIV, programmable to eight settings from 1 to 128. When the output is disabled, it is either held low or placed in a high impedance state as dictated by the Hi-Z bit value. When power is first applied to the LTC6990 the power-on reset POR circuit will initiate the start-up time. The OUT pin is floated high-impedance during this time.

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Fixed-frequency or voltage-controlled operation

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Single resistor programs fixed frequency with <1.5% maximum error

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Two resistors set VCO centre frequency and tuning range

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488Hz to 2MHz Frequency range

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Single-supply operation

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72µA Supply current at 100kHz

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500µs Start-up time

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>300kHz VCO bandwidth at 1MHz

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CMOS logic output sources/sinks 20mA

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50% Duty cycle square wave output

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Output enable selectable low or Hi-Z when disabled