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MAX2750 Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX2750 Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 6 page ![]() 2.4GHz Monolithic Voltage-Controlled Oscillators 4 _______________________________________________________________________________________ Pin Description 0.1 1 10 PHASE NOISE OFFSET FREQUENCY (MHz) -150 -130 -140 -110 -120 -90 -100 -80 -60 -70 -50 TEMPERATURE ( °C) -5 -4 -3 -2 -40 0 -20 20 40 60 80 MAX2751 OUTPUT POWER vs. TEMPERATURE ƒO 3ƒO FREQUENCY ∆ = 48dBc ∆ MKR -30.00dB ∆ = 30dBc NORMALIZED HARMONIC OUTPUT SPECTRUM 2ƒO Typical Operating Characteristics (continued) (Circuit of Figure 1, VCC = +3.0V, VTUNE = +0.4V to +2.4V, V SHDN ≤ 2V, TA = +25°C, unless otherwise noted.) -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 0 468 2 101214 18 16 20 OSCILLATOR TURN-ON TIME TIME ( µs) 8 µs -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 0 468 2 101214 18 16 20 OSCILLATOR TURN-ON TIME TIME ( µs) 4 µs PIN NAME FUNCTION 1 BYP VCO Bypass. Bypass with a 0.1µF capacitor to GND. 2 TUNE Oscillator Frequency Tuning Voltage Input. High-impedance input with a voltage input range of +0.4V (low frequency) to +2.4V (high frequency). 3 GND Ground Connection for Oscillator and Biasing. Requires a low-inductance connection to the circuit board ground plane. 4 SHDN Shutdown Logic Input. A high-impedance input logic level low disables the device and reduces supply current to less than 1.0µA. A logic level high enables the device. 5VCC1 Bias and Oscillator DC Supply Voltage Connection. Bypass separately from PIN6 with a 220pF capacitor to GND for low noise and low spurious content performance from the oscillator. 6VCC2 Output Buffer DC Supply Voltage Connection. Bypass separately from PIN5 with a 220pF capacitor to GND for best high frequency performance. 7 OUT Buffered Oscillator Output. Incorporates an internal DC blocking capacitor. OUT is internally matched to 50 Ω. 8 GND Ground Connection for Output Buffer. Requires a low-inductance connection to the circuit board ground plane. |
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