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AD9553BCPZ Datasheet(PDF) 4 Page - Analog Devices |
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AD9553BCPZ Datasheet(HTML) 4 Page - Analog Devices |
4 / 44 page AD9553 Rev. 0 | Page 4 of 44 RESET PIN Table 4. Parameter Min Typ Max Unit Test Conditions/Comments INPUT CHARACTERISTICS1 Input Voltage High, VIH 1.96 V Input Voltage Low, VIL 0.85 V Input Current High, IINH 0.3 12.5 μA Input Current Low, IINL 31 43 μA MINIMUM PULSE WIDTH LOW 150 μs Tested with an active source driving the RESET pin. 1 The RESET pin has a 100 kΩ internal pull-up resistor. REFERENCE CLOCK INPUT CHARACTERISTICS Table 5. Parameter Min Typ Max Unit Test Conditions/Comments DIFFERENTIAL INPUT Input Frequency Range 0.008 250 MHz 710 MHz Assumes minimum LVDS input level and requires bypassing of the /5 divider and 2× multiplier. Common-Mode Internally Generated Input Voltage 613 692 769 mV Use ac coupling to preserve the internal dc bias of the differential input. Differential Input Voltage Sensitivity 250 mV p-p Capacitive coupling required; can accommodate single- ended input by ac grounding unused input; the instantaneous voltage on either pin must not exceed the 3.3 V dc supply rails. Differential Input Resistance 5 kΩ Differential Input Capacitance 3 pF Duty Cycle Pulse width high and pulse width low establish the bounds for duty cycle. Pulse Width Low 1.6 ns Up to 250 MHz. Pulse Width High 1.6 ns Up to 250 MHz. Pulse Width Low 0.64 ns Beyond 250 MHz, up to 710 MHz. Pulse Width High 0.64 ns Beyond 250 MHz, up to 710 MHz. CMOS SINGLE-ENDED INPUT Input Frequency Range 0.008 200 MHz Input High Voltage1 1.05 V Input Low Voltage1 0.98 V Input High Current 0.04 μA Input Low Current 0.03 μA Input Capacitance 3 pF Duty Cycle Pulse width high and pulse width low establish the bounds for duty cycle. Pulse Width Low 2 ns Pulse Width High 2 ns 2× FREQUENCY MULTIPLIER 125 MHz To avoid excessive reference spurs, the 2× multiplier requires 48% to 52% duty cycle. Reference clock input frequencies greater than 125 MHz require the use of the /5 divider. 1The single-ended CMOS input is 3.3 V compatible. In the case of ac-coupling, the user must bias the input at 1.0 V dc. |
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