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LTC1668 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1668 Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page 3 LTC1668 The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDD = 5V, VSS = – 5V, LADCOM = AGND = DGND = 0V, IOUTFS = 10mA. Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Reference Input Reference Small-Signal Bandwidth IFS = 10mA, CCOMP1 = 0.1µF20 kHz Power Supply VDD Positive Supply Voltage q 4.75 5 5.25 V VSS Negative Supply Voltage q – 4.75 – 5 – 5.25 V IDD Positive Supply Current IFS = 10mA, fCLK = 25Msps, fOUT = 1MHz q 35 mA ISS Negative Supply Current IFS = 10mA, fCLK = 25Msps, fOUT = 1MHz q 33 40 mA PDIS Power Dissipation IFS = 10mA, fCLK = 25Msps, fOUT = 1MHz q 180 mW IFS = 1mA, fCLK = 25Msps, fOUT = 1MHz q 85 mW Dynamic Performance (Differential Transformer Coupled Output, 50 Ω Double Terminated, Unless Otherwise Noted) fCLOCK Maximum Update Rate q 50 75 Msps tS Output Settling Time To 0.1% FSR 30 ns tPD Output Propagation Delay 8ns Glitch Impulse Single Ended 15 pV-s Differential 5 pV-s tr Output Rise Time 4ns tf Output Fall Time 4ns iNO Output Noise IFS = 10mA 50 pA/ √Hz IFS = 1mA 30 pA/ √Hz AC Linearity SFDR Spurious Free Dynamic Range fCLK = 25Msps, fOUT = 1MHz to Nyquist 0dB FS Output 78 87 dB – 6dB FS Output 87 dB –12dB FS Output 86 dB –18dB FS Output 80 dB fCLK = 50Msps, fOUT = 1MHz 84 dB fCLK = 50Msps, fOUT = 2.5MHz 80 dB fCLK = 50Msps, fOUT = 5MHz 77 dB fCLK = 50Msps, fOUT = 20MHz 65 dB Spurious Free Dynamic Range fCLK = 25Msps, fOUT = 1MHz, 2MHz Span 86 96 dB Within a Window fCLK = 50Msps, fOUT = 5MHz, 4MHz Span 88 dB THD Total Harmonic Distortion fCLK = 25Msps, fOUT = 1MHz –84 –77 dB fCLK = 50Msps, fOUT = 5MHz –76 dB Digital Inputs VIH Digital High Input Voltage q 2.4 V VIL Digital Low Input Voltage q 0.8 V IIN Digital Input Current q ±10 µA CIN Digital Input Capacitance 5pF tDS Input Setup Time q 8ns tDH Input Hold Time q 4ns tCLKH Clock High Time q 5ns tCLKL Clock Low Time q 8ns |
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