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LTC1164-7CS Datasheet(PDF) 3 Page - Linear Technology |
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LTC1164-7CS Datasheet(HTML) 3 Page - Linear Technology |
3 / 12 page 3 LTC1164-7 ELECTRICAL C C HARA TERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS Group Delay (td)(fCLK/fC) = 50:1, f ≥ fCUTOFF 151.0 ± 1 µs td = (1/360)(f/fC)(fCLK/fC) = 100:1, f ≥ fCUTOFF 297.2 ± 1 µs (Note 2) (fCLK/fC) = 50:1, f ≥ fCUTOFF q 149.3 153.5 µs (fCLK/fC) = 100:1, f ≥ fCUTOFF q 293.8 301.4 µs Group Delay Deviation (fCLK/fC) = 50:1, f ≥ fCUTOFF ±1.0 % (Note 2) (fCLK/fC) = 100:1, f ≥ fCUTOFF ±1.0 % (fCLK/fC) = 50:1, f ≥ fCUTOFF q ±2.0 % (fCLK/fC) = 100:1, f ≥ fCUTOFF q ±2.5 % Input Frequency Range (Table 9) (fCLK/fC) = 50:1 <fCLK kHz (fCLK/fC) = 100:1 <fCLK/2 kHz Maximum fCLK VS = Single 5V (Pins 3 and 5 at 2V) 1 MHz VS = ±5V 1 MHz VS = ±7.5V 1 MHz Clock Feedthrough (f = fCLK) 50:1, ±5V, Input at GND 100 µVRMS Wideband Noise VS = ±2.5V 95 ± 5% µVRMS (1Hz ≤ f < fCLK)VS = ±5V 105 ± 5% µVRMS VS = ±7.5V 115 ± 5% µVRMS Input Impedance 35 55 90 k Ω Output DC Voltage Swing (Note 4) VS = ±2.375V ±1.25 ±1.4 V VS = ±5V q ±3.70 ±3.9 V VS = ±7.5V q ±5.40 ±6.1 V Output DC Offset 50:1, VS = ±5V ±100 ±220 mV 100:1, VS = ±5V ±100 mV Output DC Offset TempCo 50:1, VS = ±5V ±200 µV/°C 100:1, VS = ±5V ±200 µV/°C Power Supply Current VS = ±2.375V, TA = 25°C 2.5 4.0 mA q 4.5 mA VS = ±5V, TA = 25°C 4.5 7.0 mA q 8.0 mA VS = ±7.5V, TA = 25°C 7.0 11.0 mA q 12.5 mA Power Supply Range ±2.375 ±8V The q denotes specifications which apply over the full operating temperature range. Note 1: Input frequencies, f, are linearly phase shifted through the filter as long as f ≤ fC; fC = cutoff frequency. Figure 1 curve shows the typical phase response of an LTC1164-7 operating at fCLK = 400kHz, fC = 8kHz and it closely matches an ideal straight line. The phase shift is described by: phase shift = 180 ° – F (f/fC); f ≤ fC. F is arbitrarily called the “phase factor” expressed in degrees. The phase factor together with the specified deviation from the ideal straight line allows the calculation of the phase at a given frequency. Example: The phase shift at 7kHz of the LTC1164-7 shown in Figure 1 is: phase shift = 180 ° – 434° (7kHz/10kHz) ± nonlinearity = –123.8 ° ± 1% or –123.9°± 1.24°. Note 2: Group delay and group delay deviation are calculated from the measured phase factor and phase deviation specifications. Note 3: The filter cutoff frequency is abbreviated as fCUTOFF or fC. Note 4: The AC swing is typically 11VP-P, 7VP-P, 2.8VP-P for ±7.5V, ± 5V, ± 2.5V supply respectively. For more information refer to the THD + Noise vs Input graphs. VS = ±7.5V, RL = 10k, TA = 25°C, fCUTOFF = 8kHz or 4kHz, fCLK = 400kHz, TTL or CMOS level and all gain measurements are referenced to passband gain, unless otherwise specified. (Maximum clock rise or fall time ≤ 1µs) Figure 1. Phase Response in the Passband (Note 1) FREQUENCY (kHz) 0 –360 –270 –180 –90 0 90 180 246 8 1164-7 F01 10 13 57 9 fCLK = 500kHz (fCLK/fC) = 50:1 |
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