LTC1264-7CSW#TRMPBF Linear Technology, LTC1264-7CSW#TRMPBF Datasheet
LTC1264-7CSW#TRMPBF
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LTC1264-7CSW#TRMPBF Summary of contents
Page 1
... Bessel), while at three times the cutoff frequency, the filter attains 55dB attenuation (vs 30dB for Bessel). The cutoff frequency of the LTC1264-7 is tuned via an external TTL or CMOS clock. The clock-to-cutoff frequency ratio of the LTC1264-7 can be set to 25:1 (pin + 50:1 (pin clock-to-cutoff frequency ratio of 25:1, the input is double-sampled to lower the risk of aliasing ...
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... Gain with f = 20kHz CLK = ±2.375V Gain with f = 400kHz, V CLK S Gain with f = 4MHz CLK (Note 1) Operating Temperature Range LTC1264-7C ...................................... – 40°C to 85°C LTC1264-7M (OBSOLETE) .............. – 55°C to 125°C ≤ Lead Temperature (Soldering, 10 sec)................. 300°C + 0.3V ORDER PART NUMBER NC 1 LTC1264-7CN GND ...
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... ±7. ±5V 25: ±5V 50: ±5V 25: ±5V 50: ±2.375V ± ±7. LTC1264-7 = 100kHz or 50kHz 2.5MHz, TTL or CLK MIN TYP MAX 407 ± 2 388 ± 2 ● 392 423 ● 374 414 ±1.0 ±1.0 ± 2.0 ● ± 2.0 ● 11.3 21.6 ● 10.9 11.7 ● ...
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... Note 2: Input frequencies, f, are linearly phase shifted through the filter as long as f ≤ cutoff frequency Figure 1 curve (A) shows the typical phase response of an LTC1264-7 operating 2.5MHz 100kHz. An endpoint straight line, curve CLK C (B), depicts the ideal linear phase response of the filter described by: ) ...
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... GAIN 0 –1 –45 –2 –90 –3 PHASE –135 –4 –180 –5 –225 –6 –270 – 100 110 1264-7 G06 LTC1264-7 Phase Factor vs f CLK (Typical Unit) 450 = ±7. 440 ( 50:1 CLK C 70°C 430 420 410 400 0°C 390 380 370 ...
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... LTC1264 TYPICAL PERFOR A Passband Gain vs f CLK 5 = ±7. 1MHz S CLK 25 2MHz CLK C CLK T = 25° 3MHz A 3 CLK 4MHz CLK 5MHz CLK 1 0 –1 – – 3 –4 –5 10 100 1000 FREQUENCY (kHz) 1264-7 G08 Passband Gain 85°C CLK 5 = ± 1MHz S CLK ...
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... CLK ( 25:1 CLK C –55 AGND = 2V (5 REPRESENTA- –60 TIVE UNITS) –65 –70 –75 –80 –85 –90 100 1 10 FREQUENCY (kHz) LTC1264-7 Maximum Passband vs Temperature 1.0 0.5 0 – 0.5 –1 70°C –1 –40°C A –2.0 –2 SINGLE 5V S –3 2MHz ...
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... LTC1264 TYPICAL PERFOR A THD + Noise vs Input – PIN 3 AT 2.5V –45 B. PIN –50 –55 –60 –65 –70 –75 – SINGLE 500kHz CLK – 1kHz IN –90 50m 0.1 INPUT AMPLITUDE (V ) RMS 1264-7 G26 Table 1. Passband Gain and Phase = ±7.5V 25: 25°C S CLK ...
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... Unit) CLK 0.000 180.00 10.000 75.03 20.000 – 31.15 30.000 – 137.86 40.000 – 244.58 LTC1264 50: 25°C CLK C A GAIN (dB) PHASE (DEG) 0.032 0.032 – 0.249 – 1.135 – 105.20 – 3.225 – 199.22 ...
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... LTC1264-7 CLOCK SOURCE GND 7 8 DIGITAL SUPPLY V OUT /f = 25:1 CLK CUTOFF 200Ω LTC1264-7 CLOCK SOURCE GND 7 8 DIGITAL SUPPLY + 1µF V OUT /f CLK CUTOFF – LT1220 1k + 1264-7 F04 Figure 4. Buffer for Filter Output + 1264-7 F02 + 1264-7 F03 = 25:1 12647fa ...
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... Table 7. Clock Source High and Low Threshold Levels POWER SUPPLY Dual Supply = ±7.5V Dual Supply = ±5V Dual Supply = ± 2.5V Single Supply = 12V Single Supply = 5V LTC1264-7 HIGH LEVEL LOW LEVEL ≥ 2.18V ≤ 0.5V ≥ 1.45V ≤ 0.5V ≥ 0.73V ≤ ...
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... Most of its frequency contents lie within the filter passband and it cannot be reduced with post filtering. For instance, the 50:1 LTC1264-7 wideband noise at ±5V supply is 160µV 100µV RMS 145µV RMS 400µ ...
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... RMS IN CLK ≥ 500kHz) 0.7V (f If, for instance, an LTC1264-7 operating with a 100kHz RMS IN ≥ 400kHz) 0.5V (f RMS IN clock and 2kHz cutoff frequency receives a 95kHz 10mV input signal, a 5kHz 56µV output. When the LTC1264-7 operates with a clock-to- cutoff frequency of 25:1, aliasing occurs at twice the clock frequency ...
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... LTC1264-7 PACKAGE DESCRIPTION .300 BSC (7.62 BSC) .008 – .018 (0.203 – 0.457) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS Package 14-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) .785 (19.939) .005 MAX (0.127) MIN .025 (0.635) ...
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... PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510 0.255 ± 005 (6.477 ± 0.381 0.015 (0.380) 0.130 ± 0.005 MIN (3.302 ± 0.127) 0.005 ( 0.125) INCHES MILLIMETERS LTC1264-7 0.770* (19.558) MAX 0.065 (1.651) 0.045 – 0.065 TYP (1.143 – 1.651) 0.018 ± 0.003 0.120 (0.457 ± ...
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... LTC1264-7 U TYPICAL APPLICATION .030 ±.005 TYP N .420 MIN RECOMMENDED SOLDER PAD LAYOUT .291 – .299 (7.391 – 7.595) NOTE 4 .010 – .029 (0.254 – 0.737) .005 (0.127) RAD MIN .009 – .013 NOTE 3 (0.229 – 0.330) .016 – .050 (0.406 – 1.270) ...