LTC1064-4CSW#PBF中文资料

1210644fbPARAMETERCONDITIONSMINTYP MAX UNITS Passband Gain Referenced to 0dB, 1Hz to 0.05f CUTOFF ●–0.50.1dB Gain TempCo0.0002dB/°C Passband Edge Frequency, f C 20 ± 1%kHz Gain at f CReferenced to Passband Gain, f C = 20kHz ●–0.40.7dB –3dB Frequency 50:1 (Cauer Response)21.5kHz 100:1 (Transitional Response)10kHz Passband Ripple (Note 2)0.1f C to 0.95f C Referenced to Passband Gain ●–0.150.6dB Stopband Attenuation At 1.7f CUTOFF ●–56–60dB Stopband Attenuation At 2f CUTOFF –80dB Input Frequency Range 50:1, Pin 10 at V +0f CLK kHz 100:1, Pin 10 at V –0f CLK /2kHz Output Voltage Swing and V S = ±2.37V ●±1.1V Operating Input Voltage Range V S = ±5V ●±3.1V V S = ±7.5V●±5.0VTotal Harmonic Distortion V S = ±5V, Input = 1V RMS at 1kHz 0.015%V S = ±7.5V, Input = 3V RMS at 1kHz 0.03%Wideband NoiseV S = ±5V, Input = GND 1Hz to 999kHz 120µV RMS V S = ±7.5V, Input = GND 1Hz to 999kHz135µV RMS(Note 1)Total Supply Voltage (V + to V –)............................16.5V Input Voltage at Any Pin......V – –0.3V ≤ V IN ≤ V + +0.3V Power Dissipation..............................................400mW Storage Temperature Range.................–65°C to 150°CLead Temperature (Soldering, 10 sec)..................300°C Operating Temperature RangeLTC1064-4M (OBSOLETE)...............–55°C to 125°C LTC1064-4C .......................................–40°C to 85°CThe ● denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at T A = 25°C. V S = ±7.5V, 50:1, f CLK = 1MHz, f C = 20kHz, R1 = 10k, TTL clock input level unless otherwise specified.ELECTRICAL CHARACTERISTICSABSOLUTE AXI U RATI GSW W WU3410644fbPower Supply Current vs Power Supply VoltageTable 1. Wideband Noise (µV RMS ). Input Grounded, f CLK = 1MHzGain vs Frequency with CompensationDevice to Device Phase MatchingTotal Harmonic DistortionFREQUENCY (Hz)10kG A I N (d B )50–5–10–15–20–25–30–35100k1M1064-4 G04INPUT LEVEL (V RMS )0.01D I S T O R T I O N (%)0.11.01064-4 G06FREQUENCY (kHz)6P H A S E M A T C H(±D E G )5.55.04.54.03.53.02.52.01.51.00.50101214161820221064-4 G05248Transient Responsef CLK = 1MHz, Ratio = 50:1,f C = 20kHz, V S = ±7.5V, 1kHz Square Wave InputTOTAL POWER SUPPLY VOLTAGE (V)02610141822P O W E R S U P P L Y C U RR E N T (m A )484440363228242016128404812161064-4 G0720242V /D I V0.1ms/DIVV S = ±2.37VV S = ±5V V S = ±7.5V Noise Noise Noise Pin 10 tof CLK /f CUTOFFµV RMS µV RMS µV RMS V +50:1120135145V –100:1100120130TYPICAL PERFOR A CE CHARACTERISTICSU W510644fbTable 2. Gain/Phase, Pin 10 at V +, Typical Responsef CUTOFF = 1kHz, V S = ±5V, T A = 25°C, f CLK = 50kHz, Ratio = 50:1Table 3. Gain/Delay, Pin 10 at V +, Typical Responsef CUTOFF = 1kHz, V S = ±5V, T A = 25°C, f CLK = 50kHz, Ratio = 50:1FREQUENCY(kHz)GAIN (dB)PHASE (deg)0.200–0.075–59.9900.400–0.050–122.4000.6000.020169.3000.8000.06088.5001.0000.090–26.1001.200–15.640–175.1001.400–34.700126.5001.600–51.70087.6001.800–68.60038.4002.000–84.110–47.860FREQUENCY(kHz)GAIN (dB)DELAY (ms)0.200–0.0740.8440.300–0.0700.8670.400–0.0500.8990.500–0.0200.9490.6000.020 1.0210.7000.050 1.1220.8000.060 1.2750.9000.120 1.5921.0000.090 2.1601.100–5.020 2.0701.200–15.6501.288Table 4. Gain/Phase, Pin 10 at V –, Typical Responsef –3dB = 1kHz, V S = ±5V, T A = 25°C, f CLK = 100kHz, Ratio = 100:1FREQUENCY(kHz)GAIN (dB)PHASE (deg)0.200–0.179–60.0900.400–0.440–122.0000.600–0.810170.8000.800–1.48091.9001.000–3.500–16.3001.200–17.720–140.5001.400–35.700164.8001.600–52.700135.0001.800–71.900114.0002.000–96.160–49.670Table 5. Gain/Delay, Pin 10 at V –, Typical Responsef –3dB = 1kHz, V S = ±5V, T A = 25°C, f CLK = 100kHz, Ratio = 100:1Table 6. Gain/Phase, Pin 10 at GND V S = ±5V, T A = 25°CFREQUENCY(kHz)GAIN (dB)PHASE (deg)0.200–0.383–47.1400.400–1.000–92.0000.600–1.300–134.3000.800–0.280–178.8001.000 2.670109.2001.200–3.500 6.0001.400k –12.510–47.4001.600–20.000–88.8001.800–27.300–127.8002.000–35.000–164.200FREQUENCY(kHz)GAIN (dB)DELAY (ms)0.200–0.1740.8420.300–0.3000.8610.400–0.4400.8880.500–0.6100.9330.600–0.8100.9990.700–1.090 1.0950.800–1.480 1.2420.900–2.080 1.5031.000–3.500 1.8321.100–8.720 1.7241.200–17.7201.183TYPICAL PERFOR A CE CHARACTERISTICSU W610644fbTYPICAL PERFOR A CE CHARACTERISTICSU WFREQUENCY (kHz)GAIN (dB)PHASE (deg)10.000–0.094–75.90012.000–0.100–91.40014.000–0.090–107.20016.000–0.080–123.30018.000–0.060–139.60020.000–0.040–156.50022.000–0.020–173.80024.0000.000168.20026.0000.020149.40028.0000.030130.00030.0000.020109.40032.0000.01087.70034.000–0.02064.60036.000–0.03039.50038.000–0.01011.40040.000–0.070–22.00042.000–0.920–64.10044.000–4.000–110.10046.000–8.970–147.00048.000–14.320–173.50050.000–19.460166.800FREQUENCY (kHz)GAIN (dB)PHASE (deg)10.000–0.096–32.39020.000–0.100–64.90030.000–0.080–98.10040.000–0.040–132.30050.0000.020–168.20060.0000.070153.60070.0000.040112.10080.000–0.12066.40090.000–0.46014.600100.000–1.310–49.300110.000–5.640–129.000120.000–14.530167.800130.000–23.800126.700140.000–32.60096.200150.000–41.00071.300160.000–49.20049.200170.000–57.50029.000180.000–66.5009.800190.000–77.770–2.320200.000–92.05076.740FREQUENCY (kHz)GAIN (dB)PHASE (deg)110.000–7.420172.100120.000–18.240119.400130.000–28.00083.300140.000–37.00054.000150.000–45.700–27.600160.000–54.300 2.100170.000–63.300–24.900180.000–73.610–60.210190.000–85.300–138.990200.000–83.390129.580Table 7. Gain/Phase for Figure 6.Typical Response, Pin 10 at V +, f CUTOFF = 40kHz,V S = ±7.5V, f CLK = 2MHz, Ratio = 50:1Table 8. Gain/Phase for Figure 7.Typical Response, Pin 10 at V +, f CUTOFF = 100kHz,V S = ±7.5V, T A = 25°C, f CLK = 5MHz, Ratio = 50:1Table 9. Gain/Phase for Figure 7.Typical Response, Pin 10 at V + f CUTOFF = 100kHz,V S = ±7.5V, T A = 125°C, f CLK = 5MHz, Ratio = 50:1FREQUENCY (kHz)GAIN (dB)PHASE (deg)10.000–0.071–33.80020.000–0.040–67.80030.0000.050–102.50040.0000.190–138.30050.0000.410–176.10060.0000.670143.10070.0000.92098.40080.000 1.15048.20090.000 1.530–10.900100.0001.110–96.500UUUPI FU CTIO SINV C, COMP1, INV A, COMP2 (Pins 1, 6, 7 and 13): To obtain a Cauer response with minimum passband ripple and cutoff frequencies above 20kHz, compensating com-ponents are required. Figure 6 uses ±7.5V power supplies and compensation components to achieve up to 40kHz sweepable cutoff frequencies and ±0.1dB passband ripple. Table 7 lists the typical amplitude response of Figure 6. Figure 7 illustrates the compensation scheme required to obtain a 100kHz cutoff frequency; Graph 4 and Tables 8 and 9 list the typical response of Figure 7 for 25°C and 125°C ambient temperature. As shown the ripple in-creases at high temperatures but still a ±0.25dB figure can be obtained for ambient temperatures below 70°C. V IN, V OUT (Pins 2, 9): The input Pin 2 is connected to a 12k resistor tied to the inverting input of an op amp. Pin2 is protected against static discharge. The device’s output, Pin 9, is the output of an op amp which can typically source/sink 3mA/1mA. Although the internal op amps are unity gain stable, driving long coax cables is not recom-mended.When testing the device for noise and distortion, the output, Pin 9, should be buffered (Figure 4). The op amp power supply wire (or trace) should be connected directly to the power source.To eliminate any output clock feedthrough, Pin 9 should be buffered with a simple R, C lowpass filter (Figure 5). The cutoff frequency of the output filter should be f CLK/3.AGND (Pins 3, 5): For dual supply operation these pins should be connected to a ground plane. For single supply operation both pins should be tied to one half supply (Figure 2).V+, V– (Pins 4, 12): Should be bypassed with a 0.1µF capacitor to an adequate analog ground. Low noise, nonswitching power supplies are recommended. To avoid latchup when the power supplies exhibit high turn-on transients, a 1N5817 Schottky diode should be added from the V+ and V– pins to ground (Figures 1 and 2). INV A, R(h, I) (Pins 7, 14):A very short connection between Pin 7 and Pin 14 is recommended. This connec-tion should be preferably done under the IC package. In a breadboard, use a one inch, or less, shielded coaxial cable; the shield should be grounded. In a PC board, use a one inch trace or less; surround the trace by a ground plane. NC (Pin 8 ): Pin 8 is not internally connected, it should be preferably grounded.50/100 Ratio (Pin 10):F or an f CLK/f C ratio of 50:1, Pin 10 should be tied to V+. For an f CLK/f–3dB ratio of 100:1, Pin 10 should be tied to V–. When Pin 10 is at midsupplies (i.e. ground), the filter response is neither Cauer nor transitional. Table 6 illustrates this response. Bypassing Pin 10 with a 0.1µF capacitor reduces the already small clock feedthrough.(Pin Numbers Refer to the 14-Pin Package)710644fb810644fbFigure 3. Level Shifting the Input T 2L Clock for Single Supply Operation ≥6V.Figure 4. Buffering the Filter Output. The Buffer Op Amp Should Not Share the LTC1064-4 Power Lines.Figure 5. Adding an Output Buffer-Filter to Eliminate Any Clock Feedthrough.Passband Error of Output Buffer is ±0.1dB to 50kHz, –3dB at 94kHz.V 1064-4 F030.1µ2LV INV 0.1µOUTµFV Figure 1. Using Schottky Diodes to Protectthe IC from Power Supply SpikesFigure 2. Single Supply Operation. If Fast Power Up or DownTransients are Expected, Use a 1N5817 Schottky Diode Between Pin 4 and Pin 5.V V –µFV +TYPICAL APPLICATIO SU91010644fbN Package14-Lead PDIP (Narrow 0.300)(LTC DWG # 05-08-1510)UPACKAGE DESCRIPTIO*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)11Information furnished by Linear Technology Corporation is believed to be accurate and reliable.However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.LTC1064-41210644fbLinear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417(408) 432-1900 ● FAX: (408) 434-0507 ● LINEAR TECHNOLOGY CORPORA TION 1991LW/TP 1202 1K REV B • PRINTED IN USAFigure 6. Compensating LTC1064-4 for PassbandRipple of ±0.1dB and f CUTOFF Sweeps to 40kHz.–7.5VµF–7.5VµFFigure 7. Compensating LTC1064-4 for f CUTOFF = 100kHz,Gain at f CUTOFF = –1.3dB, Table 8.TYPICAL APPLICATIO SUPART NUMBER DESCRIPTIONCOMMENTSLTC1069-18th Order Elliptic LowpassS0-8 Package, Low Power LTC1069-6Single Supply, 8th Order Elliptic Lowpass S0-8 Package, Very Low PowerLTC1569-6DC Accurate, 10th Order Lowpass Internal Precision Clock, Low Power, S0-8 Package LTC1569-7DC Accurate, 10th Order LowpassInternal Precision Clock, Delay Equalized, S0-8 PackageRELATED PARTS。