LTC1069-1CS8#PBF

LTC1069-1 Low Power, 8th Order Progressive Elliptic, Lowpass Filter DESCRIPTION FEATURES n n n n n n n n n n 8th Order Elliptic Filter in SO-8 Package Operates from Single 3.3V to ±5V Power Supplies –20dB at 1.2fCUTOFF –52dB at 1.4fCUTOFF –70dB at 2fCUTOFF Wide Dynamic Range 110μVRMS Wideband Noise 3.8mA Supply Current with ±5V Supplies 2.5mA Supply Current with Single 5V Supply 2mA Supply Current with Single 3.3V Supply APPLICATIONS n n The LTC®1069-1 is a monolithic 8th order lowpass filter featuring clock-tunable cutoff frequency and 2.5mA power supply current with a single 5V supply. An additional feature of the LTC1069-1 is operation with a single 3.3V supply. The cutoff frequency (fCUTOFF) of the LTC1069-1 is equal to the clock frequency divided by 100. The gain at fCUTOFF is –0.7dB and the typical passband ripple is ±0.15dB up to 0.9fCUTOFF. The stopband attenuation of the LTC1069-1 features a progressive elliptic response reaching 20dB attenuation at 1.2fCUTOFF, 52dB attenuation at 1.4fCUTOFF and 70dB attenuation at 2fCUTOFF. With ±5V supplies, the LTC1069-1 cutoff frequency can be clock-tuned up to 12kHz; with a single 5V supply, the maximum cutoff frequency is 8kHz. Telecommunication Filters Antialiasing Filters L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. The low power feature of the LTC1069-1 does not penalize the device’s dynamic range. With ±5V supplies and an input range of 0.3VRMS to 2.5VRMS, the signal-to-(noise + THD) ratio is ≥70dB. The wideband noise of the LTC1069-1 is 110μVRMS. Other filter responses with lower power or higher speed can be obtained. Please contact LTC marketing for details. The LTC1069-1 is available in 8-pin PDIP and 8-pin SO packages. TYPICAL APPLICATION Frequency Response 10 Single 3.3V Supply 3kHz Elliptic Lowpass Filter 0 –10 + AGND 0.47μF 3.3V 0.1μF VOUT VOUT VIN VIN CLK –20 GAIN (dB) V– V+ LTC1069-1 NC NC fCLK 300kHz 1069-1 TA01 –30 –40 –50 –60 –70 –80 1.5 3 6 4.5 FREQUENCY (kHz) 7.5 10691 TA02 10691fa 1 LTC1069-1 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ to V–) .................................12V Maximum Voltage at Any Pin .............................(V– – 0.3V) ≤ V ≤ (V+ + 0.3V) Operating Temperature Range LTC1069C-1 ............................................. 0°C to 70°C LTC1069I-1 .......................................... –40°C to 85°C Storage Temperature Range................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C PIN CONFIGURATION TOP VIEW TOP VIEW 8 VOUT AGND 1 8 VOUT 2 7 V– V+ 2 7 V– NC 3 6 NC NC 3 6 NC VIN 4 5 CLK VIN 4 5 CLK AGND 1 V + S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 125°C, θJA = 130°C/W N8 PACKAGE 8-LEAD PLASTIC DIP TJMAX = 110°C, θJA = 100°C/W ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC1069-1CN8#PBF LTC1069-1 8-Lead Plastic DIP 0°C to 70°C LTC1069-1IN8#PBF LTC1069-1 8-Lead Plastic DIP –40°C to 85°C LTC1069-1CS8#PBF LTC1069-1CS8#TRPBF 10691 8-Lead Plastic SO 0°C to 70°C LTC1069-1IS8#PBF LTC1069-1IS8#TRPBF 10691I 8-Lead Plastic SO –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/100. The fCLK signal level is TTL or CMOS (clock rise or fall time ≤ 1μs), VS = 3.3V to ±5V, RL = 10k, unless otherwise noted. All AC gains are measured relative to the passband gain. PARAMETER CONDITIONS Passband Gain (fIN ≤ 0.25fCUTOFF) VS = ±5V, fCLK = 500kHz fTEST = 1.25kHz, VIN = 1VRMS VS = 3.3V, fCLK = 200kHz fTEST = 0.5kHz, VIN = 0.5VRMS MIN TYP MAX UNITS l –0.30 –0.35 0.2 0.70 0.75 dB dB l –0.30 –0.35 0.2 0.70 0.75 dB dB 10691fa 2 LTC1069-1 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. fCUTOFF is the filter’s cutoff frequency and is equal to fCLK/100. The fCLK signal level is TTL or CMOS (clock rise or fall time ≤ 1μs), VS = 3.3V to ±5V, RL = 10k, unless otherwise noted. All AC gains are measured relative to the passband gain. PARAMETER CONDITIONS MIN TYP MAX UNITS Gain at 0.50fCUTOFF VS = ±5V, fCLK = 500kHz fTEST = 2.5kHz, VIN = 1VRMS l –0.10 –0.11 –0.03 0.10 0.11 dB dB VS = 3.3V, fCLK = 200kHz fTEST = 1kHz, VIN = 0.5VRMS l –0.10 –0.11 –0.03 0.10 0.11 dB dB VS = ±5V, fCLK = 500kHz fTEST = 3.75kHz, VIN = 1VRMS l –0.20 –0.25 0.04 0.20 0.25 dB dB VS = 3.3V, fCLK = 200kHz fTEST = 1.5kHz, VIN = 0.5VRMS l –0.20 –0.25 0.04 0.20 0.25 dB dB VS = ±5V, fCLK = 500kHz fTEST = 4.5kHz, VIN = 1VRMS l –0.20 –0.25 –0.01 0.20 0.25 dB dB VS = 3.3V, fCLK = 200kHz fTEST = 1.8kHz, VIN = 0.5VRMS l –0.20 –0.25 –0.01 0.20 0.25 dB dB VS = ±5V, fCLK = 500kHz fTEST = 4.75kHz, VIN = 1VRMS l –0.30 –0.35 –0.05 0.30 0.35 dB dB VS = 3.3V, fCLK = 200kHz fTEST = 1.9kHz, VIN = 0.5VRMS l –0.30 –0.35 –0.04 0.30 0.35 dB dB VS = ±5V, fCLK = 500kHz fTEST = 5.0kHz, VIN = 1VRMS l –1.25 –1.35 –0.70 –0.25 –0.15 dB dB VS = 3.3V, fCLK = 200kHz fTEST = 2.0kHz, VIN = 0.5VRMS l –1.25 –1.35 –0.61 –0.25 –0.15 dB dB VS = ±5V, fCLK = 500kHz fTEST = 6.25kHz, VIN = 1VRMS l –30 –31 –27 –25 –24 dB dB VS = 3.3V, fCLK = 200kHz fTEST = 2.5kHz, VIN = 0.5VRMS l –30 –31 –27 –25 –24 dB dB VS = ±5V, fCLK = 500kHz fTEST = 7.5kHz, VIN = 1VRMS l –58 –59 –53 –50 –49 dB dB VS = 3.3V, fCLK = 200kHz fTEST = 3kHz, VIN = 0.5VRMS l –58 –59 –53 –50 –49 dB dB 30 20 15 150 100 mV mV mV ±4.0 ±1.7 ±0.9 3.25 1.25 0.60 V V V 3.8 2.5 2.0 5.5 4.5 3.5 mA mA mA Gain at 0.75fCUTOFF Gain at 0.90fCUTOFF Gain at 0.95fCUTOFF Gain at fCUTOFF Gain at 1.25fCUTOFF Gain at 1.50fCUTOFF Output DC Offset (Input at AGND) VS = ±5V, fCLK = 500kHz VS = 4.75V, fCLK = 400kHz VS = 3.3V, fCLK = 200kHz Output Voltage Swing VS = ±5V VS = 4.75V VS = 3.3V l l l Power Supply Current VS = ±5V, fCLK = 500kHz VS = 4.75V, fCLK = 400kHz VS = 3.3V, fCLK = 200kHz l l l Maximum Clock Frequency VS = ±5V VS = 4.75V VS = 3.3V –3.25 –1.50 –0.70 1.2 0.8 0.5 Input Frequency Range 0 Input Resistance 30 Operating Power Supply Voltage ±1.57 43 MHz MHz MHz fCLK/2 MHz 70 kΩ ±5.5 V Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. 10691fa 3 LTC1069-1 TYPICAL PERFORMANCE CHARACTERISTICS Transition Band Gain vs Frequency Passband Gain vs Frequency 1.0 VS = ±5V fCLK = 500kHz fC = 5kHz VIN = 2VRMS 0.6 –70 VS = ±5V fCLK = 500kHz fC = 5kHz VIN = 2VRMS 0 –10 –20 0.2 –30 GAIN (DB) 0.4 0 –0.2 –76 –40 –50 –80 –82 –84 –0.6 –70 –86 –0.8 –80 –88 –1.0 –90 5 6 7 8 9 FREQUENCY (kHz) 10 10691 G03 Passband Gain vs Clock Frequency, VS = ±5V 2.0 VS = SINGLE 3.3V VIN = 0.5VRMS 1.5 1.0 1.0 fCLK = 750kHz fC = 7.5kHz GAIN (dB) 0.5 2.0 VS = SINGLE 5V VIN = 1.2VRMS 0 –0.5 0 –0.5 fCLK = 500kHz fC = 5kHz –1.0 –2.0 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 FREQUENCY (kHz) 0.5 0 fCLK = 500kHz fC = 5kHz –0.5 fCLK = 500kHz fC = 5kHz –1.0 –1.5 fCLK = 1.5MHz fC = 15kHz 1.0 fCLK = 1MHz fC = 10kHz fCLK = 750kHz fC = 7.5kHz 0.5 VS = ±5V VIN = 2VRMS 1.5 GAIN (dB) 1.5 11 12 13 14 15 16 17 18 19 20 21 FREQUENCY (kHz) Passband Gain vs Clock Frequency, VS = Single 5V 2.0 –1.5 –1.5 –2.0 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 FREQUENCY (kHz) –2.0 1 3 5 7 9 13 15 10691 G06 Phase and Group Delay vs Frequency 10 11 FREQUENCY (kHz) 10691 G05 Gain vs Supply Voltage fCLK = 1MHz fC = 10kHz –1.0 10691 G04 Transient Response 0 fCLK = 500kHz VIN = 0.5VRMS 0 VS = SINGLE 5V fCLK = 500kHz fC = 5kHz –90 –10 PHASE 0.6 PHASE (DEG) –30 –40 –50 –60 –70 VS = 3.3V –80 VS = 5V 3 5 0.5 –360 0.4 –450 0.3 –540 0.1 –720 7 9 11 13 15 17 19 21 FREQUENCY (kHz) 10691 G07 0 0 1 2 1V/DIV 0.2 GROUP DELAY –630 VS = ±5V 1 –270 GROUP DELAY (ms) –180 –20 –90 –90 11 10691 G02 Passband Gain vs Clock Frequency, VS = Single 3.3V GAIN (dB) –78 –60 10691 G01 GAIN (dB) –74 –0.4 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 FREQUENCY (kHz) VS = ±5V fCLK = 500kHz fC = 5kHz VIN = 2VRMS –72 GAIN (dB) 0.8 GAIN (dB) Stopband Gain vs Frequency 10 3 4 5 6 7 FREQUENCY (kHz) 0.2ms/DIV VS = ±5V fCLK = 1MHz fIN = 500Hz 4VP-P SQUARE WAVE 10691 G09 10691 G08 10691fa 4 LTC1069-1 TYPICAL PERFORMANCE CHARACTERISTICS Dynamic Range THD + Noise vs VIN (VRMS) THD + Noise vs Frequency fCLK = 500kHz fIN = 1kHz –50 VS = 5V –55 –60 VS = ±5V VS = 3.3V –65 –40 fCLK = 500kHz VIN = 300mVRMS –62 THD + NOISE (dB) –45 THD + NOISE (dB) THD + Noise vs Frequency –60 –70 –75 –64 –50 –66 –55 –68 VS = ±5V –70 –72 VS = 3.3V –74 VS = 5V –70 –75 –80 –85 –78 –85 –80 1.0 2.0 5.0 2.67 0.65 1.22 INPUT VOLTAGE (VRMS) 10691 G10 0.3 1 2 3 INPUT FREQUENCY (kHz) 4 –90 5 VS = 3.3V VIN = 0.5VRMS –65 –76 VS = 5V VIN = 1VRMS VS = ±5V VIN = 2VRMS 1 2 3 INPUT FREQUENCY (kHz) 10691 G11 4 5 10691 G12 Supply Current vs Clock Frequency Supply Current vs Supply Voltage Output Voltage Swing vs Temperature 5 5 fCLK = 10Hz 5.0 25°C 3 85°C –40°C 2 4.5 VS = ±5V 4.0 3.5 3.0 2.5 1 4 OUTPUT VOLTAGE SWING (V) SUPPLY CURRENT (mA) 4 SUPPLY CURRENT (mA) –60 –80 –90 0.1 fCLK = 500kHz –45 THD + NOISE (dB) –40 VS = 5V VS = 3.3V 1 3 4 5 2 TOTAL SUPPLY VOLTAGE (±V) 6 10691 G13 VS = ±2.5V 2 1 VS = ±1.57V 0 VS = ±1.57V –1 –2 VS = ±2.5V –3 –4 2.0 0 0 VS = ±5V 3 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.2 CLOCK FREQUENCY (MHz) 10691 G14 –5 VS = ±5V –40 –20 0 20 40 60 AMBIENT TEMPERATURE (°C) 80 10691 G15 10691fa 5 LTC1069-1 PIN FUNCTIONS AGND (Pin 1): Analog Ground. The quality of the analog signal ground can affect the filter performance. For either single or dual supply operation, an analog ground plane surrounding the package is recommended. The analog ground plane should be connected to any digital ground at a single point. For dual supply operation Pin 1 should be connected to the analog ground plane. For single supply operation Pin 1 should be bypassed to the analog ground plane with a 0.47μF or larger capacitor. An internal resistive divider biases Pin 1 to 1/2 the total power supply. Pin 1 should be buffered if used to bias other ICs. Figure 1 shows the connections for single supply operation. V+, V– (Pins 2, 7): Power Supply Pins. The V+ (Pin 2) and the V– (Pin 7) should be bypassed with a 0.1μF capacitor to an adequate analog ground. The filter’s power supplies should be isolated from other digital or high voltage analog supplies. A low noise linear supply is recommended. Using switching power supplies will lower the signal-to-noise ratio of the filter. Unlike previous monolithic filters, the power supplies can be applied at any order, that is, the positive supply can be applied before the negative supply and vice versa. Figure 2 shows the connection for dual supply operation. NC (Pins 3, 6): No Connection. Pins 3 and 6 are not connected to any internal circuity; they should be preferably tied to ground. VIN (Pin 4): Filter Input Pin. The filter input pin is internally connected to the inverting input of an op amp through a 43k resistor. 1 0.47μF V+ 0.1μF VIN AGND 2 8 VOUT VIN Table 1. Clock Source High and Low Thresholds POWER SUPPLY HIGH LEVEL LOW LEVEL Dual Supply = ±5V 1.5V 0.5V Single Supply = 10V 6.5V 5.5V Single Supply = 5V 1.5V 0.5V Single Supply = 3.3V 1.2V 0.5V VOUT (Pin 8): Filter Output Pin. Pin 8 is the output of the filter and it can source or sink 1mA. Driving coaxial cables or resistive loads less than 20k will degrade the total harmonic distortion of the filter. When evaluating the device’s dynamic range, a buffer is required to isolate the filter’s output from coax cables and instruments. 1 VOUT 7 V– V+ LTC1069-1 3 6 NC NC 4 CLK (Pin 5): Clock Input Pin. Any TTL or CMOS clock source with a square wave output and 50% duty cycle (±10%) is an adequate clock source for the device. The power supply for the clock source should not necessarily be the filter’s power supply. The analog ground of the filter should be connected to clock’s ground at a single point only. Table 1 shows the clock’s low and high level threshold value for a dual or a single supply operation. A pulse generator can be used as a clock source provided the high level ON time is greater than 0.42μs (VS = ±5V). Sine waves less than 100kHz are not recommended for clock signal because excessive slow clock rise or fall times generate internal clock jitter. The maximum clock rise or fall is 1μs. The clock signal should be routed from the right side of the IC package to avoid coupling into any input or output analog signal path. A 1k resistor between the clock source and the clock input pin (5) will slow down the rise and fall times of the clock to further reduce charge coupling, Figure 1. VIN DIGITAL GROUND PLANE VOUT 4 VIN V– 0.1μF 5 CLK ANALOG GROUND PLANE ANALOG GROUND PLANE STAR SYSTEM GROUND 8 VOUT 7 V– V+ LTC1069-1 3 6 NC NC V+ 0.1μF 5 CLK AGND 2 STAR SYSTEM GROUND 1k CLOCK SOURCE DIGITAL GROUND PLANE 1k CLOCK SOURCE 10691 F01 Figure 1. Connections for Single Supply Operation 10691 F02 Figure 2. Connections for Dual Supply Operation 10691fa 6 LTC1069-1 APPLICATIONS INFORMATION Temperature Behavior The power supply current of the LTC1069-1 has a positive temperature coefficient. The GBW product of its internal op amps is nearly constant and the speed of the device does not degrade at high temperatures. Figures 3a, 3b and 3c show the behavior of the maximum passband of the device for various supplies and temperatures. The filter, especially at ±5V supply, has a passband behavior which is nearly temperature independent. Any parasitic switching transients during the rise and fall edges of the incoming clock are not part of the clock feedthrough specifications. Switching transients have frequency contents much higher than the applied clock; their amplitude strongly depends on scope probing techniques as well as grounding and power supply bypassing. The clock feedthrough can be reduced, if bothersome, by adding a single RC lowpass filter at the output pin (8) of the LTC1069-1. Clock Feedthrough Wideband Noise The clock feedthrough is defined as the RMS value of the clock frequency and its harmonics that are present at the filter’s output pin (8). The clock feedthrough is tested with the input pin (4) shorted to the AGND pin and depends on PC board layout and on the value of the power supplies. With proper layout techniques the values of the clock feedthrough are shown on Table 2. The wideband noise of the filter is the total RMS value of the device’s noise spectral density and determines the operating signal-to-noise ratio. Most of the wideband noise frequency contents lie within the filter passband. The wideband noise cannot be reduced by adding post filtering. The total wideband noise is nearly independent of the clock frequency and depends slightly on the power supply voltage (see Table 3). The clock feedthrough speci fications are not part of the wideband noise. Table 2. Clock Feedthrough VS CLOCK FEEDTHROUGH 3.3V 10μVRMS 5V 40μVRMS ±5V 160μVRMS 2.0 1.5 TA = 25°C WIDEBAND NOISE 3.3V 100μVRMS 5V 108μVRMS ±5V 112μVRMS 0 TA = –40°C –0.5 0.5 VS = ±5V fCLK = 1.5MHz VIN = 2VRMS 1.5 1.0 TA = 85°C 0.5 2.0 VS = 5V fCLK = 1MHz VIN = 1.2VRMS 1.0 TA = 85°C TA = 85°C TA = 25°C GAIN (dB) 1.0 GAIN (dB) VS 2.0 VS = 3.3V fCLK = 750kHz VIN = 0.5VRMS GAIN (dB) 1.5 Table 3. Wideband Noise 0 –0.5 0.5 TA = –40°C TA = 25°C 0 –0.5 TA = –40°C –1.0 –1.0 –1.0 –1.5 –1.5 –1.5 –2.0 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 FREQUENCY (kHz) –2.0 –2.0 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 FREQUENCY (kHz) 10691 F03a Figure 3a 1 3 5 7 9 10691 F03b Figure 3b 11 13 15 FREQUENCY (kHz) 10691 F03c Figure 3c 10691fa 7 LTC1069-1 APPLICATIONS INFORMATION Aliasing Table 4. Aliasing (fCLK = 100kHz) INPUT FREQUENCY (VIN = 1VRMS) (kHz) Aliasing is an inherent phenomenon of sampled data systems and it occurs for input frequencies approaching the sampling frequency. The internal sampling frequency of the LTC1069-1 is 100 times its cutoff frequency. For instance, if a 98kHz, 100mVRMS signal is applied at the input of an LTC1069-1 operating with a 100kHz clock, a 2kHz, 28μVRMS alias signal will appear at the filter output. Table 4 shows details. OUTPUT LEVEL (Relative to Input) (dB) OUTPUT FREQUENCY (Aliased Frequency) (kHz) fCLK/fC = 100:1, fCUTOFF = 1kHz 96 97 98 98.5 99 99.5 –90.0 –86.0 –71.0 –56.0 –1.1 –0.21 (or 104) (or 103) (or 102) (or 101.5) (or 101) (or 100.5) 4.0 3.0 2.0 1.5 1.0 0.5 TYPICAL APPLICATIONS Single 5V Operation with Power Shutdown 5V SHUTDOWN ON CMOS LOGIC 1 2 0.47μF 0.1μF 3 4 VIN AGND V VOUT 8 VOUT 7 V– + LTC1069-1 6 NC NC VIN CLK 5 fCLK ≤ 750kHz 5V 0V 1069-1 TA04 Single 3.3V Supply Operation with Output Buffer 3.3V 0.1μF 1 0.47μF 0.1μF VIN AGND VOUT 8 + 2 7 V– V+ LTC1069-1 3 6 NC NC 4 VIN CLK 5 1/2 LT1366 VOUT – fCLK 500kHz 3.3V 0V 10691 TA05 10691fa 8 LTC1069-1 PACKAGE DESCRIPTION N Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .400* (10.160) MAX 8 7 6 5 1 2 3 4 .255 ± .015* (6.477 ± 0.381) .300 – .325 (7.620 – 8.255) .065 (1.651) TYP .008 – .015 (0.203 – 0.381) ( +.035 .325 –.015 8.255 +0.889 –0.381 .130 ± .005 (3.302 ± 0.127) .045 – .065 (1.143 – 1.651) ) .120 (3.048) .020 MIN (0.508) MIN .018 ± .003 .100 (2.54) BSC (0.457 ± 0.076) N8 1002 NOTE: 1. DIMENSIONS ARE INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 8 .245 MIN 7 6 5 .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 ±.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 0°– 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN .053 – .069 (1.346 – 1.752) .014 – .019 (0.355 – 0.483) TYP INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 2 3 4 .004 – .010 (0.101 – 0.254) .050 (1.270) BSC SO8 0303 10691fa Information 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 9 LTC1069-1 TYPICAL APPLICATION Dual Supply Operation –45 fIN = 1kHz –50 AGND VOUT 8 VOUT 2 7 V– V+ LTC1069-1 0.1μF 3 6 NC NC 5V 0.1μF VIN 4 VIN CLK 5 –5V fCLK 500kHz 5V 0V THD + NOISE (dB) –55 1 fC = 5kHz –60 –65 –70 –75 –80 –85 0.1 1 INPUT VOLTAGE (VRMS) 3 10691 TA03 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1068 Very Low Noise, High Accuracy, Quad Universal Filter Building Block User-Configurable, SSOP Package LTC1069-6 Single Supply, Very Low Power, Elliptic LPF 50:1 fCLK/fC Ratio, 8-Pin SO Package LTC1164-5 Low Power 8th Order Butterworth LPF 100:1 and 50:1 fCLK/fC Ratio LTC1164-6 Low Power 8th Order Elliptic LPF 100:1 and 50:1 fCLK/fC Ratio LTC1164-7 Low Power 8th Order Linear Phase LPF 100:1 and 50:1 fCLK/fC Ratio 10691fa 10 Linear Technology Corporation LT 0309 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 1996