LTC1069-1CS8

LTC1069-1 Low Power, 8th Order Progressive Elliptic, Lowpass Filter FEATURES s s s s s s s s s s 8th Order Elliptic Filter in SO-8 Package Operates from Single 3.3V to ± 5V Power Supplies – 20dB at 1.2 fCUTOFF – 52dB at 1.4 fCUTOFF – 70dB at 2 fCUTOFF 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 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 0.9 fCUTOFF. The stopband attenuation of the LTC1069-1 features a progressive elliptic response reaching 20dB attenuation at 1.2 fCUTOFF, 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. 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. , LTC and LT are registered trademarks of Linear Technology Corporation. APPLICATI s s Telecommunication Filters Antialiasing Filters DESCRIPTIO 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. TYPICAL APPLICATI Single 3.3V Supply 3kHz Elliptic Lowpass Filter + 1 0.47µF 3.3V 0.1µF 2 AGND V + V LTC1069-1 3 6 NC NC VIN 4 VIN CLK 5 fCLK 300kHz 1069-1 TA01 –7 GAIN (dB) UO U UO S Frequency Response 10 0 –10 VOUT 8 VOUT –20 –30 –40 –50 –60 –70 –80 1.5 3 6 4.5 FREQUENCY (kHz) 7.5 1069-1 TA02 1 LTC1069-1 ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO TOP VIEW AGND 1 V+ 2 NC 3 VIN 4 N8 PACKAGE 8-LEAD PDIP 8 7 6 5 VOUT V– NC CLK Total Supply Voltage (V + to V –) ............................. 12V Maximum Voltage at Any Pin ............................ (V– – 0.3V) ≤ V ≤ (V+ + 0.3V) Operating Temperature Range LTC1069-1C ........................................... 0°C to 70°C LTC1069-1I ....................................... – 40°C to 85°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C ORDER PART NUMBER LTC1069-1CN8 LTC1069-1CS8 LTC1069-1IN8 LTC1069-1IS8 S8 PART NUMBER 10691 10691I S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 110°C, θJA = 100° C/W (N8) TJMAX = 110°C, θJA = 150°C/W (S8) Consult factory for Military grade parts. ELECTRICAL CHARACTERISTICS 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, TA = 25°C, unless otherwise noted. All AC gains are measured relative to the passband gain. PARAMETER Passband Gain (fIN ≤ 0.25fCUTOFF) CONDITIONS VS = ± 5V, fTEST = 1.25kHz, VS = 3.3V, fTEST = 0.5kHz, Gain at 0.50fCUTOFF VS = ± 5V, fTEST = 2.5kHz, VS = 3.3V, fTEST = 1kHz, Gain at 0.75fCUTOFF VS = ± 5V, fTEST = 3.75kHz, VS = 3.3V, fTEST = 1.5kHz, Gain at 0.90fCUTOFF VS = ± 5V, fTEST = 4.5kHz, VS = 3.3V, fTEST = 1.8kHz, Gain at 0.95fCUTOFF VS = ± 5V, fTEST = 4.75kHz, VS = 3.3V, fTEST = 1.9kHz, Gain at fCUTOFF VS = ± 5V, fTEST = 5.0kHz, VS = 3.3V, fTEST = 2.0kHz, Gain at 1.25fCUTOFF VS = ± 5V, fTEST = 6.25kHz, VS = 3.3V, fTEST = 2.5kHz, fCLK = 500kHz VIN = 1VRMS fCLK = 200kHz VIN = 0.5VRMS fCLK = 500kHz VIN = 1VRMS fCLK = 200kHz VIN = 0.5VRMS fCLK = 500kHz VIN = 1VRMS fCLK = 200kHz VIN = 0.5VRMS fCLK = 500kHz VIN = 1VRMS fCLK = 200kHz VIN = 0.5VRMS fCLK = 500kHz VIN = 1VRMS fCLK = 200kHz VIN = 0.5VRMS fCLK = 500kHz VIN = 1VRMS fCLK = 200kHz VIN = 0.5VRMS fCLK = 500kHz VIN = 1VRMS fCLK = 200kHz VIN = 0.5VRMS q q q q q q q q q q q q q q MIN – 0.30 – 0.35 – 0.30 – 0.35 – 0.10 – 0.11 – 0.10 – 0.11 – 0.20 – 0.25 – 0.20 – 0.25 – 0.20 – 0.25 – 0.20 – 0.25 – 0.30 – 0.35 – 0.30 – 0.35 – 1.25 – 1.35 – 1.25 – 1.35 – 30 – 31 – 30 – 31 TYP 0.2 0.2 – 0.03 – 0.03 0.04 0.04 – 0.01 – 0.01 – 0.05 – 0.04 – 0.70 – 0.61 – 27 – 27 MAX 0.70 0.75 0.70 0.75 0.10 0.11 0.10 0.11 0.20 0.25 0.20 0.25 0.20 0.25 0.20 0.25 0.30 0.35 0.30 0.35 – 0.25 – 0.15 – 0.25 – 0.15 – 25 – 24 – 25 – 24 UNITS dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB 2 U W U U WW W LTC1069-1 ELECTRICAL CHARACTERISTICS 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, TA = 25°C, unless otherwise noted. All AC gains are measured relative to the passband gain. PARAMETER Gain at 1.50fCUTOFF CONDITIONS VS = ± 5V, fTEST = 7.5kHz, VS = 3.3V, fTEST = 3kHz, Output DC Offset (Input at AGND) VS = ± 5V, VS = 4.75V, VS = 3.3V, VS = ± 5V VS = 4.75V VS = 3.3V VS = ± 5V VS = 4.75V VS = 3.3V VS = ± 5V VS = 4.75V VS = 3.3V 0 30 ±1.57 43 fCLK = 500kHz fCLK = 400kHz fCLK = 200kHz fCLK = 500kHz VIN = 1VRMS fCLK = 200kHz VIN = 0.5VRMS fCLK = 500kHz fCLK = 400kHz fCLK = 200kHz q q q q q q q q MIN – 58 – 59 – 58 – 59 TYP – 53 – 53 30 20 15 MAX – 50 – 49 – 50 – 49 150 100 3.25 1.25 0.60 5.5 4.5 3.5 UNITS dB dB dB dB mV mV mV V V V mA mA mA MHz MHz MHz Output Voltage Swing – 3.25 – 1.50 – 0.70 ± 4.0 ± 1.7 ± 0.9 3.8 2.5 2.0 1.2 0.8 0.5 Power Supply Current Maximum Clock Frequency Input Frequency Range Input Resistance Operating Power Supply Voltage The q denotes specificatons which apply over the full operating temperature range. fCLK/2 70 ± 5.5 MHz kΩ V TYPICAL PERFORMANCE CHARACTERISTICS Passband Gain vs Frequency 1.0 0.8 0.6 0.4 VS = ±5V fCLK = 500kHz fC = 5kHz VIN = 2VRMS GAIN (DB) GAIN (dB) 0 –0.2 –0.4 –0.6 –0.8 –1.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 FREQUENCY (kHz) 1069-1 G01 –40 –50 –60 –70 –80 –90 5 6 7 8 9 FREQUENCY (kHz) 10 11 GAIN (dB) 0.2 UW Transition Band Gain vs Frequency 10 0 –10 –20 –30 VS = ±5V fCLK = 500kHz fC = 5kHz VIN = 2VRMS –70 –72 –74 –76 –78 –80 –82 –84 –86 –88 –90 Stopband Gain vs Frequency VS = ±5V fCLK = 500kHz fC = 5kHz VIN = 2VRMS 11 12 13 14 15 16 17 18 19 20 21 FREQUENCY (kHz) 1069-1 G03 1069-1 G02 3 LTC1069-1 TYPICAL PERFORMANCE CHARACTERISTICS Passband Gain vs Clock Frequency, VS = Single 3.3V 2.0 1.5 1.0 VS = SINGLE 3.3V VIN = 0.5VRMS fCLK = 750kHz fC = 7.5kHz 2.0 1.5 1.0 VS = SINGLE 5V VIN = 1.2VRMS fCLK = 750kHz fC = 7.5kHz fCLK = 1MHz fC = 10kHz GAIN (dB) 0 –0.5 –1.0 –1.5 –2.0 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 fCLK = 500kHz fC = 5kHz GAIN (dB) GAIN (dB) 0.5 FREQUENCY (kHz) 1069-1 G04 Gain vs Supply Voltage 10 0 –10 –20 PHASE (DEG) 0 fCLK = 500kHz VIN = 0.5VRMS GAIN (dB) –30 –40 –50 –60 –70 –80 –90 1 3 5 VS = ± 5V 7 9 11 13 15 17 19 21 FREQUENCY (kHz) 1069-1 G07 –270 –360 –450 –540 –630 –720 0 1 2 3 4 5 6 7 FREQUENCY (kHz) 1069-1 G08 0.5 0.4 0.3 GROUP DELAY 0.2 0.1 0 VS = 3.3V VS = 5V 1V/DIV Dynamic Range THD + Noise vs VIN (VRMS) –40 –45 –50 fCLK = 500kHz fIN = 1kHz VS = 5V VS = 3.3V VS = ± 5V –60 –62 –64 THD + NOISE (dB) THD + NOISE (dB) THD + NOISE (dB) –55 –60 –65 –70 –75 –80 –85 –90 0.1 1.0 2.0 5.0 2.67 0.65 1.22 INPUT VOLTAGE (VRMS) 1069-1 G10 0.3 4 UW Passband Gain vs Clock Frequency, VS = Single 5V 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 Passband Gain vs Clock Frequency, VS = ± 5V VS = ± 5V VIN = 2VRMS fCLK = 1.5MHz fC = 15kHz 0.5 0 –0.5 –1.0 –1.5 fCLK = 500kHz fC = 5kHz fCLK = 1MHz fC = 10kHz fCLK = 500kHz fC = 5kHz –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) 1069-1 G05 1 3 5 7 9 11 13 15 FREQUENCY (kHz) 1069-1 G06 Phase and Group Delay vs Frequency –90 –180 PHASE VS = SINGLE 5V fCLK = 500kHz fC = 5kHz 0.6 GROUP DELAY (ms) Transient Response 0.2ms/DIV VS = ± 5V fCLK = 1MHz fIN = 500Hz 4VP-P SQUARE WAVE 1069-1 G09 THD + Noise vs Frequency –40 fCLK = 500kHz VIN = 300mVRMS –45 –50 –55 –60 –65 –70 –75 –80 –85 –90 1 2 3 INPUT FREQUENCY (kHz) 4 5 THD + Noise vs Frequency fCLK = 500kHz –66 –68 –70 –72 –74 –76 –78 –80 VS = ± 5V VS = 3.3V VS = 5V VS = 3.3V VIN = 0.5VRMS VS = 5V VIN = 1VRMS VS = ± 5V VIN = 2VRMS 1 2 3 INPUT FREQUENCY (kHz) 4 5 1069-1 G11 1069-1 G12 LTC1069-1 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Supply Voltage 5 fCLK = 10Hz 4 SUPPLY CURRENT (mA) OUTPUT VOLTAGE SWING (V) SUPPLY CURRENT (mA) 3 85°C 2 25°C –40°C 1 0 0 1 3 4 5 2 TOTAL SUPPLY VOLTAGE (± V) 6 1069-1 G13 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. 1 0.47µF V+ 0.1µF 2 3 4 8 AGND V+ LTC1069-1 6 NC NC VIN CLK 5 VIN ANALOG GROUND PLANE STAR SYSTEM GROUND DIGITAL GROUND PLANE Figure 1. Connections for Single Supply Operation UW VOUT 7 V– Supply Current vs Clock Frequency 5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 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) 1069-1 G14 Output Voltage Swing vs Temperature 4 3 2 1 0 –1 –2 –3 –4 –5 –40 VS = ±2.5V VS = ± 5V –20 0 20 40 60 AMBIENT TEMPERATURE (°C) 80 1069-1 G15 VS = ± 5V VS = ± 2.5V VS = ±1.57V VS = ±1.57V VS = ± 5V VS = 5V VS = 3.3V U U U 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. VOUT V+ 0.1µF 1 2 3 VIN 4 AGND VOUT 8 VOUT V– 0.1µF V+ LTC1069-1 6 NC NC VIN CLK 5 7 V– ANALOG GROUND PLANE 1k CLOCK SOURCE STAR SYSTEM GROUND DIGITAL GROUND PLANE 1k CLOCK SOURCE 1069-1 F01 1069-1 F02 Figure 2. Connections for Dual Supply Operation 5 LTC1069-1 PIN FUNCTIONS 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. 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. Table 1. Clock Source High and Low Thresholds POWER SUPPLY Dual Supply = ± 5V Single Supply = 10V Single Supply = 5V Single Supply = 3.3V HIGH LEVEL 1.5V 6.5V 1.5V 1.2V LOW LEVEL 0.5V 5.5V 0.5V 0.5V 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, 2.0 1.5 1.0 GAIN (dB) 2.0 VS = 3.3V fCLK = 750kHz VIN = 0.5VRMS 1.5 TA = 25°C TA = 85°C GAIN (dB) 1.0 0.5 0 –0.5 –1.0 –1.5 TA = 85°C GAIN (dB) 0.5 0 –0.5 –1.0 –1.5 –2.0 0.5 1.5 2.5 TA = – 40°C 3.5 4.5 5.5 6.5 7.5 FREQUENCY (kHz) 1069-1 F03a –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) 1069-1 F03b Figure 3a 6 U W U U U U U 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. especially at ± 5V supply, has a passband behavior which is nearly temperature independent. Clock Feedthrough 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 2.0 VS = 5V fCLK = 1MHz VIN = 1.2VRMS TA = 25°C 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 1 VS = ± 5V fCLK = 1.5MHz VIN = 2VRMS TA = 85°C TA = – 40°C TA = 25°C TA = –40°C 3 5 7 9 11 13 15 FREQUENCY (kHz) 1069-1 F03c Figure 3b Figure 3c LTC1069-1 APPLICATIONS INFORMATION 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. Table 2. Clock Feedthrough VS 3.3V 5V ± 5V CLOCK FEEDTHROUGH 10µVRMS 40µVRMS 160µVRMS 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. Wideband Noise 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 TYPICAL APPLICATIONS Single 5V Operation with Power Shutdown 5V SHUTDOWN ON CMOS LOGIC 0.1µF 1 0.47µF 0.1µF 2 AGND VOUT 8 VOUT 0.47µF 0.1µF 7 V– V+ LTC1069-1 3 6 NC NC VIN 4 VIN CLK 5 fCLK ≤ 750kHz 5V 0V 1069-1 TA04 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. U W U U U supply voltage (see Table 3). The clock feedthrough specifications are not part of the wideband noise. Table 3. Wideband Noise VS 3.3V 5V ± 5V WIDEBAND NOISE 100µVRMS 108µVRMS 112µVRMS Aliasing 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. Table 4. Aliasing (fCLK = 100kHz) INPUT FREQUENCY OUTPUT LEVEL (Relative to Input) (VIN = 1VRMS) (kHz) (dB) fCLK/fC = 100:1, fCUTOFF = 1kHz 96 (or 104) – 90.0 97 (or 103) – 86.0 98 (or 102) – 71.0 985. (or 101.5) – 56.0 99 (or 101) – 1.1 99.5 (or 100.5) – 0.21 OUTPUT FREQUENCY (Aliased Frequency) (kHz) 4.0 3.0 2.0 1.5 1.0 0.5 Single 3.3V Supply Operation with Output Buffer 3.3V 1 2 AGND V + VOUT 8 + 1/2 LT1366 VOUT V LTC1069-1 3 6 NC NC 4 VIN CLK 5 fCLK 500kHz 3.3V 0V –7 – 1069-1 TA05 VIN 7 LTC1069-1 TYPICAL APPLICATIONS U Dual Supply Operation –45 –50 –55 AGND VOUT VOUT – 5V 1 5V 0.1µF 2 8 fIN = 1kHz THD + NOISE (dB) –60 –65 –70 –75 –80 –85 0.1 1 INPUT VOLTAGE (VRMS) 3 1069-1 TA03 7 V– V+ LTC1069-1 0.1µF 3 6 NC NC VIN 4 VIN CLK 5 fCLK 500kHz 5V 0V fC = 5kHz PACKAGE DESCRIPTION 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) 0.065 (1.651) TYP 0.005 (0.127) MIN 0.100 ± 0.010 (2.540 ± 0.254) 0.125 (3.175) MIN 0.018 ± 0.003 (0.457 ± 0.076) 0.015 (0.380) MIN ( +0.025 0.325 –0.015 +0.635 8.255 –0.381 ) *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) 0.010 – 0.020 × 45° (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.016 – 0.050 0.406 – 1.270 *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE RELATED PARTS PART NUMBER LTC1068 LTC1069-6 LTC1164-5 LTC1164-6 LTC1164-7 DESCRIPTON Very Low Noise, High Accuracy, Quad Universal Filter Building Block Single Supply, Very Low Power, Elliptic LPF Low Power 8th Order Butterworth LPF Low Power 8th Order Elliptic LPF Low Power 8th Order Linear Phase LPF COMMENTS User-Configurable, SSOP Package 50:1 fCLK/fC Ratio, 8-Pin SO Package 100:1 and 50:1 fCLK/fC Ratio 100:1 and 50:1 fCLK/fC Ratio 100:1 and 50:1 fCLK/fC Ratio LT/GP 1196 7K • PRINTED IN USA 8 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 q (408) 432-1900 FAX: (408) 434-0507q TELEX: 499-3977 q www.linear-tech.com U Dimensions in inches (millimeters) unless otherswise noted. N8 Package 8-Lead PDIP (Narrow 0.300) (LTC DWG # 05-08-1510) 0.045 – 0.065 (1.143 – 1.651) 0.130 ± 0.005 (3.302 ± 0.127) 0.400* (10.160) MAX 8 7 6 5 0.255 ± 0.015* (6.477 ± 0.381) 1 2 3 4 N8 0695 S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.053 – 0.069 (1.346 – 1.752) 0°– 8° TYP 8 0.004 – 0.010 (0.101 – 0.254) 0.228 – 0.244 (5.791 – 6.197) 0.150 – 0.157** (3.810 – 3.988) 0.189 – 0.197* (4.801 – 5.004) 7 6 5 0.014 – 0.019 (0.355 – 0.483) 0.050 (1.270) BSC 1 2 3 4 SO8 0695 © LINEAR TECHNOLOGY CORPORATION 1996