19-4766; Rev 1; 9/98 General Description The MAX7409/MAX741 0/MAX7413/MAX741 4 5th-order, lowpass, switched-capacitor filters (SCFs) operate from a single +8V (MAX7409/MAX7410) or +3V (MAX7413/ MAX7414) supply. These devices draw only 1.2mA of supply current and allow corner frequencies from 1Hz to 15kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They feature a shutdown mode, which reduces the supply current to O.2uA. Two clocking options are available on these devices: self-clocking (through the use of an external capacitor) or external clocking for tighter corner-frequency control. An offset adjust pin allows for adjustment of the DC out- put level. The MAX7409/MAX7413 Bessel filters provide low over- shoot and fast settling, while the MAX7410/MAX7414 MA AALIV 5th-Order, Lowpass, Switched-Capacitor Filters Features # 5th-Order Lowpass Filters Bessel Response (MAX7409/MAX7413) Butterworth Response (MAX7410/MAX7414) # Clock-Tunable Corner Frequency (1Hz to 15kHz) Single-Supply Operation +5V (MAX7409/MAX7410) +3V (MAX7413/MAX7414) Low Power 1.2mA (operating mode) 0.2nA (shutdown mode) + Available in 8-Pin pMAX/DIP Packages + Low Output Offset: +4mV Butterworth filters provide a maximally flat passband Ordering Information response. Their fixed response simplifies the design task to selecting a clock frequency. PART TEMP. RANGE PIN-PACKAGE Applications MAX7409CUA 0 to +70C & uMAX ADC Anti-Aliasing CT2 Base Stations MAX7A09CPA O to +70" __8 Plastic DIP ao . MAX?7409EUA -40S to +85C 8 uMAX DAG Postfiltering Speech Processing MAX7409EPA --40C to 485C S8 Plastic DIP Air-Bag Electronics MAX7410CUA 0% to +70C 8 wMAX : MAX?7410CGPA O to +70C 8 Plastic DIP Selector Guide MAX?410EUA -40 to +85C & uMAX PART FILTER RESPONSE vaLtaGety MAX7410EPA -40 to +85C & Plastic DIP (V) Ordering information continued at end of data sheet. MAX7409 Bessel +5 MAX7410 Butterworth +5 MAX7413 Bessel +3 Typical Operating Circuit MAX?7414 Butterworth +3 . . . VSUPPLY Pin Configuration l of wa TOP VIEW TL = Yoo SHON . s con [7 ra] aux INFUT TIN in een ppg OCT OUTPUT MAX7409 IN [2] WLAZKLAAL [> | SHON MAXT410 MAX7409 MAX7413 GND | 3 MAX7410 Ta] os CLOCK 4 CLK COM [3] MAXrai0 MAX7414 TI Vop [4] MAX7414 5] OUT ND OS . O1pF + = pMAX/DIP = MAXLAA Maxim Iniegrated Products 1 For free samples & the latest literature: hitp:/www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext 3468. VIVLXVWELVLXVW/OLPLXVW/60VZXVWNMAX 7409/MAX 74 10/MAX 7413/MAX 7414 5th-Order, Lowpass, Switched-Capacitor Filters ABSOLUTE MAXIMUM RATINGS Vpp tO GND oo... ceceeceeeeeee ee treet tenes ernetnteeeees -0.3 to +6V Operating Temperature Ranges IN, OUT, COM, OS, CLK, SHDN. -0.3V to (Vpp + 9.3V) MAXK?74 GOA ic ceecceeneeeeeeetenernaeertiens OUT Short-Circuit Duration... ccc ceccnsecsteeenereeeneee 1sec MAX74 EA ow. Continuous Power Dissipation (Ta = +70C) Storage Temperature Range 8-Pin DIP (derate 9.09mW/C above +70%).0 727mW Lead Temperature (soldering, 10sec) oo... ee +300 8-Pin uUMAX (derate 4.1mW/C above +70C) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions tor extended periods may affeci device reliability. ELECTRICAL CHARACTERISTICSMAX7409/MAX7410 (Vpp = +5V, filter output measured at OUT, 10kQ || 50pF load to GND at OUT, OS = COM, 0.1pF capacitor from COM to GND, SHDN = Vpp, fcLk = 100kHz, Ta = TmIN to Tmax, unless otherwise noted. Typical values are at Ta = +25C.) PARAMETER | SYMBOL | CONDITIONS | MIN TYP MAX | UNITS FILTER CHARACTERISTICS Corner Frequency te (Note 1) 0.001 to 15 kHz Clock-to-Corner Ratio foLk / fe 100:1 Clock-to-Corner Tempco 10 ppm/C Output Voltage Range 0.25 Vop - 0.25 V Output Offset Voltage Vorrser | VIN = Voom = Vop/ 2 +4 +25 mv Output Offest Femove 4 Voom = Vop/2 (Note 2) 0.2 0 02 | dB Total Harmonic Distortion THD:N | fIN = 200Hz, Vin = 4Vp-p, MAX7409 -85 dB plus Noise measurement bandwidth = 22kHz | MAX7410 -78 Offset Voltage Gain Aos OS to OUT 1 Viv Input, COM externally driven 2.0 2.5 3.0 COM Voltage Range Vcom Vv Output, COM unconnected 2.3 2.5 27 Input Voltage Range at OS Vos Input, OS externally driven Vcom +0.14 Vv Input Resistance at COM Room 110 180 kQ Glock Feedthrough 5 mVp-p Resistive Output Load Drive RL 10 1 ko Maximum Capacitive Output CL 50 500 pF Input Leakage Current at COM SHDN = GND, Voom = 0 to Vpp +0.1 WA Input Leakage Current at OS Vos = 0 to Vop +0.1 + HA CLOCK Internal Oscillator Frequency fosc Cosc = 1000pF (Note 3) 21 30 38 kHz Untornal Gectllctor Mode) IcLk | Volk = Oor 5V 413.5 420 | HA Glock Input High VIH 4.5 Vv Glock Inp ut Low VIL 0.5 Vv 2 MAXIM5th-Order, Lowpass, Switched-Capacitor Filters ELECTRICAL CHARACTERISTICSMAX7409/MAX7410 (VoD = +5V, filter output measured at QUT, 10k || 50pF load to GND at OUT, OS = COM, 0.1pF capacitor from GOM to GND, SHDN = Vpp, fo_k = 100kHz, Ta = Twin to Tmax, unless otherwise noted. Typical values are at Ta = +25C.) PARAMETER | SYMBOL | CONDITIONS MIN TYP MAX | UNITS POWER REQUIREMENTS Supply Voltage Vpp 45 5.5 Vv Supply Current Ipp Operating mode, no load 1.2 1.5 mA Shutdown Current lsqon | SHDN= GND 0.2 1 A Power-Supply Rejection Ratio PSRR IN = GOM (Note 4) 70 dB SHUTDOWN SHDN Input High VspH 45 Vv SHDN Input Low VspL 05 V SHDN Input Leakage Current VSHDN = Oto Vpp +0.2 +10 pA ELECTRICAL CHARACTERISTICSMAX7413/MAX7414 (Vpp = +3V, filter output measured at OUT pin, 10k || 50pF load to GND at OUT, OS = COM, 0.1pF capacitor from COM to GND, SHDN = Vpp, fo_k = 100kHz, Ta = Twin to Tmax, unless otherwise noted. Typical values are at Ta = +25C.) PARAMETER | SYMBOL | CONDITIONS | MIN TYP MAX | UNITS FILTER CHARACTERISTICS Gorner Frequency fc {Note 1) 0.001 to 15 kHz Glock-to-Gorner Ratio foik/fc 100:1 Clock-to-Corner Tempco 10 ppm/s% Output Voltage Range 0.25 Vpp - 0.25 Vv Sutput Offset Voltage Vorrser | VIN = Voom = Vop/ 2 +4 +25 mv Output Offest Remove J Voom = Vpp/ 2 (Note 2) 02 0 +02 | GB Total Harmonic Distortion THD+N | fIN = 200Hz, Vin = 2.5Vp-p, MAX7413 -83 dB plus Noise measurement bandwidth = 22kHz | MAX7414 -B1 Offset Voltage Gain Aos OS to OUT 1 VV Input, COM externally driven 1.4 1.5 1.6 Vv COM Voltage Range Voom Output, COM unconnected 14 1.5 1.6 Vv Input Voltage Range at OS Vos Input, OS externally driven Voom 0.1 Vv Input Resistance at COM Room 110 180 kQ Clock Feedthrough 3 mVp-p Resistance Output Load Drive RL 10 1 kQ Deyn capacitive Output CL 50 500 pF Input Leakage Current at COM SHDN = GND, Voom = 0 to Vpp +0.1 pA Input Leakage Current at OS Vos = 0 to Vpp +0.1 +10 pA MA AXIMA 3 VIVLXVWELVLZXVW/OLVPLXVW/60VZXVWN5th-Order, Lowpass, Switched-Capacitor Filters ELECTRICAL CHARACTERISTICSMAX7413/MAX7414 (continued) (VpD = +8V, filter output measured at QUT pin, 10k || 50pF load to GND at OUT, OS = COM, 0.1pF capacitor from COM to GND, SHDN = Vopp, folk = 100kHz, Ta = TIN to Tmax, unless otherwise noted. Typical values are at Ta = +25C.)} PARAMETER | SYMBOL | CONDITIONS | MIN TYP MAX | UNITS CLOCK Internal Oscillator Frequency fosc Cosc = 1000pF (Note 3) 21 30 38 kHz (internal Gsctlator Mode) louk | Voik = 0 or 3V e185 #20 | HA Glock Input High ViH 2.5 Vv Clock Input Low VIL 0.5 Vv POWER REQUIREMENTS Supply Voltage Vpb 27 3.6 Vv Supply Current IpD Operating mode, no load 1.2 1.5 mA Shutdown Current Ison | SHDN= GND 0.2 1 LA Power-Supply Rejection Ratio PSRR IN = GOM (Note 4) 70 dB SHUTDOWN SHDN Input High VSDH 25 V SHDN Input Low VsDL 0.5 Vv SHDN Input Leakage Current VSHDN= Oto Vpp 0.2 +10 WA MAX 7409/MAX 74 10/MAX 7413/MAX 7414 FILTER CHARACTERISTICS (Vpp = +5V for MAX7409/MAX7410, Vop = +3V for MAX7413/MAX7414, filter output measured at OUT, 10k || 50pF load to GND at OUT, SHDN = Vpp, fetk = 100kHz, Ta = Twin to Tmax, unless otherwise noted.) PARAMETER | CONDITIONS MIN TYP MAX | UNITS BESSEL FILTERSMAX7409/MAX7413 fin = 0.5fc -4 -0.74 Insertion Gain Relative to fin = fc -3.6 -3.0 -2.4 : dB DC Gain fin = 4fc -41.0 -35 fin = 7fc -64.3 -58 BUTTERWORTH FILTERSMAX7410/MAX7414 fin = 0.5f -0.3 0 Insertion Gain Relative to fin = fo -3.6 -3.0 -2.4 : dB BC Gain fin = 3fo -47.5 -43 fin = 5fc -70 -65 Note 1: The maximum fg is defined as the clock frequency fo_k = 100 x fc at which the peak &/ (THD+N) drops to 68dB with a sinusoidal input at 0.2fc. Note 2: DC insertion gain is defined as AVouT/ AVIN. Note 3: fosc (kHz) = 30 x 107 / Cogc (pF). Note 4: PSRR is the change in output voltage from a Vop of 4.5V and a Vpp of 5.5V. 4 MAAXIAA5th-Order, Lowpass, Switched-Capacitor Filters Typical Operating Characteristics (Vpp = +5V for MAX7409/MAX7410, Vpp = +34 for MAX7413/MAX741 4, foLk = 100kHz, SHDN = Vpp, COM = OS = Vop/2, Ta = +25, unless otherwise noted.) MAX7409/MAX7413 MAX741 O/MAX7414 FREQUENCY RESPONSE FREQUENCY RESP ONSE (BESSEL) (BUTTERWORTH) a |: oxi [2 8 8 3 2 a a zZ Z 5 5 0 05 1015 20 25 30 35 40 45 50 0 05 10 15 20 25 30 35 40 45 50 INPUT FREQUENCY (kHz) INPUT FREQUENCY {kHz} MAX?T410/MAX7414 MAX7409/MAX7413 PASSBAND FREQUENCY RESPONSE PHASE RESPONSE (BUTTERWORTH) (BESSEL) f= tkHe " RQ | ae IE = iestiHz [8 _ & IN Z f N\ a 3 -100 NS = E 2 aX & z N\ wi -150 a 2 \ ao 200 x 250 0 102 204 808 408 510 B12 Tid B16 918 1.02k 0 02 O4 Of 08 10 12 14 18 INPUT FRECUENCY (Hz) INPUT FREQUENCY (kHz) SUPPLY CURRENT MAAXLAA SUPPLY CURRENT (mA) yh o8 = a se F 25 3.0 vs. SUPPLY VOLTAGE 35 40 45 SUPPLY VOCLTAGE(V) 5.0 5.5 GAIN (cB) PHASE SHIFT (OBGREES) 20 24 30 a2 MAX7409/MAX7413 PASSBAND FREQUENCY RESPONSE (BESSEL) fe=1kHe O 10? 204 305 408 510 612 714 816 918 1.0Fk INPUT FREQUENCY (Hz) 0 MAX741 0/MAX7414 PHASE RESPONSE (BUTTERWORTH) oz 04 INPUT FREQUENCY (kHz) fo=tkHz MASPA0S toc VIVLXVWELVLZXVW/OLVPLXVW/60VZXVWN Of 08 10 12 14 16 Table A. THD+N vs. Input Signal Amplitude Plot Characteristics LABEL fin fe feLk MEASUREMENT (Hz) (kHz) | (kHz) | BANDWIDTH (kHz) A 200 1 100 22 B 1k 5 500 80 55th-Order, Lowpass, Switched-Capacitor Filters Typical Operating Characteristics (continued) MAX 7409/MAX 74 10/MAX 7413/MAX 7414 (Vpp = +5V for MAX7409/MAX7410, Vop = +3V for MAX7413/MAX7414, foLk = 100kHz, SHDN = Vpp, COM = OS = Vpp /2, Ta = +25, unless otherwise noted.) MAX7409 TOTAL HARMONIC DISTORTION PLUS NOISE ys. INPUT SIGNAL AMPLITUDE MAX7410 TOTAL HARMONIC DISTORTION PLUS NOISE vs. INPUT SIGNAL AM PLITUDE MAX7413 TOTAL HARM GNIC DISTORTION PLUS NOISE vs. INPUT SIGNAL AMPLITUDE SEE TABLE A i SEETABLEA SEE TABLEA : a a a i ye i 3 g 2 a a a FE FL FE A 0 05 1015 0 25 30 38 40 45 50 0 05 10 15 0 25 30 38 40 45 50 0 Of 10 15 #0 #5 40 AMPLITUDE (Vp-p) AMPLITUDE (p-p) AMPLITUDE (Vp-p) MAX7414 TOTAL HARMCNIC DISTORTION PLUS NOISE INTERNAL OSCILLATOR PERICD vs. INPUT SIGNAL AMPLITUDE SUPPLY CURRENT vs. TEMPERATURE vs. SMALL CAPACITANCE ~ 149 ow 120 2 SEETABLEA |2 8 3 3 100 : _ gl? z a 80 Raa 148 8 w a & = Cc oO g 3 145 c= 60 a > E 144 a rE 2 g 4 143 ; 20 VA 142 = / 141 0 0 Of 10 18 #20 25 30 40 20 0 #0 40 Ad 80 100 0 S00 1000 1800 2000 2600 3090 3500 AMPLITUDE (Vp-p) TEM PERATURE (C) CAPACITANCE( pF} INTERNAL OSCILLATOR PERIOD INTERNAL CSCILLATOR FREQUENCY INTERNAL OSCILLATOR FREQUENCY vs. LARGE CAPACITANCE vs. SUPPLY VOLTAGE vs. TEMPERATURE 12 2 e 3s + a | 3 Cose=100F |B Coge=1000F | 10 Vop=+5 g 3 8 31.0 A q a = % iB 8 a aoe N\ N Vpop=+3 P d 5 SO 5 / f e IN wr Ww a f) 5 fe N\ 5 3 4 fr a 5 g E / 4 295 2 - 3 Vop = +5 0 25.0 | - 0 0 100 160 200 260 300 350 25 30 35 40 45 50 55 40 -0 0 2 49 80 80 100 CAPACITANCE inF) SUPPLY VOLTAGE (V) TEMPERATURE (C) 6 MAAXIAA5th-Order, Lowpass, Switched-Capacitor Filters Typical Operating Characteristics (continued) (Vpb = +5V for MAX7409/MAX7410, Vpp = +3V for MAX7413/MAX7414, foLk = 100kHz, SHDN = Vpp, COM = OS = Vpp/ 2, Ta = +25, unless otherwise noted.) QUTPUT OFFSET VOLTAGE vs. TEMPERATURE -3.00 MAK7409 too 17 ds dis 2 g Fn OFFSET VOLTAGE (m) Fs] 40 -20 oO 20 40 60 80 100 TEMPERATURE (C} QUTPUT CFFSET VOLTAGE vs. SUPPLY VOLTAGE 20 8 25 2 2 Wi -3.0 = \ Soe \ y, H \ VY S -4.0 f , \ 7 ae \H 6.0 26 30 35 40 465 50 65 SUPPLY VOLTAGE (} Pin Description PIN NAME FUNCTION Gommen Input Pin. Biased internally at midsupply. Bypass COM externally to GND with a 0.1pF capacitor. 1 COM ot _ : . To override internal biasing, drive COM with an external supply. 2 IN Filter Inp ut 3 GND Ground 4 Vop Positive Supply Input: +5V for MAX7409/MAX?7410, +3V for MAX741 3/MAX7414. 5 OUT Filter Output Offset Adjust Input. To adjust output offset, connect OS to an external supply through a resistive voltage- 6 Os divider (Figure 3). Connect O8 to COM if no offset adjustment is needed. Refer to the Offser and Common- Mode Inout Adjustment section. 7 SHDN Shutdown Input. Drive low to enable shutdown mode; drive high or connect to Vpp for normal operation. 8 CLK Clock Input. Connect an external capacitor (Cosc) from CLK to ground: fosc (KHz) = 30 x 109 / Cosc (pF). To override the internal oscillator, connect CLK to an external clock: fe = fe_K 100. Detailed Description The MAX7409/MAX7413 Bessel filters provide low over- shoot and fast settling responses, and the MAX7410/ MAX7414 Butterworth filters provide a maximally flat passband response. All parts operate with a 100-1 clock-to-corner frequency ratio and a 15kHz maximum corner frequency. Bessel Characteristics Lowpass Bessel filters such as the MAX7409/MAX7413 delay all frequency components equally, preserving the shape of step inputs (subject to the attenuation of the MA AXIMA higher frequencies}. Bessel filters settle quicklyan important characteristic in applications that use a multi- plexer (mux) to select an input signal for an analog-to- digital converter (ADC). An anti-aliasing filter placed between the mux and the ADC must settle quickly after anew channel is selected. Butterworth Characteristics Lowpass Butterworth filters such as the MAX7410/ MAX7414 provide a maximally flat passband response, making them ideal for instrumentation applications that require minimum deviation from the DC gain throughout the passband. VIVLXVWELVLZXVW/OLVPLXVW/60VZXVWNMAX 7409/MAX 74 10/MAX 7413/MAX 7414 5th-Order, Lowpass, Switched-Capacitor Filters | 2Vdiv Vidiv 2Vidiv 200us/div A. 1kHz INPUT SIGNAL B: MAX7409 BESSEL ALTER RESPONSE, fc = SkKHz CG: MAX7410 BUTTERWORTH FILTER RESPONSE: fe = 5KHz Figure 1. Bessel vs. Butterworth Filter Response The difference between Bessel and Butterworth filters can be observed when a ikHz square wave is applied to the filter input (Figure 1, trace A). With the filter cutoff frequencies set at 5kHz, trace B shows the Bessel filter response and trace C shows the Butterworth filter response. Background Information Most switched-capacitor filters (SCFs) are designed with biquadratic sections. Each section implements two filter- ing poles, and the sections are cascaded to produce higher-order filters. The advantage to this approach is ease of design. However, this type of design is highly sensitive to component variations if any sections Q is high. An alternative approach is to emulate a passive net- work using switched-capacitor integrators with summing and scaling. Figure 2 shows a basic 5th-order ladder filter structure. A switched-capacitor filter such as the MAX7409/ MAX741 0/MAX741 3/MAX741 4 emulates a passive ladder filter. The filter's component sensitivity is low when com- pared to a cascaded biquad design, because each component affects the entire filter shape, not just one pole-zero pair. In other words, a mismatched component in a biquad design will have a concentrated error on its respective poles, while the same mismatch in a ladder filter design results in an error distributed over all poles. Rg 2 L4 VIN C1 63 cs RL tl] Figure 2. 5th-Order Ladder Filter Network Clock Signal External Clock The MAX?7409/MAX741 0/MAX7413/MAX7414 family of SCFs is designed for use with external clocks that have a 50% +10% duty cycle. When using an external clock with these devices, drive CLK with a CMOS gate pow- ered from 0 to VpD. Varying the rate of the external clock adjusts the corner frequency of the filter as fol- lows: fc = feLk / 1900 Internal Clock When using the internal oscillator, connect a capacitor (Cosc) between CLK and ground. The value of the capacitor determines the oscillator frequency as follows: fose (kHz) = 30 x 10/ Coge (pF) Minimize the stray capacitance at CLK so that it does not affect the internal oscillator frequency. Vary the rate of the internal oscillator to adjust the filters corner fre- quency by a 100:1 clock-to-corner frequency ratio. For example, an internal oscillator frequency of 100kHz produces a nominal corner frequency of 1kHz. Input Impedance vs. Clock Frequencies The MAX7409/MAX741 0/MAX7413/MAX741 4's input impedance is effectively that of a switched-capacitor resistor (see the following equation), and is inversely proportional to frequency. The input impedance values determined below represent the average input imped- ance, since the input current is not continuous. As a rule, use a driver with an output impedance less than 10% of the filter's input impedance. Estimate the input impedance of the filter using the following formula: ZIN= 1/(fCLK x 2.1pF) For example, an foLk of 100kHz results in an input impedance of 4.8MQ. MAAXIAA5th-Order, Lowpass, Switched-Capacitor Filters Low-Power Shutdown Mode These devices feature a shutdown mode that is activat- ed by driving SHDN low. In shutdown mode, the filter's supply current reduces to 0.2uUA and its cutout becomes high impedance. For normal operation, drive SHDN high or connect it to VoD. Applications Information Offset and Common-Mode Input Adjustment The COM pin sets the common-mede input voltage and is biased at mid-supply with an internal resistor-divider. If the application does not require offset adjustment, connect OS to COM. For applications requiring offset adjustment, apply an external bias voltage through a resistor-divider network to OS such as shown in Fig- ure 3. For applications that require DC level shifting, adjust OS with respect to COM. (Note: OS should not be left unconnected.) The output voltage is represent- ed by this equation: VOUT = (VIN - Vcom) + Vos with Vcom = Vop / 2 (typical), and where (Vin - Vcom) is lowpass filtered by the SCF, and OS is added at the output stage. See the Efectrical Characteristics for the voltage range of COM and O&S. Changing the voltage on COM or O8S significantly from midsupply reduces the filter's dynamic range. Power Supplies The MAX7409/MAX7410 operate from a single +5V supply and the MAX7413/MAX7414 operate from a sin- gle +3V supply. Bypass Vpp to GND with a 0.1uF capacitor. If dual supplies are required (+2.5V for MAX7409/MAX7410, +1.5V for MAX7413/MAX741 4}, connect COM to system ground and connect GND to the negative supply. Figure 4 shows an example of dual-supply operation. Single- and dual-supply perfor- mance are equivalent. For either single- or dual-supply operation, drive GLK and SHDN from GND (V- in dual- supply operation) to Vpp. For +5V dual-supply applica- tions, use the MAX291-MAX297. Input Signal Amplitude Range The optimal input signal range is determined by observing the voltage level at which the Total Harmonic Distortion + Noise is minimized for a given corner fre- quency. The Typical Operating Characteristics show graphs of the devices Total Harmonic Distortion plus Noise Response as the input signals peak-to-peak amplitude is varied. MA AXIMA VeUPPLY o4 woe | I Voo SHON ~ OUT - OuTPLT INPUT IN COM MAXLAA owe 50k MAX?409 MAX?410 L MAX?413 ~ clock 4 CLK Maxvatg 08 Sul 50k O1MF | : 50k HY 2 Figure 3. Offset Adjustment Circuit Ve Vor =] out oureur INPUT f IN com MAAXILAA = v MAX7409 ke LP Lscck Sox hana MAX7414 ain] | ome *DAIVE SHDN TO - FOR LOW: POWER SHUTDOWN MODE. Figure 4. Dual-Suoply Operation Anti-Aliasing and DAC Postfiltering When using these devices for anti-aliasing or DAC postfiltering, synchronize the DAC (or ADC) and the fil- ter clocks. If the clocks are nat synchronized, beat fre- quencies will alias into the desired passband. Harmonic Distortion Harmenic distortion arises from nonlinearities within the filter. These nonlinearities generate harmonics when a pure sine wave is applied to the filter input. Table 1 lists typical harmonic-distortion values for the MAX7410/ MAX7414 with a 10kQ load at Ta = +25C. Table 2 lists typical harmonic-distortion values for the MAX7409/ MAX7413 with a 10k load at TA = +25C. VIVLXVWELVLZXVW/OLVPLXVW/60VZXVWNMAX 7409/MAX 74 10/MAX 7413/MAX 7414 5th-Order, Lowpass, Switched-Capacitor Filters Table 1. MAX7410/MAX7414 Typical Harmonic Distortion FILTER folk fin VIN TYPICAL HARMONIC DISTORTION (dB) (kHz) (Hz) (Vp-p) 2nd 3rd 4th 5th 500 1k -85 -67 -86.7 -82 MAX7410 4 100 200 -84 -78 -88.7 -88.5 500 ik -85.3 -74 -87.1 -87.6 MAX7414 2 100 200 -86.1 -85.5 -85.8 -86.4 Table 2. MAX7409/MAX7413 Typical Harmonic Distortion FILTER folk fin VIN TYPICAL HARMONIC DISTORTION (dB) (kHz) (Hz) (Vp-p) 2nd 3rd 4th 5th 500 1k -82.5 -79 -88.8 O41 MAX7409 4 100 200 -83.5 -85.4 -88.4 -88.8 500 1k -86 -84 873 -87.9 MAX7413 2 100 200 -86.4 -86.9 -87.9 -88.3 _Ordering Information (continued) PART TEMP. RANGE PIN-PACKAGE MAX7413CUA OT to +70 & uMAX MAX7413CPA OT to +70 8 Plastic DIP MAX7413EUA -40 to +85 8 UMAX MAX7413EPA -40%T to +85 & Plastic DIP MAX7414GUA OT to +70 & uMAX MAX7414GPA OT to +70 & Plastic DIP MAX7414EUA -40% to +85 & uUMAX MAX7414EPA -40% to +85 & Plastic DIP 10 TRANSISTOR COUNT: 1457 Chip Information MAAXIAA5th-Order, Lowpass, Switched-Capacitor Filters Package Information | HAA A | J Poo ee Al NOTED: 1. DEE DO NOT INCLUDE MOLD FLAZTH. 2. MOLD FLATH OF PRPOTPUZION? NOT TO EXCEED 15mm .006). 3 CONTPOLLING DIMENSION: INCHES INCHES MILLIMETEP = MIN | Max | MIN | MAX A (0036 [0044 [Oo Ll Al |og04 |o00S |ol0 a.20 BE footw [ood [oes [ose c [nos foon7 [og ae D [oe foten [295 [3.05 e 0.0256 0.65 E joie |oi2o 2.45 3.05 H [oes [o19e [4.78 5.03 L [0.016 }|O0e6 {0.41 O66 a lo [6 a Bs \ Liotta? Lt Sf | P\\ SSE eee = BLUMAXD EPS TITLE SLD uMAx PACH AGE OUTLINE Dw. DOCUMENT CONTROL No APPPOYAL S4VIAAILSVI PROPRIETARY NFOPMATION pita MA AXIMA 11 VIVLXVWELVLZXVW/OLVPLXVW/60VZXVWNMAX 7409/MAX 7410/MAX7413/MAX 7414 5th-Order, Lowpass, Switched-Capacitor Filters Package Information (continued) POPNEFE D { h=- El ~] re per Or I : } | a : oe SE == && ~I TMCHE MILLIMETEP: IMLHE. MILLIMETER. MIM | MA* | MIM MAS MIM | Meas ; MAX, &}|--- [deoo | --- |S. U OsS0 (8, Sal fs ALLS [--- =c7 iu 76S [Ls la43 2{WleS 445 U aU 7S | Le Yds AS, OSS cs D cco telesest EB ALE US u eo + Bl fA.045 U 28,9] s213 C00 u 34.54) 35,05 TH | COS ee Wn bee DO WOT INCLUDE MOLD FLacH Eli e40 [0 a 2. WOLD FLASH OP PPOTPLSION: NOT e /O,100 -- TO E*CEED .LSmm de? = 3, CONTROLLING DIMENCIOM! MILLIMETER eA] 0, SO | -- --> 4. MEETS JEDEC Mooul-* Ac SHOWH eB) --- |t.4o0 _ IN ABOVE TABLE _ _. L [nii5 [0.150 e NS WONBES OF PIN | ZVIAXIM [PACKAGE FAMILY OUTLINE: PUIP 300] 4 J2l-0043 4 Fe Fro Ce roe LL peter corm, ieee very Maxim cannot assume responsibilily for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without nolice at any time. 12 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 1998 Maxim Integrated Products Printed USA MAAXIAA js a registered trademark of Maxim Integrated Products.