MAX7409/MAX7410/MAX7413/MAX7414 19-4766 Rev 1 9/98 5th-Order, Lowpass, Switched-Capacitor Filters General Description Features The MAX7409/MAX7410/MAX7413/MAX7414 5th-order, 5th-Order Lowpass Filters lowpass, switched-capacitor filters (SCFs) operate from Bessel Response (MAX7409/MAX7413) a single +5V (MAX7409/MAX7410) or +3V (MAX7413/ Butterworth Response (MAX7410/MAX7414) MAX7414) supply. These devices draw only 1.2mA of Clock-Tunable Corner Frequency (1Hz to 15kHz) supply current and allow corner frequencies from 1Hz to 15kHz, making them ideal for low-power post-DAC Single-Supply Operation filtering and anti-aliasing applications. They feature a +5V (MAX7409/MAX7410) shutdown mode, which reduces the supply current to +3V (MAX7413/MAX7414) 0.2A. Low Power Two clocking options are available on these devices: 1.2mA (operating mode) self-clocking (through the use of an external capacitor) or external clocking for tighter corner-frequency control. 0.2A (shutdown mode) An offset adjust pin allows for adjustment of the DC out- Available in 8-Pin MAX/DIP Packages put level. Low Output Offset: 4mV The MAX7409/MAX7413 Bessel filters provide low over- shoot and fast settling, while the MAX7410/MAX7414 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 MAX7409CUA 0C to +70C 8 MAX Applications MAX7409CPA 0C to +70C 8 Plastic DIP ADC Anti-Aliasing CT2 Base Stations MAX7409EUA -40C to +85C 8 MAX DAC Postfiltering Speech Processing MAX7409EPA -40C to +85C 8 Plastic DIP Air-Bag Electronics MAX7410CUA 0C to +70C 8 MAX MAX7410CPA 0C to +70C 8 Plastic DIP Selector Guide MAX7410EUA -40C to +85C 8 MAX OPERATING MAX7410EPA -40C to +85C 8 Plastic DIP PART FILTER RESPONSE VOLTAGE (V) Ordering Information continued at end of data sheet. MAX7409 Bessel +5 MAX7410 Butterworth +5 MAX7413 Bessel +3 Typical Operating Circuit MAX7414 Butterworth +3 V SUPPLY Pin Configuration 0.1F TOP VIEW V DD SHDN INPUT IN OUT OUTPUT COM 1 8 CLK MAX7409 IN 2 7 SHDN MAX7410 MAX7409 MAX7413 MAX7410 GND 3 6 OS CLOCK CLK COM MAX7414 MAX7413 MAX7414 OS 0.1F V 4 5 OUT DD GND MAX/DIP Maxim Integrated Products 1 For free samples & the latest literature: 5th-Order, Lowpass, Switched-Capacitor Filters ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Operating Temperature Ranges DD IN, OUT, COM, OS, CLK, SHDN ................-0.3V to (V + 0.3V) MAX74 C A ...................................................0C to +70C DD OUT Short-Circuit Duration...................................................1sec MAX74 E A ................................................-40C to +85C Continuous Power Dissipation (T = +70C) Storage Temperature Range .............................-65C to +160C A 8-Pin DIP (derate 9.09mW/C above +70C)...............727mW Lead Temperature (soldering, 10sec) .............................+300C 8-Pin MAX (derate 4.1mW/C above +70C) .............330mW 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 for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICSMAX7409/MAX7410 (V = +5V, filter output measured at OUT, 10k 50pF load to GND at OUT, OS = COM, 0.1F capacitor from COM to GND, DD SHDN = V , f = 100kHz, T = T to T , unless otherwise noted. Typical values are at T = +25C.) DD CLK A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS FILTER CHARACTERISTICS Corner Frequency f (Note 1) 0.001 to 15 kHz c Clock-to-Corner Ratio f / f 100:1 CLK c Clock-to-Corner Tempco 10 ppm/C Output Voltage Range 0.25 V - 0.25 V DD Output Offset Voltage V V = V = V / 2 4 25 mV OFFSET IN COM DD DC Insertion Gain with V = V / 2 (Note 2) -0.2 0 0.2 dB COM DD Output Offset Removed MAX7409 -85 Total Harmonic Distortion f = 200Hz, V = 4Vp-p, IN IN THD+N dB plus Noise measurement bandwidth = 22kHz MAX7410 -78 Offset Voltage Gain A OS to OUT 1 V/V OS Input, COM externally driven 2.0 2.5 3.0 COM Voltage Range V V COM Output, COM unconnected 2.3 2.5 2.7 Input Voltage Range at OS V Input, OS externally driven V 0.1 V OS COM Input Resistance at COM R 110 180 k COM Clock Feedthrough 5 mVp-p Resistive Output Load Drive R 10 1 k L Maximum Capacitive Output C 50 500 pF L Load Drive Input Leakage Current at COM SHDN = GND, V = 0 to V 0.1 10 A COM DD Input Leakage Current at OS V = 0 to V 0.1 10 A OS DD CLOCK Internal Oscillator Frequency f C = 1000pF (Note 3) 21 30 38 kHz OSC OSC Clock Output Current I V = 0 or 5V 13.5 20 A CLK CLK (Internal Oscillator Mode) Clock Input High V 4.5 V IH Clock Input Low V 0.5 V IL 2 MAX7409/MAX7410/MAX7413/MAX7414