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MAX7400 Datasheet(数据表) 1 Page - Maxim Integrated Products |
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MAX7400 Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 page 
General Description The MAX7400/MAX7403/MAX7404/MAX7407 8th-order, lowpass, elliptic, switched-capacitor filters (SCFs) oper- ate from a single +5V (MAX7400/MAX7403) or +3V (MAX7404/MAX7407) supply. These devices draw 2mA of supply current and allow corner frequencies from 1Hz to 10kHz, making them ideal for low-power anti- aliasing and post-DAC filtering applications. They fea- ture a shutdown mode that reduces the supply current to 0.2µA. Two clocking options are available: self-clocking (through the use of an external capacitor) or external clocking for tighter cutoff-frequency control. In addition, an offset adjustment pin (OS) allows for the adjustment of the DC output level. The MAX7400/MAX7404 provide 82dB of stopband rejection and a sharp rolloff with a transition ratio of 1.5. The MAX7403/MAX7407 provide a sharper rolloff with a transition ratio of 1.2, while still delivering 60dB of stop- band rejection. The fixed response of these devices simplifies the design task to corner-frequency selection by setting a clock frequency. The MAX7400/ MAX7403/MAX7404/MAX7407 are available in 8-pin SO and DIP packages. Applications ADC Anti-Aliasing Speech Processing Post-DAC Filtering Air-Bag Electronics CT2 Base Stations Features o 8th-Order Lowpass Elliptic Filter o Low Noise and Distortion -82dB THD + Noise (MAX7400) o Clock-Tunable Corner Frequency (1Hz to 10kHz) o 100:1 Clock-to-Corner Ratio o Single-Supply Operation +5V (MAX7400/MAX7403) +3V (MAX7404/MAX7407) o Low Power 2mA (Operating Mode) 0.2µA (Shutdown Mode) o Available in 8-Pin SO and DIP Packages o Low Output Offset: ±5mV 8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters ________________________________________________________________ Maxim Integrated Products 1 VDD IN CLK OUT GND INPUT 0.1 µF 0.1 µF CLOCK SHDN OUTPUT VSUPPLY COM OS MAX7400 MAX7403 MAX7404 MAX7407 OS OUT VDD 1 2 8 7 CLK SHDN IN GND COM SO/DIP TOP VIEW 3 4 6 5 MAX7400 MAX7403 MAX7404 MAX7407 Typical Operating Circuit 19-4764; Rev 2; 6/99 Ordering Information continued at end of data sheet. Pin Configuration Ordering Information Selector Guide MAX7407 Elliptic (r = 1.2) +3 PART FILTER RESPONSE OPERATING VOLTAGE (V) MAX7403 MAX7400 Elliptic (r = 1.5) +5 Elliptic (r = 1.2) +5 MAX7404 Elliptic (r = 1.5) +3 PART MAX7400CSA MAX7400CPA MAX7400ESA -40°C to +85°C 0°C to +70°C 0°C to +70°C TEMP. RANGE PIN-PACKAGE 8 SO 8 Plastic DIP 8 SO MAX7400EPA -40°C to +85°C 8 Plastic DIP For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. |
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