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Part: MAX7403E
Category:
Analog & Mixed-Signal Processing
-> Filters
Description: 8th-Order, Lowpass, Elliptic, Switched-capacitor Filters
Company: Maxim Integrated Products
Datasheet: Download MAX7403E datasheet File size : 554 kB
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Datasheet text preview:
19-4764; Rev 2; 6/99
8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters
General Description
The MAX7400/MAX7403/MAX7404/MAX7407 8th-order, lowpass, elliptic, switched-capacitor filters (SCFs) opera t e 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 antialiasing and post-DAC filtering applications. They feature a shutdown mode that reduces the supply current to 0.2µA. T w o 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. T h e 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 stopband rejection. The fixed response of these devices simplifies the design task to corner-frequency selection b y setting a clock frequency. The MAX7400/ MAX7403/MAX7404/MAX7407 are available in 8-pin SO and DIP packages. 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
Features
MAX7400/MAX7403/MAX7404/MAX7407
Ordering Information
PART MAX7400CSA MAX7400CPA MAX7400ESA MAX7400EPA TEMP. RANGE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP
Applications
ADC Anti-Aliasing Post-DAC Filtering CT2 Base Stations Speech Processing Air-Bag Electronics
Ordering Information continued at end of data sheet.
Selector Guide
PART MAX7400 FILTER RESPONSE Elliptic (r = 1.5) Elliptic (r = 1.2) Elliptic (r = 1.5) Elliptic (r = 1.2) OPERATING VOLTAGE (V) +5 +5 +3 +3
Typical Operating Circuit
VSUPPLY 0.1µF VDD INPUT IN SHDN OUT OUTPUT
MAX7403 MAX7404 MAX7407
Pin Configuration
TOP VIEW
COM 1 8 7 CLK SHDN OS OUT
CLOCK
CLK
MAX7400 MAX7403 MAX7404 MAX7407
GND
IN 2 COM OS 0.1µF GND 3
VDD 4
MAX7400 MAX7403 MAX7404 MAX7407
SO/DIP
6 5
________________________________________________________________ Maxim Integrated Products
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8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters MAX7400/MAX7403/MAX7404/MAX7407
ABSOLUTE MAXIMUM RATINGS
VDD to GND MAX7400/MAX7403 ....-0.3V to +6V MAX7404/MAX7407 ....-0.3V to +4V IN, OUT, COM, OS, CLK ....-0.3V to (VDD + 0.3V) SHDN......-0.3V to +6V OUT Short-Circuit Duration.........1sec Continuous Power Dissipation (TA = +70°C) SO (derate 5.88mW/°C above +70°C) ..471mW DIP (derate 9.1mW/°C above +70°C) ...727mW Operating Temperature Ranges MAX740_C_A .....0°C to +70°C MAX740_E_A ........-40°C to +85°C Storage Temperature Range .....-65°C to +150°C Lead Temperature (soldering, 10sec) .....+300°C
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 CHARACTERISTICS--MAX7400/MAX7403
(VDD = +5V, filter output measured at OUT, 10k || 50pF load to GND at OUT, SHDN = VDD, OS = COM, 0.1µF from COM to GND, fCLK = 100kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at +25°C.) PARAMETER FILTER CHARACTERISTICS Corner Frequency Clock-to-Corner Ratio Clock-to-Corner Tempco Output Voltage Range Output Offset Voltage DC Insertion Gain with Output Offset Removed Total Harmonic Distortion plus Noise OS Voltage Gain to OUT Input Voltage Range at OS THD+N AOS VOS Input, COM externally driven COM Voltage Range VCOM Output, COM internally biased Input Resistance at COM Clock Feedthrough Resistive Output Load Drive Maximum Capacitive Load at OUT Input Leakage Current at COM Input Leakage Current at OS CLOCK Internal Oscillator Frequency Clock Input Current Clock Input High Clock Input Low fOSC ICLK VIH VIL COSC = 1000pF (Note 4) VCLK = 0 or 5V VDD - 0.5 0.5 29 38 ±15 48 ±30 kHz µA V V RL CL SHDN = GND, VCOM = 0 to VDD VOS = 0 to (VDD - 1V) (Note 3) 10 50 RCOM VDD / 2 - 0.5 VDD / 2 - 0.2 75 VOFFSET VIN = VCOM = VDD / 2 VCOM = VDD / 2 (Note 2) fIN = 200Hz, VIN = 4Vp-p, measurement bandwidth = 22kHz MAX7400 MAX7403 -0.1 0.25 ±5 0.15 -82 -80 1 VCOM ±0.1 VDD / 2 VDD / 2 + 0.5 fC fCLK/fC (Note 1) 0.001 to 10 100:1 10 VDD - 0.25 ±25 0.3 ppm/°C V mV dB dB V/V V kHz SYMBOL CONDITIONS MIN TYP MAX UNITS
VDD / 2 VDD / 2 + 0.2 125 10 1 500 ±0.1 ±0.1 ±10 ±10
V
k mVp-p k pF µA µA
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8th-Order, Lowpass, Elliptic, Switched-Capacitor Filters
ELECTRICAL CHARACTERISTICS--MAX7400/MAX7403 (continued)
(VDD = +5V, filter output measured at OUT, 10k || 50pF load to GND at OUT, SHDN = VDD, OS = COM, 0.1µF from COM to GND, fCLK = 100kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER POWER REQUIREMENTS Supply Voltage Supply Current Shutdown Current Power-Supply Rejection Ratio SHUTDOWN SHDN Input High SHDN Input Low SHDN Input Leakage Current VSDH VSDL V SHDN = 0 to VDD ±0.1 VDD - 0.5 0.5 ±10 V V µA VDD IDD I SHDN PSRR Operating mode, no load, IN = OS = COM SHDN = GND, CLK driven from 0 to VDD Measured at DC 4.5 2 0.2 60 5.5 3.5 1 V mA µA dB SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX7400/MAX7403/MAX7404/MAX7407
ELECTRICAL CHARACTERISTICS--MAX7404/MAX7407
(VDD = +3V, filter output measured at OUT, 10k || 50pF load to GND at OUT, SHDN = VDD, OS = COM, 0.1µF from COM to GND, fCLK = 100kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER FILTER CHARACTERISTICS Corner Frequency Clock-to-Corner Ratio Clock-to-Corner Tempco Output Voltage Range Output Offset Voltage DC Insertion Gain with Output Offset Removed Total Harmonic Distortion plus Noise OS Voltage Gain to OUT Input Voltage Range at OS COM Voltage Range Input Resistance at COM Clock Feedthrough Resistive Output Load Drive Maximum Capacitive Load at OUT Input Leakage Current at COM Input Leakage Current at OS RL CL SHDN = GND, VCOM = 0 to VDD VOS = 0 to (VDD - 1V) (Note 3) 10 50 THD+N AOS VOS VCOM RCOM COM internally biased or externally driven VDD / 2 - 0.1 75 VOFFSET VIN = VCOM = VDD / 2 VCOM = VDD / 2 (Note 2) fIN = 200Hz, VIN = 2.5Vp-p, measurement bandwidth = 22kHz MAX7404 MAX7407 -0.1 0.25 ±5 0.1 -79 -77 1 VCOM ±0.1 VDD / 2 VDD / 2 + 0.1 125 10 1 500 ±0.1 ±0.1 ±10 ±10 fC fCLK/fC (Note 1) 0.001 to 10 100:1 10 VDD - 0.25 ±25 0.3 ppm/°C V mV dB dB V/V V V k mVp-p k pF µA µA kHz SYMBOL CONDITIONS MIN TYP MAX UNITS
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