Details, datasheet, quote on part number: MAX261AC
CategoryAnalog & Mixed-Signal Processing => Filters
DescriptionP Programmable, Universal Switched Capacitor Filter
CompanyMaxim Integrated Products
DatasheetDownload MAX261AC datasheet


Features, Applications

The MAX260/MAX261/MAX262 CMOS dual secondorder universal switched-capacitor active filters allow microprocessor control of precise filter functions. No external components are required for a variety of bandpass, lowpass, highpass, notch, and allpass configurations. Each device contains two second-order filter sections that place center frequency, Q, and filter operating mode under programmed control. An input clock, along with 6-bit f0 program input, determine the filter's center or corner frequency without affecting other filter parameters. The filter Q is also programmed independently. Separate clock inputs for each filter section operate with either a crystal, RC network, or external clock generator. The MAX260 has offset and DC specifications superior to the MAX261 and MAX262 and a center frequency (f0) range of 7.5kHz. The MAX261 handles center frequencies to 57kHz, while the MAX262 extends the center frequency range 140kHz by employing lower clock-to-f0 ratios. All devices are available in 24-pin DIP and small outline packages in commercial, extended, and military temperature ranges. o Filter Design Software Available o Microprocessor Interface o 64-Step Center Frequency Control 128-Step Q Control o Independent Q and f0 Programming o Guaranteed Clock Ratio-1% (A grade) 75kHz f0 Range (MAX262) o Single +5V and 5V Operation




P-Tuned Filters Anti-Aliasing Filters Digital Signal Processing Adaptive Filters Signal Analysis Phase-Locked Loops

*All devices--24-pin packages 0.3in-wide packages Ordering Information continued at end of data sheet.


For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, or visit Maxim's website at

Total Supply Voltage (V+ to V-).............................................15V Input Voltage, any pin..........................(V- 0.3V) to (V+ + 0.3V) Input Current, any pin......................................................50mA Power Dissipation Plastic DIP (derate 8.33mW/C above 70C)...............660mW CERDIP (derate 12.5mW/C above 70C).................1000mW Wide SO (derate 11.8mW/C above 70C)..................944mW Operating Temperature Ranges to +125C Storage Temperature to +160C Lead Temperature (Soldering, 10s)................................+300C

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.

(V+ = -5V, CLKA = CLKB 5V 350kHz for the MAX260 and 1.5MHz for the = 199.49 for MAX260/MAX261 and 139.80 for MAX262, Filter Mode = +25C, unless otherwise noted.)

PARAMETER f0 Center Frequency Range Maximum Clock Frequency MAX260A fCLK/f0 Ratio Error (Note TA = TMIN to TMAX MAX261/MAX262B f0 Temperature Coefficient 64 Q Accuracy (deviation from ideal continuous filter) (Note TA = TMIN to TMAX 64 Q Temperature Coefficient DC Lowpass Gain Accuracy Lowpass (at D.C.) Bandpass (at MAX261/MAX262 MAX260 Gain Temperature Coefficient MAX261/MAX262A MAX261/MAX262B CONDITIONS MIN TYP See Table 1 See Table ppm/C 0.5 dB ppm/C % MAX UNITS

(V+ = -5V, CLKA = CLKB 5V 350kHz for the MAX260 and 1.5MHz for the = 199.49 for MAX260/MAX261 and 139.80 for MAX262, Filter Mode = +25C, unless otherwise noted.)

PARAMETER CONDITIONS TA = TMIN to TMAX, = 4 Mode MAX261B MAX262A Offset Voltage At Filter Outputs--LP, BP, HP (Note MAX260A MAX260B Mode MAX262A MAX262B Offset Voltage Temperature Coefficient Clock Feedthrough Crosstalk 1, 2nd-Order, LP/BP Wideband Noise Harmonic Distortion at f0 Supply Voltage Range Power Supply Current (Note 4th-Order LP (Figure 4th-Order BP (Figure 24) (Note = 4, VIN TA = TMIN to TMAX TA = TMIN to TMAX CMOS Level Logic Inputs MAX261 MAX262 Shutdown Supply Current INTERNAL AMPLIFIERS Output Signal Swing Output Signal Circuit Current Power Supply Rejection Ratio Gain Bandwidth Product Slew Rate TA = TMIN to TMAX, 10k load (Note 6) Source Sink mA dB MHz V/s Q6A = all 0, CMOS Level Logic Inputs (Note TA = TMIN to TMAX MIN TYP See Typ. Oper. Char. dB V VRMS MAX mV/C dB V UNITS


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