MAX260/MAX261/MAX262 19-0352 Rev 2 7/02 Microprocessor Programmable Universal Active Filters General Description Features The MAX260/MAX261/MAX262 CMOS dual second- Filter Design Software Available order universal switched-capacitor active filters allow Microprocessor Interface microprocessor control of precise filter functions. No external components are required for a variety of band- 64-Step Center Frequency Control pass, lowpass, highpass, notch, and allpass configura- 128-Step Q Control tions. Each device contains two second-order filter sections that place center frequency, Q, and filter oper- Independent Q and f Programming 0 ating mode under programmed control. Guaranteed Clock to f Ratio-1% (A grade) 0 An input clock, along with a 6-bit f program input, 0 determine the filter s center or corner frequency without 75kHz f Range (MAX262) 0 affecting other filter parameters. The filter Q is also pro- Single +5V and 5V Operation grammed independently. Separate clock inputs for each filter section operate with either a crystal, RC net- work, or external clock generator. Ordering Information The MAX260 has offset and DC specifications superior PART TEMP RANGE PACKAGE A C C U R A C Y to the MAX261 and MAX262 and a center frequency (f ) range of 7.5kHz. The MAX261 handles center fre- MAX260ACNG 0C to +70C Plastic DIP 1% 0 quencies to 57kHz, while the MAX262 extends the cen- MAX260BCNG 0C to +70C Plastic DIP 2% ter frequency range to 140kHz by employing lower MAX260AENG -40C to +85C Plastic DIP 1% clock-to-f ratios. All devices are available in 24-pin DIP 0 MAX260BENG -40C to +85C Plastic DIP 2% and small outline packages in commercial, extended, MAX260ACWG 0C to +70C Wide SO 1% and military temperature ranges. MAX260BCWG 0C to +70C Wide SO 2% Applications MAX260AMRG -55C to +125C CERDIP 1% P-Tuned Filters MAX260BMRG -55C to +125C CERDIP 2% Anti-Aliasing Filters *All devices24-pin packages 0.3in-wide packages Digital Signal Processing Ordering Information continued at end of data sheet. Adaptive Filters Signal Analysis Pin Configurations Phase-Locked Loops TOP VIEW Functional Diagram BP 1 24 LP BP 1 24 LP A A A A INPUT OUTPUT N.C. 2 23 IN OP OUT 2 23 IN B B IN LP HP BP IN LP HP BP HP 3 22 LP HP 3 22 LP A B A B N.C. 4 21 BP OP IN 4 21 BP B B FILTER FILTER + +5V V MAX260 MAX261 A B IN 5 20 D0 IN 5 20 HP A A B MAX262 D1 6 19 OSC OUT D1 6 19 D0 A3 7 18 GND A3 7 18 OSC OUT GND - CLK OUT 8 17 V CLK OUT 8 17 GND - + + V V 9 16 WR V 9 16 MAX260 - A2 10 15 A0 A2 10 15 WR MAX261 -5V V MAX262 CLK 11 14 HP CLK 11 14 A0 A B A OSC CLKOUT CLK CLK B A CLK 12 13 A1 CLK 12 13 A1 B B PROGRAM INPUTS CRYSTAL FOURTH-ORDER BANDPASS FILTER Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Microprocessor Programmable Universal Active Filters ABSOLUTE MAXIMUM RATINGS + - Total Supply Voltage (V to V ) .............................................15V Operating Temperature Ranges - + Input Voltage, any pin ..........................(V - 0.3V) to (V + 0.3V) MAX260/MAX261/MAX262XCXG .......................0C to +70C Input Current, any pin ......................................................50mA MAX260/MAX261/MAX262XEXG .....................-40C to +85C Power Dissipation MAX260/MAX261/MAX262XMXG ..................-55C to +125C Plastic DIP (derate 8.33mW/C above 70C) ...............660mW Storage Temperature Range .............................-65C to +160C CERDIP (derate 12.5mW/C above 70C) .................1000mW Lead Temperature (Soldering, 10s) ................................+300C Wide SO (derate 11.8mW/C above 70C) ..................944mW 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 + - (V = +5V, V = -5V, CLK = CLK = 5V 350kHz for the MAX260 and 1.5MHz for the MAX261/MAX262, f /f = 199.49 for A B CLK 0 MAX260/MAX261 and 139.80 for MAX262, Filter Mode 1, T = +25C, unless otherwise noted.) A PARAMETER CONDITIONS MIN TYP MAX UNITS f Center Frequency Range See Table 1 0 Maximum Clock Frequency See Table 1 MAX260A 0.2 1.0 MAX260B 0.2 2.0 f /f Ratio Error (Note 1) T = T to T % CLK 0 A MIN MAX MAX261/MAX262A 0.2 1.0 MAX261/MAX262B 0.2 2.0 f Temperature Coefficient -5 ppm/C 0 Q = 8 MAX260A 1 6 Q = 8 MAX260B 1 10 Q = 32 MAX260A 2 10 Q = 32 MAX260B 2 15 Q = 64 MAX260A 4 20 Q = 64 MAX260B 4 25 Q Accuracy (deviation from ideal T = T to A MIN % T continuous filter) (Note 2) MAX Q = 8 MAX261/MAX262A 1 6 Q = 8 MAX261/MAX262B 1 10 Q = 32 MAX261/MAX262A 2 10 Q = 32 MAX261/MAX262B 2 15 Q = 64 MAX261/MAX262A 4 20 Q = 64 MAX261/MAX262B 4 25 Q Temperature Coefficient 20 ppm/C MAX260 0.1 0.3 DC Lowpass Gain Accuracy dB MAX261/MAX262 0.1 0.5 MAX260 -5 Lowpass (at D.C.) Gain Temperature Coefficient MAX261/MAX262 -5 ppm/C Bandpass (at f ) 0 MAX260/MAX261/MAX262 +20 2 MAX260/MAX261/MAX262