MAX263, MAX264, MAX267, MAX268 Pin-Programmable Universal and Bandpass Filters - Maxim Integrated Products - #1

Text version of the page

19-0597; Rev 4; 12/07 yn>jxiyn Pin Programmable Universal and Bandpass Filters ___General Description The MAX263/264 and MAX267/268 CMOS switched-capacitor active filters are designed for précision filtering applications. Center frequency, Q, and oper-ating mode are ail selected via pin-strapped inputs. The MAX263/264 uses no external components for a variety of bandpass, lowpass, highpass, notch and allpass filters. The MAX267/268 is dedicated to bandpass applications and includes an uncommitted op-amp. Two second-order filter sections are included in both devices. An input clock and a 5-bit programming input precisely set the filter center/corner frequency. Q is also programmed from 0.5 to 64. Separate clock inputs for each filter half operate with either an external clock or a crystal. The MAX263 and 267 operate with center frequencies up to 57kHz while the MAX264 and 268 extend the fo range to 140kHz by employing lower fcLK/fo ratios. The MAX263/264 is supplied in 28 pin wide DIP and small outline packages while the MAX267/268 is supplied in 24 pin narrow DIP and wide SO packages. AN devices are available in commercial, extended, and military température ranges. Features S S Ci S S 1 00 ♦ 32-Step Center Frequency Control ♦ 128-Step Q Control ♦ Independent Q and f0 Programming ♦ Guaranteed Clock to f0 Ratio—1% (A grade) ♦ 75kHz f0 Range (MAX264/268) ♦ Single +5V and ±5V Opération Ordering Information PART TEMP. RANGE PACKAGE* ACCURACY MAX263ACPI 0°C to +70° C Plastic DIP 1% MAX263BCPI 0°C to +70° C Plastic DIP 2% MAX263AEPI -40°C to +85°C Plastic DIP 1% MAX263BEPI -40°C to +85°C Plastic DIP 2% MAX263ACWI 0°C to +70° C Wide SO 1% MAX263BCWI 0°C to +70° C Wide SO 2% MAX263AMJI -55° C to +125°C CERDIP 1% MAX263BMJI -55° C to +125°C CERDIP 2% MAX264ACPI 0°C to +70° C Plastic DIP 1% MAX264BCPI 0°C to +70° C Plastic DIP 2% Applications Sonar and Avionics Instruments Anti-Aliasing Filters Digital Signal Processing Vibration and Audio Analysis Matched Tracking Filters (Ordering Information continuée! at end of data sheet.) " MAX263/264 packages are 28-pin 0.6" wide DIP and 28-pin 0.3" wide SO (Small Outline). MAX267/268 packages are 24-pin 0.3" narrow DIP and 24-pin 0.3" wide SO (Small Outline). Typical Application Pin Configuration swiyjxiyfi MAX263 TOP VIEWS FILTER A CLK FILTER B (60Hz NOTCH) (120HJ NOTCH) JITL 20kHz MAX267 MAX268 (BANDPASS ONLY) Ml «•» SI ot I« JË>2 __q3 if" 02 mT] OSC OUT IfJOND lil v- __f1 m] 01 "îâloo 5V — V te LOGIC 0 LOGIC MODE 60Hz-120Hz NOTCH FILTER JV\J'YXAJV\___________Maxim Integrated Products 1 Forfree samples & the latest literature: httpj/www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.