LTC1067/LTC1067-50 Rail-to-Rail, Very Low Noise Universal Dual Filter Building Block FEATURES DESCRIPTION n The LTC 1067/LTC1067-50 consist of two identical rail- Rail-to-Rail Input and Output Operation n to-rail, high accuracy and very wide dynamic range 2nd Operates from a Single 3V to 5V Supply n order switched-capacitor building blocks. Each building Dual 2nd Order Filter in a 16-Lead SSOP Package n block, together with three to five resistors, provides 2nd > 80dB Dynamic Range on Single 3.3V Supply order filter functions such as bandpass, highpass, lowpass, n Clock-to-Center Frequency Ratio of 100:1 for the notch and allpass. High precision 4th order filters are LTC1067 and 50:1 for the LTC1067-50 easily designed. n Internal Sampling-to-Center Frequency Ratio of 200:1 for the LTC1067 and 100:1 for the LTC1067-50 The center frequency of each 2nd order section is tuned by n Center Frequency Error < 0.2% Typ the external clock frequency. The internal clock-to-center n Low Noise: < 40m V , Q 5 frequency ratio (100:1 for the LTC1067 and 50:1 for the RMS n Customizable with Internal Resistors LTC1067-50) can be modified by the external resistors. These devices have a double sampled architecture which U places aliasing and imaging components at twice the clock APPLICATIONS frequency. The LTC1067-50 is a low power device con- n Notch Filters suming about one half the current of the LTC1067. The n Narrowband Bandpass Filters LTC1067-50s typical supply current is about 1mA from a n Tone Detection 3.3V supply. n Noise Reduction Systems The LTC1067 and LTC1067-50 are available in 16-pin narrow SSOP and SO packages. Mask programmable versions of the LTC1067 and LTC1067-50, with thin film resistors on-chip and custom clock-to-cutoff frequency ratios, can be designed in an SO-8 package to realize application specific monolithic , LTC and LT are registered trademarks of Linear Technology Corporation. filters. Please contact LTC Marketing for more details. TYPICAL APPLICATION Frequency Response Single 3.3V Supply Rail-to-Rail, 4th Order, 10kHz Bandpass Filter 0 1 16 + V CLK f = 500kHz CLK 2 15 10 NC AGND 1m F 3 14 + 3.3V V V 4 13 0.1m F SA SB 20 LTC1067-50 5 12 LPA LPB OUT R32, 200k R31, 200k 6 11 BPA BPB 30 R21, 10k R22, 10k 7 10 HPA/NA HPB/NB R11 200k 8 9 IN INV A INV B 40 10 8 9 11 12 TOTAL OUTPUT NOISE: 90V RMS RB1, 200k FREQUENCY (kHz) S/N RATIO: 80dB 1067 TA01 1067 TA02 1 GAIN (dB) U ULTC1067/LTC1067-50 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION + Total Voltage Supply (V to V ) .............................. 12V TOP VIEW ORDER PART + Input Voltage ........................ (V + 0.3V) to (V 0.3V) + NUMBER V 1 16 CLK Output Short-Circuit Duration .......................... Indefinite NC 2 15 AGND LTC1067CGN Power Dissipation............................................... 500mV + V 3 14 V LTC1067-50CGN Operating Temperature Range SA 4 13 SB LTC1067IGN LTC1067C ............................................... 0 C to 70 C LPA 5 12 LPB LTC1067-50IGN LTC1067I............................................ 40 C to 85 C BPA 6 11 BPB LTC1067CS Storage Temperature Range ................. 65 C to 150 C HPA/NA 7 10 HPB/NB LTC1067-50CS INV A 8 9 INV B Lead Temperature (Soldering, 10 sec).................. 300 C LTC1067IS GN PACKAGE S PACKAGE LTC1067-50IS 16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO T = 110 C, q = 135 C/ W (GN) JMAX JA T = 110 C, q = 115 C/ W (S) JMAX JA Consult factory for Military grade parts. ELECTRICAL CHARACTERISTICS LTC1067 (internal op amps) V = 4.75V, T = 25 C, unless otherwise noted. S A PARAMETER CONDITIONS MIN TYP MAX UNITS Operating Supply Range 311 V Positive Output Voltage Swing V = 3V, R = 10k l 2.65 2.80 V S L V = 4.75V, R = 10k l 4.25 4.50 V S L V = 5V, R = 10k l 4.15 4.50 V S L Negative Output Voltage Swing V = 3V, R = 10k l 0.020 0.200 V S L V = 4.75V, R = 10k l 0.025 0.225 V S L V = 5V, R = 10k l 4.96 4.80 V S L Output Short-Circuit Current V = 3V 16/1.0 mA S (Source/Sink) V = 4.75V 33/2.2 mA S V = 5V 70/7.2 mA S DC Open-Loop Gain R = 10k 90 dB L GBW Product R = 10k 2.8 MHz L Slew Rate R = 10k 2.25 V/m s L LTC1067 (complete filter) V = 4.75V, f = 250kHz, T = 25 C, unless otherwise noted. S CLK A PARAMETER CONDITIONS MIN TYP MAX UNITS Center Frequency Range, f (Note 1) 0.001 to 20 kHz O Input Frequency Range 0 to 1 MHz Clock-to-Center Frequency, f /f V = 3V, f = 250kHz, Mode 1, f = 2.5kHz, Q = 5 100:1 0.2 % CLK O S CLK O R1 = R3 = 49.9k, R2 = 10k l 0.70 % V = 4.75V, f = 250kHz, Mode 1, f = 2.5kHz, Q = 5 100:1 0.2 % S CLK O R1 = R3 = 49.9k, R2 = 10k l 0.70 % V = 5V, f = 500kHz, Mode 1, f = 5kHz, Q = 5 100:1 0.2 % S CLK O R1 = R3 = 49.9k, R2 = 10k l 0.70 % Clock-to-Center Frequency Ratio, V = 3V, f = 250kHz, Q = 5 l 0.1 0.35 % S CLK Side-to-Side Matching V = 4.75V, f = 250kHz, Q = 5 l 0.1 0.35 % S CLK V = 5V, f = 500kHz, Q = 5 l 0.1 0.35 % S CLK 2 U W U W U WW