LTC1061 LINER [Linear Technology], LTC1061 Datasheet
LTC1061
Available stocks
Related parts for LTC1061
LTC1061 Summary of contents
Page 1
... For above, the center frequency ranges from 0.1Hz to 28kHz. The LTC1061 can be used with single or dual supplies ranging from 2.37V to 8V (or 4.74V to 16V). When the filter operates with supplies of 5V and above, it can handle input frequencies up to 100kHz ...
Page 2
... LTC1061 BSOLUTE Supply Voltage ....................................................... 18V Power Dissipation............................................. 500mW Operating Temperature Range LTC1061AC, LTC1061C ............ – LTC1061AM, LTC1061M ......... – Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec.)................ 300 C ELECTRICAL C HARA TERISTICS C (Complete Filter ...
Page 3
... Filter PARAMETER DC Offset Voltage V , Figure 23 OS1 V OS2 V OS2 V , LTC1061CN, ACN/LTC1061CS OS3 V , LTC1061CN, ACN/LTC1061CS OS3 Clock Feedthrough Maximum Clock Frequency Power Supply Current (Complete Filter)V = 2.37V unless otherwise specified Center Frequency Range Input Frequency Range ...
Page 4
... MODE 100 POWER SUPPLY VOLTAGE (±V) 1061 G08 /f ) CLK O = 500:1 = 200:1 10 100 LTC1061 G03 V = ±7. 2.5 Q ±5V S 2.5 Q 1061 G06 = –55° 25° 125° 1061 G09 ...
Page 5
... Pin 6. AGND (Pin 6) When the LTC1061 operates with dual supplies, Pin 6 should be tied to system ground. When the LTC1061 operates with a single positive supply, the analog ground pin should be tied to 1/2 supply, Figure 1. The positive input of all the internal op amps, as well as the common reference of all the internal switches, are internally tied to the analog ground pin. Because of this, a “ ...
Page 6
... OUT This is defined as the amplitude of the clock frequency 20 appearing at the output pins of the device, Figure 2. Clock R3 19 feedthrough is measured with all three sides of the LTC1061 R2 18 connected as filters. The clock feedthrough mainly de- 17 pends on the magnitude of the power supplies and it is ...
Page 7
... In Mode 3, this ratio can be adjusted above or below 50:1 or 100:1. The side C of the LTC1061 can be connected only in Mode 3. Figure 3 illustrates Mode 1 providing 2nd order notch, lowpass, and bandpass outputs (for definition of filter functions, refer to the LTC1060 data sheet) ...
Page 8
... IN RMS = 0.969 3.4, F speed in mind. The higher (Q3 and placed in the side B of the LTC1061. The remaining two center frequencies were then normalized with respect to the center frequency of side B; this changes the ratio of clock-to-cutoff frequency from 50 1.17 = 58.5:1. As shown in Figure 9, the maximum cutoff frequency is about 33kHz ...
Page 9
... The cascading sequence of this 6th order bandpass filter is shown in block diagram form, Figure 10a. the filter is geometrically centered around the side B of the LTC1061 connected in Mode 1. This dictates a clock-to-center frequency ratio of 50:1 or 100:1. The side A of the IC operates in Mode 1b to provide the lower center frequency of 0 ...
Page 10
... – V sized. Literature describing elliptic double terminated (RLC) R41 R31 R21 –10 R11 –20 LTC1061 F12 –30 –40 – ±5V – CLK –70 1.0 Figure 13. Resistor Values and Amplitude Response of Figure 12 Topology. The Notch is Centered at 2600Hz ...
Page 11
... LTC1061 operates in Mode 1 with a center frequency very close to the overall cutoff frequency of the lowpass filter. In Figure 16, all three sides of the LTC1061 are connected in Mode 3a. This topology is useful for elliptic highpass and notch filters with clock-to-cutoff (or notch) frequency ratio higher than 100:1 ...
Page 12
... LTC1061. The lowpass filter, however, does not lose its passband accu- racy and it maintains nearly all of its attenuation slope. The theoretical performance of the 7th order lowpass filter of Figure ...
Page 13
... T L, CMOS CLOCK INPUT Figure 21. LTC1061 with Side A is Connected in Mode 2 While Side B, C are in Mode 3a. Topology is Useful for Elliptic Highpass, Notch and Bandpass Filters. 0 –10 –20 –30 –40 –50 –60 –70 –80 – ...
Page 14
... V OS1 + 6 Figure 23. Equivalent Input Offsets of 1/3 LTC1061 Filter Building Block. V OSN MODE PIN 3 (18 [(1/ ||] – V OS1 OLP 1b V [(1/ R2/R1] – V OS1 R2/R1 + R2/R3 + R2/R4) – V OS1 [R4/( [R2/(R2 + R4)] OS2 3 V OS2 14 U Table 3. Wideband RMS Noise ...
Page 15
... S Package 20-Lead Plastic SOL 0.037 – 0.045 (0.940 – 1.143) 0.050 0.004 – 0.012 (1.270) (0.102 – 0.305) TYP 0.014 – 0.019 (0.356 – 0.482) TYP LTC1061 1.060 (26.924) MAX 0.025 (0.635) RAD TYP ...
Page 16
... LTC1061 NORTHEAST REGION Linear Technology Corporation One Oxford Valley 2300 E. Lincoln Hwy.,Suite 306 Langhorne, PA 19047 Phone: (215) 757-8578 FAX: (215) 757-5631 Linear Technology Corporation 266 Lowell St., Suite B-8 Wilmington, MA 01887 Phone: (508) 658-3881 FAX: (508) 658-2701 FRANCE Linear Technology S.A.R.L. Immeuble "Le Quartz" ...