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AD706JR-REEL bảng dữ liệu(PDF) 8 Page - Analog Devices |
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AD706JR-REEL bảng dữ liệu(HTML) 8 Page - Analog Devices |
8 / 12 page REV. E –8– AD706 OUTPUT *WITHOUT THE NETWORK, PINS 1 AND 2, AND 6 AND 7 OF THE AD706 ARE TIED TOGETHER. CAPACITORS C1 AND C2 ARE SOUTHERN ELECTRONICS MPCC, POLYCARB 5%, 50V + – C4 C3 0.1 F +VS OPTIONAL BALANCE RESISTOR NETWORKS* 1/2 AD706 1/2 AD706 INPUT C1 C2 + – R1 1M 0.1 F R2 1M R3 1M R4 1M –VS R5 2M C5 0.01 F 3 2 4 1 5 6 7 8 R6 2M C6 0.01 F Figure 7. 1 Hz, 4-Pole Active Filter 1 Hz, 4-Pole, Active Filter Figure 7 shows the AD706 in an active filter application. An important characteristic of the AD706 is that both the input bias current, input offset current, and their drift remain low over most of the op amp’s rated temperature range. Therefore, for most applications, there is no need to use the normal balancing resistor. Adding the balancing resistor enhances performance at high temperatures, as shown by Figure 8. TEMPERATURE – C 180 –40 0 40 60 120 0 –60 –120 –180 80 120 WITHOUT OPTIONAL BALANCE RESISTOR, R3 WITH OPTIONAL BALANCE RESISTOR, R3 Figure 8. VOS vs. Temperature Performance of the 1 Hz Filter Table II. 1 Hz, 4-Pole, Low Pass Filter Recommended Component Values Section 1 Section 2 Desired Low Frequency Frequency C1 C2 C3 C4 Pass Response (Hz) Q (Hz) Q ( F) ( F) ( F) ( F) Bessel 1.43 0.522 1.60 0.806 0.116 0.107 0.160 0.0616 Butterworth 1.00 0.541 1.00 1.31 0.172 0.147 0.416 0.0609 0.1 dB Chebychev 0.648 0.619 0.948 2.18 0.304 0.198 0.733 0.0385 0.2 dB Chebychev 0.603 0.646 0.941 2.44 0.341 0.204 0.823 0.0347 0.5 dB Chebychev 0.540 0.705 0.932 2.94 0.416 0.209 1.00 0.0290 1.0 dB Chebychev 0.492 0.785 0.925 3.56 0.508 0.206 1.23 0.0242 NOTE Specified Values are for a –3 dB point of 1.0 Hz. For other frequencies simply scale capacitors C1 through C4 directly, i.e. for 3 Hz Bessel response, C1 = 0.0387 µF, C2 = 0.0357 µF, C3 = 0.0533 µF, C4 = 0.0205 µF. |
Số phần tương tự - AD706JR-REEL |
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Mô tả tương tự - AD706JR-REEL |
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