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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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INA2321 датащи(PDF) 14 Page - Texas Instruments |
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INA2321 датащи(HTML) 14 Page - Texas Instruments |
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14 / 25 page  INA321 INA2321 SBOS168D − DECEMBER 2000 − REVISED JANUARY 2006 www.ti.com 14 APPLICATION CIRCUITS Medical ECG Applications Figure 9 shows the INA321 configured to serve as a low-cost ECG amplifier, suitable for moderate accuracy heart-rate applications such as fitness equipment. The input signals are obtained from the left and right arms of the patient. The common-mode voltage is set by two 2M Ω resistors. This potential, through a buffer, provides an optional right leg drive. Filtering can be modified to suit application needs by changing the capacitor value of the output filter. Low-Power, Single-Supply Data Acquisition Systems Refer to Figure 5 to see the INA321 configured to drive an ADS7818. Functioning at frequencies of up to 500kHz, the INA321 is ideal for low-power data acquisition. OPA336 OPA336 OPA336 Right Arm Left Arm OPA336 1M Ω REF 1M Ω 1M Ω 10k Ω 10k Ω Shield Drive 390k Ω 10k Ω 2k Ω 2k Ω 1.6nF 0.1 µF 100k Ω 100k Ω Shield +5V VR V R VR =+2.5V 2M Ω 2M Ω Right Leg V R INA321 5 3 2 8 7 6 4 1 V+ Shutdown RG V IN− V − VIN+ V OUT PUT 100k Ω Figure 9. Simplified ECG Circuit for Medical Applications |
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