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DG406DN-T1-E3 Datasheet(PDF) 11 Page - Vishay Siliconix |
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DG406DN-T1-E3 Datasheet(HTML) 11 Page - Vishay Siliconix |
11 / 12 page Document Number: 70061 S-71009–Rev. I, 14-May-07 www.vishay.com 11 Vishay Siliconix DG406/407 APPLICATIONS HINTS The block diagram shown in Figure 6 illustrates a typical data acquisition front end suitable for low-level analog signals. Differential multiplexing of small signals is preferred since this method helps to reject any common mode noise. This is especially important when the sensors are located at a distance and it may eliminate the need for individual amplifiers. A low rDS(on), low leakage multiplexer like the DG407 helps to reduce measurement errors. The low power dissipation of the DG407 minimizes on-chip thermal gradients which can cause errors due to temperature mismatch along the parasitic thermocouple paths. Please refer to Application Note AN203 for additional information. Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Tech- nology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see http://www.vishay.com/ppg?70061. Figure 6. Measuring low-level analog signals is more accurate when using a differential multiplexing technique. 12-Bit A/D Converter Analog Multiplexer DG407 Controller To Sensor 1 To Sensor 8 Inst Amp S/H |
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