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CS5451 Fiches technique(PDF) 7 Page - List of Unclassifed Manufacturers |
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CS5451 Fiches technique(HTML) 7 Page - List of Unclassifed Manufacturers |
7 / 14 page CS5451 DS458PP4 7 2. GENERAL DESCRIPTION The CS5451 is designed for 3-phase power meter applications and interfaces to a current transform- ers or shunt to measure current, and a resistive di- vider or transformer to measure voltage. The CS5451 combines six ∆Σ modulators and dec- imation filters, three channels assigned for current input that have programmable input gain amplifi- ers, and three channels assigned for voltage input. The CS5451 includes six decimation filters that output data at a 2000 Hz or 4000 Hz output word rate (OWR) when the input frequency at XIN = 4.096 MHz. The device outputs data on a serial output port. 2.1 Theory of Operation The CS5451 is designed to operate from a single +3V supply and provides a ±40 mV and ±800 mV input range for the current channels and ±800 mV range for the voltage channels. These voltages rep- resent the maximum zero-to-peak voltage levels that can be presented to the inputs. The CS5451 is designed to accommodate common mode + signal levels from VA- to VA+. Figure 2 illustrates the CS5451 typical inputs and power supply connec- tions. VA+ VD+ VIN1+, VIN2+, or VIN3+ VIN1-, VIN2-, or VIN3- IIN1+, IIN2+, or IIN3+ IIN1-, IIN2-, or IIN3- AGND DGND REFIN REFOUT Optional External Reference V PHASE + I -2 V PHASE VA- +3 V 1.2 V NOTE: Current input channels actually measure voltage. Figure 2. Typical Connection Diagram |
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