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CS5461A Scheda tecnica(PDF) 5 Page - Cirrus Logic |
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CS5461A Scheda tecnica(HTML) 5 Page - Cirrus Logic |
5 / 44 page CS5461A DS661F2 5 1. OVERVIEW The CS5461A is a CMOS monolithic power measurement device with a computation engine and an en- ergy-to-frequency pulse output. The CS5461A combines a programmable-gain amplifier, two ∆Σ ana- log-to-digital converters (ADCs), system calibration and a computation engine on a single chip. The CS5461A is designed for power measurement applications and is optimized to interface to a cur- rent-sense resistor or transformer for current measurement, and to a resistive divider or potential trans- former for voltage measurement. The voltage and current channels provide programmable gains to accommodate various input levels from a wide variety of sensing elements. With single +5 V supply on VA+/AGND, both of the CS5461A’s input channels can accommodate common mode as well as signal levels between (AGND - 0.25 V) and VA+. Additionally, the CS5461A is equipped with a computation engine that calculates IRMS, VRMS, apparent power and active (real) power. To facilitate communication to a microprocessor, the CS5461A includes a simple three-wire serial interface which is SPI™ and Microwire™ compatible. The CS5461A provides three outputs for energy registration. E1 and E2 are designed to directly drive a mechanical counter or stepper motor, or interface to a microprocessor. The pulse output E3 is designed to assist with meter cal- ibration. |
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