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CS5451A-ISZ 데이터시트(PDF) 1 Page - Cirrus Logic |
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1 / 14 page Copyright Cirrus Logic, Inc. 2010 (All Rights Reserved) http://www.cirrus.com CS5451A Six-channel, Delta-sigma Analog-to-digital Converter Features • Synchronous Sampling • On-chip 1.2 V Reference (25 ppm/°C typ.) • Power Supply Configurations: - VA+ = +3 V; VA- = -2 V; VD+ = +3 V - Supply Tolerances: ±10% • Power Consumption - 23 mW Typical at VD+ = +3 V • Simple Four-wire Serial Interface • Charge pump driver output generates negative power supply. • Ground-referenced Bipolar Inputs Description The CS5451A is a highly integrated delta-sigma ( ΔΣ) an- alog-to-digital converter (ADC) developed for the power measurement industry. The CS5451A combines six ΔΣ ADCs, decimation filters, and a serial interface on a sin- gle chip. The CS5451A interfaces directly to a current transformer or shunt to measure current, and to a resis- tive divider or transformer to measure voltage. The product features a serial interface for communication with a microcontroller or DSP. The product is initialized and fully functional upon reset, and includes a voltage reference. ORDERING INFORMATION: See page 13. VREFIN VREFOUT IIN1+ IIN1- VIN1+ VIN1- VIN2+ VIN2- VIN3+ VIN3- IIN2+ IIN2- IIN3+ IIN3- VA+ VD+ AGND SE FSO SDO SCLK Voltage Reference Serial Interface RESET Decimation Filter Decimation Filter Decimation Filter Decimation Filter Decimation Filter Decimation Filter x1, 20 x1 4th Order ΔΣ Modulator x1 x1, 20 x1 x1, 20 x1 4th Order ΔΣ Modulator 4th Order ΔΣ Modulator 4th Order ΔΣ Modulator 4th Order ΔΣ Modulator 4th Order ΔΣ Modulator GAIN CPD OWRS XIN DGND VA- Clock Pulse Output Regulator FEB ‘10 DS635F3 |
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