PDF CS5467 Data sheet ( Hoja de datos )

Número de pieza	CS5467
Descripción	Four-channel Power/Energy IC
Fabricantes	Cirrus Logic
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No Preview Available ! www.DataSheet4U.com ADVANCE RELEASE CS5467 Four-channel Power/Energy IC Features • Energy Data Linearity: ±0.1% of Reading over 1000:1 Dynamic Range • On-chip Functions: - Instantaneous Voltage, Current, and Power - IRMS and VRMS, Active, Reactive, and Apparent Power - Current Fault and Voltage Sag Detect - System Calibrations / Phase Compensation - Temperature Sensor - Energy-to-pulse Conversion - Positive-only Accumulation Mode • Meets Accuracy Spec for IEC, ANSI, & JIS • Low Power Consumption • GND-referenced Signals with Single Supply • On-chip, 2.5 V Reference • Power Supply Monitor • Simple Three-wire Digital Serial Interface • “Auto-boot” Mode from Serial E2PROM. • Power Supply Configurations VA+ = +5 V; AGND = 0 V; VD+ = +3.3 V to +5 V Description The CS5467 is an integrated power measure- ment device which combines four ∆Σ analog-to-digital converters, power calculation engine, energy-to-frequency converter, and a serial interface on a single chip. It is designed to accurately measure instantaneous current and voltage and calculate VRMS, IRMS, instantaneous power, active power, apparent power, and reac- tive power for high-performance power measurement applications. The CS5467 is optimized to interface to shunt re- sistors or current transformers for current measurement, and to resistive dividers or poten- tial transformers for voltage measurement. The CS5467 also features system-level calibra- tion, a temperature sensor, voltage sag & current fault detection, and phase compensation. ORDERING INFORMATION: See Page 45. VA+ RESET VD+ IIN1+ IIN1- PGA VIN1+ VIIN1- x10 IIN2+ IIN2- PGA 4th Order ∆Σ Modulator Digital Filter HPF Option 2nd Order ∆Σ Modulator Digital Filter HPF Option 4th Order ∆Σ Modulator Digital Filter HPF Option Power Calculation Engine Serial Interface E-to-F MODE CS SDI SDO SCLK INT E1 E2 E3 VIN2+ VIN2- VREFIN VREFOUT x10 x1 Voltage Reference AGND 2nd Order ∆Σ Modulator Digital Filter HPF Option Calibration Power Monitor PFMON Temperature Sensor System Clock /K Clock Generator XIN XOUT CPUCLK DGND Advance Product Information This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice. http://www.cirrus.com Copyright © Cirrus Logic, Inc. 2006 (All Rights Reserved) MAR ‘06 DS714A1 1 page ADVANCE RELEASE CS5467 1. OVERVIEW The CS5467 is a CMOS monolithic power measurement device with a computation engine and an ener- gy-to-frequency pulse output. The CS5467 combines four ∆Σ analog-to-digital converters (ADCs), system calibration, and a computation engine on a single chip. The CS5467 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 current channels provide programmable gains to accommodate various input levels from a multitude of sensing elements. With a single +5 V supply on VA+/AGND, the CS5467’s four input channels can accommodate common mode plus signal levels between (AGND - 0.25 V) and VA+. The CS5467 also is equipped with a computation engine that calculates instantaneous power, IRMS, VRMS, apparent power, active (real) power, reactive power, and power factor. Additional features of the CS5467 include line frequency monitoring, current and voltage sag detection, zero-cross detection, pos- itive-only accumulation mode, and three programmable pulse output pins. To facilitate communication to a microprocessor, the CS5467 includes a simple three-wire serial interface which is SPI™ and Microw- ire™ compatible. The CS5467 provides three outputs for energy registration. Pins E1, E2, and E3 are de- signed to interface to a microprocessor. DS714A1 5 5 Page ADVANCE RELEASE CS5467 SWITCHING CHARACTERISTICS • Min / Max characteristics and specifications are guaranteed over all Recommended Operating Conditions. • Typical characteristics and specifications are measured at nominal supply voltages and TA = 25 °C. • VA+ = 5 V ±5% VD+ = 3.3 V ±5% or 5 V ±5%; AGND = DGND = 0 V. All voltages with respect to 0 V. • Logic Levels: Logic 0 = 0 V, Logic 1 = VD+. Parameter Symbol Min Typ Max Unit Rise Times (Note 17) trise - - 1.0 µs Any Digital Output - 50 - ns Fall Times (Note 17) Any Digital Output tfall - - 1.0 µs - 50 - ns Start-up Oscillator Start-up Time XTAL = 4.096 MHz (Note 18) tost - 60 - ms Serial Port Timing Serial Clock Frequency SCLK - - 2 MHz Serial Clock Pulse Width High Pulse Width Low t1 t2 200 - 200 - - ns - ns SDI Timing CS Falling to SCLK Rising t3 50 - - ns Data Set-up Time Prior to SCLK Rising t4 50 - - ns Data Hold Time After SCLK Rising t5 100 - - ns SDO Timing CS Falling to SDO Driving t6 - 20 50 ns SCLK Falling to New Data Bit (hold time) t7 - 20 50 ns CS Rising to SDO Hi-Z t8 - 20 50 ns Auto-Boot Timing Serial Clock Pulse Width Low Pulse Width High t9 t10 8 MCLK 8 MCLK MODE setup time to RESET Rising t11 50 ns RESET rising to CS falling t12 48 MCLK CS falling to SCLK rising t13 100 8 MCLK SCLK falling to CS rising t14 16 MCLK CS rising to driving MODE low (to end auto-boot sequence) t15 50 ns SDO guaranteed setup time to SCLK rising t16 100 Notes: 17. Specified using 10% and 90% points on waveform of interest. Output loaded with 50 pF. ns 18. Oscillator start-up time varies with crystal parameters. This specification does not apply when using an external clock source. DS714A1 11 11 Page

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