ADI公司的ADE51xx 和ADE55xx是单片单相电表集成电路,它集成了已验证过的能量测量内核,8051微控制器,LCD驱动器,全硬件的RTC,两个UART以及智能的电池管理.单片SOC可替代6个单独的IC,此外还能维持精确的时间,感知到温度变化,LCD读出,以及其它关键的系统功能.在电池模式电流消耗仅为1.5微安.本文介绍了ADE51xx 和ADE55xx的通用特性和微处理器的特性,以及ADE5566/ADE5569功能方框图, ADE5166/ADE5169功能方框图, ADE5166与ADE5169电表方框图和ADC和信号处理框图.
ANALOG DEVICES EXPANDS ENERGY METERING PORTFOLIO TO ADDRESS ADVANCED, EMERGING MONITORING APPLICATIONS
ADE51xx and ADE55xx system-on-chip energy metering solutions increase RAM and program memory to serve more demanding global metering communications protocols
The ADE5166/ADE5169/ADE5566/ADE55691 integrate Analog Devices, Inc., energy (ADE) metering IC analog front end and fixed function DSP solution with an enhanced 8052 MCU core, a full RTC, an LCD driver, and all the peripherals to make an electronic energy meter with an LCD display in a single part. The ADE measurement core includes active, reactive, and apparent energy calculations, as well as voltage and current rms measure- ments. This information is ready to use for energy billing by using built-in energy scalars. Many power line supervisory features such as SAG, peak, and zero crossing are included in the energy measurement DSP to simplify energy meter design. The microprocessor functionality includes a single-cycle 8052 core, a full real-time clock with a power supply backup pin, two independent UART interfaces, and an SPI or I2C® interface. The ready-to-use information from the ADE core reduces the program memory size requirement, making it easy to integrate complicated design into 62 kB of flash memory. The ADE5166/ADE5169/ADE5566/ADE5569 also include a 108-/104-segment LCD driver with the capability to store up to 4 LCD screens in memory. This driver generates voltages capable of driving LCDs up to 5 V.
通用特性:
Wide supply voltage operation: 2.4 V to 3.7 V
Internal bipolar switch between regulated and battery inputs
Ultralow power operation with power saving modes (PSM)
Full operation: 4 mA to 1.6 mA (PLL clock dependent)
Battery mode: 3.2 mA to 400 μA (PLL clock dependent)
Sleep mode
Real-time clock (RTC) mode: 1.5 μA
RTC and LCD mode: 27 μA (LCD charge pump enabled)
Reference: 1.2 V ± 0.1% (10 ppm/°C drift)
64-lead RoHS package options Low profile quad flat package (LQFP)
Operating temperature range: −40°C to +85°C
ENERGY MEASUREMENT FEATURES
Proprietary analog-to-digital converters (ADCs) and digital signal processing (DSP) provide high accuracy active (WATT), reactive (VAR), and apparent energy (VA) measurement
Less than 0.1% error on active energy over a dynamic range of 1000 to 1 @ 25°C
Less than 0.5% error on reactive energy over a dynamic range of 1000 to 1 @ 25°C (ADE5569 and ADE5169 only)
Less than 0.5% error on root mean square (rms) measurements over a dynamic range of 500 to 1 for current (Irms) and 100 to 1 for voltage (Vrms) @ 25°C
Supports IEC 62053-21, IEC 62053-22, IEC 62053-23, EN 50470-3 Class A, Class B, and Class C, and ANSI C12-16
Differential input with programmable gain amplifiers (PGAs) supports shunts, current transformers, and di/dt current sensors (ADE5569 and ADE5169 only)
Two current inputs for antitamper detection in the ADE5166/ADE5169
High frequency outputs proportional to Irms, active, reactive, or apparent power (AP)
微处理器特性:
8052-based core
Single-cycle 4 MIPS
8052 core 8052-compatible instruction set
32.768 kHz external crystal with on-chip PLL
Two external interrupt sources
External reset pin
Low power battery mode
Wake-up from I/O, temperature change, alarm, and universal asynchronous receiver/transmitter (UART)
LCD driver operation with automatic scrolling
Temperature measurement
Real-time clock
Counter for seconds, minutes, hours, days, months, and years
Date counter including leap year compensation Automatic battery switchover for RTC backup Operation down to 2.4 V
Ultralow battery supply current: 1.5 μA Selectable output frequency: 1 Hz to 16.384 kHz
Embedded digital crystal frequency compensation for calibration and temperature variation 2 ppm resolution
Integrated LCD driver
108-segment driver for the ADE5566/ADE5569 and 104-segment driver for the ADE5166/ADE5169
2×, 3×, or 4× multiplexing
Four LCD memory banks for screen scrolling
LCD voltages generated internally or with external resistors Internal adjustable drive voltages up to 5 V independent of power supply level
On-chip peripherals
Two independent UART interfaces
SPI or I2C
Watchdog timer
Power supply management with user-selectable levels
Memory: 62 kB flash memory, 2.256 kB RAM
Development tools
Single-pin emulation
IDE-based assembly and C-source debugging
图1.ADE5566/ADE5569功能方框图
图2.ADE5166/ADE5169功能方框图
图3.ADE5166和ADE5169电表方框图
图4. ADE5166 和ADE5169的ADC和信号处理框图
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