TI AMC1304智能电网电流电压检测方案

TI公司的AMC1304是精密Delta-Sigma (ΔΣ)调制器,输出和输入通过容性绝缘层隔离,满足UL1577和VDE V-0884-10标准,隔离电压高达7000 VPEAK输入电压测量范围±50-mV或 ±250-mV ,CMOS或LVDS数字接口,主要用于工业马达驱动,光伏逆变器和能量电表.本文介绍了AMC1304主要特性,简化电路图,以及电流检测单元TIDA-00080主要特性,绝缘电流/电压模块(ICVM)和滤波器模块(FMB)系统框图,电路图,材料清单和PCB设计图.
The AMC1304 family are precision, delta-sigma (ΔΣ) modulators with the output separated from the input circuitry by a capacitive isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced isolation of up to 7000 VPEAK according to the UL1577 and VDE V-0884-10 standards. Used in conjunction with isolated power supplies, the device prevents noise currents on a high common-mode voltage line from entering the local ground and interfering with or damaging sensitive circuitry.
The input of the AMC1304 is optimized for direct connection to shunt resistors or other low voltage level signal sources. The unique low input voltage range of the device allows significant reduction of the power dissipation through the shunt while supporting excellent ac and dc performance. When used with an appropriate external digital filter, the device can be used to achieve 16 bits of resolution with a dynamic range of 76 dB (AMC1304x05) at 78 kSPS.
On the high-side, the modulator is supplied with an integrated LDO regulator that allows an unregulated voltage to be applied between 4 V and 18 V. The isolated digital interface operates from a 3.0-V to 5.5-V supply (DVDD).
The AMC1304 is available in a wide-body SOIC-16 (DW) package and is specified from –40℃ to 125℃.
AMC1304主要特性:

Pin-Compatible Family Optimized for Shunt Resistor Based Current Measurements:
±50-mV or ±250-mV Input Voltage Ranges
CMOS or LVDS Digital Interface Options
Excellent DC Performance Supporting High-Precision Sensing on System Level:
Offset Er...