TI AMC1304多相电能测量系统参考设计TIDA－01088

TI公司的AMC1304是集成了LDO的高精度输入输出隔离的ΔΣ调制器,隔离层高达7000VPEAK,符合DIN V VDE V 0884-10,UL1577和CSA标准,具有极好的DC性能,支持高精度系统检测:失调误差±50 μV或±100 μV,失调漂移小于1.3 μV/¡ãC,增益误差±0.2%或 ±0.3%,增益漂移小于±40 ppm/°C,主要用于基于并联电阻的电流检测如工业马达驱动器,光伏逆变器和UPS以及隔离电压测量.本文介绍了AMC1304主要特性,功能框图,频率逆变器应用电路图,以及多相电能测量系统参考设计TIDA-01088主要特性和系统指标,框图,电路图,主要元件分布图和PCB设计图.
The AMC1304 is a precision, delta-sigma (ΔΣ)modulator with the output separated from the inputcircuitry by a capacitive double isolation barrier that ishighly resistant to magnetic interference. This barrieris certified to provide reinforced isolation of up to7000 VPEAK according to the DIN V VDE V 0884-10,UL1577 and CSA standards. Used in conjunction withisolated power supplies, the device prevents noisecurrents on a high common-mode voltage line fromentering the local system ground and interfering withor damaging low voltage circuitry.
The input of the AMC1304 is optimized for directconnection to shunt resistors or other low voltagelevelsignal sources. The unique low input voltagerange of the ±50-mV device allows significantreduction of the power dissipation through the shuntwhile supporting excellent ac and dc performance. Byusing an appropriate digital filter (that is, as integratedon the TMS320F2807x or TMS320F2837x families) todecimate the bit stream, the device can achieve 16bits of resolution with a dynamic range of 81 dB (13.2ENOB) at a data rate of 78 kSPS.
On the high-side, the modulator is supplied by anintegrated low-dropout (LDO) regulator that allows anunregulated input voltage between 4 V and 18 V(LDOIN). The isolated digital interface operates froma 3.3-V or 5-V power supply (DVDD).
The AMC1304 is available in a wide-body SOIC-16(DW) package and is specified from –40°C to+125°C.
AMC1304主要特性:
1• Pin-Compatible Family ...