Texas Instruments AMC1106基本隔离式Δ-Σ型调制器

Texas Instruments AMC1106小型基础型隔离式Δ-Σ调制器具有±50mV输入电压范围、曼彻斯特编码CMOS接口以及系统级诊断功能。该器件的输出与输入电路由抗电磁干扰性能极强的电容式隔离栅隔开。AMC1106的输入极经优化，可以直接连接分流电阻或其他低压电平信号源。该特性通常用于多相电量计，可实现出色的交流和直流性能。该器件具有±50mV的低输入电压范围，支持使用具有较小电阻值的分流电阻器来最大限度地降低功耗。AMC1106利用适当的数字滤波器消除输出位流。借助MSP430F67x、TMS320F2807x和TMS320F2837x微控制器，AMC1210数字滤波器可与AMC1106集成以实现无缝运行。隔离栅的两侧均可在3.3V电压下工作以降低功耗。该调制器在高侧由3.3V或5V电源 (AVDD) 供电。隔离式数字接口由3.0V、3.3V或5V电源 (DVDD) 供电。该器件的额定扩展工业温度范围为–40°C至+125°C。

These are used in multi-phase electricity meters to achieve an ideal ac and dc performance. The ±50mV low input voltage range grants the use of small shunt resistor values to minimize power dissipation. The AMC1106 decimates the output bitstream with a relevant digital filter. The digital filters are integrated for seamless operation with the AMC1106 through the MSP430F67x, TMS320F2807x, and TMS320F2837x microcontrollers, with the AMC1210 filter. 3.3V operation for reduced power dissipation is offered on both sides of the isolation barrier. The modulator is supplied by a 3.3V or 5V power supply (AVDD) on the high side. 3.0V, 3.3V, or 5V power supply (DVDD) is operated from the isolated digital interface. The device is specified over the extended industrial temperature range of –40°C to +125°C.

特性

±50mV Input voltage range optimized for current measurement with shunt resistors
Manchester coded or uncoded bitstream options
Excellent DC performance for high-precision sensing on the system level:
- ±50µV, ±1µV/°C (max) Offset error and drift
- ±0.2%, ±40ppm/°C (max) Gain error and drift
3.3V Operation for reduced power dissipation on both sides of the isolation barrier
High electromagnetic field immunity (see the ISO72x digital isolator magnetic-field immunity application report)

System-level diagnostic features
Safety-related certifications:
- 5657VPK Basic isolation per DIN V VDE V 0884-11 (VDE V 0884-11): 2017-01
- 4000V_RMS Isolation for 1 minute per UL1577
- CAN/CSA No. 5A-Component acceptance service notice, IEC 60950-1, and IEC 60065 end equipment standards