Analog Devices Inc. ADE7913/ADE7912 隔离式、Sigma Delta 模数转换器，带SPI
Analog Devices ADE7913/ADE7912 是充分隔离的模数 转换器（ADC），针对多种应用而设计，如 基于分流器的多相电表、电力质量监控、太阳能逆变器、 过程监控和保护器件。该器件集成了 Analog Devices 公司获得专利的 iCoupler® ®和 isoPower 技术， 实现隔离信号传输，并可在 5kV 额定值绝缘层上进行 直流-直流电力转换。这种集成允许使用 分流电阻器传感元件而非电流互感器（CT）， 从而提供对磁场干扰和干预的抗扰性。 使用分流器而非 CT 还降低了系统成本和尺寸。
The ADE7912 features two 24-bit ADCs, and the ADE7913 features three ADCs. The current ADC provides a 67dB signal-to-noise ratio over a 3kHz signal bandwidth, whereas the voltage ADCs provide a SNR of 72dB over the same bandwidth. One channel is dedicated to measuring the voltage across a shunt when the shunt is used for current sensing. Up to two additional channels are dedicated to measuring voltages, which are usually sensed using resistor dividers. One voltage channel can be used to measure the temperature of the die via an internal sensor.
The ADE7913 includes three channels: one current and two voltage channels. The ADE7912 has one voltage channel but is otherwise identical to the ADE7913.
特性
- Two (ADE7912) or three (ADE7913) 24-bit isolated, Σ-Δ analog-to-digital converters (simultaneously sampling ADCs)
- Integrated isoPower, isolated DC-to-DC converter
- On-chip temperature sensor mixed with second voltage channel
- 4-wire SPI serial interface
- Up to 4 ADE7912/ADE7913 devices clocked from a single crystal or an external clock
- Synchronization of multiple ADE7912/ADE7913 devices
- Safety and regulatory approvals (pending)
- UL recognition
- CSA Component Acceptance Notice #5A
- 400Vrms IEC 61010-1
- VDE certificate of conformity
- DIN VDE V 0884-10 (VDE V 0884-10):2006-12
规范
- Single 3.3V supply
- ±31.25mV peak input range for current channel
- ±500mV peak input range for voltage channels
- 20-lead, wide-body SOIC package with increased 8.3mm clearance and creepage
- 10ppm/°C typical Reference drift
- -40°C to +85°C operating temperature range
- 5000Vrms for 1 minute per UL 1577 Isolation rating
- 400Vrms IEC 61010-1
应用
- Shunt-based polyphase meters
- Power quality monitoring
- Solar inverters
- Process monitoring
- Protective devices
- Isolated sensor interfaces
- Industrial PLCs
视频
Typical Application Circuit
发布日期: 2014-04-04
| 更新日期: 2022-03-11