Analog Devices Inc. ADuM124x 双通道数字隔离器
亚德诺半导体 ADuM124x 双通道数字隔离器是基于 亚德诺半导体 iCoupler®技术的微功耗数字隔离器。这些隔离器件将高速 CMOS 与单芯片空芯变压器技术融为一体，具有优于光耦合器件等替代器件的出色性能特征，而所需功率低于现有的任何隔离产品。该系列双通道、3.75kVrms 数字隔离器件的工作电源电压低至 2.25V，数据传输率小于 20kbps 时消耗的最小典型电流低于 6A 每通道，在数据速率相当（最高 2Mbps）的情况下，其功耗仅相当于同类隔离器的一小部分。此外，所有型号均提供低脉冲宽度失真 (<8ns）和输入毛刺滤波器以保护设备不受外来噪声的干扰。所有型号均可在两侧采用独立电源电压（介于 2.25V 和 3.6V）的情况下工作，与低压系统兼容，并且能够跨越隔离栅实现电压转换功能。另外，在没有输入电源的情况下，所有型号的输出均为预先确定的默认输出逻辑状态：ADuM1240 和 ADuM1241 默认高电平输出，ADuM1245 和 ADuM1246 默认低电平输出。
This series of dual, 3.75kVrms digital isolation devices operate with supplies as low as 2.25V and typically consume a minimal current of less than 6μA per channel at data rates below 20kbps, a fraction of the power of comparable isolators at comparable data rates (up to 2Mbps). In addition, all models provide low pulse width distortion (<8ns) and an input glitch filter for extraneous noise disturbance protection.
All models operate with an independent supply voltage on either side (between 2.25V and 3.6V), providing compatibility with lower voltage systems and enabling voltage level translation functionality across the isolation barrier. In the absence of input power, the products default to a predetermined output logic state: the ADuM1240 and ADuM1241 default to high output, and the ADuM1245 and ADuM1246 default to low output.
特性
- Ultralow power operation
- 3.3V operation
- 16μA per channel maximum quiescent current, refresh enabled
- 0.3μA per channel typical quiescent current, refresh disabled
- 148μA/Mbps per channel typical dynamic current
- 2.5V operation
- 8μA per channel maximum quiescent current, refresh enabled
- 0.1μA per channel typical quiescent current, refresh disabled
- 116μA/Mbps per channel typical dynamic current
- Small, 20-lead SSOP package
- Bidirectional communication
- Up to 2Mbps data rate (NRZ)
- High temperature operation: 125°C
- High common-mode transient immunity: >25kV/μs
- Safety and Regulatory Approvals
- UL 1577 component recognition program (pending) - 3750Vrms for 1 minute per UL 1577
- CSA Component Acceptance Notice 5A (pending)
- VDE certificate of conformity (pending) - DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 VIORM = 849V peak
应用
- General-purpose, low power, multichannel isolation
- 1MHz low power SPI
- 4mA to 20mA loop process control
Block Diagram
