Analog Devices Inc. ADuM144x 四通道数字隔离器
Analog Devices ADuM144x 四通道数字隔离器是采用了 iCoupler® 技术的微功耗、4通道器件。ADI ADuM144x 隔离器将高速互补金属氧化物半导体(CMOS)与单芯片空芯变压器技术融为一体，具有优于光耦合器等的出色性能特征。与市场上的所有隔离器件相比，该系列 ADI 数字隔离器功耗最低。通过 ENX 信号可禁用内部刷新，进而将总静态电流降低至1碌A以下。该系列器件不但可节省近70%的电路板空间，而且可耐受高隔离电压，满足法规要求。ADuM144x 隔离器的工作电压仅为2.25V。该系列器件具有较低的脉宽失真（<8ns）。此外，该系列器件还提供输入毛刺滤波器，以防外来噪声干扰。
The ADI ADuM144x digital isolators also offer a low power. The ENX signals can be used to disable the internal refresh, which lowers the total quiescent current to less than 1µA. These devices free almost 70% of board space but can still withstand high isolation voltages and meet regulatory requirements. ADuM144x isolators operate with supplies as low as 2.25V. This device family also provides low, pulse width distortion <8ns. These devices also have an input glitch filter to protect against extraneous noise disturbances.
EVAL-ADuM144x-EBZ supports the ADuM144x family of ultra low power, quad channel isolators. It provides a JEDEC standard QSOP16 pad layout, support for signal distribution, loop back, bypass capacitors, and loads referenced to VDDX or GNDX.
特性
- Ultralow power operation
- 3.3V operation (typical)
- 5.6μA per channel quiescent current, refresh enabled
- 0.3μA per channel quiescent current, refresh disabled
- 148μA/Mbps per channel typical dynamic current
- 2.5V operation (typical)
- 3.1μA per channel quiescent current, refresh enabled
- 0.1μA per channel quiescent current, refresh disabled
- 117μA/Mbps per channel typical dynamic current
- Small, 16-lead QSOP
- Bidirectional communication
- Up to 2Mbps data rate (NRZ)
- High temperature operation of 125°C
- High common-mode transient immunity of >25kV/μs
应用
- General-purpose, low power multichannel isolation
- 1MHz, low power Serial Peripheral Interface (SPI)
- 4mA to 20mA loop process controls