• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The ISO7221 is a dual-channel digital isolator. To facilitate PCB layout, the channels are oriented in the opposite directions. This device has a logic input and output buffer separated by TI’s silicon-dioxide (SiO₂) isolation barrier, providing galvanic isolation of up to 4000 V. Used in conjunction with isolated power supplies, this device blocks high voltage, isolates grounds, and prevents noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

A binary input signal is conditioned, translated to a balanced signal, then differentiated by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or resets a flip-flop and the output circuit accordingly.

特性

• 1-, 5- and 25-Mbps Signaling Rate Options
  • Low Channel-to-Channel Output Skew; 1 ns max
  • Low Pulse-Width Distortion (PWD); 1 ns max
  • Low Jitter Content; 1 ns Typ at 150 Mbps
• 4000-V_peak Isolation, 560 V_peak V_IORM
  • UL 1577 Approved
  • 50-kV/µs Typical Transient Immunity
• Operates with 3.3-V or 5-V Supplies
• 4-kV ESD Protection
• High Electromagnetic Immunity
• APPLICATIONS
  • Down-Hole Drilling
  • High Temperature Environments
• APPLICATIONS
  • Controlled Baseline
  • One Assembly/Test Site
  • One Fabrication Site
  • Available in Extreme (–55°C/175°C)
    Temperature Range⁽¹⁾⁽²⁾
  • Extended Product Life Cycle
  • Extended Product-Change Notification