返回Analog Devices Inc.

Analog Devices Inc. AD7403 16 位隔离式 Σ-Δ 型调制器

Analog Devices AD7403 16 位隔离式 Σ-Δ 型调制器是一款高性能的二阶Σ-Δ型调制器，片上的数字隔离采用 ADI 公司的 iCoupler® 技术，能将模拟输入信号转换为高速单比特数据流。AD7403 采用 5V (VDD1）电源供电，可输入 ±250mV 的差分信号（满量程±320mV）。该差分输入信号非常适合用于要求电流隔离的高电压应用中的监控分流电压。模拟输入由高性能模拟调制器连续采样，并转换为数据率最高为 20MHz 且密度为 1 的数字输出流。通过适当的数字滤波器可重构原始信息，以在 78.1kSPS 时实现 88dB 的信噪比(SNR)。串行输入/输出可采用 5V 或 3V 电源供电（VDD2）。串行接口采用数字式隔离。通过将高速互补金属氧化物半导体（CMOS）技术和单片变压器技术结合在一起，较之传统的光耦合器等其它元件来说，片内隔离能提供更加优异的工作特性。

The original information can be reconstructed with an appropriate digital filter to achieve 88dB signal to noise ratio (SNR) at 78.1kSPS. The serial input/output can use a 5V or a 3V supply (VDD2). The serial interface is digitally isolated. High speed complementary metal oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, means the on-chip isolation provides outstanding performance characteristics, superior to alternatives such as optocoupler devices.

View Associated Eval Tools

特性

  • 5MHz to 20MHz external clock input rate
  • 16 bits, no missing codes
  • Signal-to-noise ratio (SNR): 88dB typical
  • Effective number of bits (ENOB): 14.2 bits typical
  • Offset drift vs. temperature:
    • AD7403: 1.6μV/°C typical
    • AD7403-8: 2μV/°C typical
  • On-board digital isolator
  • On-board reference
  • Full-scale analog input range: ±320mV
  • Operating range 
  • AD7403: -40°C to + 125°C
  • AD7403/-8: -40°C to + 105°C
  • High common-mode transient immunity: >25kV/μs
  • 16-lead, wide-body SOIC, with increased creepage package
  • Slew rate limited output for low electromagnetic interference (EMI)
  • Safety and regulatory approvals (pending)
    • UL recognition
      • 5000Vrms for 1 minute per UL 1577
    • CSA Component Acceptance Notice 5A
    • VDE Certificate of Conformity
      • DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 VIORM = 1250VPEAK

应用

  • Shunt current monitoring
  • AC motor controls
  • Power and solar inverters
  • Wind turbine inverters
  • Data acquisition systems
  • Analog-to-digital and opto-isolator replacements
发布日期: 2014-07-10 | 更新日期: 2025-02-07