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Reinforced, Ultra-Low-Power, Two-Channel Digital Isolators

Ultra -Low-Power and High CMTI Digital Isolator

产品详情

主要特征

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主要特征

  • Ultra-Low Power Consumption
    • 11.4µA per Channel at DC with VDD = 3.3V
    • 15.4µA per Channel at 100kbps with VDD = 3.3V
    • 54.7µA per Channel at 1Mbps with VDD = 3.3V
  • Wide Supply Range Supports from 1.71V to 5.5V
  • Reinforced Galvanic Isolation for Digital Signals
    • 8-NSOIC with 4mm Creepage and Clearance Withstands 3kVRMS for 60s (VISO) and Continuously Withstands 445VRMS (VIOWM)
    • 8-WSOIC with 8mm Creepage and Clearance Withstands 5kVRMS for 60s (VISO) and Continuously Withstands 848VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (200kV/µs, min)
  • Low Propagation Delay and Low Jitter
    • Maximum Data Rate Up to 10Mbps
    • Low Propagation Delay 51ns (typ) at VDD = 3.3V
    • Clock Jitter RMS 15.4ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)
    • IECEx and ATEX Intrinsic Safety (IS): Sira 0518 II 1G Ex ia IIC Ga (Pending)

应用/用途

  • 4-20mA Loop Process Control
  • Battery Management
  • Compact Micro PLC
  • Parasitically Powered Applications

描述

The MAX22_2_ are a family of 2-channel reinforced ultra-low-power digital isolators. The MAX22_2_ consume ultra-low power not only in DC but also across the entire operating speed range up to 10Mbps. The family offers two unidirectional channel configurations to accommodate any 2-channel design.

The MAX22_20 feature two channels transferring digital signals in one direction. The MAX22_21 have one channel to transmit data in one direction and the other channel to transmit in the opposite direction.

The MAX22420/1 are available in an 8-pin narrow-body SOIC package with 4mm creepage and clearance and are rated up to 3kVRMS. The MAX22820/1 are available in an 8-pin wide-body SOIC package with 8mm creepage and clearance and are rated up to 5kVRMS. This family of digital isolators offers ultra-low-power operation, high electromagnetic interference (EMI) immunity, and stable temperature performance through Analog Devices’ proprietary process technology. The devices isolate different ground domains and block high-voltage/high-current transients from sensitive or human interface circuitry.

The family of devices has a maximum data rate of 10Mbps and can be ordered with two glitch filter options and default-high or default-low outputs. The default is the state the output assumes when the input is open circuit. The B/E versions have 70ns (typ) glitch filter and C/F versions have 29ns (typ) glitch filter. The devices have two supply inputs (VDDA and VDDB) that independently set the logic levels on either side of device. VDDA and VDDB are referenced to GNDA and GNDB, respectively. The family also features a refresh circuit to ensure output accuracy when an input remains in the same state indefinitely.

简化框图

MAX22420, MAX22421, MAX22820, MAX22821: Simplified Application Diagram MAX22420, MAX22421, MAX22820, MAX22821: Simplified Application Diagram Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心

采样:
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