content here.
content here.

ADM2485:  High Speed, Isolated RS-485 Transceiver with Integrated Transformer Driver

The ADM2485 differential bus transceiver is an integrated, galvanically isolated component designed for bidirectional data communication on multipoint bus transmission lines. It is designed for balanced transmission lines and complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E).

The device employs Analog Devices, Inc., iCoupler ® technology to combine a 3-channel isolator, a ...More

ADM2485:  High Speed, Isolated RS-485 Transceiver with Integrated Transformer Driver

Product Description

The ADM2485 differential bus transceiver is an integrated, galvanically isolated component designed for bidirectional data communication on multipoint bus transmission lines. It is designed for balanced transmission lines and complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E).

The device employs Analog Devices, Inc., iCoupler ® technology to combine a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package. An on-chip oscillator outputs a pair of square waveforms that drive an external transformer to provide isolated power with an external transformer. The logic side of the device can be powered with either a 5 V or a 3.3 V supply, and the bus side is powered with an isolated 5 V supply.

The ADM2485 driver has an active high enable. The driver differential outputs and the receiver differential inputs are connected internally to form a differential input/output port that imposes minimal loading on the bus when the driver is disabled or when VDD1 or VDD2 = 0 V. Also provided is an active high receiver disable that causes the receive output to enter a high impedance state.

The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention might cause excessive power dissipation. The part is fully specified over the industrial temperature range and is available in a 16-lead, wide-body SOIC package.

Applications

  • Isolated RS-485/RS-422 interfaces
  • PROFIBUS networks
  • Industrial field networks
  • Multipoint data transmission systems

    • Data Sheet, Rev. A, 12/07

    RESOURCES & TOOLS

    What is your task? Try Lead the Way AdvisorTM BETA
    • Half-duplex, isolated RS-485 transceiver
    • Integrated oscillator driver for external transformer
    • PROFIBUS® compliant
    • Complies with ANSI/TIA/EIA RS-485-A-98 and ISO 8482:1987(E)
    • Data rate: 16 Mbps
    • 5 V or 3.3 V operation (VDD1)
    • High common-mode transient immunity: >25 kV/μs
    • Wide-body, 16-lead SOIC package
    • 50 nodes on bus
    • Isolated DE OUT status output
    • Thermal shutdown protection
    • Safety and regulatory approvals
      UL recognition: 2500 V rms for 1 minute per UL 1577
      VDE Certificate of Conformity
      DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
      Reinforced insulation, VIORM = 560 V peak
    • Operating temperature range: –40°C to +85°C
    • # Ch: 1
    • iCouplerType: RS-485
    • Max Data Rate(Mbps): 16Mbps
    • Package: 16-Lead SOIC
    • Insulation Rating (kVrms): 2.5kV rms
    • Max Operating Temp (°C): 85Deg
    • Pos Supply: +2.7V to +5.5V

    Functional Block Diagram for ADM2485

    实验室电路

    Find more at our Circuits Library.

    类似产品

    arrow View Full Interactive Product Selection Table
    Part# # Ch # of Inputs Side 1 # of Inputs Side 2 Insulation Rating (kVrms) Max Data Rate(Mbps) Max Prop Delay (ns) Pos Supply Max Operating Temp (°C) Package Price* (1000-4999)
    ADUM1100 1 1 0 2.5 100 18 +3V to +5.5V 125 8-Lead SOIC $1.63
    ADUM1200 2 2 0 2.5 25 45 +2.7V to +5.5V 125 8-Lead SOIC $1.22
    ADUM1201 2 1 1 2.5 25 45 +2.7V to +5.5V 125 8-Lead SOIC $1.22
    ADUM1210 2 2 0 2.5 10 50 +2.7V to +5.5V 105 8-Lead SOIC $1.78
    ADUM1300 3 3 0 2.5 90 32 +2.7V to +5.5V 125 16-Lead SOIC $1.63
    ADUM1301 3 2 1 2.5 90 32 +2.7V to +5.5V 125 16-Lead SOIC $1.63
    ADUM1310 3 3 0 2.5 10 50 +2.7V to +5.5V 105 16-Lead SOIC $1.35
    ADUM1311 3 2 1 2.5 10 50 +2.7V to +5.5V 105 16-Lead SOIC $1.35
    ADUM1400 4 4 0 2.5 90 32 +2.7V to +5.5V 125 16-Lead SOIC $2.17
    ADUM1401 4 3 1 2.5 90 32 +2.7V to +5.5V 125 16-Lead SOIC $2.17
    ADUM1402 4 2 2 2.5 90 32 +2.7V to +5.5V 125 16-Lead SOIC $2.17
    ADUM1410 4 4 0 2.5 10 50 +2.7V to +5.5V 105 16-Lead SOIC $1.68
    ADUM1411 4 3 1 2.5 10 50 +2.7V to +5.5V 105 16-Lead SOIC $1.68
    ADUM1412 4 2 2 2.5 10 50 +2.7V to +5.5V 105 16-Lead SOIC $1.68
    ADUM1510 5 5 0 2.5 10 50 +4.5V to +5.5V 105 16-Lead SOIC $4.54
    ADUM2200 2 2 0 5 10 50 +3V to +5.5V 105 16-Lead SOIC $1.67
    ADUM2201 2 1 1 5 10 50 +3V to +5.5V 105 16-Lead SOIC $1.66
    ADUM2400 4 4 0 5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $3.20
    ADUM2401 4 3 1 5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $3.20
    ADUM2402 4 2 2 5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $3.20
    ADUM3100 1 1 0 2.5 50 28 +3V to +5.5V 105 8-Lead SOIC $1.71
    ADUM3200 2 2 0 2.5 25 45 +2.7V to +5.5V 105 8-Lead SOIC $1.28
    ADUM3201 2 1 1 2.5 25 45 +2.7V to +5.5V 105 8-Lead SOIC $1.28
    ADUM3210 2 2 0 2.5 10 50 +2.7V to +5.5V 125 8-Lead SOIC $0.93
    ADUM3211 2 1 1 2.5 10 50 +2.7V to +5.5V 125 8-Lead SOIC $0.93
    ADUM3300 3 3 0 2.5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $1.71
    ADUM3301 3 2 1 2.5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $1.71
    ADUM3400 4 4 0 2.5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $2.28
    ADUM3401 4 3 1 2.5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $2.28
    ADUM3402 4 2 2 2.5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $2.28
    ADUM3440 4 4 0 2.5 150 32 +3V to +5.5V 105 16-Lead SOIC $3.53
    ADUM3441 4 3 1 2.5 150 32 +3V to +5.5V 105 16-Lead SOIC $3.53
    ADUM3442 4 2 2 2.5 150 32 +3V to +5.5V 105 16-Lead SOIC $3.53
    ADUM4400 4 4 0 5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $3.36
    ADUM4401 4 3 1 5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $3.36
    ADUM4402 4 2 2 5 90 32 +2.7V to +5.5V 105 16-Lead SOIC $3.36
    ADUM7440 4 4 0 1 25 56 +3V to +5.5V 105 16-Lead QSOP $1.50
    ADUM7441 4 3 1 1 25 56 +3V to +5.5V 105 16-Lead QSOP $1.50
    ADUM7442 4 2 2 1 25 56 +3V to +5.5V 105 16-Lead QSOP $1.50
    back to top

    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    ** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

    价格、封装以及购买

    打印表
    back to top

    Help

    产品型号
    产品型号是指能够购买或者索取样片的某类产品的具体型号。

    产品状态
    产品状态指该产品当前的生存周期。它指下面四个阶段之一：
    • 预发布：该产品型号尚未投入正式生产，但是可以提供样片。
    • 生产：该产品型号目前已在生产，可以购买和索取样片。
    • 停产前限时购买：该型号已经计划停产，但仍然可以在限定的时间内购买。
    • 停产：该型号产品已经停产，不再提供。本表格中列出的其它型号产品仍可以供货（如果这些型号不处于停产状态）。
    封装说明
    这种集成电路（IC）的封装说明，例如：DIP，SOIC和BGA封装。评估板是一块用来演示器件性能的试验板，该器件也包含在该评估板上。

    欲详细了解封装图和化学成份请访问：  封装网页

    引脚数
    引脚数是指该器件的引脚、球状焊点或焊盘的数量。产品技术资料中提供引脚排列图和引脚功能描述。

    温度范围
    这是指该器件允许的工作温度范围。以下为所规定的三种温度范围：
    • 民用温度范围：0 ºC～＋70 ºC
    • 军用温度范围：－55ºC ～＋125ºC
    • 工业用温度范围：不同型号的产品的温度范围可能不同。欲了解更多信息，请查阅产品技术资料。
    • 汽车工作温度范围：-40 ℃～ +125 ℃
    报价
    这里所列出的美国报价单仅供预算参考，指美元报价（规定订量的每片美元，美国离岸价），如有修改不再另行通知。由于地区关税、商业税、汇率及手续费原因，国际报价可能不同。对于特殊批量报价，请与您当地的ADI公司办事处或代理商联络。对于评估板和套件的报价是指一个单位价格。

    Production Availability
    This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
    Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

    无铅封装产品
    ADI公司由于对应用环境的考虑，提供许多无铅（Pb）封装产品。欲获知更多关于无铅封装产品的信息，请访问我们的 Pb 无铅（Pb）封装产品网页。

    View PCN
    这是有关这款型号的产品变更通知(PCN)列表。点击链接以查看PCN详情。如需了解ADI PCN过程的更多信息，请访问我们的 PCN政策声明页面。

    *这里所列出的美国报价单仅供预算参考，指美元报价（规定订量的每片美元，美国离岸价），如有修改不再另行通知。由于地区关税、商业税、汇率及手续费原因，国际报价可能不同。对于特殊批量报价，请与您当地的ADI公司办事处或代理商联络。对于评估板和套件的报价是指一个单位价格。
    **样片供货情况可能好于生产供货，请将样片放入购物车，以查看样片供货情况。