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ISO721-Q1 - 产品图解:
ISO721-Q1-汽车类单路 100Mbps 数字隔离器
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TI产品 - ISO721-Q1介绍
ISO721-Q1 - 汽车类单路 100Mbps 数字隔离器

ISO721-Q1是TI公司的一款无产品,ISO721-Q1是汽车类单路 100Mbps 数字隔离器,本页介绍了ISO721-Q1的产品说明、应用、特性等,并给出了与ISO721-Q1相关的TI元器件型号供参考。

ISO721-Q1 - 汽车类单路 100Mbps 数字隔离器 - 无 - 数字隔离器 - TI公司(Texas Instruments,德州仪器)

产品描述

The ISO72x-Q1 is a digital isolator with a logic input and output buffer separated by a silicon oxide (SiO2) insulation barrier. This barrier provides galvanic isolation of up to 4000 V. Used in conjunction with isolated power supplies, this device prevents noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

The capacitive isolation barrier conditions, translates to a balanced signal, then differentiates a binary input signal. Across the isolation barrier, a differential comparator receives the logic-transition information, then sets or resets a flip-flop and the output circuit accordingly. A periodic update pulse sent across the barrier ensures the proper dc level of the output. On failure to receive this dc refresh pulse for more than 4 µs, the response of the device is as if the input is or not actively driven, and the failsafe circuit drives the output to a logic-high state.

The symmetry of the dielectric and capacitor within the integrated circuitry provides for close capacitive matching and allows fast transient voltage changes between the input and output grounds without corrupting the output. The small capacitance and resulting time constant provide for fast operation with signaling rates(1) from 0 Mbps (dc) to 100 Mbps.

The device requires two supply voltages of 3.3 V, 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply, and all outputs are 4-mA CMOS. The device has a TTL input threshold and a noise filter at the input that prevents transient pulses of up to 2ns in duration from being passed to the output of the device.

The ISO722-Q1 device includes an active-low output enable that, when driven to a high logic level, places the output in a high-impedance state and turns off internal bias circuitry to conserve power.

The ISO72x-Q1 is characterized for operation over the ambient temperature range of –40°C to 125°C.

产品特性

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40ºC to 125ºC Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C5
  • 4000-V(peak) Isolation
    • UL 1577, IEC 60747-5-2 (VDE0884, Rev2), IEC61010-1
    • 50-kV/s Transient Immunity (Typ)
  • Signaling Rate 0 Mbps to 100 Mbps
    • Low Propagation Delay
    • Low Pulse Skew (Pulse-Width Distortion)
  • Low-Power Sleep Mode
  • High Electromagnetic Immunity
  • Low Input Current Requirement
  • Failsafe Output
  • Drop-In Replacement for Most Optical and Magnetic Isolators

(1) The signaling rate of a line is the number of voltage transitions that occur per second, expressed in the units bps (bits per second).

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