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Galvanic Isolation & RS485
Triad Semiconductor - The Configurable Mixed Signal ASIC Company
Galvanic Isolation

 Galvanic isolation contained in IC1
- IC2 ground at 450V
- IC1 ground at 0V

 Inductive coupling of...
Galvanic Isolation Capabilities

Inductive coupling
between layers

Continuous
10 y / 150 C / 10ppm

Transient
100s / 150 ...
Galvanic Isolation Encode / Decode

 Signals encoded (modulated) to allow for transmission though the inductive loop
 Si...
Galvanic Isolation within a System-In-Package Solution

Page  5

YOUR LOGO
Triad Semiconductor Proprietary & Confidential...
RS-485 Overview
RS-485 is a half-duplex, 2-wire, multi-drop
communications implementation
- Physical layer specification ...
Triad RS-485 IP Block Highlights
- One transmitter / one receiver
- Separate TX/RX enables
- Thermal cutoff and short circ...
Key Parameter Comparison with RS-485 Standard
Max Number of Transmitters/Receivers on Bus
Standard requires 32...
Triad IP...
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Galvanic isolation & Triad Semiconductor Mixed-Signal ASIC Solutions

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Galvanic isolation is used in a variety of medical and industrial applications to isolation a circuit at a high voltage potential from a circuit at a low voltage potential. This isolation prevents excessive voltages from either circuit from reaching the other circuit. This presentation outlines a semiconductor transformer method developed by the AMS foundry to place transformers in silicon on to achieve such isolation between two CMOS high-voltage die in the same plastic package. This capability is available from Triad Semiconductor and AMS.

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  • Transcript of "Galvanic isolation & Triad Semiconductor Mixed-Signal ASIC Solutions"

    1. 1. Galvanic Isolation & RS485 Triad Semiconductor - The Configurable Mixed Signal ASIC Company
    2. 2. Galvanic Isolation  Galvanic isolation contained in IC1 - IC2 ground at 450V - IC1 ground at 0V  Inductive coupling of signals between IC2 and IC1  Isolation Coils (transformer) can be built in various device layers  Signals in IC1 and IC2 are modulated before transmission across the Galvanic Transformer Page  2 YOUR LOGO Triad Semiconductor Proprietary & Confidential Information
    3. 3. Galvanic Isolation Capabilities Inductive coupling between layers Continuous 10 y / 150 C / 10ppm Transient 100s / 150 C / 10ppm Metal-1 to Metal-3 207Vrms, 290VDC 2.1kVrms Substrate to Metal-3 300Vrms, 423VDC 3.0kVrms Metal-1 to Metal-4 330Vrms, 465VDC 3.3kVrms Substrate to Metal-4 420Vrms, 590VDC 4.2kVrms Galvanic isolation guidelines for inductive coupling between different process layers. Page  3 YOUR LOGO Triad Semiconductor Proprietary & Confidential Information
    4. 4. Galvanic Isolation Encode / Decode  Signals encoded (modulated) to allow for transmission though the inductive loop  Signals decoded (demodulated) after inductive loop to baseband and DC signals High-Side VCA Die Low-Side VCA Die Decode Encode Encode Page  4 Galvanic Isolation Inductive Coil Galvanic Isolation Inductive Coil Decode YOUR LOGO Triad Semiconductor Proprietary & Confidential Information
    5. 5. Galvanic Isolation within a System-In-Package Solution Page  5 YOUR LOGO Triad Semiconductor Proprietary & Confidential Information
    6. 6. RS-485 Overview RS-485 is a half-duplex, 2-wire, multi-drop communications implementation - Physical layer specification only - No communication protocol is implied - Differential twisted-pair increases noise immunity - Data rates from 10’s of Kbps to 10’s of Mbps Applications include - Industrial process monitoring and control - Factory automation - Robotics motor control - Serial communications requiring a more robust electrical interface when compared to RS-232 Page  6 YOUR LOGO Triad Semiconductor Proprietary & Confidential Information
    7. 7. Triad RS-485 IP Block Highlights - One transmitter / one receiver - Separate TX/RX enables - Thermal cutoff and short circuit protection - Pre-compensation filter and programmable slew rate for enhanced performance over long transmission lines • Analog power (VDD) from 8V to 15V IO IOVOLTS VDD TXEN IO 220k VCC 220k sl e • Digital I/O from 1.5V to 5.5V • Data rates up to 500Kbps E TXIN IO • Analog I/O (VCC) from 3V to VDD w • Common mode range from -10V to +12V 220k PRECOMP on/off • BUS+/- ports tolerant to +/- 45V BUS- RXOUT BUS+ • 120mA drive capability /RXEN 220k Page  7 GND YOUR LOGO Triad Semiconductor Proprietary & Confidential Information
    8. 8. Key Parameter Comparison with RS-485 Standard Max Number of Transmitters/Receivers on Bus Standard requires 32... Triad IP supports 64! ... ... ... ... ... ... Max Cable Length Standard requires 4,000 ft... Triad IP supports 14,000 ft! OR Up to 10 stubs of 2,500 ft each (25,000 ft total length)! ** Pre-compensation filter and programmable slew-rate allow communicating over long lengths Page  8 YOUR LOGO Triad Semiconductor Proprietary & Confidential Information
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