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ISOM8118

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AC input, transistor output, single channel, opto-emulator with 375% to 560% CTR

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Data sheet

ISOM8118

ACTIVE
Data sheet Order now

Product details

Rating Catalog Product type Analog transistor output Input type AC Output type Analog transistor Withstand isolation voltage (VISO) (Vrms) 3750 Number of channels 1 Current transfer ratio (CTR) (min) (%) 375 Current transfer ratio (CTR) (max) (%) 560 Forward voltage (typ) (V) 1.2 Forward current (IF) (max) (mA) 50 Forward current (IF) (min) (µA) 500 Data rate (max) (Mbps) 0.1 Operating temperature range (°C) -55 to 125 Turnon time (enable) (µs) 0.44 Turnoff time (disable) (µs) 2.7 Creepage (min) (mm) 5 Clearance (min) (mm) 5
Rating Catalog Product type Analog transistor output Input type AC Output type Analog transistor Withstand isolation voltage (VISO) (Vrms) 3750 Number of channels 1 Current transfer ratio (CTR) (min) (%) 375 Current transfer ratio (CTR) (max) (%) 560 Forward voltage (typ) (V) 1.2 Forward current (IF) (max) (mA) 50 Forward current (IF) (min) (µA) 500 Data rate (max) (Mbps) 0.1 Operating temperature range (°C) -55 to 125 Turnon time (enable) (µs) 0.44 Turnoff time (disable) (µs) 2.7 Creepage (min) (mm) 5 Clearance (min) (mm) 5
SOIC (DFG) 4 24.57 mm² 3.51 x 7
  • Footprint compatible, pin-to-pin upgrade to industry-standard phototransistor optocouplers
  • 1-channel LED-emulator input
  • Current transfer ratio (CTR) at IF = 5mA, VCE = 5V:
    • ISOM8110, ISOM8115: 100% to 155%
    • ISOM8111, ISOM8116: 150% to 230%
    • ISOM8112, ISOM8117: 255% to 380%
    • ISOM8113, ISOM8118: 375% to 560%
  • High collector-emitter voltage: VCE (max) = 80V
  • Robust SiO2 isolation barrier
    • Isolation rating: 3750VRMS
    • Working voltage: 500VRMS, 707VPK
    • Surge capability: up to 10kV
  • Temperature range: -55°C to 125°C
  • Response time: 3µs (typical) at VCE = 10V, IC = 2mA, RL = 100Ω
  • Safety-related certifications planned:
    • UL 1577 recognition, 3750VRMS isolation
    • DIN EN IEC 60747-17 (VDE 0884-17) conformity per VDE
    • IEC 62368-1, IEC 61010-1 certifications
    • CQC GB 4943.1 certification
  • Footprint compatible, pin-to-pin upgrade to industry-standard phototransistor optocouplers
  • 1-channel LED-emulator input
  • Current transfer ratio (CTR) at IF = 5mA, VCE = 5V:
    • ISOM8110, ISOM8115: 100% to 155%
    • ISOM8111, ISOM8116: 150% to 230%
    • ISOM8112, ISOM8117: 255% to 380%
    • ISOM8113, ISOM8118: 375% to 560%
  • High collector-emitter voltage: VCE (max) = 80V
  • Robust SiO2 isolation barrier
    • Isolation rating: 3750VRMS
    • Working voltage: 500VRMS, 707VPK
    • Surge capability: up to 10kV
  • Temperature range: -55°C to 125°C
  • Response time: 3µs (typical) at VCE = 10V, IC = 2mA, RL = 100Ω
  • Safety-related certifications planned:
    • UL 1577 recognition, 3750VRMS isolation
    • DIN EN IEC 60747-17 (VDE 0884-17) conformity per VDE
    • IEC 62368-1, IEC 61010-1 certifications
    • CQC GB 4943.1 certification

The ISOM811x devices are single-channel optocoupler-emulators with LED-emulator input and transistor output. The devices are footprint compatible and pin-to-pin upgrades for many traditional optocouplers, allowing enhancement to existing systems with no PCB redesign.

ISOM811x opto-emulators offer significant reliability and performance advantages compared to optocouplers, including high bandwidth, low turn-off delay, low power consumption, wider temperature ranges, flat CTR, and tight process controls resulting in small part-to-part skew. Since there is no aging effect or temperature variation to compensate for, the emulated LED input stage consumes less power than optocouplers.

ISOM811x devices are offered in small SOIC-4 packages with 2.54mm and 1.27mm pin pitchs, supporting a 3.75kVRMS isolation rating and DC (ISOM811[0-3]) and bidirectional DC (ISOM811[5-8]) input options. The high performance and reliability of ISOM811x enables these devices to be used in power supply feedback design, motor drives, I/O modules in industrial controllers, factory automation applications, and more.

The ISOM811x devices are single-channel optocoupler-emulators with LED-emulator input and transistor output. The devices are footprint compatible and pin-to-pin upgrades for many traditional optocouplers, allowing enhancement to existing systems with no PCB redesign.

ISOM811x opto-emulators offer significant reliability and performance advantages compared to optocouplers, including high bandwidth, low turn-off delay, low power consumption, wider temperature ranges, flat CTR, and tight process controls resulting in small part-to-part skew. Since there is no aging effect or temperature variation to compensate for, the emulated LED input stage consumes less power than optocouplers.

ISOM811x devices are offered in small SOIC-4 packages with 2.54mm and 1.27mm pin pitchs, supporting a 3.75kVRMS isolation rating and DC (ISOM811[0-3]) and bidirectional DC (ISOM811[5-8]) input options. The high performance and reliability of ISOM811x enables these devices to be used in power supply feedback design, motor drives, I/O modules in industrial controllers, factory automation applications, and more.
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NEW ISOM8115 ACTIVE AC input, transistor output, single channel, opto-emulator with 100% to 155% CTR Different CTR range (100% - 155%)
NEW ISOM8116 ACTIVE AC input, transistor output, single channel, opto-emulator with 150% to 230% CTR Different CTR range (150% - 230%)
NEW ISOM8117 ACTIVE AC input, transistor output, single channel, opto-emulator with 255% to 380% CTR Different CTR range (255% - 380%)

Technical documentation

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Type Title Date
* Data sheet ISOM811x 3.75kVRMS , Single-Channel Opto-Emulator With Analog Transistor Output datasheet (Rev. C) PDF | HTML 25 Oct 2024
Technical article Opto-emulators explained: Why you should upgrade your optocoupler technology PDF | HTML 05 Jan 2024
Application brief Demystifying Isolation Certification Standards: Optocouplers vs Opto-emulators PDF | HTML 19 Oct 2023
Product overview Isolated Secondary-Side Overvoltage Protection Using Opto-emulators PDF | HTML 18 Sep 2023
Product overview Isolating Feedback Signals in Power Supplies PDF | HTML 18 Sep 2023
Product overview Replacing Optocouplers With Opto-Emulators PDF | HTML 18 Sep 2023
Application note Introduction to Opto-Emulators PDF | HTML 13 Sep 2023

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

ISOM-EVM — Universal opto-emulator evaluation module

The ISOM-EVM supports evaluation of TI opto-emulators in 5-pin DFF, 4-pin DFG, 4-pin DFH and 4-pin DFS SOIC packages. The evaluation module (EVM) can be reconfigured for evaluation of different opto-emulators, different input signal or other applications by changing the EVM configuration and (...)
User guide: PDF | HTML
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Simulation model

ISOM8110 PSpice Reference Design Model

SLLM501.ZIP (1 KB) - PSpice Model
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Reference designs

PMP23470 — 750 kHz flyback converter for 48V systems reference design

This reference design is an isolated high-frequency (750kHz) flyback converter with a 48V input and a 24V/0.7A output. A LM51561 provides control for the flyback converter and an ISOM8110 opto-emulator is used for feedback isolation.
Test report: PDF
Reference designs

TIDA-010271 — Stackable battery management unit reference design for energy storage systems

This is a full cell-temperature sensing and high cell voltage accuracy Lithium-ion (Li-ion), lithium iron phosphate (LiFePO4) battery pack (32s) reference design. The design monitors each cell voltage, cell temperature and protects the battery pack to secure safe use. This design uses onboard and (...)
Design guide: PDF
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SOIC (DFG) 4 Ultra Librarian
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