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Analog Devices Inc. LTM2886IY-3I#PBF
- Part No.:
- LTM2886IY-3I#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 32-BBGA Module
- Datasheet:
-
LTM2886IY-3I#PBF.pdf
- Description:
- DGTL ISOL 2500VRMS 6CH I2C 32BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,743
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Product details
Overview
LTM2886IY-3I#PBF from Analog Devices is an I²C-compatible galvanic digital µModule isolator with integrated isolated DC/DC power conversion. It provides 2500VRMS isolation, fixed ±5V and adjustable 5V isolated supplies (≥100mA each), 400kHz I²C data rate, and operates from a 3.3V input supply across –40°C to +85°C. It enables ground-loop-free communication in industrial sensor interfaces.
For engineers reviewing the LTM2886IY-3I#PBF datasheet, LTM2886IY-3I#PBF pinout, LTM2886IY-3I#PBF application, or LTM2886IY-3I#PBF equivalent, key selection criteria include I²C master-mode compatibility, 3V–3.6V primary-side operation, isolated dual-polarity power delivery, high common-mode transient immunity (30kV/µs), and BGA package integration for space-constrained isolation barriers.
Technical Context
The LTM2886IY-3I#PBF implements transformer-based galvanic isolation using coupled inductors and an isolation power transformer. Its I²C interface supports only master mode with bidirectional SDA and unidirectional SCL across the barrier, featuring internal current-source biasing on SDA2 and push-pull SCL2 outputs.
Isolation integrity is maintained via 560VPEAK maximum continuous working voltage, ±10kV HBM ESD rating across the barrier, and guaranteed 30kV/µs common-mode transient immunity. The device integrates three regulated isolated supplies: fixed +5V (V+), fixed –5V (V–), and adjustable 5V (VCC2) set via AVCC2 feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2500VRMS for 1 minute - meets UL-CSA recognition (File #E151738) for reinforced insulation in industrial systems |
| I²C Data Rate | 400kHz - supports standard-mode I²C master operation with guaranteed timing and bus capacitance up to 400pF |
| Input Supply | 3V to 3.6V - compatible with 3.3V logic rails; no external components required for regulation |
| Isolated Supplies | +5V (V+), –5V (V–), and 3V–5.5V adjustable (VCC2) - each delivers ≥100mA, enabling direct powering of isolated ADCs, sensors, or transceivers |
| Logic Supply Range | 3V to 5.5V (VL) - allows interoperability with 3.3V or 5V host controllers without level-shifting |
| Common-Mode Immunity | 30kV/µs - ensures uninterrupted I²C communication during fast transients in motor drives or power converters |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments with full parameter guarantees over range |
Pinout & Package
32-pin BGA package (15mm × 11.25mm × 3.42mm), RoHS-compliant, lead-free (PBF), moisture-sensitive level 3. Pin layout optimized for symmetric signal/power routing across isolation barrier.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (DO2) | Digital output (logic side) | Drives I2 on isolated side; high-impedance fault state prevents bus contention during isolation failure |
| A3 (SCL) | I²C clock input (logic side) | Unidirectional master clock input referenced to VL/GND; must not be floated |
| A4 (SDA) | I²C bidirectional data (logic side) | Connected to SDA2 across barrier; high-impedance fault state preserves bus integrity |
| A5 (DI1) | Digital input (logic side) | Directly maps to O1 output on isolated side; requires pull-up/down if unused |
| A7 (ON) | Enable control | Active-high enable: low disables all outputs and powers down isolated side (<10µA shutdown current) |
| A8 (VL) | Logic interface supply | 3V–5.5V supply for DI1, SCL, SDA, DO1, DO2, ON; internally bypassed with 1µF |
| B1 (DO1) | Digital output (logic side) | Drives I1 on isolated side; high-impedance fault state isolates downstream logic |
| B7–B8 (VCC) | Main input supply | 3V–3.6V input powering both sides via integrated isolated DC/DC; internally bypassed with 2.2µF |
| K1 (I1) | Digital input (isolated side) | Receives DO1 signal; defaults high during isolation failure to avoid undefined states |
| L1 (I2) | Digital input (isolated side) | Receives DO2 signal; defaults high during isolation failure for fail-safe behavior |
| L3 (SCL2) | I²C clock output (isolated side) | Push-pull output; no external pull-up permitted; defaults high on isolation failure |
| L4 (SDA2) | I²C bidirectional data (isolated side) | Biased high by 1.8mA current source; no external pull-up permitted; defaults high on failure |
| L5 (O1) | Digital output (isolated side) | Receives DI1 signal; defaults high on isolation failure to maintain known state |
| L6 (VCC2) | Adjustable isolated supply | 5V nominal, adjustable 3V–5.5V via AVCC2 divider; delivers ≥100mA; bypassed with 2.2µF |
| L7 (V–) | Negative isolated supply | –5V nominal, regulated, ≥100mA output; bypassed with 2.2µF; enables bipolar analog circuitry |
| L8 (V+) | Positive isolated supply | +5V nominal, regulated, ≥100mA output; bypassed with 2.2µF; powers isolated logic or analog ICs |
| K6 (AVCC2) | VCC2 feedback adjust | 1.22V reference to GND2; sets VCC2 output via external resistor divider per datasheet Figure 13 |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Complete isolation solution with integrated DC/DC converter, regulators, and signal buffers - reduces BOM count and layout complexity |
| I²C master-mode support only | Optimized for host-to-peripheral isolation (e.g., MCU to isolated sensor); eliminates slave arbitration logic and associated timing overhead |
| ±10kV HBM ESD across barrier | Robust protection against electrostatic discharge between logic and isolated domains without external TVS devices |
| Low shutdown current (<10µA) | Enables power-gating in battery-backed or energy-sensitive systems without compromising isolation integrity |
| High-speed logic isolation (10MHz) | Supports non-I²C digital signals (DI1/DO1, DI2/DO2) at up to 10MHz - useful for GPIO, PWM, or status signaling |
Applications
| Industrial Sensor Interface | Isolated Data Acquisition |
|---|---|
Use Scenario: Connecting temperature/pressure sensors in high-noise motor drive cabinets to a central PLC controller. IC Role / Device Role / Timing Role: I²C isolator bridging noisy field-side sensors to clean controller-side bus, providing ±5V isolated power for sensor excitation and signal conditioning. Use Value: Breaks ground loops while delivering regulated isolated power - eliminates measurement offset drift caused by >30kV/µs transients in VFD environments. | Use Scenario: Isolating 16-bit SAR ADCs in test equipment where analog front-end and digital processing reside on separate grounds. IC Role / Device Role / Timing Role: Provides galvanically isolated I²C interface and dedicated ±5V supplies to power ADC reference and op-amp stages. Use Value: Enables 100dB+ PSRR and <1 LSB INL error by eliminating shared-impedance coupling between digital and analog domains. |
| Medical Patient Monitoring | Programmable Logic Controller I/O |
Use Scenario: Isolating biopotential electrodes (ECG/EEG) from microcontroller-based patient monitors to meet IEC 60601-1 creepage/clearance requirements. IC Role / Device Role / Timing Role: Delivers reinforced 2500VRMS isolation and 9.5mm creepage distance while powering isolated analog front-end ICs from V+, V–, and VCC2. Use Value: Meets patient-connected isolation safety standards without requiring discrete transformers or extra regulator ICs. | Use Scenario: Adding isolated digital I/O expansion modules to PLC backplanes where field-side 24V inputs must be decoupled from 3.3V logic. IC Role / Device Role / Timing Role: Translates PLC CPU's I²C commands into isolated 24V-sink/sourcing outputs using VCC2-powered level shifters and V+/V– for analog conditioning. Use Value: Reduces module footprint by integrating isolation, power, and protocol translation - avoids stacking multiple discrete isolators and DC/DC chips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator with integrated power applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6401ARWZ | IsoPower-based quad-channel isolator with 500mW isolated power; no negative rail; 1Mbps SPI-only interface | Lacks I²C support and ±5V supplies; suited for SPI-based digital I/O, not sensor interfaces requiring bidirectional I²C and bipolar analog power | Select when SPI communication dominates and isolated power demand is ≤500mW without negative voltage needs |
| SI8661ED-B-IS | 6-channel digital isolator with external isolated DC/DC (e.g., RECOM RxxPxx); no integrated power regulation | Requires external transformer and regulator design; supports I²C but adds layout complexity and component count | Select when custom isolated power rails (non-5V) or higher efficiency (>61%) are required, and design resources allow external power integration |
Compared with ADUM6401ARWZ and SI8661ED-B-IS, the LTM2886IY-3I#PBF uniquely combines I²C master support, integrated ±5V/adjustable 5V supplies, and 2500VRMS isolation in one BGA package - reducing design time and board area for sensor and data acquisition systems requiring minimal external components.
Availability
LTM2886IY-3I#PBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, isolated data acquisition systems, medical patient monitoring equipment, and programmable logic controller I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for LTM2886IY-3I#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTM2886 product line delivers complete, component-level isolated µModule solutions targeting space-constrained, high-reliability applications where integrated signal and power isolation eliminate design risk and accelerate time-to-market.
FAQ
What communication protocols does the LTM2886IY-3I#PBF support?
The LTM2886IY-3I#PBF supports I²C master-mode communication only, with guaranteed 400kHz operation, bidirectional SDA, and unidirectional SCL across the isolation barrier. It does not support I²C slave mode, SMBus, or SPI - those require the LTM2886-S variants. Protocol selection is fixed at manufacture and cannot be reconfigured.
Can the LTM2886IY-3I#PBF generate a negative supply for analog circuitry?
Yes, the LTM2886IY-3I#PBF includes a dedicated –5V isolated supply (V–) capable of delivering ≥100mA. This rail is internally regulated and bypassed with 2.2µF, enabling direct powering of op-amps, ADC references, or other bipolar analog components on the isolated side without external charge pumps or inverters.
What is the purpose of the AVCC2 pin on the LTM2886IY-3I#PBF?
The AVCC2 pin on the LTM2886IY-3I#PBF serves as the feedback adjust terminal for the 3V–5.5V adjustable isolated supply (VCC2). It presents a precise 1.22V reference to GND2, allowing external resistor dividers to set VCC2 output voltage per the formula in the datasheet Applications Information section - critical for matching non-5V isolated peripherals.
Does the LTM2886IY-3I#PBF require external bypass capacitors?
Yes, the LTM2886IY-3I#PBF requires external bypass capacitors: 1µF on VL, and 2.2µF on VCC, VCC2, V+, and V–. These are specified in the Absolute Maximum Ratings and Typical Performance sections. Omitting them risks instability, increased ripple, or failure to meet load regulation specs under dynamic conditions.
How does the LTM2886IY-3I#PBF behave during isolation barrier failure?
During isolation barrier failure, the LTM2886IY-3I#PBF places all logic-side digital outputs (DO1, DO2) and isolated-side digital inputs (I1, I2) into high-impedance states, while isolated-side outputs (SCL2, SDA2, O1) default to high. This fail-safe behavior prevents bus contention and maintains defined logic levels to avoid system lockup or erroneous commands.
LTM2886IY-3I#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-BBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- I2C
- Isolated Power:
- Yes
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 3/3
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 30kV/µs
- Data Rate:
- 400kHz
- Propagation Delay tpLH / tpHL (Max):
- 250ns, 250ns
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 250ns, 250ns (Max)
- Voltage - Supply:
- 3V ~ 3.6V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-BGA (15x11.25)
LTM2886IY-3I#PBF FAQ
1.How can I place an order for LTM2886IY-3I#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM2886IY-3I#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTM2886IY-3I#PBF reliable?
The price and inventory of LTM2886IY-3I#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM2886IY-3I#PBF is usually 5 days.
3.What payment methods are accepted for LTM2886IY-3I#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM2886IY-3I#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM2886IY-3I#PBF?
LTM2886IY-3I#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM2886IY-3I#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTM2886IY-3I#PBF?
For technical support, including LTM2886IY-3I#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM2886IY-3I#PBF requirements.
6.How does Aetrix verify that LTM2886IY-3I#PBF is sourced from the original manufacturer or authorized distributors?
All LTM2886IY-3I#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTM2886IY-3I#PBF meets industry standards.
7.What is the process for return or replacement of LTM2886IY-3I#PBF?
All LTM2886IY-3I#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM2886IY-3I#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTM2886IY-3I#PBF part is unused and in its original packaging.
Return procedure for LTM2886IY-3I#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTM2886IY-3I#PBF Tags
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