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Analog Devices Inc. LTM2887IY-5S#PBF
- Part No.:
- LTM2887IY-5S#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 32-BBGA Module
- Datasheet:
-
LTM2887IY-5S#PBF.pdf
- Description:
- DGTL ISOL 2500VRMS 6CH SPI 32BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,922
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Product details
Overview
LTM2887IY-5S#PBF from Analog Devices is a galvanically isolated SPI µModule isolator with dual 5V isolated regulators, 2500VRMS isolation rating, 4MHz SPI data rate, and 100mA per regulator output current. It operates from a single 4.5V–5.5V input supply, supports 1.62V–5.5V logic levels, and is used in industrial PLCs to isolate SPI-connected ADCs and DACs from noisy motor control domains.
For engineers reviewing the LTM2887IY-5S#PBF datasheet, LTM2887IY-5S#PBF pinout, LTM2887IY-5S#PBF application, or LTM2887IY-5S#PBF equivalent, key selection criteria include SPI interface compatibility, dual-regulator programmability, 30kV/µs common-mode transient immunity, BGA package thermal performance, and industrial temperature range (–40°C to +85°C).
Technical Context
The LTM2887IY-5S#PBF implements coreless transformer-based signal isolation with pulse encoding, error checking, and automatic fail-safe shutdown. Its integrated DC/DC converter delivers two independently adjustable 5V outputs (VCC2 and VL2), each with precision current limiting via external resistors on IVCC2 and IVL2 pins.
It supports unidirectional and bidirectional SPI communication at up to 8MHz (unidirectional) or 4MHz (bidirectional), with propagation delays under 100ns and ±50ns pulse width uncertainty. The logic side accepts 1.62V–5.5V VL, while the isolated side provides 0.6V–5.5V VCC2 and 1.8V–5.5V VL2 regulated outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2500VRMS for 1 minute - meets reinforced insulation requirements for industrial safety standards |
| SPI Data Rate | 4MHz bidirectional / 8MHz unidirectional - supports high-speed sensor or DAC interfaces without protocol translation |
| Regulated Outputs | VCC2 and VL2: 5V nominal, adjustable down to 0.6V and 1.8V respectively - powers isolated peripherals with flexible voltage matching |
| Output Current | ≥100mA per regulator - sufficient to drive multiple isolated ICs (e.g., ADCs, gate drivers, sensors) |
| Common-Mode Immunity | 30kV/µs - ensures robust operation in high-noise motor drives or power electronics environments |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient conditions without derating |
| Package | 32-pin BGA, 15mm × 11.25mm × 3.42mm - compact footprint with bottom-side thermal pad for PCB heat dissipation |
Pinout & Package
Package: 32-pin Ball Grid Array (BGA), 15mm × 11.25mm × 3.42mm, with exposed thermal pad on bottom surface. Thermal resistance θJCbottom = 8.1°C/W enables efficient heat transfer to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDO (A1) | SPI Serial Data Output | Logic-side output connected across isolation barrier to SDO2; high-impedance on failure |
| DO2 (A2) | Digital Output | Isolates logic-level signal to I2; fails high-impedance for fault containment |
| SCK (A3) | SPI Clock Input | Unidirectional clock input referenced to VL; requires no external pull-up |
| SDI (A4) | SPI Data Input | Logic input mapped to SDI2; must not be left floating |
| CS (A5) | SPI Chip Select | Active-low enable for isolated SPI peripheral; mapped to CS2 |
| SDOE (A6) | Data Output Enable | Controls SDO tri-state; low = enabled, high = high-Z |
| ON (A7) | Global Enable | High = active power/data; low = logic reset + isolated side powered down |
| VL (A8) | Logic Supply | 1.62V–5.5V interface rail for all logic-side pins; internally bypassed with 1µF |
| DO1 (B1) | Digital Output | Maps to I1 on isolated side; fails high-impedance on barrier fault |
| VCC (B7–B8) | Main Supply | 4.5V–5.5V input powering both sides via internal DC/DC; bypassed with 2.2µF |
| GND (B2–B6) | Logic Ground | Reference for logic-side signals; electrically separate from GND2 |
| SDO2 (L1) | SPI Data Input | Isolated-side input receiving SDO; fails low on barrier fault |
| I2 (L2) | Digital Input | Receives DO2 signal; maps directly to logic state of DO2 |
| SCK2 (L3) | SPI Clock Output | Push-pull clock output to isolated peripherals; fails low on fault |
| SDI2 (L4) | SPI Data Output | Drives logic-side SDI; fails low on barrier fault |
| CS2 (L5) | SPI Chip Select Output | Active-low select for isolated device; fails high on fault |
| VL2 (L6) | Adjustable Isolated Supply | 1.8V–5.5V output; set by resistor on IVL2; bypassed with 4.7µF |
| IVCC2 (L7) | VCC2 Current Limit Adjust | Resistor-to-GND2 sets VCC2 current limit (49–115mA); bypassed with 10nF |
| VCC2 (L8) | Adjustable Isolated Supply | 0.6V–5.5V output; set by resistor on IVCC2; bypassed with 4.7µF |
| I1 (K1) | Digital Input | Receives DO1 signal; maps directly to logic state of DO1 |
| GND2 (K2–K5) | Isolated Ground | Reference for isolated-side signals; galvanically separated from GND |
| AVL2 (K6) | VL2 Voltage Adjust | 600mV reference pin for setting VL2 output voltage with external resistor divider |
| IVL2 (K7) | VL2 Current Limit Adjust | Resistor-to-GND2 sets VL2 current limit (49–115mA); bypassed with 10nF |
| AVCC2 (K8) | VCC2 Voltage Adjust | 600mV reference pin for setting VCC2 output voltage with external resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated DC/DC converter, regulators, decoupling capacitors, and isolation barrier eliminate need for discrete magnetics or LDOs |
| Dual independent 5V regulators | VCC2 and VL2 each deliver ≥100mA with programmable current limit and voltage adjustment via external resistors |
| 30kV/µs common-mode transient immunity | Ensures uninterrupted SPI communication during fast-switching events in motor drives or inverters |
| Fail-safe isolation barrier behavior | All digital outputs default to defined states (high-Z, high, or low) on communication failure - prevents undefined system behavior |
| Industrial temperature grade (–40°C to +85°C) | Qualified for continuous operation in harsh environments without thermal derating or external cooling |
Applications
| Programmable Logic Controller (PLC) I/O Modules | Industrial Motor Drive Feedback Interface |
|---|---|
Use Scenario: Isolating SPI-configured analog input modules (e.g., 16-bit ADCs) from main controller CPU to prevent ground loop noise coupling. IC Role / Device Role / Timing Role: SPI µModule isolator providing galvanic separation between field-side sensors and backplane bus, with dual 5V supplies powering isolated ADC and level-shifting circuitry. Use Value: Enables 2500VRMS isolation compliance and 30kV/µs transient immunity, eliminating measurement errors caused by motor switching noise. | Use Scenario: Connecting isolated current/voltage sensing ICs (e.g., isolated sigma-delta modulators) to FPGA-based PWM controllers in servo drives. IC Role / Device Role / Timing Role: High-speed SPI isolator delivering 4MHz bidirectional data transfer between sensing front-end and control logic, with dedicated 5V rails for modulator and digital interface. Use Value: Maintains timing integrity (<100ns propagation delay) and prevents latch-up during 10kHz+ switching transients in IGBT gate driver domains. |
| Test & Measurement Equipment | Energy Metering Data Acquisition |
Use Scenario: Isolating high-precision ADCs and DACs in benchtop multimeters or source-measure units from USB/Ethernet host interfaces. IC Role / Device Role / Timing Role: Dual-supply isolator supplying clean 5V to isolated ADC/DAC while transmitting SPI commands and results across barrier at 8MHz unidirectional rate. Use Value: Eliminates measurement offset drift caused by ground potential differences between instrument chassis and PC host, improving DC accuracy to <10ppm. | Use Scenario: Isolating metrology SoCs (e.g., ADE7912) from microcontroller-based communication stacks in smart electricity meters. IC Role / Device Role / Timing Role: SPI isolator with programmable 5V regulators powering isolated metrology IC and its crystal oscillator, enabling secure firmware updates over isolated UART/SPI bridge. Use Value: Meets IEC 62053-21 and UL 61010-1 reinforced insulation requirements while supporting 100-year meter lifetime with no external component aging concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI isolator with integrated power applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6403ARWZ | Quad-channel digital isolator only; no integrated regulators - requires external isolated DC/DC or LDOs | Higher channel count but lacks power integration; suitable when board space allows discrete power design | Select ADUM6403ARWZ if system already includes isolated power or needs >2 data channels; avoid if dual 5V regulation is required. |
| SI8642ED-B-IS | 4-channel digital isolator with integrated 5V DC/DC; lower output current (60mA) and no voltage adjust capability | Fixed 5V outputs only; insufficient for designs requiring <5V isolated rails or >60mA per rail | Choose SI8642ED-B-IS for cost-sensitive, fixed-voltage applications with modest current demand; not suitable for adjustable or high-current use cases. |
Compared with ADUM6403ARWZ and SI8642ED-B-IS, the LTM2887IY-5S#PBF uniquely combines SPI-optimized timing, dual adjustable 5V regulators (100mA each), and programmable current limiting - enabling single-component isolation + power in space-constrained industrial systems without external magnetics or LDOs.
Availability
LTM2887IY-5S#PBF is available at Aetrix Electronics and suitable for industrial automation, test equipment, and energy metering applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature grade performance.
Supply support for LTM2887IY-5S#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTM2887 product line delivers complete isolated µModule solutions combining signal isolation, power conversion, and regulation in a single BGA package - designed specifically for industrial systems needing robust, compact, and certified galvanic separation.
FAQ
What interface protocol does the LTM2887IY-5S#PBF support?
The LTM2887IY-5S#PBF supports SPI (Serial Peripheral Interface) only - specifically configured for master-mode SPI communication with 4MHz bidirectional or 8MHz unidirectional data rates. It does not support I2C; that functionality is provided in the LTM2887IY-5I#PBF variant. Pin assignments (e.g., SCK, SDI, SDO, CS) and timing specifications are optimized exclusively for SPI protocols.
Can the LTM2887IY-5S#PBF generate isolated supplies other than 5V?
Yes, the LTM2887IY-5S#PBF can generate isolated supplies from 0.6V to 5.5V on VCC2 and from 1.8V to 5.5V on VL2 using external resistor dividers connected to AVCC2/AVL2 pins. The nominal 5V outputs are adjustable downward; for example, VL2 can be set to 3.3V for powering isolated microcontrollers, and VCC2 can be trimmed to 2.5V for ADC reference domains - all without external regulators.
What is the maximum load current per isolated supply on the LTM2887IY-5S#PBF?
Each isolated supply (VCC2 and VL2) delivers ≥100mA continuously under full industrial temperature range (–40°C to +85°C). With external current-limit resistors on IVCC2 and IVL2 pins, the actual current limit can be precisely set to 49mA, 71mA, or 91mA (typical) depending on resistor value - allowing design margin control and inrush limiting for downstream capacitive loads.
Does the LTM2887IY-5S#PBF require external decoupling capacitors?
Yes, external decoupling is required: 2.2µF on VCC (logic side), 1µF on VL (logic supply), and 4.7µF on each isolated supply (VCC2 and VL2). These values are specified in the datasheet for stable regulation and EMI suppression. While the µModule integrates internal bypassing (10nF on IVCC2/IVL2), the bulk capacitance must be placed externally per layout guidelines to maintain ripple <1mVRMS at 100mA load.
How does the LTM2887IY-5S#PBF behave during an isolation barrier failure?
On isolation barrier failure, the LTM2887IY-5S#PBF implements defined fail-safe states: logic-side outputs (SDO, DO1, DO2) go high-impedance; isolated-side outputs (SCK2, SDI2, CS2) default to low, low, and high respectively; and both VCC2 and VL2 regulators shut down. This prevents undefined logic states or unintended peripheral activation, supporting functional safety requirements in industrial control systems.
LTM2887IY-5S#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 32-BBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- SPI
- 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:
- 4MHz, 8MHz
- Propagation Delay tpLH / tpHL (Max):
- 100ns, 100ns
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 3ns, 3ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-BGA (15x11.25)
LTM2887IY-5S#PBF FAQ
1.How can I place an order for LTM2887IY-5S#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM2887IY-5S#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 LTM2887IY-5S#PBF reliable?
The price and inventory of LTM2887IY-5S#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM2887IY-5S#PBF is usually 5 days.
3.What payment methods are accepted for LTM2887IY-5S#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM2887IY-5S#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM2887IY-5S#PBF?
LTM2887IY-5S#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM2887IY-5S#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 LTM2887IY-5S#PBF?
For technical support, including LTM2887IY-5S#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM2887IY-5S#PBF requirements.
6.How does Aetrix verify that LTM2887IY-5S#PBF is sourced from the original manufacturer or authorized distributors?
All LTM2887IY-5S#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 LTM2887IY-5S#PBF meets industry standards.
7.What is the process for return or replacement of LTM2887IY-5S#PBF?
All LTM2887IY-5S#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM2887IY-5S#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 LTM2887IY-5S#PBF part is unused and in its original packaging.
Return procedure for LTM2887IY-5S#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTM2887IY-5S#PBF Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO6741FQDWRQ1
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ISO7741DWR
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ISO7741FDWR
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