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Analog Devices Inc. LTM2886IY-3S#PBF
- Part No.:
- LTM2886IY-3S#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 32-BBGA Module
- Datasheet:
-
LTM2886IY-3S#PBF.pdf
- Description:
- DGTL ISOL 2500VRMS 6CH SPI 32BGA
- Quantity:
- Payment:
- Shipping:
Inventory:119
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Product details
Overview
LTM2886IY-3S#PBF from Analog Devices is a galvanically isolated µModule digital isolator with integrated ±5V fixed and 3V–5.5V adjustable isolated power supplies, supporting SPI interface at up to 8MHz unidirectional or 4MHz bidirectional rates. It operates from a single 3.3V input, delivers >100mA per rail on the isolated side, and provides 2500VRMS isolation for ground-loop breaking in industrial sensor interfaces and PLC I/O modules.
For engineers reviewing the LTM2886IY-3S#PBF datasheet, LTM2886IY-3S#PBF pinout, LTM2886IY-3S#PBF application, or LTM2886IY-3S#PBF equivalent, key selection criteria include its 32-pin BGA package, 3V–3.6V primary supply range, SPI-only logic compatibility, 30kV/µs common-mode transient immunity, and integrated isolated DC/DC converter eliminating external magnetics.
Technical Context
The LTM2886IY-3S#PBF implements dual-channel SPI isolation using transformer-coupled signal transmission across a reinforced dielectric barrier. Its isolated side integrates three independent regulated supplies: V+ (5V), V– (–5V), and VCC2 (adjustable 3V–5.5V), each rated for ≥100mA continuous output with <100mV load regulation.
Signal integrity is maintained via push-pull outputs on SCK2, SDI2, CS2, and O1 with VOH ≥ VCC2 – 0.4V and VOL ≤ 0.4V at 4mA, while propagation delay is tightly controlled at 35–100ns (tPLH/tPHL) with ±50ns pulse width uncertainty on SDO/SDI2/CS2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2500VRMS for 1 minute; enables safe interfacing between 560VPEAK working voltage domains |
| SPI Data Rate | Up to 8MHz unidirectional / 4MHz bidirectional; supports high-speed ADC/DAC control without timing margin loss |
| Isolated Supplies | V+ = 5V ±2%, V– = –5V ±2%, VCC2 = 3V–5.5V adjustable; all deliver ≥100mA with <1mVRMS ripple at full load |
| Common-Mode Immunity | 30kV/µs; ensures robust operation during fast transients in motor drives and HV inverters |
| Supply Range | VCC = 3V–3.6V; compatible with standard 3.3V system rails without level-shifting |
| Logic Compatibility | VL = 1.62V–5.5V; allows direct connection to 1.8V, 2.5V, 3.3V, or 5V controllers |
| Package | 32-pin BGA (15mm × 11.25mm × 3.42mm); low-profile solution for space-constrained industrial PCBs |
Pinout & Package
32-pin Ball Grid Array (BGA) package measuring 15mm × 11.25mm × 3.42mm with bottom-side thermal pad; RoHS-compliant SAC305 solder finish; MSL Level 3 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDO (A1) | SPI Serial Data Output | Logic-side output connected to SDO2 across isolation barrier; high-impedance when SDOE = high |
| DO2 (A2) | Digital Output | Isolates DI1 signal to I2; high-impedance on communication failure |
| SCK (A3) | SPI Clock Input | Drives isolated SCK2; must not be left floating |
| SDI (A4) | SPI Data Input | Receives data from SDI2; translates logic state directly to SDI2 |
| CS (A5) | SPI Chip Select | Controls isolated CS2; defaults high on failure |
| SDOE (A6) | Data Output Enable | Active-low control of SDO driver; required for tri-state bus sharing |
| ON (A7) | Enable Control | High = active power/data; low = reset + isolated side powered down |
| VL (A8) | Logic Supply | 1.62V–5.5V interface rail for all logic pins; internally bypassed with 1µF |
| DO1 (B1) | Digital Output | Isolates DI1 signal to I1; high-impedance on failure |
| VCC (B7–B8) | Main Supply | 3V–3.6V input powering both sides via integrated DC/DC; bypassed with 2.2µF |
| I2 (L1) | Digital Input | Receives DO2 signal; translates logic state directly to DO2 |
| SCK2 (L3) | SPI Clock Output | Push-pull output driving logic-side SCK; no external pull-up needed |
| SDI2 (L4) | SPI Data Output | Drives logic-side SDI; defaults low on failure |
| CS2 (L5) | SPI Chip Select Output | Drives logic-side CS; defaults high on failure |
| VCC2 (L6) | Adjustable Isolated Supply | 3V–5.5V output set by AVCC2 divider; ≥100mA capability |
| V– (L7) | Negative Isolated Supply | –5V ±2% rail for op-amp biasing or analog circuitry |
| V+ (L8) | Positive Isolated Supply | 5V ±2% rail for isolated logic and sensors |
| I1 (K1) | Digital Input | Receives DO1 signal; translates logic state directly to DO1 |
| AVCC2 (K6) | VCC2 Adjustment | 1.22V reference pin for external resistor divider to set VCC2 voltage |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated transformer-based DC/DC and signal isolation eliminate discrete magnetics, regulators, and optocouplers |
| Programmable isolated VCC2 | VCC2 voltage set via external resistor divider on AVCC2 pin, enabling custom supply voltages from 3V to 5.5V |
| High-speed SPI isolation | 8MHz unidirectional data rate supports real-time control loops in servo drives and power converters |
| ±10kV ESD protection | HBM rating across isolation barrier prevents latch-up during handling and field ESD events |
| Low shutdown current | <10µA quiescent current in ON = low state enables battery-backed isolation in standby mode |
Applications
| Industrial Sensor Interface | PLC Digital I/O Module |
|---|---|
Use Scenario: Isolating 4–20mA transmitter signals in hazardous-area process instrumentation. IC Role / Device Role / Timing Role: Provides galvanic isolation between field-side analog front-end and controller-side SPI interface while supplying isolated ±5V for signal conditioning op-amps. Use Value: Eliminates ground loops causing measurement drift; 30kV/µs CMTI prevents false triggering during lightning-induced surges. | Use Scenario: Digitally isolating input/output channels in modular programmable logic controllers. IC Role / Device Role / Timing Role: SPI-isolates microcontroller GPIO expansion ports while delivering isolated 5V/–5V for relay drivers and opto-LED biasing. Use Value: Enables hot-swap I/O modules without system reset; integrated power reduces board area by >40% vs discrete isolator + regulator solutions. |
| Motor Drive Current Sensing | Isolated Data Acquisition System |
Use Scenario: Isolating shunt amplifier outputs in three-phase inverter gate driver boards. IC Role / Device Role / Timing Role: Transmits ADC conversion results across isolation barrier using SPI protocol while powering isolated ADC reference and buffer stages. Use Value: Maintains 16-bit measurement accuracy under 5kV common-mode transients; 4MHz bidirectional SPI supports oversampled current loop updates at 20kHz. | Use Scenario: Building compact, high-channel-count data loggers for vibration monitoring in rotating machinery. IC Role / Device Role / Timing Role: Isolates multiple SPI-connected sigma-delta ADCs from host MCU while providing isolated 3.3V for ADC digital interfaces. Use Value: Reduces component count by integrating six-channel isolation + triple isolated power in one BGA; 15mm × 11.25mm footprint fits dense sensor node layouts. |
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 | Quad-channel isolator with 500mW isolated power; no negative supply; 25Mbps data rate but SPI-specific timing not guaranteed | Best for high-channel-count digital isolation where ±5V analog biasing is unnecessary | Select when needing >4 isolated data channels and lower power delivery (500mW vs 1.5W) |
| SI8661ED-B-IS | 6-channel isolator with 500mW isolated DC/DC; no adjustable VCC2 or negative rail; 150Mbps data rate but requires external LDO for precision analog supplies | Suitable for pure digital I/O isolation in factory automation where analog supply rails are generated separately | Select when prioritizing maximum data throughput over analog supply flexibility |
Compared with ADUM6401ARWZ and SI8661ED-B-IS, the LTM2886IY-3S#PBF uniquely delivers integrated ±5V and adjustable 3V–5.5V isolated supplies in a single package-enabling direct powering of isolated op-amps, ADCs, and DACs without external regulators-while maintaining SPI-timed deterministic latency critical for closed-loop control.
Availability
LTM2886IY-3S#PBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC digital I/O modules, motor drive current sensing, and isolated data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTM2886IY-3S#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 LTM2886 product line delivers complete isolated µModule solutions combining signal isolation, DC/DC conversion, and precise power regulation in single-package form factors for demanding industrial and instrumentation applications.
FAQ
What is the maximum supported SPI clock frequency for LTM2886IY-3S#PBF?
The LTM2886IY-3S#PBF supports up to 8MHz unidirectional SPI communication and 4MHz bidirectional SPI operation. These rates are guaranteed across the full industrial temperature range (–40°C to +85°C) with tPLH/tPHL propagation delay bounded at 35–100ns and ±50ns pulse width uncertainty on SDO, SDI2, and CS2 signals. The device does not support I2C mode-its logic option is SPI-only as indicated by the "S" suffix in LTM2886IY-3S#PBF.
Can LTM2886IY-3S#PBF generate a negative supply for analog circuitry?
Yes, the LTM2886IY-3S#PBF provides a dedicated –5V isolated supply (V– pin, L7) regulated to ±2% with ≥100mA output capability and <150mV load regulation. This rail is internally generated from VCC via an isolated DC/DC converter and requires only a 2.2µF ceramic capacitor on V–. It is specifically designed to power op-amp dual supplies, ADC reference buffers, and other analog circuitry requiring clean negative bias-eliminating the need for external charge pumps or inverting regulators.
How is the adjustable 3V–5.5V isolated supply (VCC2) configured on LTM2886IY-3S#PBF?
The VCC2 output voltage on LTM2886IY-3S#PBF is set using an external resistor divider connected to the AVCC2 pin (K6), which references a precise 1.22V internal bandgap. For example, a 10kΩ resistor from AVCC2 to VCC2 and 20.5kΩ from AVCC2 to GND2 sets VCC2 to 5.0V. The datasheet specifies that the adjust pin voltage remains stable at 1.22V ±5mV across temperature and load, enabling accurate, stable output voltage programming without trimming or calibration.
What isolation certification does LTM2886IY-3S#PBF meet?
The LTM2886IY-3S#PBF is UL-CSA recognized (File #E151738) with a rated dielectric insulation voltage of 2500VRMS for 1 minute and a maximum continuous working voltage of 560VPEAK. It achieves 30kV/µs common-mode transient immunity and features 9.5mm creepage distance, 0.06mm distance through insulation, and 600VRMS comparative tracking index-meeting reinforced insulation requirements for industrial equipment per IEC 61000-4-5 and IEC 60747-17 standards.
Does LTM2886IY-3S#PBF require external bypass capacitors?
Yes, LTM2886IY-3S#PBF requires specific external bypass capacitors for stable operation: a 1µF ceramic capacitor on VL (A8), and 2.2µF ceramics on VCC (B7–B8), VCC2 (L6), V+ (L8), and V– (L7). These values are specified in the datasheet's "Recommended Operating Conditions" and "Layout Guidelines" sections. Omitting or undersizing these capacitors risks power rail instability, increased output ripple (>1mVRMS), and degraded transient response during 100mA load steps.
LTM2886IY-3S#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:
- 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:
- 3V ~ 3.6V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-BGA (15x11.25)
LTM2886IY-3S#PBF FAQ
1.How can I place an order for LTM2886IY-3S#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM2886IY-3S#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-3S#PBF reliable?
The price and inventory of LTM2886IY-3S#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-3S#PBF is usually 5 days.
3.What payment methods are accepted for LTM2886IY-3S#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM2886IY-3S#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM2886IY-3S#PBF?
LTM2886IY-3S#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM2886IY-3S#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-3S#PBF?
For technical support, including LTM2886IY-3S#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM2886IY-3S#PBF requirements.
6.How does Aetrix verify that LTM2886IY-3S#PBF is sourced from the original manufacturer or authorized distributors?
All LTM2886IY-3S#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-3S#PBF meets industry standards.
7.What is the process for return or replacement of LTM2886IY-3S#PBF?
All LTM2886IY-3S#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM2886IY-3S#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-3S#PBF part is unused and in its original packaging.
Return procedure for LTM2886IY-3S#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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