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Analog Devices Inc. LTM2892CY-S#PBF
- Part No.:
- LTM2892CY-S#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 24-BBGA
- Datasheet:
-
LTM2892CY-S#PBF.pdf
- Description:
- DGTL ISOL 3500VRMS 6CH SPI 24BGA
- Quantity:
- Payment:
- Shipping:
Inventory:135
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Product details
Overview
LTM2892CY-S#PBF from Analog Devices (formerly Linear Technology) is a galvanically isolated 6-channel SPI µModule digital isolator in a 24-pin BGA package. It provides 3500VRMS isolation, supports 4MHz/8MHz SPI data rates, operates with independent 3V–5.5V supply rails and 1.62V–5.5V logic supplies, and delivers high common-mode transient immunity of 50kV/μs - ideal for isolated industrial sensor interfaces and PLC I/O modules.
For engineers reviewing the LTM2892CY-S#PBF datasheet, LTM2892CY-S#PBF pinout, LTM2892CY-S#PBF application, or LTM2892CY-S#PBF equivalent, key selection considerations include its SPI-specific channel mapping (INA/INB/INC → OUTA/OUTB/OUTC), dual enable control (ON1/ON2), output-enable terminals (EOUTD/EOUTA), and compatibility with 1.62V–5.5V logic interfacing across both sides of the isolation barrier.
Technical Context
The LTM2892CY-S#PBF implements serial packet-based encoding for three bidirectional logic channels per side, with deterministic propagation delay (35–100ns) and pulse width uncertainty ≤50ns. Its coupled inductor isolation architecture eliminates external magnetics while meeting UL-CSA recognition (File #E151738) and supporting 850VPEAK continuous working voltage.
It features independent power domains: VCC1/VCC2 (3V–5.5V main supplies) and VL1/VL2 (1.62V–5.5V logic interface supplies), each internally bypassed (1.0µF and 0.22µF respectively). Shutdown current is <10µA when ON1/ON2 are low, and ESD rating is ±15kV HBM across the isolation barrier.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3500VRMS for 1 minute - meets reinforced insulation requirements for industrial safety standards |
| SPI Data Rate | 4MHz unidirectional / 8MHz bidirectional - supports standard and fast-mode SPI peripheral communication |
| Common-Mode Transient Immunity | 50kV/μs - ensures reliable operation during fast ground-potential shifts in motor drives or power converters |
| Logic Supply Range | 1.62V to 5.5V on both sides - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| Propagation Delay | 35ns to 100ns (INx → OUTx) - guarantees timing predictability for real-time control loops |
| Package | 24-pin BGA (9mm × 6.25mm × 2.91mm) - compact surface-mount footprint with integrated decoupling |
| Operating Temperature | 0°C to 70°C (CY grade) - qualified for commercial and light-industrial ambient conditions |
Pinout & Package
Package: 24-pin BGA (9mm × 6.25mm × 2.91mm), RoHS-compliant, moisture-sensitive, tray-packaged.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA (A1) | Digital Input (Logic Side) | Maps to OUTA on isolated side; supports 1.62V–5.5V logic levels; connect to GND1 or VL1 if unused |
| INB (A2) | Digital Input (Logic Side) | Maps to OUTB on isolated side; same voltage range and biasing as INA |
| INC (A3) | Digital Input (Logic Side) | Maps to OUTC on isolated side; enables full 3-channel input capability |
| ON1 (A4) | Enable Input (Logic Side) | Active-high enable for logic-side operation; drives all outputs into high-Z when low |
| VL1 (A5) | Logic Supply (Logic Side) | Powers SCLIN/SDA1/INA/INB/INC/OUTD/OUTE/OUTF/EOUTD/ON1; internally bypassed with 0.22µF |
| VCC1 (A6) | Main Supply (Logic Side) | Powers internal isolator core; 3V–5.5V range; internally bypassed with 1.0µF |
| OUTD (B1) | Digital Output (Logic Side) | Maps to IND on isolated side; high-Z during isolation fault |
| OUTE (B2) | Digital Output (Logic Side) | Maps to INE on isolated side; supports bidirectional signal routing |
| OUTF (B3) | Digital Output (Logic Side) | Maps to INF on isolated side; completes 3-channel output set |
| EOUTD (B4) | Output Enable (Logic Side) | Controls OUTD tri-state; high = high-Z, low = active drive |
| GND1 (B5–B6) | Logic Ground | Reference for logic-side signals and supplies; separate from isolated ground |
| OUTA (H1) | Digital Output (Isolated Side) | Maps to INA; defaults low during isolation failure |
| OUTB (H2) | Digital Output (Isolated Side) | Maps to INB; defaults low during isolation failure |
| OUTC (H3) | Digital Output (Isolated Side) | Maps to INC; defaults high during isolation failure |
| EOUTA (H4) | Output Enable (Isolated Side) | Controls OUTA tri-state; high = high-Z, low = active drive |
| GND2 (H5–H6) | Isolated Ground | Reference for isolated-side signals; galvanically separated from GND1 |
| IND (J1) | Digital Input (Isolated Side) | Maps to OUTD; connects to external isolated peripherals |
| INE (J2) | Digital Input (Isolated Side) | Maps to OUTE; supports multi-sensor or multi-actuator feedback |
| INF (J3) | Digital Input (Isolated Side) | Maps to OUTF; completes isolated 3-channel input path |
| ON2 (J4) | Enable Input (Isolated Side) | Active-high enable for isolated side; resets outputs to defined states when low |
| VL2 (J5) | Logic Supply (Isolated Side) | Powers OUTA/OUTB/OUTC/IND/INE/INF/EOUTA/ON2; 1.62V–5.5V, 0.22µF bypass |
| VCC2 (J6) | Main Supply (Isolated Side) | Powers isolated-side isolator core; 3V–5.5V, 1.0µF bypass |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated 1.0µF and 0.22µF bypass capacitors eliminate discrete decoupling, reducing BOM count and layout area |
| Independent logic supply pins (VL1/VL2) | Enables mixed-voltage systems (e.g., 1.8V MCU ↔ 5V actuator) without external level translators |
| Output-enable terminals (EOUTD/EOUTA) | Allows dynamic tri-stating of individual channels for bus arbitration or hot-swap-safe operation |
| Low shutdown current (<10µA) | Supports energy-sensitive applications such as battery-backed I/O modules or always-on monitoring nodes |
| UL-CSA recognized (File #E151738) | Validates compliance with industrial safety standards for reinforced insulation in end equipment certification |
| High-speed SPI isolation (4MHz/8MHz) | Meets timing requirements for real-time sensor acquisition and closed-loop control in motor drives and power supplies |
Applications
| Industrial Sensor Interface | PLC Digital I/O Module |
|---|---|
Use Scenario: Isolating analog-to-digital converter (ADC) SPI interface in high-noise factory environments with large ground potential differences. IC Role / Device Role / Timing Role: SPI µModule isolator providing galvanic separation between host MCU and remote ADC, preserving 4MHz clock integrity and sub-100ns timing alignment. Use Value: Eliminates ground loop errors and maintains measurement accuracy despite >50kV/μs transients from nearby VFDs or welding equipment. | Use Scenario: Digitally isolating input/output lines in programmable logic controller backplane modules handling 24V DC field signals. IC Role / Device Role / Timing Role: 6-channel logic isolator enabling simultaneous status reporting and command execution across isolation barrier with deterministic latency. Use Value: Prevents noise coupling between control logic and field-side circuits, ensuring reliable state capture and actuation in harsh EMI environments. |
| Motor Drive Feedback Interface | Medical Isolated Data Acquisition |
Use Scenario: Transmitting position encoder data (A/B/Z quadrature) and fault signals from inverter stage to controller in servo drives. IC Role / Device Role / Timing Role: High-CMTI digital isolator delivering synchronized, jitter-free channel timing for real-time motion control loops. Use Value: Maintains encoder edge fidelity under rapid common-mode dv/dt events, preventing position error accumulation during acceleration/deceleration. | Use Scenario: Isolating patient-connected sensor front-ends (ECG, EEG) from USB/Bluetooth data transmission circuitry in portable diagnostics devices. IC Role / Device Role / Timing Role: Safety-certified digital isolator enabling low-power, low-noise data transfer while meeting IEC 60601 creepage/clearance requirements. Use Value: Provides 3500VRMS reinforced insulation and 5mm creepage distance to satisfy medical device isolation safety standards without custom transformer design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM3401CRWZ | 4-channel, 50Mbps, 2.5kVRMS isolation; requires external 0.1µF bypass caps; no integrated logic supply pins | Lower isolation rating and no VL1/VL2 flexibility; suited for lower-risk consumer-grade isolation | Select when cost sensitivity outweighs need for integrated decoupling and wide logic voltage support |
| SI8641ED-B-IS | 4-channel, 150Mbps, 5kVRMS; CMOS-based capacitive isolation; 1.71V–5.5V logic range; no dedicated output-enable pins | Higher speed but lacks EOUTD/EOUTA for dynamic channel control; different failure-state behavior (all outputs float) | Prefer for high-bandwidth digital links where tri-state control is not required and higher isolation voltage is critical |
Compared with ADUM3401CRWZ and SI8641ED-B-IS, the LTM2892CY-S#PBF uniquely integrates decoupling capacitance, supports independent 1.62V–5.5V logic supplies per side, and provides dedicated output-enable terminals - making it optimal for space-constrained, mixed-voltage industrial SPI interfaces requiring robust fault management.
Availability
LTM2892CY-S#PBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC I/O modules, motor drive feedback systems, and medical data acquisition requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTM2892CY-S#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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The LTM2892CY-S#PBF belongs to ADI's µModule isolator product line, engineered to simplify system-level isolation by integrating transformers, regulators, and protection circuitry into compact, fully tested BGA packages for demanding industrial and medical applications.
FAQ
What is the maximum SPI clock frequency supported by the LTM2892CY-S#PBF?
The LTM2892CY-S#PBF supports up to 4MHz for bidirectional SPI communication and 8MHz for unidirectional SPI operation. These data rates are guaranteed over the full 0°C to 70°C operating temperature range and assume CL = 15pF loading. The device achieves this using serialized packet encoding across its three-channel paths, with propagation delay tightly bounded at 35ns to 100ns.
Does the LTM2892CY-S#PBF require external bypass capacitors?
No, the LTM2892CY-S#PBF does not require external bypass capacitors. It integrates 1.0µF ceramic capacitors on VCC1 and VCC2, and 0.22µF capacitors on VL1 and VL2 - all internally connected. This eliminates four external components, reduces PCB area, and improves reliability by removing solder joint failure points associated with discrete decoupling.
How does the LTM2892CY-S#PBF handle isolation faults?
During an isolation barrier fault, the LTM2892CY-S#PBF places logic-side outputs (OUTD/OUTE/OUTF) and isolated-side outputs (OUTA/OUTB/OUTC) into high-impedance or defined default states: OUTA and OUTB default low, while OUTC defaults high. This fail-safe behavior prevents undefined logic states from propagating to downstream circuitry and supports safe system shutdown or diagnostic recovery protocols.
Can the LTM2892CY-S#PBF interface with 1.8V microcontrollers?
Yes, the LTM2892CY-S#PBF supports 1.62V to 5.5V logic supplies on both sides (VL1 and VL2), making it fully compatible with 1.8V microcontrollers. When VL1 = 1.8V, input thresholds scale to ~0.45V (low) and ~1.26V (high), and output drive strength remains sufficient for standard CMOS loads - eliminating the need for external level-shifting circuitry.
What safety certifications does the LTM2892CY-S#PBF hold?
The LTM2892CY-S#PBF is UL-CSA recognized under File #E151738, confirming compliance with reinforced insulation requirements. It provides 3500VRMS isolation (1-minute test), 850VPEAK maximum continuous working voltage, 5mm creepage distance, and meets IEC 60112 CTI ≥600V. These ratings validate its suitability for industrial equipment requiring functional and basic insulation per IEC 61000-4-5 and IEC 61800-5-1.
LTM2892CY-S#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 24-BBGA
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- SPI
- Isolated Power:
- No
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 3/3
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3500Vrms
- Common Mode Transient Immunity (Min):
- 50kV/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 ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-BGA (9x6.25)
LTM2892CY-S#PBF FAQ
1.How can I place an order for LTM2892CY-S#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM2892CY-S#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 LTM2892CY-S#PBF reliable?
The price and inventory of LTM2892CY-S#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM2892CY-S#PBF is usually 5 days.
3.What payment methods are accepted for LTM2892CY-S#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM2892CY-S#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM2892CY-S#PBF?
LTM2892CY-S#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM2892CY-S#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 LTM2892CY-S#PBF?
For technical support, including LTM2892CY-S#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM2892CY-S#PBF requirements.
6.How does Aetrix verify that LTM2892CY-S#PBF is sourced from the original manufacturer or authorized distributors?
All LTM2892CY-S#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 LTM2892CY-S#PBF meets industry standards.
7.What is the process for return or replacement of LTM2892CY-S#PBF?
All LTM2892CY-S#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM2892CY-S#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 LTM2892CY-S#PBF part is unused and in its original packaging.
Return procedure for LTM2892CY-S#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTM2892CY-S#PBF Tags
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