My Inquiry
My Account
Analog Devices Inc. LTM2894CY#PBF
- Part No.:
- LTM2894CY#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 24-BGA
- Datasheet:
-
LTM2894CY#PBF.pdf
- Description:
- DGTL ISOL 7500VRMS 2CH USB 24BGA
- Quantity:
- Payment:
- Shipping:
Inventory:103
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTM2894CY#PBF from Analog Devices is a galvanically isolated USB 2.0 μModule transceiver in a 24-lead BGA package (22 mm × 6.25 mm), supporting full-speed (12 Mbps) and low-speed (1.5 Mbps) operation with auto-speed detection, 7500 VRMS isolation, and ±20 kV HBM ESD protection on both USB interfaces. It enables robust host, hub, or peripheral isolation in industrial data acquisition and medical systems where ground potential differences exceed safe limits.
For engineers reviewing the LTM2894CY#PBF datasheet, LTM2894CY#PBF pinout, LTM2894CY#PBF application, or LTM2894CY#PBF equivalent, key selection criteria include its reinforced insulation rating (CSA/UL/IEC 62368-1), 50 kV/µs common-mode transient immunity, dual 3.3 V LDO outputs (VLO/VLO2), and integrated 1.5 kΩ upstream pull-up / 15 kΩ downstream pull-down resistors eliminating external components.
Technical Context
The LTM2894CY#PBF implements bidirectional USB signal isolation using coreless transformer-based µModule technology, encoding data into pulses across the barrier with error checking and fail-safe shutdown. Its automatic speed detection senses downstream idle states to configure upstream pull-up resistors-enabling correct bus enumeration without host-side firmware changes.
It maintains USB timing integrity via consistent propagation delay (60–115 ns for full speed, 200–300 ns for low speed) and supports suspend mode with <2 mA VBUS current draw. Isolation barrier parameters include 1414 VPEAK working voltage, 17.4 mm creepage, and 0.2 mm distance through insulation-certified for 2 MOPP in medical applications per IEC 60601-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 7500 VRMS for 1 minute - meets CSA/UL/IEC reinforced insulation requirements for industrial and medical safety compliance. |
| Data Rates | 12 Mbps (full speed) and 1.5 Mbps (low speed) - fully compatible with USB 2.0 specification for host, hub, and peripheral roles. |
| Common-Mode Immunity | 50 kV/µs minimum - ensures uninterrupted communication during fast ground-potential transients in noisy industrial environments. |
| VLO / VLO2 Outputs | 3.3 V ±0.25 V, 10 mA max - provides regulated reference supplies for local logic and USB interface circuitry on both sides of the barrier. |
| ESD Protection | ±20 kV HBM on D1+/D1–/D2+/D2– pins - eliminates need for external TVS diodes in standard USB port designs. |
| Supply Range | VBUS & VBUS2: 4.4 V to 36 V - supports wide-input USB bus power and external isolated DC sources without level-shifting. |
| Package | 24-lead BGA, 22 mm × 6.25 mm × 2.06 mm - surface-mount footprint with 17.4 mm creepage optimized for high-voltage PCB layout. |
Pinout & Package
24-lead BGA package (22 mm × 6.25 mm × 2.06 mm) with 0.6 mm ball pitch, SAC305 RoHS-compliant finish, MSL Level 3 moisture sensitivity, and thermal resistance θJA = 49.6 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D1+, D1– | Upstream USB differential data pair | Connect directly to host/hub USB port; internal 1.5 kΩ pull-up resistors auto-configured for speed detection. |
| D2+, D2– | Downstream USB differential data pair | Connect to isolated peripheral; built-in 15 kΩ pull-down resistors to GND2 satisfy USB bus termination requirements. |
| ON / ON2 | Enable control inputs | Active-high logic enables data flow across isolation barrier; referenced to VLO (ON) and VLO2 (ON2) for level-shifted control. |
| VLO / VLO2 | 3.3 V LDO output supplies | Provide regulated 3.3 V references for local circuitry and USB transceiver bias; each supports up to 10 mA load. |
| VBUS / VBUS2 | Input power supplies | Accept 4.4–36 V USB bus or external power; internal 0.3 µF bypass capacitance reduces external component count. |
| GND / GND2 | Separate ground references | Galvanically isolated grounds define primary and secondary domains; no shared return path across isolation barrier. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-speed configuration | Detects downstream idle state to set upstream pull-up resistor value-enables seamless full/low-speed enumeration without host reconfiguration. |
| Integrated USB termination | On-chip 1.5 kΩ pull-up (upstream) and 15 kΩ pull-down (downstream) eliminate discrete resistors and reduce BOM count by ≥4 components. |
| Reinforced insulation certification | CSA/UL/IEC 62368-1 and IEC 60601-1 certified for 2 MOPP-qualified for patient-connected medical equipment and industrial safety-critical systems. |
| Low-power suspend mode | Reduces VBUS supply current to ≤2 mA during USB idle >3 ms-meets USB specification while minimizing system standby power. |
| EMI-optimized µModule design | Passes EN 55024 radiated emissions (CISPR 22 Class B) and EN 61000-4-x immunity tests without external filtering-reduces layout complexity and validation effort. |
Applications
| Industrial Data Acquisition | Medical Patient Monitoring |
|---|---|
Use Scenario: Isolating USB-connected sensors in high-noise factory-floor PLCs where ground potentials differ by >1 kV between control cabinet and field devices. IC Role / Device Role / Timing Role: Galvanic USB transceiver bridging upstream host PC and downstream isolated ADC modules, maintaining full-speed 12 Mbps throughput with <115 ns propagation delay. Use Value: Eliminates ground loops and prevents measurement corruption from common-mode transients exceeding 50 kV/µs-ensuring accurate analog readings under EMI stress. | Use Scenario: Connecting bedside vital-sign monitors to central nursing stations via USB while meeting IEC 60601-1 2 MOPP patient isolation requirements. IC Role / Device Role / Timing Role: Reinforced-insulation USB isolator enabling safe data transfer between patient-connected peripherals and non-isolated hospital IT infrastructure. Use Value: Certified 2 MOPP isolation (287.5 VRMS) and 1414 VPEAK working voltage ensure compliance with medical safety standards without additional isolation barriers. |
| USB Host Isolation in Test Equipment | Isolated USB Hub for Industrial Control |
Use Scenario: Protecting automated test equipment (ATE) hosts from voltage surges induced by malfunctioning DUTs connected via USB cables. IC Role / Device Role / Timing Role: Upstream-facing USB isolator placed between host controller and cable connector-handling hot-plug events and ±20 kV ESD strikes without latch-up. Use Value: ±20 kV HBM ESD protection on D1+/D1– pins and 7500 VRMS isolation prevent field failures caused by cable discharge events in production test environments. | Use Scenario: Building a ruggedized USB hub for connecting multiple isolated motor drives, encoders, and IO modules in CNC machinery. IC Role / Device Role / Timing Role: Downstream-facing USB isolator acting as hub port interface-supporting auto-speed negotiation and bus state mirroring for plug-and-play peripheral attachment. Use Value: Integrated 15 kΩ pull-down resistors and automatic upstream pull-up switching enable compliant USB enumeration of all downstream devices without firmware modification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated USB transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4160BRWZ | Single-channel 2.5 kVRMS isolation, no integrated LDOs, requires external 3.3 V supplies on both sides. | Limited to lower-voltage industrial use; not certified for medical 2 MOPP or CSA reinforced insulation. | Select when cost sensitivity outweighs safety certification needs and external regulators are already present. |
| ISOUSB211DWR | 3.75 kVRMS isolation, 12 Mbps only, no low-speed support, no auto-speed detection. | Suitable for fixed full-speed host-peripheral links but incompatible with legacy low-speed HID devices. | Choose for simple full-speed-only isolation where USB speed flexibility is unnecessary. |
Compared with ADUM4160BRWZ and ISOUSB211DWR, the LTM2894CY#PBF delivers higher isolation (7500 VRMS), integrated dual 3.3 V LDOs, auto-speed detection, and medical-grade 2 MOPP certification-making it the only option qualified for safety-critical, mixed-speed, and wide-input-voltage USB isolation.
Availability
LTM2894CY#PBF is available at Aetrix Electronics and suitable for industrial data acquisition, medical patient monitoring, automated test equipment, and isolated USB hub applications requiring stable component supply, long-term lifecycle support, and certified safety compliance.
Supply support for LTM2894CY#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 with precision, reliability, and safety-certified solutions.
The LTM2894CY#PBF belongs to Analog Devices' µModule isolated interface product line, designed specifically for robust, drop-in USB isolation in safety-critical systems where ground separation, ESD resilience, and regulatory compliance are mandatory.
FAQ
What is the operating temperature range for the LTM2894CY#PBF?
The LTM2894CY#PBF is rated for 0°C to 70°C ambient operation (Commercial grade). This range is defined by the 'C' suffix in the part number and confirmed in the Absolute Maximum Ratings table. The device includes overtemperature protection that activates above 125°C junction temperature, but continuous operation must remain within the specified ambient range to ensure reliability and compliance with safety certifications.
Does the LTM2894CY#PBF require external pull-up or pull-down resistors for USB compliance?
No, the LTM2894CY#PBF does not require external pull-up or pull-down resistors. It integrates a 1.5 kΩ pull-up resistor on the upstream D1+/D1– lines and 15 kΩ pull-down resistors on the downstream D2+/D2– lines to GND2. These are factory-trimmed and automatically configured based on detected downstream device speed-fully satisfying USB 2.0 termination requirements without additional components.
How does the LTM2894CY#PBF handle USB suspend mode and wake-up?
The LTM2894CY#PBF enters suspend mode after >3 ms of upstream bus idle time, reducing VBUS supply current to ≤2 mA. It wakes up on disconnect/reconnect events or downstream-initiated resume signaling, with recovery latency ≤10 µs. During suspend, VBUS2 current remains active to maintain downstream power, and VLO/VLO2 supplies continue delivering up to 10 mA for local circuitry.
What safety certifications apply to the LTM2894CY#PBF?
The LTM2894CY#PBF holds CSA (IEC/UL 62368-1, 60950-1, 60601-1), UL 1577, and IEC 60601-1 certifications. It is rated for reinforced insulation at 455 VRMS, basic insulation at 600–910 VRMS, and two means of patient protection (2 MOPP) at 287.5 VRMS-making it suitable for Class I and Class II medical equipment per IEC 60601-1.
Can the LTM2894CY#PBF support both full-speed and low-speed USB devices simultaneously?
Yes, the LTM2894CY#PBF automatically detects and configures for either full-speed (12 Mbps) or low-speed (1.5 Mbps) operation based on the downstream device's idle-state pull-up configuration. It does not support simultaneous dual-speed operation on the same port, but dynamically adapts per connection event-ensuring compatibility with keyboards, mice, and other legacy low-speed HID devices alongside modern full-speed peripherals.
LTM2894CY#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-BGA
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- USB
- Isolated Power:
- No
- Number of Channels:
- 1
- Inputs - Side 1/Side 2:
- 1/1
- Channel Type:
- Bidirectional
- Voltage - Isolation:
- 7500Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 12Mbps
- Propagation Delay tpLH / tpHL (Max):
- 115ns, 115ns
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 20ns, 20ns (Max)
- Voltage - Supply:
- 4.4V ~ 36V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-BGA (22x6.25)
LTM2894CY#PBF FAQ
1.How can I place an order for LTM2894CY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM2894CY#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 LTM2894CY#PBF reliable?
The price and inventory of LTM2894CY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM2894CY#PBF is usually 5 days.
3.What payment methods are accepted for LTM2894CY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM2894CY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM2894CY#PBF?
LTM2894CY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM2894CY#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 LTM2894CY#PBF?
For technical support, including LTM2894CY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM2894CY#PBF requirements.
6.How does Aetrix verify that LTM2894CY#PBF is sourced from the original manufacturer or authorized distributors?
All LTM2894CY#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 LTM2894CY#PBF meets industry standards.
7.What is the process for return or replacement of LTM2894CY#PBF?
All LTM2894CY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM2894CY#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 LTM2894CY#PBF part is unused and in its original packaging.
Return procedure for LTM2894CY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTM2894CY#PBF Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
