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Analog Devices Inc. LTM2883CY-3S#PBF
- Part No.:
- LTM2883CY-3S#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 32-BBGA Module
- Datasheet:
-
LTM2883CY-3S#PBF.pdf
- Description:
- DGTL ISOL 2500VRMS 6CH SPI 32BGA
- Quantity:
- Payment:
- Shipping:
Inventory:113
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Product details
Overview
LTM2883CY-3S#PBF from Analog Devices (formerly Linear Technology) is a galvanically isolated 6-channel µModule digital isolator with integrated ±12.5V and 5V regulated isolated power supplies. It operates from a single 3.3V input, supports SPI interface up to 4MHz, delivers >20mA per isolated rail, and provides 2500VRMS isolation rated per UL1577 - ideal for industrial sensor interfaces requiring ground-loop break and high common-mode transient immunity.
For engineers reviewing the LTM2883CY-3S#PBF datasheet, LTM2883CY-3S#PBF pinout, LTM2883CY-3S#PBF application, or LTM2883CY-3S#PBF equivalent, key selection criteria include its 3.3V input compatibility, adjustable isolated supplies, BGA-32 package footprint, I²C/SPI mode selectability via part number suffix, and guaranteed 30kV/µs common-mode transient immunity in real-world noisy environments.
Technical Context
The LTM2883CY-3S#PBF implements transformer-based galvanic isolation using coupled inductors and an isolation power transformer, enabling simultaneous data and power transfer across the barrier. Its architecture integrates a 3.3V-input isolated DC/DC converter that generates three independent regulated outputs: VCC2 (5V), V+ (+12.5V), and V– (–12.5V), each with external resistor-adjustable setpoints via AVCC2, AV+, and AV– pins.
It supports SPI communication (bidirectional at 4MHz, unidirectional at 8MHz) with dedicated SDO/SDI/SCK/CS/SDOE signals on the logic side and corresponding SDO2/SDI2/SCK2/CS2 signals on the isolated side. The device includes fail-safe behavior: during isolation failure, outputs default to high-impedance (logic side) or defined states (isolated side), and ON pin enables/disables both power and data paths synchronously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2500VRMS for 1 minute per UL1577 - certifies safety compliance for reinforced insulation in industrial mains-connected systems. |
| Input Supply | 3.0V to 3.6V - matches standard 3.3V system rails without level-shifting; eliminates need for auxiliary bias supply. |
| Isolated Outputs | VCC2 = 5V/20mA, V+ = +12.5V/20mA, V– = –12.5V/15mA - powers isolated ADCs, op-amps, or gate drivers directly from one module. |
| SPI Data Rate | 4MHz bidirectional / 8MHz unidirectional - supports high-speed serial sensor or DAC interfaces without external timing constraints. |
| Common-Mode Immunity | 30kV/µs - maintains reliable operation during fast transients typical of motor drives, relay switching, and ESD events. |
| Logic Interface Range | VL = 1.62V to 5.5V - allows direct connection to 1.8V, 2.5V, 3.3V, or 5V microcontrollers without external level translators. |
| Operating Temp | 0°C to 70°C (Commercial grade) - validated for stable performance in non-extended-temperature industrial control panels. |
Pinout & Package
Package: 32-pin BGA (15mm × 11.25mm × 3.42mm, MSL Level 4). RoHS-compliant SAC305 solder finish. Requires controlled moisture handling per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VL (A8) | Logic-side interface supply | Accepts 1.62V–5.5V to power DO1/DO2/SDO/SCK/SDI/CS/SDOE; decoupled internally with 2.2µF. |
| VCC (B7–B8) | Main input supply | 3.0V–3.6V input powering isolated DC/DC converter; bypassed with 2.2µF. |
| ON (A7) | Global enable control | High = active (power + data enabled); low = logic reset + isolated side powered down; no floating allowed. |
| SDO (A1), SDI (A4), SCK (A3), CS (A5), SDOE (A6) | SPI logic-side interface | Full-duplex SPI master interface; SDOE controls tri-state of SDO; all referenced to VL/GND. |
| VCC2 (L6), V+ (L8), V– (L7) | Isolated regulated outputs | 5V/20mA, +12.5V/20mA, –12.5V/15mA - each adjustable via AVCC2/AV+/AV– pins (600mV/±1.22V reference). |
| SDO2 (L1), SDI2 (L4), SCK2 (L3), CS2 (L5) | SPI isolated-side interface | Corresponding SPI signals referenced to VCC2/GND2; SCK2/CS2 default low/high on fault; no external pull-ups required. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Complete isolation solution - integrated transformer, regulators, and logic interface eliminate discrete BOM items and layout complexity. |
| Adjustable isolated supplies | VCC2/V+/V– setpoints tuned via single external resistors on AVCC2/AV+/AV– pins - enables precise voltage matching for downstream analog circuitry. |
| Fail-safe isolation fault response | Logic-side outputs go high-impedance; isolated-side outputs default to known states (e.g., SCK2 low, CS2 high) - prevents undefined bus conditions during barrier failure. |
| Low shutdown current | <10µA quiescent current when ON = low - supports ultra-low-power wake-on-event architectures in battery-backed systems. |
| ESD robustness | ±10kV HBM across isolation barrier - protects against handling and system-level ESD without external TVS diodes. |
Applications
| Industrial Sensor Interface | Isolated Data Acquisition |
|---|---|
|
Use Scenario: Connecting 24-bit delta-sigma ADCs (e.g., ADS131M04) to PLC backplanes where field-side sensors operate at ±12V and share no ground with controller. IC Role / Device Role / Timing Role: Provides galvanic isolation for SPI clock/data lines while powering the ADC's analog section from V+ and V– rails. Use Value: Eliminates ground-loop noise and enables accurate sub-µV measurement by breaking common-mode paths and supplying clean, adjustable analog rails. |
Use Scenario: Isolating high-speed serial output of isolated thermocouple amplifiers (e.g., AD8495 + ADuM5401 replacement) in test equipment front-ends. IC Role / Device Role / Timing Role: Transfers digitized temperature data across isolation barrier at 4MHz SPI rate while powering amplifier stage from VCC2. Use Value: Reduces component count vs. discrete isolator + DC/DC combo; maintains timing integrity with <100ns propagation delay and <50ns pulse width uncertainty. |
| Motor Drive Feedback Interface | Programmable Logic Controller I/O Module |
|
Use Scenario: Isolating position encoder signals (e.g., AMT203-V, SSI protocol) in servo drives exposed to 1000V bus transients. IC Role / Device Role / Timing Role: Shields MCU SPI interface from high dv/dt noise while delivering regulated ±12.5V to encoder ASIC bias rails. Use Value: Withstands 30kV/µs transients without data corruption - ensures continuous position reporting during IGBT switching events. |
Use Scenario: Adding isolated digital input/output channels to modular PLC backplanes requiring 2500VRMS certification and 3.3V logic compatibility. IC Role / Device Role / Timing Role: Provides six independent isolation channels (four digital I/O + two SPI lines) in single BGA footprint. Use Value: Reduces board area vs. multiple SOIC isolators; simplifies thermal management with 30°C/W θJA and low-profile 3.42mm height. |
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 |
|---|---|---|---|
| ADUM6420A0BRIZ | 4-channel isolator + 5V isolated supply only (no ±12.5V); 5000VRMS rating; 3.3V/5V input selectable; SOIC-20 package. | Better suited for pure digital I/O isolation where dual-polarity analog rails are unnecessary. | Select when higher isolation voltage is mandatory and ±12.5V rails are not required - avoids over-spec'ing power capability. |
| ISO7841FDWWR | 4-channel digital isolator only (no integrated power); requires external isolated DC/DC; 5000VRMS; SOIC-16; 100Mbps data rate. | Used where system already includes isolated power or where highest speed (>10MHz) is critical. | Choose when board space allows separate DC/DC and isolator, and when >4MHz SPI bandwidth is needed - trades integration for speed. |
Compared with ADUM6420A0BRIZ and ISO7841FDWWR, the LTM2883CY-3S#PBF uniquely combines 6-channel isolation, ±12.5V/5V triple-output power, and 3.3V-only input in a single BGA - reducing bill-of-materials and PCB area where analog sensor conditioning coexists with digital control.
Availability
LTM2883CY-3S#PBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, isolated data acquisition systems, and programmable logic controller I/O modules requiring stable component supply, long-term lifecycle support, and UL-certified 2500VRMS isolation.
Supply support for LTM2883CY-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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTM2883CY-3S#PBF belongs to the µModule isolator product line - designed to simplify high-reliability isolation design by integrating signal isolation, isolated power generation, and robust EMC performance into single-component solutions for harsh industrial environments.
FAQ
What is the maximum load current supported by each isolated supply in the LTM2883CY-3S#PBF?
The LTM2883CY-3S#PBF delivers up to 20mA from its 5V VCC2 rail, 20mA from its +12.5V V+ rail, and 15mA from its –12.5V V– rail under full-load conditions at 25°C. These ratings are confirmed in the Electrical Characteristics table (Page 4) and validated across the 0°C to 70°C operating range. Derating applies above 70°C ambient per thermal resistance specs (θJA = 30°C/W).
Does the LTM2883CY-3S#PBF support I²C communication, or is it SPI-only?
The LTM2883CY-3S#PBF is configured for SPI operation only - indicated by the "S" suffix in its part number. The "I" suffix (e.g., LTM2883CY-3I#PBF) denotes I²C mode. Pin functions differ between variants: LTM2883CY-3S#PBF uses SDO/SDI/SCK/CS pins, while the I²C variant uses SDA/SCL. Mixing modes is not possible without hardware change.
How is the ±12.5V output voltage adjusted on the LTM2883CY-3S#PBF?
Voltage adjustment is achieved by connecting external resistors between AV+ (K8) and V+ (L8), or between AV– (K7) and V– (L7). The internal reference is 1.22V for AV+ and –1.22V for AV–, so V+ = 1.22V × (1 + R1/R2) and V– = –1.22V × (1 + R1/R2). Full equations and example resistor values are provided in the Applications Information section of the LTM2883 datasheet.
What is the meaning of the "Y" in the LTM2883CY-3S#PBF part number?
The "Y" denotes the commercial temperature grade (0°C to 70°C), distinguishing it from "I" (–40°C to 85°C) and "H" (–40°C to 105°C) variants. This grade is specified in the Order Information table (Page 3) and aligns with the LTM2883C operating temperature range. All electrical specs for LTM2883CY-3S#PBF are guaranteed across this 0°C–70°C range.
Can the LTM2883CY-3S#PBF be used with a 5V input supply?
No - the LTM2883CY-3S#PBF is rated for 3.0V to 3.6V input only, as confirmed by its "-3" prefix and the Absolute Maximum Ratings table (VCC to GND: –0.3V to 6V, but operational range strictly 3V–3.6V). For 5V input, use the LTM2883CY-5S#PBF variant, which has identical functionality but is optimized for 4.5V–5.5V operation.
LTM2883CY-3S#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:
- 3V ~ 3.6V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-BGA (15x11.25)
LTM2883CY-3S#PBF FAQ
1.How can I place an order for LTM2883CY-3S#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM2883CY-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 LTM2883CY-3S#PBF reliable?
The price and inventory of LTM2883CY-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 LTM2883CY-3S#PBF is usually 5 days.
3.What payment methods are accepted for LTM2883CY-3S#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM2883CY-3S#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM2883CY-3S#PBF?
LTM2883CY-3S#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM2883CY-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 LTM2883CY-3S#PBF?
For technical support, including LTM2883CY-3S#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM2883CY-3S#PBF requirements.
6.How does Aetrix verify that LTM2883CY-3S#PBF is sourced from the original manufacturer or authorized distributors?
All LTM2883CY-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 LTM2883CY-3S#PBF meets industry standards.
7.What is the process for return or replacement of LTM2883CY-3S#PBF?
All LTM2883CY-3S#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM2883CY-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 LTM2883CY-3S#PBF part is unused and in its original packaging.
Return procedure for LTM2883CY-3S#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTM2883CY-3S#PBF Tags
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