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Analog Devices Inc. LTM2882CY-5#PBF
- Part No.:
- LTM2882CY-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 32-BBGA Module
- Datasheet:
-
LTM2882CY-5#PBF.pdf
- Description:
- DGT ISO 2500VRMS 4CH RS232 32BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,264
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Product details
Overview
LTM2882CY-5#PBF from Analog Devices is a galvanically isolated dual RS232 µModule transceiver with integrated 5V isolated DC/DC converter delivering up to 150mA, 2500VRMS isolation, ±10kV HBM ESD protection, and 100kbps–1Mbps data rates across TIA/EIA-232-F loads. It enables robust ground-loop-free serial communication in industrial test equipment and measurement systems.
For engineers reviewing the LTM2882CY-5#PBF datasheet, LTM2882CY-5#PBF pinout, LTM2882CY-5#PBF application, or LTM2882CY-5#PBF equivalent, key selection considerations include its 4.5V–5.5V input supply range, 1.62V–5.5V logic-level flexible VL interface, 30kV/μs common-mode transient immunity, and dual-channel half-duplex support via DE control.
Technical Context
The LTM2882CY-5#PBF implements coreless transformer-based µModule isolation for bidirectional signal and power transfer across a reinforced barrier. Its integrated full-bridge DC/DC converter operates at ~2MHz, feeding a voltage-doubler rectifier and low-noise LDO to deliver regulated 5V (VCC2) on the isolated side.
Signal encoding uses priority-based pulse modulation: T1IN/R1IN has deterministic latency, while T2IN/R2IN and DIN/DOUT exhibit ±6ns typical pulse-width uncertainty. The DE pin provides sub-2µs driver enable/disable for half-duplex RS232 operation without receiver interruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Input Range | 4.5V to 5.5V - powers both logic and isolated sides; matches standard 5V system rails. |
| VCC2 Output | 5.0V ±0.3V at 150mA - supplies RS232 drivers, receivers, and external circuitry on isolated side. |
| Isolation Rating | 2500VRMS for 1 minute - meets UL-CSA recognition (File #E151738) and supports 560VPEAK working voltage. |
| Data Rate | 100kbps (2.5nF load), 250kbps (1nF load), 1Mbps (250pF load) - compliant with TIA/EIA-232-F timing under real-world capacitive loading. |
| ESD Protection | ±10kV HBM on RS232 pins and across isolation barrier - prevents latchup or damage during handling or field operation. |
| Common-Mode Immunity | 30kV/μs - guarantees uninterrupted communication during fast ground-potential transients in noisy industrial environments. |
| Logic Supply (VL) | 1.62V to 5.5V - enables direct interfacing with 1.8V, 2.5V, 3.3V, or 5V microcontrollers without level shifters. |
Pinout & Package
32-pin BGA package (15mm × 11.25mm × 3.42mm), RoHS-compliant SAC305 solder finish, MSL Level 3. Thermal resistance θJA = 30°C/W; weight = 1.1g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (A8, B7–B8) | Main input supply | 4.5V–5.5V source powering internal DC/DC converter and logic-side circuitry. |
| VL (A7) | Logic interface supply | Independent 1.62V–5.5V rail for T1IN, T2IN, DIN, ON, R1OUT, R2OUT - decoupled internally with 2.2µF. |
| ON (A6) | Enable control | High = active operation; low = logic-side reset and isolated-side power-down - no floating allowed. |
| T1IN (A4), T2IN (A2) | RS232 driver inputs | Inverting logic inputs controlling T1OUT/T2OUT; require defined logic levels (no floating). |
| R1OUT (A3), R2OUT (A1) | RS232 receiver outputs | Inverting logic outputs reflecting R1IN/R2IN states; high-impedance during isolation failure. |
| DIN (A5), DOUT (L5) | Auxiliary digital channel | Non-inverting isolated path used for DE control in half-duplex configurations. |
| DE (L6) | Driver enable | Active-high control forcing T1OUT/T2OUT into high-impedance - enables true half-duplex RS232. |
| T1OUT (L4), T2OUT (L2) | RS232 driver outputs | Inverting outputs compliant with ±5V min swing; short-circuit protected to ±15V on GND2. |
| R1IN (L3), R2IN (L1) | RS232 receiver inputs | Inverting inputs with 5kΩ impedance; tolerate ±25V common-mode voltage relative to GND2. |
| VCC2 (K8, L7–L8) | Isolated 5V output | Regulated 5V supply for R1IN, R2IN, DE, DOUT - bypassed internally with 2.2µF to GND2. |
| GND (B1–B6) | Logic-side ground | Reference for VCC, VL, and logic signals - must be separated from GND2 by ≥9.48mm creepage. |
| GND2 (K1–K7) | Isolated-side ground | Reference for VCC2, RS232 I/O, and cable shield - forms isolation barrier with GND. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated 2.2µF decoupling caps, DC/DC transformer, LDO, and charge pumps eliminate all external passives for full RS232 isolation. |
| Flexible logic interfacing | VL pin accepts 1.62V–5.5V, enabling direct connection to diverse MCU I/O without level-shifting circuitry or timing penalties. |
| Robust fault tolerance | Driver outputs survive continuous short-circuit to ±15V; receivers withstand ±25V input; isolation barrier sustains 30kV/μs transients. |
| Dual-channel half-duplex support | DE pin + auxiliary DIN/DOUT channel allows sub-2µs driver enable/disable - eliminates need for external direction-control logic. |
| EMI-optimized layout | Embedded PCB bridge capacitance and discrete Y2 caps (e.g., Murata GA342QR7GF471KW01L) suppress emissions above/below 400MHz. |
Applications
| Industrial Serial Gateways | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Connecting PLCs and HMIs across electrically noisy factory floors with varying ground potentials. IC Role / Device Role / Timing Role: Galvanic isolator breaking ground loops while maintaining full-duplex RS232 timing integrity at 100kbps over 2.5nF cable loads. Use Value: Eliminates data corruption from 30kV/μs transients and enables reliable long-term operation without isolation transformers or optocouplers. |
Use Scenario: Interfacing benchtop instruments (oscilloscopes, DMMs) to host controllers in calibration labs. IC Role / Device Role / Timing Role: Dual isolated RS232 channel providing independent control and status reporting paths with deterministic T1IN→T1OUT latency. Use Value: Reduces board space vs. two discrete isolators; 150mA VCC2 supports powering auxiliary isolated sensors or level translators. |
| Medical Diagnostic Interfaces | Energy Metering Communication |
Use Scenario: Isolating RS232 ports on ultrasound or MRI subsystems to meet IEC 60601-1 patient leakage current limits. IC Role / Device Role / Timing Role: Reinforced 2500VRMS isolation barrier certified to UL-CSA standards, supporting 560VPEAK working voltage. Use Value: Achieves safety certification without external isolation components; ±10kV HBM protects against ESD events during clinical handling. |
Use Scenario: Secure RS232 telemetry link between smart meters and concentrators in outdoor substations subject to lightning-induced surges. IC Role / Device Role / Timing Role: High common-mode transient immunity (30kV/μs) maintains UART frame integrity during nearby surge events. Use Value: Prevents communication blackouts during grid disturbances; integrated DC/DC eliminates need for separate isolated power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated RS232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM2483BRWZ | Single-channel, 2.5kVRMS isolation, 16-pin SOIC, requires external isolated power supply. | Lacks integrated DC/DC; suitable only where isolated 5V already exists; lower integration increases BOM count. | Select when board space permits discrete power design and single-channel isolation suffices. |
| ISO1540DR | I²C isolator (not RS232), 2.5kVRMS, 8-pin SOIC, no integrated power, 1Mbps max data rate. | Protocol-incompatible; requires external RS232 transceivers and isolated power - three-chip solution vs. single µModule. | Not a functional alternative; only relevant if migrating from RS232 to I²C-based isolation architecture. |
Compared with ADM2483BRWZ and ISO1540DR, the LTM2882CY-5#PBF uniquely integrates dual RS232 transceivers, 2500VRMS isolation, and a 150mA 5V isolated DC/DC converter in one BGA package - reducing component count, layout complexity, and qualification effort for new industrial designs.
Availability
LTM2882CY-5#PBF is available at Aetrix Electronics and suitable for industrial communication, test and measurement equipment, and RS232 ground-loop elimination requiring stable component supply, long-lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for LTM2882CY-5#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 (now part of Analog Devices, Inc., a wholly owned subsidiary of Analog Devices, Inc.) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTM2882CY-5#PBF belongs to the µModule isolated transceiver product line, engineered to simplify robust serial interface design in electrically harsh environments where ground potential differences, ESD, and EMI threaten data integrity.
FAQ
What is the maximum continuous load current supported by the LTM2882CY-5#PBF's isolated VCC2 supply?
The LTM2882CY-5#PBF delivers up to 150mA from its regulated VCC2 output while maintaining 5.0V ±0.3V under load. This is specified for the -5 variant (4.5V–5.5V input) and supports powering the internal RS232 interface plus modest external circuitry on the isolated side - verified per Electrical Characteristics table on page 3 of the datasheet.
Does the LTM2882CY-5#PBF require external decoupling capacitors?
No, the LTM2882CY-5#PBF integrates 2.2µF ceramic decoupling capacitors internally for both VCC/GND and VCC2/GND2. External bulk capacitance (6.8µF–22µF) is recommended for hot-plug transient suppression, but no discrete bypass caps are needed for basic operation - confirmed in Applications Information section on page 14.
How does the LTM2882CY-5#PBF achieve half-duplex RS232 operation?
The LTM2882CY-5#PBF uses its auxiliary isolated digital channel (DIN → DOUT) to drive the DE pin, enabling sub-2µs driver enable/disable. When DE is low, T1OUT and T2OUT enter high-impedance state while receivers remain active - allowing true half-duplex mode without external logic or timing delays.
What isolation certifications apply to the LTM2882CY-5#PBF?
The LTM2882CY-5#PBF is UL-CSA Recognized (File #E151738) and carries CSA Component Acceptance Notice 5A. It provides 2500VRMS dielectric strength for 1 minute and supports 560VPEAK maximum working voltage - validated per IEC 60747-5-2 and tested from GND to GND2 with all pins shorted per side.
Can the LTM2882CY-5#PBF interface directly with a 1.8V microcontroller?
Yes, the LTM2882CY-5#PBF's VL pin accepts 1.62V–5.5V logic supplies. When VL = 1.8V, its logic inputs (T1IN, T2IN, DIN, ON) recognize thresholds of 0.25×VL to 0.75×VL (0.45V–1.35V), and outputs (R1OUT, R2OUT) drive to VOL ≤ 0.4V and VOH ≥ VL – 0.4V (≥1.4V) - fully compatible with 1.8V CMOS I/O.
LTM2882CY-5#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:
- RS232
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 30kV/µs
- Data Rate:
- 10Mbps
- Propagation Delay tpLH / tpHL (Max):
- 100ns, 100ns
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 60ns, 60ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-BGA (15x11.25)
LTM2882CY-5#PBF FAQ
1.How can I place an order for LTM2882CY-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM2882CY-5#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 LTM2882CY-5#PBF reliable?
The price and inventory of LTM2882CY-5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM2882CY-5#PBF is usually 5 days.
3.What payment methods are accepted for LTM2882CY-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM2882CY-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM2882CY-5#PBF?
LTM2882CY-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM2882CY-5#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 LTM2882CY-5#PBF?
For technical support, including LTM2882CY-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM2882CY-5#PBF requirements.
6.How does Aetrix verify that LTM2882CY-5#PBF is sourced from the original manufacturer or authorized distributors?
All LTM2882CY-5#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 LTM2882CY-5#PBF meets industry standards.
7.What is the process for return or replacement of LTM2882CY-5#PBF?
All LTM2882CY-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM2882CY-5#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 LTM2882CY-5#PBF part is unused and in its original packaging.
Return procedure for LTM2882CY-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTM2882CY-5#PBF Tags
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