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Analog Devices Inc. LTM2882CV-5#PBF
- Part No.:
- LTM2882CV-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 32-BLGA
- Datasheet:
-
LTM2882CV-5#PBF.pdf
- Description:
- DGT ISO 2500VRMS 4CH RS232 32LGA
- Quantity:
- Payment:
- Shipping:
Inventory:347
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Product details
Overview
LTM2882CV-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 rating, ±10kV HBM ESD protection on RS232 and isolation barrier pins, and 100kbps–1Mbps data rate support across TIA/EIA-232-F loads. It enables robust ground-loop-free communication in industrial serial interfaces.
For engineers reviewing the LTM2882CV-5#PBF datasheet, LTM2882CV-5#PBF pinout, LTM2882CV-5#PBF application, or LTM2882CV-5#PBF equivalent, key selection considerations include its 5V input operation (4.5–5.5V), 1.62–5.5V logic supply flexibility, 30kV/μs common-mode transient immunity, and auxiliary isolated digital channel for half-duplex DE control.
Technical Context
The LTM2882CV-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-dropout regulator to deliver stable 5V@150mA on VCC2.
Signal integrity is maintained via priority-encoded timing: T1IN/R1IN channels have deterministic delay only (no jitter), while T2IN/R2IN and DIN/DOUT exhibit ±6ns typical pulse-width uncertainty. The DE pin enables sub-2µs driver enable/disable for half-duplex RS232 operation without receiver interruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Supply | 4.5V to 5.5V - powers both logic and isolated sides; supports standard 5V system rails. |
| Isolation Rating | 2500VRMS for 1 minute - meets UL-CSA recognition (File #E151738) and enables safe operation in high-noise industrial environments. |
| Data Rate | 100kbps (2.5nF load), 250kbps (1nF), 1Mbps (250pF) - compliant with TIA/EIA-232-F timing under defined capacitive loading. |
| VCC2 Output | 5.0V ±0.3V @ 150mA - powers external isolated circuitry (e.g., level shifters, sensors) without additional regulators. |
| Logic Supply Range | 1.62V to 5.5V on VL - allows direct interfacing with 1.8V, 2.5V, 3.3V, or 5V microcontrollers without level translation. |
| ESD Protection | ±10kV HBM on RS232 I/O and across isolation barrier - eliminates need for external TVS diodes in most industrial deployments. |
| Common-Mode Immunity | 30kV/μs - ensures uninterrupted communication during fast transients (e.g., relay switching, motor commutation). |
Pinout & Package
Package: 32-pin LGA (15mm × 11.25mm × 2.8mm), RoHS-compliant Au finish, MSL Level 3, operating temperature range 0°C to 70°C (C-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (A8, B7–B8) | Main supply input | Accepts 4.5–5.5V; powers internal DC/DC converter and logic side; internally bypassed with 2.2µF. |
| VL (A7) | Logic interface supply | Independent 1.62–5.5V rail for DIN, T1IN, T2IN, R1OUT, R2OUT, ON; enables mixed-voltage system integration. |
| ON (A6) | Enable control | High = active operation; low = logic-side reset + isolated-side power-off; prevents floating via pull-up/pull-down. |
| DIN (A5) | Auxiliary isolated input | Non-inverting logic input mirrored to DOUT; used for DE control in half-duplex configurations. |
| T1IN/T2IN (A4/A2) | RS232 driver inputs | Inverting logic inputs controlling T1OUT/T2OUT; require defined logic levels (no floating). |
| R1OUT/R2OUT (A3/A1) | RS232 receiver outputs | Inverting logic outputs driven by R1IN/R2IN; high-impedance on isolation failure. |
| GND (B1–B6) | Logic-side ground | Reference for VCC, VL, and logic signals; must be separated from GND2 by ≥9.48mm creepage. |
| VCC2 (K8, L7–L8) | Isolated 5V output | Regulated 5V supply for R1IN, R2IN, DE, DOUT; capable of 150mA continuous load. |
| GND2 (K1–K7) | Isolated-side ground | Reference for RS232 transceiver and VCC2; connects to cable shield or remote ground to break loops. |
| R1IN/R2IN (L3/L1) | RS232 receiver inputs | Inverting inputs accepting ±25V common-mode range; 5kΩ nominal impedance; tolerate open-circuit. |
| T1OUT/T2OUT (L4/L2) | RS232 driver outputs | Inverting outputs delivering ±5.7V swing into 3kΩ; short-circuit protected to ±15V; high-Z when DE = low. |
| DOUT (L5) | Auxiliary isolated output | Non-inverting mirror of DIN; drives DE pin directly for hardware-controlled half-duplex mode. |
| DE (L6) | Driver enable | Active-high control for T1OUT/T2OUT; enables <2µs transition between tri-state and active drive. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated 2.2µF decoupling caps, coreless transformers, DC/DC converter, and RS232 transceivers eliminate BOM count and layout complexity. |
| Galvanic isolation with power transfer | 2500VRMS dielectric strength + 560VPEAK working voltage enables safety-certified designs without discrete isolators or isolated supplies. |
| Flexible logic-level interfacing | VL pin supports 1.62–5.5V logic, allowing direct connection to ultra-low-voltage MCUs (1.8V) or legacy 5V controllers without level shifters. |
| Robust transient immunity | 30kV/μs common-mode rejection and ±25V receiver input tolerance prevent communication loss in electrically noisy factory floors or test benches. |
| Half-duplex hardware control | DIN→DOUT auxiliary channel provides isolated, low-latency (<2µs) DE assertion for RS232 bus arbitration without software overhead. |
Applications
| Industrial Serial Gateways | Test & Measurement Interfaces |
|---|---|
Use Scenario: Connecting PLCs, HMIs, and CNC machines over long RS232 cables in factories with multiple ground potentials. IC Role / Device Role / Timing Role: Dual-channel isolated transceiver breaking ground loops while maintaining full-duplex communication between disparate equipment grounds. Use Value: Eliminates ground-loop-induced noise and data corruption; sustains error-free operation during 30kV/μs transients from nearby motor drives. | Use Scenario: Isolating PC-hosted serial commands from sensitive analog measurement front-ends in benchtop instruments. IC Role / Device Role / Timing Role: Provides galvanic separation between host USB-to-RS232 adapters and isolated DUT interfaces, preventing measurement contamination. Use Value: Enables 100kbps+ reliable command/response exchange while blocking 50/60Hz ground noise and RF pickup from shared lab grounds. |
| Medical Device Data Ports | Energy Meter Communication Modules |
Use Scenario: Secure RS232 port on patient-connected diagnostic equipment requiring reinforced insulation per IEC 60601-1. IC Role / Device Role / Timing Role: Dual isolated RS232 channel with 2500VRMS rating and certified UL-CSA recognition for patient-isolation boundary compliance. Use Value: Meets creepage (9.48mm) and partial discharge (<5pC) requirements out-of-the-box; avoids costly custom isolation design and certification. | Use Scenario: Smart meter firmware updates and diagnostics via isolated RS232 link to utility handheld readers in high-EMI substations. IC Role / Device Role / Timing Role: Robust isolated transceiver with ±10kV HBM ESD protection and EN 55024 RF/magnetic immunity for outdoor deployment. Use Value: Survives repeated hot-plug events and 30kV/μs transients from switching surges; maintains 1Mbps throughput for rapid firmware uploads. |
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, no integrated DC/DC; requires external isolated 5V supply. | Suitable for space-constrained single-port designs where external isolated power is already available. | Select when board area is critical and isolated 5V rail exists; avoid if needing dual-channel or self-powered isolation. |
| ISO1540DR | I²C isolator (not RS232), 2.5kVRMS, 1Mbps, no transceiver or DC/DC; requires external level-shifting and drivers. | Applicable only to I²C-based systems; cannot replace RS232 physical layer functionality. | Not a functional alternative for RS232; consider only if migrating entire interface to I²C with external RS232-to-I²C bridge. |
Compared with ADM2483BRWZ and ISO1540DR, the LTM2882CV-5#PBF uniquely integrates dual RS232 transceivers, 2500VRMS isolation, and a 150mA 5V isolated DC/DC converter in one LGA package-eliminating external power components and enabling true drop-in isolation for legacy RS232 ports.
Availability
LTM2882CV-5#PBF is available at Aetrix Electronics and suitable for industrial serial gateways, test and measurement interfaces, medical device data ports, and energy meter communication modules requiring stable component supply and long-term manufacturability.
Supply support for LTM2882CV-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTM2882CV-5#PBF belongs to the µModule isolated interface product line, engineered to simplify system-level isolation by integrating signal transceivers, power conversion, and safety-rated insulation in compact, pre-validated packages for demanding industrial and medical applications.
FAQ
What is the maximum load current supported by the isolated 5V supply (VCC2) of the LTM2882CV-5#PBF?
The LTM2882CV-5#PBF delivers up to 150mA from its regulated VCC2 output under full-load conditions while maintaining 4.7V minimum output voltage. This is sufficient to power the internal RS232 transceiver and provide auxiliary 5V for external isolated circuitry such as level shifters or small sensors without requiring an additional regulator.
Does the LTM2882CV-5#PBF require external decoupling capacitors?
No, the LTM2882CV-5#PBF integrates 2.2µF ceramic decoupling capacitors for both VCC/GND and VCC2/GND2 internally. However, Analog Devices recommends adding an external 6.8–22µF bulk capacitor (with higher ESR) near the device to dampen hot-plug ringing, plus an optional 1–4.7µF low-ESL ceramic cap for EMI-sensitive applications.
Can the LTM2882CV-5#PBF operate with a 3.3V logic supply (VL) while using a 5V main supply (VCC)?
Yes, the LTM2882CV-5#PBF fully supports independent supply domains: VCC accepts 4.5–5.5V for the main input, while VL accepts 1.62–5.5V for logic interfacing. This allows direct connection to 3.3V microcontrollers (e.g., STM32, PIC32) without level shifters, even when powered from a 5V system rail.
How does the LTM2882CV-5#PBF achieve half-duplex RS232 operation?
The LTM2882CV-5#PBF uses its auxiliary isolated digital channel (DIN → DOUT) to drive the DE (driver enable) pin. When DIN is asserted, DOUT goes high, enabling both T1OUT and T2OUT within <2µs. This hardware-controlled method eliminates software polling delays and ensures precise bus arbitration in multi-drop RS232 networks.
What safety certifications apply to the LTM2882CV-5#PBF?
The LTM2882CV-5#PBF carries UL-CSA recognition (File #E151738) and CSA Component Acceptance Notice 5A. It achieves 2500VRMS isolation per 1-minute test, 560VPEAK maximum working voltage, and 9.48mm creepage distance - meeting reinforced insulation requirements for industrial and medical applications per IEC 60950-1 and IEC 60601-1.
LTM2882CV-5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 32-BLGA
- 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-LGA (15x11.25)
LTM2882CV-5#PBF FAQ
1.How can I place an order for LTM2882CV-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM2882CV-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 LTM2882CV-5#PBF reliable?
The price and inventory of LTM2882CV-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 LTM2882CV-5#PBF is usually 5 days.
3.What payment methods are accepted for LTM2882CV-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM2882CV-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM2882CV-5#PBF?
LTM2882CV-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM2882CV-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 LTM2882CV-5#PBF?
For technical support, including LTM2882CV-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM2882CV-5#PBF requirements.
6.How does Aetrix verify that LTM2882CV-5#PBF is sourced from the original manufacturer or authorized distributors?
All LTM2882CV-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 LTM2882CV-5#PBF meets industry standards.
7.What is the process for return or replacement of LTM2882CV-5#PBF?
All LTM2882CV-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM2882CV-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 LTM2882CV-5#PBF part is unused and in its original packaging.
Return procedure for LTM2882CV-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTM2882CV-5#PBF Tags
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