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- PCB Assembly/Reflow & Packaging
- Application Notes
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- Purchase Demo Board
LTM2887 - SPI/Digital or I2C μModule Isolator with Dual Adjustable 5V Regulators
Features
- 6-Channel Logic Isolator: 2500VRMS for 1 Minute
- UL-CSA Recognition Pending
- Isolated DC Power:
1.8V to 5V Logic Supply at Up to 100mA
0.6V to 5V Auxiliary Supply at Up to 100mA - No External Components Required
- SPI/Digital (LTM2887-S) or I2C (LTM2887-I) Options
- High Common Mode Transient Immunity: 30kV/μs
- High Speed Operation:
10MHz Digital Isolation
4MHz/8MHz SPI Isolation
400kHz I2C Isolation - 3.3V (LTM2887-3) or 5V (LTM2887-5) Operation
- 1.62V to 5.5V Logic Supply
- ±10kV ESD HBM Across the Isolation Barrier
- Maximum Continuous Working Voltage: 560VPEAK
- Low Current Shutdown Mode (<10μA)
- Low Profile 15mm × 11.25mm × 3.42mm BGA Package
Typical Application
Description
The LTM®2887 is a complete galvanic digital μModule® (micromodule) isolator. No external components are required. A single 3.3V or 5V supply powers both sides of the interface through an integrated, isolated DC/DC converter. A logic supply pin allows easy interfacing with different logic levels from 1.62V to 5.5V, independent of the main supply.
Available options are compliant with SPI and I2C (master mode only) specifications.
The isolated side includes two 5V nominal power supplies, including programmable current limit, each capable of providing more than 100mA of load current. The supplies may be adjusted from their nominal value using a single external resistor.
Coupled inductors and an isolation power transformer provide 2500VRMS of isolation between the input and output logic interface. This device is ideal for systems where the ground loop is broken, allowing for a large common mode voltage range. Communication is uninterrupted for common mode transients greater than 30kV/μs.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTM2887CY-3I#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | C | 05-08-1851 | Yes |
| LTM2887CY-3S#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | C | 05-08-1851 | Yes |
| LTM2887CY-5I#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | C | 05-08-1851 | Yes |
| LTM2887CY-5S#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | C | 05-08-1851 | Yes |
| LTM2887HY-3I#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | H | 05-08-1851 | Yes |
| LTM2887HY-3S#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | H | 05-08-1851 | Yes |
| LTM2887HY-5I#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | H | 05-08-1851 | Yes |
| LTM2887HY-5S#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | H | 05-08-1851 | Yes |
| LTM2887IY-3I#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | I | 05-08-1851 | Yes |
| LTM2887IY-3S#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | I | 05-08-1851 | Yes |
| LTM2887IY-5I#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | I | 05-08-1851 | Yes |
| LTM2887IY-5S#PBF | 15mm x 11.25mm x 3.42mm BGA | BGA | I | 05-08-1851 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTM2887CY-3I#PBF | 15mm x 11.25mm x 3.42mm BGA | C | $17.50 | $12.25 | Yes | |
| LTM2887CY-3S#PBF | 15mm x 11.25mm x 3.42mm BGA | C | $17.50 | $12.25 | Yes | |
| LTM2887CY-5I#PBF | 15mm x 11.25mm x 3.42mm BGA | C | $17.50 | $12.25 | Yes | |
| LTM2887CY-5S#PBF | 15mm x 11.25mm x 3.42mm BGA | C | $17.50 | $12.25 | Yes | |
| LTM2887HY-3I#PBF | 15mm x 11.25mm x 3.42mm BGA | H | $23.10 | $16.17 | Yes | |
| LTM2887HY-3S#PBF | 15mm x 11.25mm x 3.42mm BGA | H | $23.10 | $16.17 | Yes | |
| LTM2887HY-5I#PBF | 15mm x 11.25mm x 3.42mm BGA | H | $23.10 | $16.17 | Yes | |
| LTM2887HY-5S#PBF | 15mm x 11.25mm x 3.42mm BGA | H | $23.10 | $16.17 | Yes | |
| LTM2887IY-3I#PBF | 15mm x 11.25mm x 3.42mm BGA | I | $19.25 | $13.48 | Yes | |
| LTM2887IY-3S#PBF | 15mm x 11.25mm x 3.42mm BGA | I | $19.25 | $13.48 | Yes | |
| LTM2887IY-5I#PBF | 15mm x 11.25mm x 3.42mm BGA | I | $19.25 | $13.48 | Yes | |
| LTM2887IY-5S#PBF | 15mm x 11.25mm x 3.42mm BGA | I | $19.25 | $13.48 | Yes | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1791A-A | LTM2887-3S Demo Board | SPI uModule Isolator (3.3V Supply) | $50.00 | |
| DC1791A-B | LTM2887-5S Demo Board | SPI uModule Isolator (5.0V Supply) | $50.00 | |
| DC1791A-C | LTM2887-3I Demo Board | I2C uModule Isolator (3.3V Supply) | $50.00 | |
| DC1791A-D | LTM2887-5I Demo Board | I2C uModule Isolator (5.0V Supply) | $50.00 | |
| Buy Now | |||
Applications
- Isolated SPI or I2C Interfaces
- Industrial Systems
- Test and Measurement Equipment
- Breaking Ground Loops
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Design Tools
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- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.