Date: 20/01/2010

Dual isolated RS232 uModule transceiver from Linear

Linear has introduced the LTM2882, a new 2-channel isolated RS232 uModule transceiver that guards against large ground-to-ground differentials and common mode transients. The LTM2882 is suitable for a wide range of RS232 applications such as industrial communications and test/measurement equipment.

The LTM2882 breaks ground loops by isolating the logic level interface and line transceiver using internal inductive signal isolation. This allows for a common mode voltage range plus high common mode rejection >30kV/us. A low EMI DC-DC converter generates the power supplies for driving RS232 levels and provides an additional isolated 5V supply output for powering any supporting external components.

The key features of the dual isolated RS232 uModule transceiver are,

1W, 65% of efficiency
1.62V to 5.5V logic supply for flexible digital interface
High speed operation
1Mbps for 250pF/3kOhm load
250kbps for 1nF/3kOhm load
100kbps for 2.5nF/3kOhm TIA/EIA-232-F Load
3.3V (LTM2882-3) or 5V (LTM2882-5) operation
No Damage or Latchup to ±10kV ESD HBM on Isolated RS232 Interface or Across Isolation Barrier
High Common Mode Transient Immunity: 30kV/µs
Common Mode Working Voltage: 560VPEAK
True RS232 Compliant Output Levels

With 2,500VRMS of galvanic isolation, onboard secondary power and two fully compliant RS232 transmitters and receivers, the LTM2882 requires no external components, providing a small uModule solution for isolated serial data communications.

Package: 11.25 x 15mm x 2.8mm surface mount LGA and BGA package
Price: Starts at each $8.45 for1k pieces
Availability: Now

For more details visit www.linear.com