Linear Technology: DC1747A Demo Board for LTM2882 RS232 μModule Transceiver + Power

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Kit Overview

Demonstration circuit DC1747ADC1747A is a dual isolated RS232 μModule transceiver with integrated power featuring the LTM2882LTM2882. The demo circuit provides a 2-channel, 2500VRMS, galvanically isolated RS232 transceiver interface. The demo circuit features an EMI optimized circuit confi guration and printed circuit board layout. All components are integrated into the μModule transceiver. The demo circuit operates from a single external supply on VCC. The part generates the output voltage VCC2 and communicates all necessary signaling across the isolation barrier using Linear Technology’s isolator μModule technology.

The LTM2882LTM2882 is a complete galvanically isolated dual RS232 μModule transceiver. 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.

Enhanced ESD protection allows this part to withstand up to ±10kV (human body model) on the transceiver interface pins to isolated supplies and across the isolation barrier to logic supplies without latchup or damage.

Ordering Information:

MPN	Description
DC1747A-ADC1747A-A	LTM2882-3LTM2882-3 low EMI test board (for EMI evaluation purposes only, no VL & no GPIO)
DC1747A-BDC1747A-B	LTM2882-5LTM2882-5 low EMI test board (for EMI evaluation purposes only, no VL & no GPIO)

Key Applications: Isolated RS232 Interface, Industrial Communication, Test and Measurement Equipment, Breaking RS232 Ground Loops

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Technical Documents

Learning Center

Type	Description
User Manual	LTC: Demo Manual for DC1747A for LTM2882 Dual Isolated RS232 μModule Transceiver + Power
User Guide	LTC: RS232 Quick Guide
Datasheet	LTC: Datasheet for LTM2882 - Dual Isolated RS232 μModule Transceiver + Power
Product Brief	LTC: Product Brief for Isolated RS232 + 1W Power
Product Brief	LTC: Product Brief for Dual Isolated RS232 uModule Transceiver Integrates Isolated Power
Product Brief	LTC: Product Brief for Isolated RS485 & RS232 μModule Transceivers Now Specified for -55°C to 105°C for Military & Automotive Applications
Whitepaper	LTC: White Paper for Isolated Data Transmission and Power Conversion Integrated Into a Surface Mount Package

Design Elements

Type	Description
Schematics	LTC: Schematic File for DC1747
Layout	LTC: Layout File for DC1747A
BOM	LTC: BOM File for DC1747A

Video

Kit Features

Features of LTM2882LTM2882 :

UL Rated Dual RS232 Transceiver: 2500V_RMSUL Recognized File #E15178
Isolated DC Power: 5V at Up to 200mA
No External Components Required
1.62V to 5.5V Logic Supply for Flexible Digital Interfacing
High Speed Operation
- 1Mbps for 250pF/3kΩ Load
- 250kbps for 1nF/3kΩ Load
- 100kbps for 2.5nF/3kΩ TIA/EIA-232-F Load
3.3V (LTM2882-3LTM2882-3) or 5V (LTM2882-5LTM2882-5) Operation
No Damage or Latchup to ±10kV HBM ESD on Isolated RS232 Interface or Across Isolation Barrier
High Common Mode Transient Immunity: 30kV/μs
Common Mode Working Voltage: 560V_PEAK
True RS232 Compliant Output Levels
Low Profile (15mm × 11.25mm) Surface Mount BGA and LGA Packages

Kit Contents

The Linear Technology's DC1747A-ADC1747A-A supplied with below contents:
- DC1747A-ADC1747A-A Demo Board

The Linear Technology's DC1747A-BDC1747A-B supplied with below contents:
- DC1747A-BDC1747A-B Demo Board