1

dc1748af

DEMO MANUAL DC1748A

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC

Input Supply Range

LTM2883-5

4.5

5

5.5

V

LTM2883-3

3.0

3

3.6

V

VCC2

Regulated Output Voltage

4.75

5

5.25

V

Adjustable Output Voltage Range

3.0

5.5

V

Maximum Load Current

20

mA

V+

Regulated Output Voltage

12

12.5

13

V

Adjustable Output Voltage Range

1.22

14

V

Maximum Load Current

20

mA

V–

Regulated Output Voltage

–12

–12.5

–13

V

Adjustable Output Voltage Range

–1.22

14

V

Maximum Load Current

15

mA

fMAX

Maximum Data Rate

DI1

→ O1, Ix → DOx, CL = 10pF

10

MHz

LTM2883-S, Bidirectional Communication

LTM2883-S, Unidirectional Communication

4

8

MHz

MHz

LTM2883-I

400

kHz

VIORM

Maximum Working Insulation Voltage

GND to GND2

560

400

VDC

VRMS

Common Mode Transient Immunity

30

kV/μs

DESCRIPTION

LTM2883 SPI/Digital or

I2C µModule Isolator with Adjustable ±12.5V

and 5V Regulated Power

Demonstration circuit 1748A is a serial peripheral interface

bus (SPI) or inter-IC bus (I2C) SPI/digital or I2C μModule

isolator with adjustable ±12.5V and 5V regulated power

featuring the LTM2883. The demo circuit features an EMI

optimized circuit configuration and printed circuit board

layout. All components are integrated into the μModule

isolator. The demo circuit operates from a single external

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

PERFORMANCE SUMMARY (TA = 25°C)

supply on VCC. The part generates output voltages on VCC2,

V+, and V–, which may be adjusted by external program-

ming resistors. It communicates all necessary signaling

across the isolation barrier through LTC’s isolator μModule

technology.

Design files for this circuit board are available at

http://www.linear.com/demo