DC1079A-A datasheet, PDF - EEWORLD Datasheet

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DC1079A-A: Descriptioneval board for ltc4310-1; CategoryDevelopment board/suite/development tools; File Size634KB，10 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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eval board for ltc4310-1

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DEMO MANUAL

DC1079A-A/DC1079A-B

LTC4310-1/LTC4310-2

Hot Swappable I

C Isolators

DESCRIPTION

Demonstration circuit 1079A features the LTC4310 I

isolator. The LTC

4310 provides bidirectional I

C com-

munication between two I

C buses whose grounds are

isolated from one another. Each LTC4310 encodes I

bus logic states into signals that are transmitted across

an isolation barrier to another LTC4310. The receiving

LTC4310 decodes the transmission and drives its I

C bus

to the appropriate logic state. The isolation barrier can be

bridged by an inexpensive Ethernet (or other) transformer

to achieve communications across voltage differences

reaching thousands of volts, or it can be bridged by ca-

pacitors for lower voltage isolation. DC1079A shows both

transformer and capacitor techniques. Separate supplies

are connected on opposite sides of the isolation barrier.

Rise time accelerators provide strong pull-up currents on

SCL and SDA rising edges to meet rise time specifications

for heavily loaded systems. Data and clock Hot Swap™

circuitry prevent data corruption when a card is inserted

into or removed from a live bus. When a bus is stuck low

for 37ms, the LTC4310 turns off its pull-down devices

and generates up to sixteen clocks and a STOP bit in an

attempt to free the bus. Driving EN low sets the LTC4310

in a very low current shutdown mode to conserve power.

This is set with a jumper for each LTC4310 on the DC1079A.

The READY pin provides a digital output flag that pulls low

to indicate that the LTC4310 is driving its SDA and SCL

pins with the logic state information it is receiving on its

RXP and RXN pins from the other LTC4310. An LED at

each READY pin indicates that READY is low.

DC1079A-A is populated with the LTC4310-1 and is in-

tended for use in I

C systems up to 100kHz. DC1079A-B

is populated with the LTC4310-2 which is intended for I

bus speeds from 100kHz to 400kHz.

Design files for this circuit board are available at

http://www.linear.com/demo

LT, LTC, LTM, Hot Swap, Linear Technology and the Linear logo are registered trademarks

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

owners.

BOARD PHOTO

Figure 1. DC1079A

dc1079af

DC1079A-A Related Products

	DC1079A-A	DC1079A-B
Description	eval board for ltc4310-1	eval board for ltc4310-2

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