Dual-Channel Digital Isolator

ADuM1210

Rev. C

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FEATURES

Narrow body, RoHS-compliant, 8-lead SOIC

Low power operation

5 V operation

1.1 mA per channel maximum @ 0 Mbps to 2 Mbps

3.7 mA per channel maximum @ 10 Mbps

3 V operation

0.8 mA per channel maximum @ 0 Mbps to 2 Mbps

2.2 mA per channel maximum @ 10 Mbps

3 V/5 V level translation

High temperature operation: 105°C

High data rate: dc to 10 Mbps (NRZ)

Precise timing characteristics

3 ns maximum pulse width distortion

3 ns maximum channel-to-channel matching

High common-mode transient immunity: >25 kV/μs

Safety and regulatory approvals

UL recognition

2500 V rms for 1 minute per UL 1577

CSA Component Acceptance Notice #5A

VDE certificate of conformity

DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12

APPLICATIONS

Size-critical multichannel isolation

SPI interface/data converter isolation

RS-232/RS-422/RS-485 transceiver isolation

Digital field bus isolation

Gate drive interface

GENERAL DESCRIPTION

The ADuM12101 is a dual-channel, digital isolator based on

Analog Devices, Inc. iCoupler® technology. Combining high

speed CMOS and monolithic transformer technology, this

isolation component provides outstanding performance

characteristics superior to alternatives such as optocoupler

devices.

By avoiding the use of LEDs and photodiodes, iCoupler devices

remove the design difficulties commonly associated with opto-

couplers. The concerns of the typical optocoupler regarding

uncertain current transfer ratios, nonlinear transfer functions,

and temperature and lifetime effects are eliminated with the

simple iCoupler digital interfaces and stable performance

characteristics. The need for external drivers and other discrete

components is eliminated with iCoupler products. Furthermore,

iCoupler devices consume one-tenth to one-sixth the power of

optocouplers at comparable signal data rates.

The ADuM1210 isolator provides two independent isolation

channels operable with the supply voltage on either side,

ranging from 2.7 V to 5.5 V. This provides compatibility with

lower voltage systems and enables voltage translation

functionality across the isolation barrier. In addition, the

ADuM1210 provides low pulse width distortion (<3 ns) and

tight channel-to-channel matching (<3 ns). Unlike other opto-

coupler alternatives, the ADuM1210 isolator has a patented

refresh feature that ensures dc correctness in the absence of

input logic transitions and during power-up/power-down

conditions. Furthermore, as an alternative to the ADuM1200

dual-channel digital isolator that defaults to an output high

condition, the ADuM1210 outputs default to a logic low state

when input power is off.

pending.

FUNCTIONAL BLOCK DIAGRAM

ENCODE

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Figure 1.