DESCRIPTION:

The ADuM120x are dual channel digital isolators based on Analog Devices' iCoupler technology. Combining high speed CMOS and monolithic transformer technology, these isolation components provide 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 optocouplers. The typical optocoupler concerns 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 these iCoupler products. Furthermore, iCoupler devices consume one-tenth to one-sixth the power of optocouplers at comparable signal data rates.

The ADuM120x isolators provide two independent isolation channels in a variety of channel configurations and data rates (see the Ordering Guide). Both parts operate with the supply voltage on either side ranging from 2.7 V to 5.5 V, providing compatibility with lower voltage systems as well as enabling a voltage translation functionality across the isolation barrier. In addition, the ADuM120x provide low pulse-width distortion (< 3 ns for CR grade) and tight channel-to-channel matching (< 3 ns for CR grade). Unlike other optocoupler alternatives, the ADuM120x isolators have a patented refresh feature that ensures dc correctness in the absence of input logic transitions and during power-up/power-down conditions.

FEATURES:

1. Narrow body SOIC 8-lead package

2. Low power operation

--5V operation

----1.1 mA per channel maximum @ 0 Mbps to 2 Mbps

----3.7 mA per channel maximum @ 10 Mbps

----8.2 mA per channel maximum @ 25 Mbps

--3V operation 0.8 mA per channel maximum @ 0 Mbps to 2 Mbps

----2.2 mA per channel maximum @ 10 Mbps

----4.8 mA per channel maximum @ 25 Mbps

1. Bidirectional communication

2. 3V/5V level translation
   

3. High temperature operation: 105℃

4. High data rate: dc to 25 Mbps (NRZ)

5. Precise timing characteristics

----3 ns maximum pulse-width distortion

----3 ns maximum channel-to-channel matching

1. High common-mode transient immunity: > 25 kV/us

2. 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 EN 60747-5-2 (VDE 0884 Part 2): 2003-01

----DIN EN 60950 (VDE 0805): 2001-12; DIN EN 60950: 2000

----VIORM = 560 V peak

APPLICATIONS:

1. Size-critical multichannel isolation
2. SPI interface/data converter isolation
   
3. RS-232/RS-422/RS-485 transceiver isolation
4. Digital field bus isolation