Features and Benefits
- Isolated PWM Controller
- Integrated transformer driver
- Regulated adjustable output: 3.3 V to 24 V
- 2 W output power
- 70% efficiency at guaranteed load of 400 mA at 5.0 V output
- Quad dc-to-25 Mbps (NRZ) signal isolation channels
- 20-lead SSOP package
- High temperature operation: 105°C
- High common-mode transient immunity: >25 kV/μs
- 200 kHz to 1 MHz adjustable oscillator frequency
- Soft start function at power-up
- Pulse-by-pulse overcurrent protection
- Thermal shutdown
- 2500 V rms isolation
- Evaluation Board available
- Automotive Qualified
The ADuM3470 / ADuM3471 / ADuM3472 / ADuM3473 / ADuM3474 devices are quad-channel, digital isolators with an integrated PWM controller and transformer driver for an isolated DC/DC converter. Based on the Analog Devices, Inc., iCoupler® technology, the DC/DC converter provides up to 2 W of regulated, isolated power at 3.3 V to 24 V from a 5.0 V input supply or from a 3.3 V supply. This eliminates the need for a separate, isolated DC/DC converter in 2 W isolated designs. The iCoupler chip-scale transformer technology is used to isolate the logic signals, and the integrated transformer driver with isolated secondary side control provides higher efficiency for the isolated DC/DC converter. The result is a small form factor, total isolation solution.
The ADuM347x isolators provide four independent isolation channels in a variety of channel configurations and data rates.
- RS-232/RS-422/RS-485 transceivers
- Industrial field bus isolation
- Power supply startup bias and gate drives
- Isolated sensor interfaces
- Process controls
Markets and Technologies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The EVAL-ADuM3471EBZ demonstrates two separate applications for the ADuM347x family of quad-channel digital isolators with integrated transformer drivers. It has two independent power supply circuits: a double supply and a single supply. The switching frequency can be set from 200 kHz to 1000 kHz. The board supports a variety of I/O configurations and multiple transformer options. It is equipped with two ADuM3471 isolators.
Features & Benefits
- 2 independent ADuM347x circuits including 2.5 kVrms isolated dc-to-dc converters
- Single supply 5 V in to 5 V out (regulated) Reconfigurable to 5 V in to 3.3 V out or 3.3 V in to 3.3 V out
- Double supply 5 V in to 15 V out (regulated) and 7.5 V out (unregulated) Reconfigurable to 5 V in to 12 V out (regulated) and 6 V out (unregulated)
- 4 isolated 25Mbps data channels per ADuM347x circuit
- Footprints for Coilcraft and Halo transformer options
- Multiple switching frequency options
Documentation & Resources
UG-197: iCoupler ADuM347x Quad-Channel Isolators with Integrated Transformer Driver11/1/2010653 kB
Digital Isolation and Interface Technology Selection Guide2/7/20204 M
Enhanced Protection with the Latest iCoupler® Digital Isolation2/7/20202 M
Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary12/10/2010291 kB
NAppkin Note: Lowering the Power of the ADuM524x12/10/2010223 kB
InsideiCoupler® Technology: ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary11/1/2010
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|ADUM3474ARSZ||Material Declaration||Reliability Data||20-Lead SSOP|
|ADUM3474ARSZ-RL7||Material Declaration||Reliability Data||20-Lead SSOP|
|ADUM3474CRSZ||Material Declaration||Reliability Data||20-Lead SSOP|
|ADUM3474CRSZ-RL7||Material Declaration||Reliability Data||20-Lead SSOP|
|ADUM3474WARSZ||Material Declaration||Reliability Data||20-Lead SSOP|
|ADUM3474WARSZ-RL7||Material Declaration||Reliability Data||20-Lead SSOP|
|ADUM3474WCRSZ||Material Declaration||Reliability Data||20-Lead SSOP|
|ADUM3474WCRSZ-RL7||Material Declaration||Reliability Data||20-Lead SSOP|
|Wafer Fabrication Data|
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.