ADUM3471 Isolated Switching Regulators (3/1 Channel Directionality)
Applications
RS-232/RS-422/RS-485 transceivers
Industrial field bus isolation
Power supply startup bias and gate drives
Isolated sensor interfaces
Process controls
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.
Applications
- RS-232/RS-422/RS-485 transceivers
- Industrial field bus isolation
- Power supply startup bias and gate drives
- Isolated sensor interfaces
- Process controls
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
| Reference Designs |
Data Sheets
User Guides
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| ADUM3471ARSZ Production | 20 ld SSOP | OTH 66 | -40 to 105C | 3.32 | 2.88 | Y |
| ADUM3471ARSZ-RL7 Production | 20 ld SSOP | REEL 500 | -40 to 105C | 0 | 2.88 | Y |
| ADUM3471CRSZ Production | 20 ld SSOP | OTH 66 | -40 to 105C | 4.53 | 3.93 | Y |
| ADUM3471CRSZ-RL7 Production | 20 ld SSOP | REEL 500 | -40 to 105C | 0 | 3.93 | Y |
| ADUM3471WARSZ Production | 20 ld SSOP | OTH 66 | -40 to 105C | 3.9 | 3.45 | Y |
| ADUM3471WARSZ-RL7 Production | 20 ld SSOP | REEL 500 | -40 to 105C | 0 | 3.45 | Y |
| ADUM3471WCRSZ Production | 20 ld SSOP | OTH 66 | -40 to 105C | 5.34 | 4.73 | Y |
| ADUM3471WCRSZ-RL7 Production | 20 ld SSOP | REEL 500 | -40 to 105C | 0 | 4.73 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| EVAL-ADUM3471EBZ | Evaluation Board | 60 | Y |
Reference Materials
