Data Sheet

ManualsBrandsAtlasScientific ManualsMiscellaneous SensorsAtlas Scientific Dissolved Oxygen Sensor Kit

r 0.1

This schematic shows exactly how we isolate data and power using the ADM3260

and a few passive components. The ADM3260 can output isolated power up to 150 mW

and incorporates two bidirectional data channels.

This technology works by using tiny transformers to induce the voltage across an air gap.

PCB layout requires special attention for EMI/EMC and RF Control, having proper ground

planes and keeping the capacitors as close to the chip as possible are crucial for proper

performance. The two data channels have a 4.7kΩ pull up resistor on both the isolated

and non-isolated lines (R1, R2, R3, and R4) The output voltage is set using a voltage

divider (R5, R6, and R,7) this produces a voltage of 3.7V regardless of your input voltage.

Isolated ground is different from non-isolated ground, these two lines should not

be connected together.

10uF

0.1uf

VDDP

ADM3260

HDR_BTM

ISO-VCC

R5 R7

1.5K

10uF

0.1uF

1.5K

4.7K

VDDISO

VISO

VSEL

NCNC

SCL1

SDA1

SCL2

SDA2

VIN

GNDP

GNDISO

GNDP

PDIS

VCC

RX/SCL

TX/SDA

GND

ISO-GND

GND

R2 R14.7K 4.7K

HDR_TOP

VCC

RX/SCL

TX/SDA

GND

Non-isolated Isolated