Details

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BUY ADM2485BRWZ https://www.utsource.net/itm/p/12535387.html

Parameter	Description	Min	Typ	Max	Unit
Operating Voltage (VDD)	Supply voltage range	3.0	-	5.5	V
Output Current (IOL)	Output low current	-	-	-16	mA
Input Current (IIH)	Input high current	-	1	10	μA
Data Rate	Maximum data rate	-	-	50	Mbps
Propagation Delay	Time delay from input to output	-	15	-	ns
Skew	Maximum difference in propagation delay between channels	-	3	-	ns
Common-Mode Input Voltage Range	Range of common-mode input voltage	-7	-	12	V
Differential Input Voltage Range	Range of differential input voltage	-25	-	25	V
Isolation Voltage	Maximum isolation voltage	-	-	2500	Vrms
Operating Temperature	Temperature range for operation	-40	-	85	°C
Storage Temperature	Temperature range for storage	-65	-	150	°C

Instructions for Using ADM2485BRWZ

1. Power Supply:

   • Ensure the supply voltage (VDD) is within the specified range of 3.0V to 5.5V.
   • Connect the ground (GND) pin to the system ground.

2. Signal Connections:

   • Connect the differential input pins (A, B) to the RS-485 bus.
   • Connect the differential output pins (Y, Z) to the RS-485 bus.
   • The driver enable (DE) and receiver enable (RE) pins control the direction of data flow:
     • Set DE high to enable the driver.
     • Set RE low to enable the receiver.
     • For half-duplex operation, connect DE and RE together.

3. Termination:

   • Use termination resistors (120Ω) at both ends of the RS-485 bus to minimize reflections and improve signal integrity.

4. Isolation:

   • The ADM2485BRWZ provides galvanic isolation up to 2500Vrms. Ensure that the isolation barrier is not exceeded to avoid damage.

5. Temperature Considerations:

   • Operate the device within the temperature range of -40°C to 85°C for reliable performance.
   • Store the device within the temperature range of -65°C to 150°C.

6. Data Rate:

   • The maximum data rate supported is 50 Mbps. Ensure that the communication protocol and system design are compatible with this rate.

7. Propagation Delay and Skew:

   • Account for the propagation delay of 15 ns and skew of 3 ns when designing the timing of your system.

8. Common-Mode and Differential Input Voltage:

   • Ensure that the common-mode input voltage range (-7V to 12V) and differential input voltage range (-25V to 25V) are not exceeded to prevent damage to the device.

9. ESD Protection:

   • Handle the device with proper ESD precautions to avoid damage from static electricity.

10. PCB Layout:

    • Follow recommended PCB layout guidelines to ensure optimal performance and reliability. Keep signal traces short and use ground planes to reduce noise and interference.

(For reference only)