Details

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BUY ADM4853ARZ-REEL7 https://www.utsource.net/itm/p/6443688.html
5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers

Parameter	Description	Min	Typ	Max	Unit
Supply Voltage (VDD)	Operating supply voltage range	3.0	-	5.5	V
Supply Current (IDD)	Supply current at 3.3V, typical	-	225	-	μA
Data Rate	Maximum data rate	-	-	250	kbps
Differential Output Voltage (VOD)	Differential output voltage at 100Ω load	1.35	-	1.65	V
Differential Input Voltage Range (VID)	Differential input voltage range	-0.7	-	12.0	V
Common-Mode Input Voltage Range (VICR)	Common-mode input voltage range	-7.0	-	12.0	V
Input Impedance (ZIN)	Differential input impedance	-	10k	-	Ω
Output Impedance (ZOUT)	Differential output impedance	-	100	-	Ω
Rise Time (tR)	Rise time	-	15	-	ns
Fall Time (tF)	Fall time	-	15	-	ns
Propagation Delay (tPDL, tPDH)	Propagation delay low to high, high to low	-	150	-	ns
Skew (tSK)	Propagation delay skew	-	20	-	ns
Operating Temperature Range (TA)	Ambient operating temperature range	-40	-	85	°C
Storage Temperature Range (TSTG)	Storage temperature range	-65	-	150	°C

Instructions for Use:

1. Power Supply:

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

2. Data Lines:

   • Connect the differential data lines (A and B) to the corresponding pins on the device.
   • Ensure the differential input voltage range (VID) is between -0.7V and 12.0V.
   • The common-mode input voltage range (VICR) should be between -7.0V and 12.0V.

3. Termination:

   • For optimal performance, terminate the differential lines with a 100Ω resistor across A and B.

4. Signal Integrity:

   • Keep the trace lengths as short as possible to minimize signal degradation.
   • Use controlled impedance traces if possible to maintain signal integrity.

5. Temperature Considerations:

   • Operate the device within the ambient temperature range of -40°C to 85°C.
   • Store the device within the storage temperature range of -65°C to 150°C.

6. Electrostatic Discharge (ESD) Protection:

   • Handle the device with appropriate ESD precautions to avoid damage.
   • Use ESD-safe tools and work surfaces when handling the device.

7. Grounding:

   • Ensure proper grounding to reduce noise and improve signal quality.
   • Use a star grounding technique to minimize ground loops.

8. Testing and Debugging:

   • Use an oscilloscope to monitor the rise and fall times, propagation delays, and differential output voltages.
   • Check for any skew in the propagation delays to ensure consistent performance.

9. Compliance:

   • Ensure the device complies with relevant standards and regulations for your application, such as RS-485 standards.

10. Documentation:

    • Refer to the datasheet and application notes for detailed information and specific use cases.

(For reference only)