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Name: LTM2881MPY-5#PBF
Brand: Analog Devices Inc.
SKU: LTM2881MPY-5#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Analog Devices Inc. LTM2881MPY-5#PBF

Part No.:: LTM2881MPY-5#PBF

Manufacturer:: Analog Devices Inc.

Package:: 32-BBGA Module

Datasheet:: LTM2881MPY-5#PBF.pdf

Description:: DGTL ISO 2.5KV RS422/RS485 32BGA

In Stock:: 3382

Quantity:: Add To Cart

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LTM2881MPY-5#PBF Specifications

Packaging:
Tray
Series:
µModule®
ProductStatus:
Active
Technology:
Magnetic Coupling
Type:
RS422, RS485
IsolatedPower:
Yes
NumberofChannels:
2
Inputs-Side1/Side2:
1/1
ChannelType:
Unidirectional
Voltage-Isolation:
2500Vrms
CommonModeTransientImmunity(Min):
30kV/µs
DataRate:
20Mbps
PropagationDelaytpLH/tpHL(Max):
-
PulseWidthDistortion(Max):
-
Rise/FallTime(Typ):
-
Voltage-Supply:
4.5V ~ 5.5V
OperatingTemperature:
-55°C ~ 105°C
MountingType:
Surface Mount

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LTM2881MPY-5#PBF information

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LTM2881MPY-5#PBF Typical application Circuitry

LTM2881MPY-5#PBF is a galvanically isolated RS485 transceiver chip, commonly used in industrial and automotive applications for communication between systems with different ground potentials. It features high data rates, low power consumption, and robust isolation.

Application Scenario:

In a factory automation setup, LTM2881MPY-5#PBF can be utilized for communication between PLCs, motor controllers, and sensors while maintaining isolation to prevent ground loops and ensure system reliability.

Circuit Design:

To design an RS485 communication system using LTM2881MPY-5#PBF, follow these steps:

1. Isolation Barrier:

Place the LTM2881MPY-5#PBF chip between the RS485 transceiver and the microcontroller to provide galvanic isolation. Connect the isolated side to the microcontroller's UART interface and the non-isolated side to the RS485 bus.

2. Signal Conditioning:

Ensure proper termination resistors (typically 120Ω) are connected at both ends of the RS485 bus to match the characteristic impedance. Implement surge protection devices, such as TVS diodes, to safeguard against voltage spikes.

3. Power Supply:

Provide separate power supplies for the isolated and non-isolated sides of the LTM2881MPY-5#PBF chip. Use low-dropout voltage regulators and filter capacitors to ensure stable power delivery.

4. Data Communication:

Configure the microcontroller's UART peripheral to communicate with LTM2881MPY-5#PBF for data transmission and reception. Set the appropriate baud rate and frame format to match the requirements of the RS485 network.

5. Grounding:

Implement proper grounding techniques, such as star grounding, to minimize ground loop effects and ensure reliable communication. Keep the ground connections separate between the isolated and non-isolated sides of the circuit.

Considerations:

When designing the circuit, it's essential to consider:

- Isolation Voltage: Ensure that the isolation barrier of LTM2881MPY-5#PBF meets the requirements for the application, considering factors like transient voltage spikes.

- Data Integrity: Implement error-checking mechanisms, such as CRC, to detect and correct data transmission errors over the RS485 bus.

- EMC/EMI Compliance: Design the PCB layout and enclosure to minimize electromagnetic interference and ensure compliance with EMC regulations.

- Temperature Range: Verify that the LTM2881MPY-5#PBF chip operates within the specified temperature range for the application environment.

- Bus Length: Consider the maximum allowable bus length for the RS485 network and adjust termination and signal conditioning accordingly to maintain signal integrity.

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6. What is the process for return or replacement of LTM2881MPY-5#PBF?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LTM2881MPY-5#PBF we delivered, we will accept the replacement or return of the LTM2881MPY-5#PBF only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of LTM2881MPY-5#PBF.

(3)The PartNo is unused and only in the original unpacked packaging.

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(1)Inform us within 90 days

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