Overview
The ADM1490EBRZ-REEL7, produced by Analog Devices Inc., is a high-performance RS-485/RS-422 transceiver designed for balanced data transmission. This device is part of the ADM1490E/ADM1491E series and is optimized for use in applications requiring reliable and high-speed data communication. It operates from a single 5 V power supply and is compliant with TIA/EIA-485-A-98 and TIA/EIA-422-B standards. The transceiver features a differential line driver and a differential line receiver, making it suitable for full-duplex data transmission.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.75 | 5 | 5.25 | V | |
| Maximum Data Rate | 16 | Mbps | ||||
| Propagation Delay | tDPLH, tDPHL | 11 | 17 | ns | RL = 54 Ω, CL = 100 pF | |
| Driver Output Skew | tSKEW | 0.5 | 2 | ns | RL = 54 Ω, CL = 100 pF | |
| Rise Time/Fall Time | tDR, tDF | 8 | 15 | ns | RL = 54 Ω, CL = 100 pF | |
| Receiver Input Impedance | 12 kΩ | |||||
| Short-Circuit Current | ±250 mA | During fault conditions | ||||
| Thermal Shutdown Temperature | 150°C |
Key Features
- Compliance with TIA/EIA-485-A-98 and TIA/EIA-422-B standards for reliable data transmission.
- Differential line driver and receiver for balanced data transmission.
- Single 5 V power supply operation with ±5% tolerance.
- High-speed data transmission up to 16 Mbps.
- Low propagation delay and skew to ensure high baud rate operation.
- Short-circuit protection and thermal shutdown to prevent excessive power dissipation.
- Electrostatic discharge protection up to ±8 kV using the human body model (HBM).
- Fail-safe receiver feature that results in a logic high output state if inputs are unconnected.
Applications
- Motor control systems requiring high-speed data communication.
- Industrial automation and control systems where reliable data transmission is critical.
- Point-of-sale terminals and other commercial equipment needing robust serial communication.
- Medical devices and diagnostic equipment that require precise and reliable data transmission.
- Telecommunications and networking equipment for reliable serial communication.
Q & A
- What is the maximum data rate supported by the ADM1490EBRZ-REEL7?
The ADM1490EBRZ-REEL7 supports data rates up to 16 Mbps.
- What are the power supply requirements for this transceiver?
The device operates from a single 5 V power supply with ±5% tolerance.
- What is the receiver input impedance of the ADM1490EBRZ-REEL7?
The receiver input impedance is 12 kΩ.
- Does the ADM1490EBRZ-REEL7 have short-circuit protection?
Yes, it has short-circuit protection that limits the maximum output current to ±250 mA during fault conditions.
- What is the thermal shutdown temperature for this device?
The thermal shutdown temperature is 150°C.
- Is the ADM1490EBRZ-REEL7 protected against electrostatic discharge?
Yes, it has electrostatic discharge protection up to ±8 kV using the human body model (HBM).
- What is the fail-safe feature of the receiver in the ADM1490EBRZ-REEL7?
The receiver features a fail-safe that results in a logic high output state if the inputs are unconnected.
- Can the ADM1490EBRZ-REEL7 be used in motor control applications?
Yes, it is designed for use in motor control applications requiring high-speed data communication.
- What is the propagation delay of the ADM1490EBRZ-REEL7?
The propagation delay is between 11 ns and 17 ns.
- How many nodes can be connected on the differential bus with the ADM1490EBRZ-REEL7?
Up to 32 nodes can be connected on the differential bus.
