Overview
The ADM1491EBRMZ-REEL7 is a high-speed, ESD-protected, full-duplex RS-485 transceiver designed and manufactured by Analog Devices Inc. This device is optimized for balanced transmission lines and complies with the TIA/EIA-485-A-98 standard. It is particularly suited for applications requiring high data rates, up to 16 Mbps, and is ideal for use in motor control and other industrial communication systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| 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 |
| Enable Time (tZH, tZL) | - | 20 | - | ns | - |
| Receiver Input Impedance | - | - | 12 kΩ | - | For unit load RS-485 operation |
| Short-Circuit Current | - | - | ±250 mA | - | During fault conditions |
| Thermal Shutdown Temperature | - | - | 150°C | - | Forces driver outputs into high impedance state |
Key Features
- Compliance with TIA/EIA-485-A-98 standard for balanced transmission lines.
- High data rate capability up to 16 Mbps.
- ESD protection up to ±8 kV using the human body model (HBM).
- Short-circuit protection and thermal shutdown circuitry to prevent excessive power dissipation.
- Fail-safe feature in the receiver that results in a logic high output state if inputs are unconnected (floating).
- Low propagation delay and minimal driver skew to minimize EMI interference.
- Operation from a single 5 V power supply.
- Available in 10-lead MSOP and 14-lead SOIC packages).
Applications
- Motor control applications requiring high-speed communications.
- Industrial automation and control systems).
- Automotive systems, including electronic cockpit, BMS solutions, and autonomous driving).
- Full-duplex data transmission in various industrial and commercial environments).
Q & A
- What is the maximum data rate supported by the ADM1491EBRMZ-REEL7?
The ADM1491EBRMZ-REEL7 supports data rates up to 16 Mbps).
- What is the receiver input impedance of the ADM1491EBRMZ-REEL7?
The receiver input impedance is 12 kΩ, allowing up to 32 nodes on the bus).
- Does the ADM1491EBRMZ-REEL7 have ESD protection?
Yes, it has ESD protection up to ±8 kV using the human body model (HBM)).
- What power supply voltage does the ADM1491EBRMZ-REEL7 operate from?
The device operates from a single 5 V power supply).
- What is the thermal shutdown temperature for the ADM1491EBRMZ-REEL7?
The thermal shutdown temperature is 150°C, which forces the driver outputs into a high impedance state).
- What is the fail-safe feature in the receiver of the ADM1491EBRMZ-REEL7?
The fail-safe feature results in a logic high output state if the inputs are unconnected (floating)).
- What are the available package options for the ADM1491EBRMZ-REEL7?
The device is available in 10-lead MSOP and 14-lead SOIC packages).
- What is the short-circuit current limit during fault conditions?
The short-circuit current is limited to ±250 mA during fault conditions).
- Is the ADM1491EBRMZ-REEL7 suitable for full-duplex data transmission?
Yes, it is suitable for full-duplex data transmission).
- What are some typical applications of the ADM1491EBRMZ-REEL7?
Typical applications include motor control, industrial automation, and automotive systems).
