Overview
The ADM3493ARZ-REEL7 from Analog Devices Inc. is a low-power, half-duplex differential line transceiver designed for RS-485 and RS-422 communication. It operates on a single 3.3 V power supply, making it ideal for power-sensitive applications. The device features a slew rate limited driver to minimize Electromagnetic Interference (EMI) and reduce reflections caused by improperly terminated cables, ensuring error-free data transmission up to 250 kbps. It includes one driver and one receiver, and its low power consumption, coupled with a shutdown mode, makes it suitable for a variety of communication systems.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 3.3 V |
| Data Rate | Up to 250 kbps |
| Communication Mode | Half Duplex |
| Package Type | 8-Lead SOIC (Small Outline IC) |
| Operating Temperature Range | -40°C to +85°C |
| Bus Common-Mode Range | -7 V to +12 V |
| Receiver Input Impedance | 96 kΩ |
| Maximum Number of Transceivers on Bus | Up to 256 |
| Shutdown Mode Supply Current | Typically 2 nA |
| Propagation Delay Skew | Typically under 100 ns (driver), 20 ns (receiver) |
Key Features
- Slew rate limited driver to minimize EMI and reduce reflections.
- Low power consumption with a shutdown mode drawing typically 2 nA of supply current.
- Thermal shutdown circuit to prevent excessive power dissipation.
- Fail-safe feature in the receiver resulting in a logic high output state if inputs are open.
- Current limit protection on the output stage to prevent short circuits.
- Half duplex communication capability.
Applications
- Low power RS-485 applications.
- EMI sensitive systems.
- DTE-DCE interfaces.
- Industrial control systems.
- Packet switching networks.
- Local area networks.
- Level translators.
Q & A
- What is the primary function of the ADM3493ARZ-REEL7? The primary function is to act as a half-duplex differential line transceiver for RS-485 and RS-422 communication.
- What is the operating voltage of the ADM3493ARZ-REEL7? The operating voltage is 3.3 V.
- What is the maximum data rate supported by the ADM3493ARZ-REEL7? The maximum data rate is up to 250 kbps.
- What type of package does the ADM3493ARZ-REEL7 come in? It comes in an 8-Lead SOIC package.
- What is the operating temperature range of the ADM3493ARZ-REEL7? The operating temperature range is -40°C to +85°C.
- How many transceivers can be connected on the bus? Up to 256 transceivers can be connected on the bus.
- What is the typical supply current in shutdown mode? The typical supply current in shutdown mode is 2 nA.
- What is the purpose of the slew rate limited driver? The slew rate limited driver minimizes EMI and reduces reflections caused by improperly terminated cables.
- What protection mechanisms are included in the ADM3493ARZ-REEL7? It includes current limit protection and a thermal shutdown circuit.
- In what applications is the ADM3493ARZ-REEL7 commonly used? It is commonly used in low power RS-485 applications, EMI sensitive systems, industrial control, and local area networks.
