Overview
The ADM488AN, produced by Analog Devices Inc., is a low-power, full-duplex differential line transceiver designed for communication on multipoint bus transmission lines. It complies with both EIA RS-485 and RS-422 standards, making it suitable for balanced data transmission. The device operates from a single 5 V ± 10% power supply and is fabricated using BiCMOS technology, combining low power CMOS with fast switching bipolar technology. This transceiver is ideal for applications requiring robust and reliable data transmission in electrically harsh environments.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V |
| Data Rate | Up to 250 kbps |
| Bus Common-Mode Range | −7 V to +12 V |
| Input Impedance | 12 kΩ |
| Number of Drivers/Receivers | 1/1 |
| Operating Temperature | −40°C to +85°C |
| Package Type | SOIC, PDIP, TSSOP |
| ESD Protection | 2 kV EFT (IEC1000-4-4) |
| EM Immunity | Meets IEC1000-4-3 |
| Supply Current | 30 μA |
Key Features
- Compliance with EIA RS-485 and RS-422 standards
- Full-duplex data transmission capability
- Low power consumption with a supply current of 30 μA
- Reduced slew rate for low EM interference
- Short-circuit protection and thermal shutdown circuit
- Fail-safe feature resulting in a logic high output state if inputs are unconnected
- High EM immunity and noise immunity
- Ability to connect up to 32 transceivers on the differential bus
Applications
- Low power RS-485 and RS-422 systems
- DTE-DCE interface
- Packet switching
- Local area networks
- Data concentration and data multiplexers
- Integrated services digital network (ISDN)
Q & A
- What are the primary standards that the ADM488AN complies with?
The ADM488AN complies with both EIA RS-485 and RS-422 standards.
- What is the operating supply voltage range for the ADM488AN?
The operating supply voltage range is 4.5 V to 5.5 V.
- What is the maximum data rate supported by the ADM488AN?
The maximum data rate supported is up to 250 kbps.
- How many transceivers can be connected on the differential bus?
Up to 32 transceivers can be connected on the differential bus.
- What is the input impedance of the ADM488AN?
The input impedance is 12 kΩ.
- Does the ADM488AN have any protection against short circuits?
Yes, it has short-circuit protection and a thermal shutdown circuit to prevent excessive power dissipation.
- What is the operating temperature range for the ADM488AN?
The operating temperature range is −40°C to +85°C.
- What type of technology is used in the fabrication of the ADM488AN?
The ADM488AN is fabricated using BiCMOS technology, combining low power CMOS with fast switching bipolar technology.
- Does the ADM488AN have any fail-safe features?
Yes, the receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).
- What kind of ESD protection does the ADM488AN offer?
The ADM488AN offers 2 kV EFT protection according to IEC1000-4-4.
