The ADM3065E is a 3.0 V to 5.5 V, IEC electrostatic discharge (ESD) protected RS-485 transceiver, allowing the device to withstand ±12 kV contact discharges on the transceiver bus pins without latch-up or damage. The ADM3066E features a VIO logic supply pin allowing a flexible digital interface capable of operating as low as 1.62 V.
The ADM3065E/ADM3066E are suitable for high speed, 50 Mbps, bidirectional data communication on multipoint bus transmission lines. The ADM3065E/ADM3066E feature a ¼ unit load input impedance, which allows up to 128 transceivers on a bus.
The ADM3065E/ADM3066E are half-duplex RS-485 transceivers, fully compliant to the Profibus® standard with increased 2.1 V bus differential voltage at VCC ≥ 4.5 V.
The RS-485 transceivers are available in a number of space-saving packages, such as a 10-lead, 3 mm × 3 mm LFCSP package, an 8-lead, 3 mm × 3 mm MSOP package, a 10-lead, 3 mm × 3 mm MSOP package, and an 8-lead, narrow body SOIC package. Models with operating temperature ranges of −40°C to +125°C and −40°C to +85°C are available.
Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit. If, during fault conditions, a significant temperature increase is detected in the internal driver circuitry, this feature forces the driver output into a high impedance state.
The ADM3065E/ADM3066E guarantee a logic high receiver output when the receiver inputs are shorted, open, or connected to a terminated transmission line with all drivers disabled.
**Applications**
Industrial fieldbuses
Process control
Building automation
Profibus networks
Motor control servo drives and encoders
### Features and Benefits
TIA/EIA RS-485 compliant over full supply range
3.0 V to 5.5 V operating voltage range on VCC
ESD protection on the bus pins
IEC 61000-4-2 ≥ ±12 kV contact discharge
IEC 61000-4-2 ≥ ±12 kV air discharge
HBM ≥ ±30 kV
Full hot swap support (glitch free power-up/power-down)
High speed 50 Mbps data rate
Full receiver short circuit, open circuit, and bus idle failsafe
