ADM2495E Datasheet

• 5.7kV_RMS isolated half-duplex RS-485/RS-422 transceiver
• ±60V fault protection on RS-485 A and B pins
• Meets EN 55032 Class B radiated emissions on a 2-layer PCB
• Robust protection on the RS-485 A and B bus pins
  • ≥ ±4kV IEC 61000-4-2 ESD
  • ±10kV HBM ESD
  • ≥ ±4kV IEC 61000-4-4 EFT
• Extended ±25V common-mode range
• Two speed options
  • ADM2495E - low speed 250kbps for EMI control
• Flexible power supply inputs
  • Primary V_DD1 supply of 1.7V to 5.5V
  • Isolated V_DD2 supply of 3.0V to 5.5V
• PROFIBUS compliant for 5V V_DD2
• Wide operating temperature range: −40°C to +125°C
• High common-mode transient immunity: 250kV/μs
• Short-circuit, open-circuit, and floating input receiver fail-safe
• Supports >224 bus nodes (112kΩ receiver input impedance)
• Full hot-swap support (glitch free power-up/power-down)
• Safety and regulatory approvals
  • IEC 60747-17 (pending)
    • Reinforced V_IORM = 1500V_PEAK
  • UL 1577 (pending)
    • V_ISO= 5700V_RMS for 1 minute
  • IEC/EN/CSA 62368-1 (pending)
  • IEC/EN/CSA 61010-1 (pending)
  • IEC/CSA 60601-1 (pending)
  • GB 4943.1 (pending)
• Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E)
• 16‑lead, wide body, standard SOIC_W package with 8.1 mm creepage and clearance in standard pinout

• Solar inverters
• Electrical test and measurement
• Heating, ventilation, and air conditioning (HVAC) networks
• Industrial field buses
• Building automation

The ADM2495E are 5.7kV_RMS, signal isolated RS-485 transceivers with ±60V fault protection on the RS-485 A and B pins. These devices are designed for balanced transmission lines and comply with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E). The devices can pass radiated emissions testing to the EN 55032 Class B standard with margin on a 2-layer printed circuit board (PCB) with high-frequency decoupling capacitors. The isolation barrier provides robust system level immunity to IEC 61000-4-x system level electromagnetic compatibility (EMC) standards. The devices are suitable for applications that require reinforced insulation against working voltages of 1060V_RMS and 1500V_DC for the lifetime of the device. The devices are protected against ±4kV contact IEC 61000-4-2 and ±15kV human body model (HBM) electrostatic discharge (ESD) events on the RS-485 A and B pins and ±8kV contact IEC 61000-4-2 ESD across the barrier without latch-up or damage.

The ADM2495E feature over voltage protection on the RS-485 A and B pins to withstand up to ±60V dc or ac peak to the transceiver side GND2. This allows for robust protection against transients and accidental connection to ±12V and ±24V power supplies. The common mode range of the device is extended to ±25V for applications with large ground offsets and long cable runs.

The ADM2495E are half-duplex transceivers. The ADM2495E has a reduced slew rate with 250kbps speed for operation over long cable runs with lower emissions. The high differential output voltage makes these devices suitable for PROFIBUS^® nodes when powered with 5V on the V_DD2 supply. The VDD1 primary supply and V_DD2 isolated supply both support a wide range of voltages (1.7V to 5.5V and 3.0V to 5.5V, respectively). The ADM2495E is available in the industry standard 16‑lead, wide body, standard SOIC_W package with 8.1mm creepage and clearance.