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ISO3082DWR

2.5kV isolated RS-485 200kbps, half-duplex, SOIC-16W, requires ext iso power

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Pieza del fabricante：

ISO3082DWR

Paquete：

SOIC-16W (10.3 x 7.5 x 2.65 mm)

Marca：
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Descripción

Productos

The ISO3082DWR from Texas Instruments is a galvanically isolated RS-485/RS-422 transceiver with 2500V RMS isolation in a 16-pin SOIC-W package. Operating at 200kbps with 3.3V or 5V supply, it provides bus-side ESD protection and half-duplex communication for industrial networks.

Especificaciones

Velocidad de datos 200 kbps
Tensión de aislamiento 2500 Vrms
Configuración Half-Duplex RS-485/RS-422
Tensión de alimentación 3.3V or 5V (logic side)
Bus Nodes Up to 160
ESD Protection +/-16 kV (bus pins, HBM)
Common-Mode Range -7V to +12V
Temperatura de funcionamiento -40 to +85 C
Paquete SOIC-16W (wide)

Características

  • 2500V RMS galvanic isolation
  • 200kbps data rate
  • Half-duplex RS-485/RS-422
  • +/-16kV ESD on bus pins (HBM)
  • 3.3V or 5V logic-side supply
  • Up to 160 bus nodes
  • Fail-safe receiver inputs
  • Hot-plug capable
  • Low bus capacitance: 6pF

Aplicaciones

  • Isolated RS-485 fieldbus interfaces
  • Industrial automation networks
  • Motor drive communication
  • Isolated UART links

The ISO3082DWR from Texas Instruments is a galvanically isolated half-duplex RS-485/RS-422 transceiver providing 2500V RMS isolation between the logic side and bus side in a 16-pin wide-body SOIC package. Unlike the ADM2587E which integrates isolated DC-DC power, the ISO3082 requires an external isolated power supply for the bus side, but offers a simpler isolation barrier. Operating at 200kbps with +/-16kV ESD protection on bus pins, 160-node capability, and 3.3V or 5V logic-side supply, it is well-suited for long-distance Modbus and PROFIBUS fieldbus networks.

The ISO3082 operates through four subsystems: (1) Capacitive Isolation Barrier: TI isoLogic capacitive coupling technology transfers digital signals across a silicon dioxide isolation barrier rated at 2500V RMS for 1 minute. (2) RS-485 Transceiver: A standard differential RS-485 driver and receiver on the bus side support 200kbps data rate with fail-safe receiver inputs (open/shorted bus defaults to logic high). (3) Power Isolation: Unlike the ISO3088 or ADM2587E, the ISO3082 does NOT include an integrated isolated DC-DC converter. An external isolated 5V supply must power the VCC2 (bus-side) pin. (4) Protection: +/-16kV HBM ESD on bus pins, -7V to +12V common-mode input range, and hot-plug capability with glitch-free power-up/down.

Pin Nombre Tipo Descripción
1 VCC1 Potencia Logic-side supply (3.3V or 5V)
2 RXD Salida Received data output
3 DE Entrada Driver enable (active high)
4 /RE Entrada Receiver enable (active low)
5 TXD Entrada Transmit data input
6 GND1 Potencia Logic-side ground
8 VCC2 Potencia Isolated bus-side supply (5V, external)
9 GND2 Potencia Isolated bus-side ground
13 B E/S RS-485 bus B (inverting)
14 A E/S RS-485 bus A (non-inverting)
  • Isolated Modbus RTU RS-485 networks with external isolated 5V supply
  • Industrial motor drive RS-485 communication with 2500V isolation
  • Building automation fieldbus with +/-16kV ESD protection on bus pins
  • Isolated UART links where external DC-DC is already available
Modelo Fabricante Isolation Speed Notas
ISO3088DWR TI 2500V 200kbps With integrated DC-DC
ADM2587EBRWZ ADI 2500V 500kbps Integrated isoPower
ISO1176DWR TI 2500V 40Mbps High-speed, ext power
RHV3521-EVKIT Renesas 2500V 500kbps Alternative vendor
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