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ISO7231CDWR

Triple digital isolator, 2.5kVrms, 2-fwd/1-rev, 25Mbps, SOIC-16W

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Pieza del fabricante：

ISO7231CDWR

Paquete：

SOIC-16W (10.3 x 7.5 mm)

Marca：
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Compromiso de calidad
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Descripción

Productos

The ISO7231CDWR from Texas Instruments is a triple-channel high-speed digital isolator with 2 forward and 1 reverse channel, 2.5kV rms isolation, and 25Mbps data rate in SOIC-16 package. With 25kV/us minimum CMTI and capacitive SiO2 isolation barrier, it provides robust signal isolation for industrial communication interfaces.

Especificaciones

Canales 3 (2 forward, 1 reverse)
Tensión de aislamiento 2500 V rms
Velocidad de datos 25 Mbps
Retardo de propagación 42 ns max
Distorsión de la anchura de impulsos 2.5 ns max
CMTI 25 kV/us min, 50 kV/us typ
Tensión de alimentación 3.15 V to 5.5 V (each side)
Default Output High (failsafe)
Paquete SOIC-16W (DW)
Temperatura de funcionamiento -40 to +125 C

Características

  • 2 forward + 1 reverse channel configuration for bidirectional interfaces like SPI
  • 2.5kV rms isolation per UL 1577 with SiO2 capacitive barrier
  • 25kV/us minimum CMTI for noisy industrial environments
  • 3.3V or 5V operation on either side with level translation
  • Low pulse width distortion of 2.5ns max for precise timing
  • Failsafe high output when input is unpowered or undriven

Aplicaciones

  • Isolated SPI bus for ADC/DAC data acquisition
  • Modbus and Profibus fieldbus isolation
  • Motor drive communication interface isolation
  • Industrial I/O module signal isolation
  • Medical equipment patient isolation barriers

The ISO7231CDWR from Texas Instruments is a triple-channel high-speed digital isolator featuring 2 forward and 1 reverse unidirectional channels with 2.5kV rms galvanic isolation. Using TI proprietary SiO2 capacitive isolation technology, the device provides 25Mbps data rate with only 42ns maximum propagation delay and 2.5ns maximum pulse width distortion. The 25kV/us minimum common-mode transient immunity ensures reliable operation in electrically noisy industrial environments. Both sides operate from 3.15V to 5.5V, enabling level translation between 3.3V and 5V logic domains. The failsafe output defaults to logic high when the input is unpowered or undriven, preventing false data transmission.

The ISO7231CDWR operates using TI SiO2 capacitive isolation technology. (1) Each channel consists of a CMOS encoder on the input side that modulates the digital signal into high-frequency pulses, which are coupled across the SiO2 isolation barrier by on-chip capacitors. The decoder on the output side reconstructs the original digital signal. (2) The two forward channels carry signals from side 1 to side 2, while the one reverse channel carries a signal from side 2 to side 1, enabling bidirectional communication such as SPI (SCLK, MOSI forward, MISO reverse). (3) A periodic refresh mechanism continuously sends update pulses across the barrier to maintain correct DC output levels. If the refresh pulse is not received, the failsafe circuit drives the output to logic high.

Pin Nombre Función
1 VCC1 Side 1 supply (3.15-5.5V)
2 INA Channel A input (forward)
3 INB Channel B input (forward)
4 OUTC Channel C output (reverse)
5 GND1 Side 1 ground
6 EN1 Enable channel C
7-8 NC Sin conexión
9 GND2 Side 2 ground
10 OUTA Channel A output (forward)
11 OUTB Channel B output (forward)
12 INC Channel C input (reverse)
13 VCC2 Side 2 supply (3.15-5.5V)
14 EN2 Enable channels A and B
15-16 NC Sin conexión
  • Isolated SPI bus for ADC/DAC data acquisition systems with MISO reverse channel
  • Modbus RTU and Profibus fieldbus node galvanic isolation
  • Motor drive serial communication interface with ground loop prevention
  • Industrial PLC digital I/O module 3-channel signal isolation
  • Medical equipment patient-connected interface isolation barrier
Modelo Fabricante Diferencia clave
ISO7230CDWR TI 3 forward channels
ISO7231MDWR TI 150Mbps high-speed version
ADUM1301BRWZ-RL Dispositivos analógicos iCoupler, 10Mbps, SOIC-16W
SI8631BC-B-IS Laboratorios Silicon 3-ch, 150Mbps, narrow SOIC
ISO7731FDWR TI Newer generation, 100Mbps
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