Analog Devices / Maxim Integrated MAX14483 SPI Digital Isolator IC

Analog Devices Inc. MAX14483 SPI Digital Isolator features six isolated channels individually optimized for SPI applications. This device includes very low propagation delay on the SDI, SDO, and SCLK channels. The SDO channel's tri-state control is enabled by the CS input and a second enable control input pin (SDOEN), allowing a single MAX14483 to isolate multiple SPI devices. ADI MAX14483 is a 3.75kV_RMS digital galvanic isolator using Maxim's proprietary process technology. The isolator is housed in a 20-pin SSOP package and is rated for -40°C to 125°C.

Features

Six isolated channels in a 20-SSOP package
Low propagation delay on SCLK, SDI, and SDO
- Up to 100MHz clock, 200Mbps data rate
- 10ns typical propagation delay
- 2ns maximum pulse width distortion
- 250ps typical peak jitter
Robust galvanic isolation of digital signals
- Withstands 3.75kV_RMS for 60s (V_ISO)
- Continuously withstands 450V_RMS (V_IOWM)
- Withstands ±10kV surge between GNDA and GNDB with 1.2/50µs waveform
- High CMTI (50kV/µs, typical)

Flexible system design
- Wide 1.71V to 5.5V voltage range on each side
- SDOEN control pin for sharing isolators
- Open-drain FAULT channel for shared interrupt on the master side
- Auxiliary channel for timing or control
Low power consumption
- 1.53mW per channel at SCLK = 10MHz with V_DD = 3.3V
- 0.77mW per channel at SCLK = 10MHz with V_DD = 1.8V