Reinforced, Ultra-Low-Power, 4-Channel Digital Isolators

The MAX22440-MAX22442, MAX22840-MAX22842, and MAX22880-MAX22882 are a family of 4-channel, reinforced, ultra-low-power digital galvanic isolators using Analog Devices proprietary process technology. The MAX22440-MAX22442 are in a 16-QSOP package with a withstand voltage rating of 3kVRMS for 60 seconds, the MAX22840-MAX22842 are in a 16 wide SOIC package with a withstand voltage rating of 5kVRMS for 60 seconds, and the MAX22880-MAX22882 are in a 20-SSOP package with a withstand voltage rating of 3.75kVRMS for 60 seconds. Devices are rated for operation at ambient temperatures from -40°C to +125°C.

The devices transfer digital signals between circuits with different power domains, using as little as 77.04μW per channel at 1Mbps (1.8V supply). The ultra-low-power feature reduces system dissipation, increases reliability, and enables compact designs. Devices are available with a maximum data rate of 10Mbps and with default-high or default-low outputs. The devices feature low propagation delay and low clock jitter, which reduces system latency. Independent 1.71V to 5.5V supplies on each side also make the devices suitable for use as level translators. All four channels of the MAX22440/840/880 transfer data in the same direction. Three out of four channels of the MAX22441/841/881 transfer data in one direction while the other one transfers data in the opposite direction. Two channels of the MAX22442/842/882 transfer data in one direction and the other two in the opposite direction.

APPLICATIONS

* 4-20mA Loop Process Control

* Compact Micro PLC

* Battery Management

* Parasitically Powered Applications

* Ultra-Low Power Consumption

* 9.6μA per Channel at DC with VDD = 3.3V

* 13.2μA per Channel at 100kbps with VDD = 3.3V

* 47.6μA per Channel at 1Mbps with VDD = 3.3V

* Wide Operating Voltage Range from 1.71V to 5.5V

* Reinforced Galvanic Isolation of Digital Signals

* Withstands ±10kV Surge between GNDA and GNDB with 1.2μs/50μs Waveform

* High CMTI (200kV/μs, min)

* MAX22440-MAX22442 in 16 QSOP Package:

* 3000VRMS Isolation Voltage for 60s (VISO)

* 445VRMS Continuous Working Voltage (VIOWM)

* MAX22840-MAX22842 in 16 Wide SOIC Package:

* 5000VRMS Isolation Voltage for 60s (VISO)

* 848VRMS Continuous Working Voltage (VIOWM)