Texas Instruments ISO7041/ISO7041-Q1 Four-Channel Digital Isolator
Texas Instruments ISO7041/ISO7041-Q1 Four-Channel Digital Isolator is an ultra-low power, multichannel digital isolator that can isolate CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer separated by a double capacitive silicon dioxide (SiO2) insulation barrier. Innovative edge-based architecture combined with an ON-OFF keying modulation scheme allows these isolators to consume very low power while meeting the 3000VRMS isolation rating per UL1577. The per-channel dynamic current consumption of the device is under 120µA/Mbps, and the per-channel static current consumption is 4.2µA at 3.3V. This feature allows for using ISO7041 in both power and thermal-constrained system designs.
The device can operate as low as 2.25V and as high as 3.6V and is fully functional with different supply voltages on each side of the isolation barrier. The four-channel isolator comes in a 16-QSOP package with three forward-direction channels and one reverse-direction channel in a 16-QSOP package. The device has default output high and low options. If the input power or signal is lost, the default output is high for the ISO7041/ISO7041-Q1 device without the suffix F and low for the ISO7041F/ISO7041F-Q1 device with the F suffix. The Texas Instruments ISO7041F-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- Ultra-low power consumption
- 4.2µA per channel quiescent current (3.3V)
- 15µA per channel at 100kbps (3.3V)
- 116µA per channel at 1Mbps (3.3V)
- Robust isolation barrier
- >100-year projected lifetime
- 3000VRMS isolation rating
- ±100kV/µs typical CMTI
- 2.25V to 3.6V wide supply range
- –55°C to +125°C wide temperature range
- Small 16-QSOP package
- Up to 2Mbps signaling rate
- Default output high (ISO7041) and low (ISO7041F) options
- Robust Electromagnetic Compatibility (EMC)
- System-level ESD, EFT, and surge immunity
- Very low emissions
- Safety-related certifications (planned)
- UL 1577 component recognition program
- DIN V VDE V 0884-11
- CQC, TUV, and CSA certifications
- IECEx (IEC 60079-0 and IEC 60079-11) and ATEX (EN 60079-11)
Applications
- 4mA to 20mA loop-powered field transmitters
- Factory automation, process automation
- Low-power GPIO, UART, and SPI isolation
Datasheets
Functional Block Diagram
Related Development Tools
Texas Instruments DIGI-ISO-EVM Digital Isolator Evaluation Module
For TI single-channel, dual-channel, triple-channel, quad-channel, or six-channel digital isolators.
Texas Instruments ISO7041DBQEVM Isolator Evaluation Module (EVM)
Used to evaluate the ISO7041 low-power quad channel digital isolator in a 16-pin SSOP package.