Isolated power and data interface for low-power applications reference design
TIDA-010018
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- Isolated power and data interface for low-power applications reference design
(PDF 2267 KB)
30 Jan 2019
Description
This reference design provides power and data isolation for low and ultra-low power applications. Generating isolated and non-isolated power rails with a high efficiency and containing a power efficient isolated data interface for three forward- plus one reverse-direction channels. Targeted applications are isolated loop powered 4- to 20-mA transmitters. This design can be adapted to other applications requiring highly-efficient power conversion and isolated data transmission while being powered from sources with a limited current capability.
Features
- Power input 5 VDC, source needs to be current limited to < 30 mA
- Ultra-low power, isolated data interface
- 5, 16, 130 μA per channel at 10, 100, 1000 kbps
- 3 forward-channels, 1 reverse-channel
- Isolated 10-mA DC/DC Converter
- Efficiency up to 86.5%
- 3.3-V, 10-mA buck converter on non-isolated side
- Efficiency up to 93%, VOUT ripple < 15 mVpp
- 3.3-V, 10-mA buck converter on isolated side
- Efficiency up to 92%, VOUT ripple < 20 mVpp
- 3.0-V, 10-mA LDOs
- IQ = 16 μA @ Iout = 1 mA
- PSRR > 36 dB at ≤ 200 kHz
See the Important Notice and Disclaimer covering reference designs and other TI resources.
