ST712x 100Mbps 5kVrms Enhanced High-Speed Dual-Channel Digital Isolator
Specifications
Product details
Overview
The ST712x is an enhanced high-speed dual-channel digital isolator providing complete electrical isolation between input and output. The logic input and output buffers of each isolated channel are separated by a double-capacitive silicon dioxide (SiO₂) insulation barrier, and the two fully independent data channels encode the input data and recover it without distortion at the receiving end. Within the series, the ST7120 has both channels in the forward direction, while the ST7121 and ST7122 each have one forward and one reverse channel; if input-side power or signal is lost, L-suffix devices default to a low output and H-suffix devices to a high output. Featuring high insulation capability, the ST712x delivers high electromagnetic immunity and low emissions at low power consumption, preventing noise and surges on data buses or other circuits from reaching the local ground and damaging sensitive circuits, while its high CMTI ensures correct digital signal transmission. The devices are offered in 8-pin narrow-body SOP8 (-A) and 8-pin wide-body SOW8 (-B) packages over a -40~+125℃ operating range.
Features
- Signal transmission rate: 100Mbps
- Common-mode transient immunity (CMTI): ±100kV/μs (typical)
- Up to 5kVrms isolation withstand voltage, up to 13kV surge immunity
- Isolation barrier lifetime exceeding 50 years
- Wide supply voltage range: 2.5V to 5.5V, with 2.5V~5.5V level shifting
- 11ns typical propagation delay (5V supply), 3ns pulse-width distortion
- Default output high (H) and low (L) options
- Operating temperature range: -40℃ to +125℃
- 8-pin narrow SOP8 (-A) / 8-pin wide SOW8 (-B) packages
Typical Applications
- Industrial automation
- Motor control
- Solar inverters
- Isolated power supplies
- Medical equipment
