Overview
The ISO8200AQTR, produced by STMicroelectronics, is a galvanic isolated octal high-side smart power solid-state relay. This device features a very low supply current and is designed to drive any kind of load with one side connected to ground. It includes two independent galvanic isolated voltage domains for the Process and Control Logic stages, respectively. The IC is equipped with an 8-bit Output Status Register and an 8-bit Fault Register, enabling precise control and monitoring of the output channels. The device also incorporates various protection functions, including active channel current limitation, thermal shutdown, loss of ground protection, and VCC and VDD undervoltage lockouts (UVLOs) with hysteresis.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| VCC (Process Stage supply voltage) | -0.3 | - | 45 | V |
| VDD (Control Logic Stage supply voltage) | -0.3 | - | 6.5 | V |
| IOUT (Channel Output Current, continuous) | - | - | 0.7 | A |
| RDS(on) (per channel) | - | 0.120 | - | Ω |
| TJ (Junction operating temperature) | - | - | 150 | °C |
| TSTG (Storage temperature) | -55 | - | 150 | °C |
| fCLK (SPI clock frequency) | - | - | 20 | MHz |
Key Features
- Galvanic isolation between the Process and Control Logic stages.
- 8-channel high-side driver with SPI interface for communication with an external microcontroller.
- Active channel current limitation and thermal shutdown for each channel.
- Loss of ground protection and VCC and VDD undervoltage lockouts (UVLOs) with hysteresis.
- Watchdog and VCC Power GOOD diagnostic pin.
- Open drain FAULT and PGOOD pins for fault indication.
- Daisy chaining capability for multiple device connections.
- Compliance with UL1577 and UL508 standards.
Applications
- Programmable logic control.
- Industrial PC peripheral input/output.
- Numerical control machines.
- Drivers for all types of loads (resistive, capacitive, inductive).
Q & A
- What is the operating voltage range for the Process Stage of the ISO8200AQTR?
The operating voltage range for the Process Stage (VCC) is from 10.5 V to 45 V.
- What is the maximum continuous output current per channel?
The maximum continuous output current per channel is 0.7 A.
- What type of protection does the ISO8200AQTR have against overheating?
The device has thermal shutdown protection, which turns off the output when the junction temperature exceeds a certain threshold and turns it back on when the temperature falls below the reset threshold.
- How does the ISO8200AQTR communicate with an external microcontroller?
The device communicates through an integrated SPI interface.
- What is the purpose of the FAULT and PGOOD pins?
The FAULT pin indicates if any channel is in thermal fault, and the PGOOD pin indicates if the supply voltage of the Process Stage is lower than the internal threshold.
- Can the ISO8200AQTR be daisy-chained?
- What are the storage temperature limits for the ISO8200AQTR?
The storage temperature range is from -55°C to 150°C.
- What certifications does the ISO8200AQTR comply with?
The device complies with UL1577 and UL508 standards.
- What is the typical on-resistance (RDS(on)) per channel?
The typical on-resistance (RDS(on)) per channel is 0.120 Ω.
- What is the maximum SPI clock frequency?
The maximum SPI clock frequency is 20 MHz.
