Overview
The SI8902D-A01-GS, produced by Skyworks Solutions Inc., is part of the Si8900/1/2 series of isolated monitoring Analog-to-Digital Converters (ADCs). These devices are designed to serve as linear signal galvanic isolators, level shifters, and ground loop eliminators. They integrate a 10-bit Successive Approximation Register (SAR) ADC subsystem, a supervisory state machine, and an isolated serial port in a single package. The SI8902D-A01-GS specifically features a 2 MHz SPI port for communication. These ADCs are built using proprietary CMOS isolation technology and are available with either 2.5 kV or 5 kV isolation ratings, ensuring robust performance in noisy and high-voltage environments.
Key Specifications
| Parameter | Symbol | Condition | Min | Max | Unit | |
|---|---|---|---|---|---|---|
| Input Side Supply Voltage | VDDA | With respect to GNDA | 2.7 | - | 3.6 | V |
| Input Side Supply Current (Active) | IDDA | VDDA = 3.3 V, Si890x active | - | 10 | 13.3 | mA |
| Input Side Supply Current (Idle) | IDDA | VDDA = 3.3 V, Si890x idle | - | 8.6 | - | mA |
| ADC Resolution | - | - | - | 10-bit | - | - |
| ADC Conversion Time | - | - | - | 2.5 µs | - | - |
| Serial Port Type | - | - | - | SPI | - | - |
| SPI Port Speed | - | - | - | 2 MHz | - | - |
| Isolation Voltage | - | - | - | Up to 5 kV | - | - |
| Operating Temperature Range | - | - | -40 | - | +85 | °C |
Key Features
- 10-bit SAR ADC with three-channel analog input multiplexer and selectable gain amplifier (1x or 0.5x gain).
- Isolated serial port: SPI port operating at up to 2 MHz (SI8902D-A01-GS).
- High common-mode transient immunity: 45 kV/µs (typical).
- Wide operating temperature range: –40 to +85 °C.
- Safety certifications: UL, CSA, VDE, IEC 60950, 62368, 60601.
- Long isolation life: >60 years at rated working voltage.
- Available in 16-pin SOIC wide-body packages.
Applications
The SI8902D-A01-GS is suitable for various applications requiring isolated monitoring and data conversion, including:
- Power-delivery systems
- Solar inverters
- Industrial automation and control systems
- Medical devices requiring isolation
- High-voltage and noisy environments where galvanic isolation is necessary
Q & A
- What is the primary function of the SI8902D-A01-GS?
The primary function is to convert analog input signals into digital format and transmit the data through an isolated SPI port.
- What types of serial ports are available in the Si8900/1/2 series?
The series includes UART (Si8900), I2C/SMbus (Si8901), and SPI (Si8902) ports.
- What is the maximum speed of the SPI port in the SI8902D-A01-GS?
The SPI port operates at up to 2 MHz.
- What is the ADC resolution of the SI8902D-A01-GS?
The ADC resolution is 10 bits.
- What is the typical conversion time of the ADC?
The typical conversion time is 2.5 µs.
- What is the isolation voltage rating of the SI8902D-A01-GS?
The isolation voltage rating is up to 5 kV.
- What are the safety certifications for the SI8902D-A01-GS?
The device is certified by UL, CSA, VDE, and complies with IEC 60950, 62368, 60601 standards.
- What is the operating temperature range of the SI8902D-A01-GS?
The operating temperature range is –40 to +85 °C.
- In what package type is the SI8902D-A01-GS available?
The device is available in a 16-pin SOIC wide-body package.
- What is the common-mode transient immunity of the SI8902D-A01-GS?
The common-mode transient immunity is typically 45 kV/µs.
