DSA1125

DSA1125 is a high-performance analog switch designed by Microchip Technology, optimized for precision signal routing in demanding applications. It features low on-resistance (typically 0.3 Ω) and ultra-low charge injection (< 5 pC), making it ideal for high-speed data acquisition systems where signal integrity is critical. The device supports single-supply operation from 2.7 V to 5.5 V, enabling compatibility with a wide range of digital and analog power domains. This dual-channel, single-pole double-throw (SPDT) switch offers excellent channel-to-channel isolation (> 90 dB at 1 MHz) and low crosstalk, ensuring minimal interference between signals. Its fast switching speed—less than 10 ns propagation delay—allows rapid signal path changes without introducing significant timing errors. The DSA1125 also includes built-in protection features such as ESD immunity up to ±8 kV HBM and over-voltage protection, enhancing reliability in harsh industrial environments. The device operates with CMOS-compatible logic inputs, supporting both 3.3 V and 5 V control voltages, which simplifies integration into existing system architectures. Power consumption is minimized through a shutdown mode that reduces quiescent current to less than 1 μA, making it suitable for battery-powered or energy-sensitive applications. Additionally, the DSA1125 is available in a compact 8-pin SOIC package, offering a space-efficient solution for densely populated PCB designs. Applications include medical instrumentation, test and measurement equipment, data acquisition systems, and industrial automation where precise analog signal routing, low distortion, and high reliability are essential. It is particularly well-suited for multiplexing sensor signals in multi-channel systems, switching between reference voltages, and controlling analog front-end paths in ADCs and DACs. Its robust performance under varying temperature conditions—from -40°C to +85°C—makes it reliable across diverse operating environments.