**The ADG426BRSZ: A High-Performance 16-Channel Analog Multiplexer for Precision Data Acquisition Systems**
In the realm of precision data acquisition (DAQ), the integrity of the analog signal path is paramount. The selection of components that switch, route, and condition signals directly impacts system accuracy, speed, and reliability. At the heart of many such systems lies the analog multiplexer (mux), a critical component responsible for sequentially connecting multiple analog inputs to a single output for processing by a high-resolution analog-to-digital converter (ADC). Among the elite solutions in this category, **the ADG426BRSZ from Analog Devices stands out as a premier 16-channel multiplexer engineered for high-performance applications.**
The ADG426BRSZ is designed to address the most demanding challenges in precision measurement. Fabricated on an advanced iCMOS (industrial CMOS) process, this multiplexer delivers a unique combination of high voltage capability, low power consumption, and exceptional switching characteristics. **Its robust architecture ensures minimal signal degradation, making it an ideal front-end for high-resolution ADC systems** in medical instrumentation, automated test equipment (ATE), industrial process control, and aerospace data systems.
A key performance differentiator of the ADG426BRSZ is its **ultra-low on-resistance of typically 25Ω**. This low RON is critically important as it minimizes voltage drop and power dissipation across the switch, thereby preserving signal amplitude and enhancing measurement accuracy. Furthermore, the on-resistance flatness is exceptionally low, ensuring consistent performance across the entire analog input range, which is vital for maintaining linearity in precision systems.
Another defining feature is its **excellent charge injection performance of just 5 pC typical**. Charge injection is a phenomenon where a small amount of charge is transferred from the switch's control circuitry to the analog signal path during switching transitions. This can introduce glitches and errors, especially when driving high-impedance inputs of precision amplifiers or ADCs. The ADG426BRSZ's minimal charge injection drastically reduces these transient errors, leading to faster settling times and more accurate readings after each channel switch.
The device also boasts **very low leakage currents, typically 100 pA at 25°C**. In systems measuring very small currents or holding charge on sample-and-hold capacitors, even nanoamps of leakage can cause significant drift and error over time. The picoamp-level leakage of the ADG426BRSZ ensures that signals remain uncontaminated, supporting the measurement of low-level signals with high fidelity.
Versatility is a hallmark of this multiplexer. It offers **break-before-make switching action**, preventing momentary shorting between adjacent input channels during transition, which could otherwise damage sources or corrupt measurements. The ADG426BRSZ operates from a wide dual-supply range (±5 V to ±20 V) or a single supply (+10 V to +30 V), providing designers with the flexibility to interface with a wide array of signal levels. Its TTL/CMOS-compatible digital inputs simplify interfacing with modern microcontrollers and FPGAs.
In conclusion, for engineers designing the next generation of precision data acquisition systems, the selection of a multiplexer is a decision that resonates throughout the entire signal chain. **The ADG426BRSZ provides a compelling solution with its blend of low on-resistance, minimal charge injection, and low leakage currents**, ensuring that signal integrity is maintained from sensor to digitizer. It empowers designers to achieve higher accuracy, greater reliability, and superior performance in their most critical applications.
**ICGOODFIND:** The ADG426BRSZ is a high-performance analog multiplexer that is **essential for maintaining signal integrity in precision 16-channel data acquisition systems**, offering an optimal balance of low RON, low charge injection, and high reliability.
**Keywords:** Analog Multiplexer, Precision Data Acquisition, Low On-Resistance, Charge Injection, Signal Integrity.
