**ADG512BRZ: A Comprehensive Guide to the 4-Channel Serially Controlled Analog Multiplexer**
In the realm of electronic design, efficiently routing analog signals is a fundamental challenge. The **ADG512BRZ from Analog Devices** stands as a robust solution, offering designers a high-performance method for signal management. This integrated circuit is a **monolithic, serially controlled, 4-channel analog multiplexer** designed to switch one of four analog inputs to a common output. Its serial interface and compact package make it an ideal choice for space-constrained and digitally-intensive applications, such as data acquisition systems, automated test equipment (ATE), and programmable logic controllers (PLCs).
The core functionality of the ADG512BRZ is its ability to act as a digitally controlled switch. The device features four independent analog input channels (S1-S4), a single common output (D), and two digital address lines (A0 and A1). The desired channel is selected by applying the appropriate 2-bit binary address via these lines. A significant advantage of the ADG512BRZ is its **serial-to-parallel interface with latch capability**, which is controlled through a serial data input (SDI), clock (CLK), and chip select (CS) pin. This serial interface drastically reduces the number of microcontroller GPIO pins required for control, simplifying board layout and freeing up valuable digital resources for other functions.
A key strength of this multiplexer lies in its analog performance. It is designed to handle **both analog and digital signals** across a wide supply range, typically from ±5V to ±20V, or a single supply from +10V to +36V. This flexibility allows it to accommodate a broad spectrum of signal amplitudes. The device boasts low on-resistance (typically 80Ω), which is very flat across the signal range, ensuring minimal distortion of the switched analog signal. Furthermore, it features **break-before-make switching action**, a critical characteristic that prevents two channels from being shorted together momentarily during transition, thus protecting the integrity of the source signals.
From a design integration perspective, the ADG512BRZ is housed in a 16-lead SOIC package, offering a compact footprint. The serial control protocol is straightforward: when CS is held low, data on the SDI line is shifted into an internal register on the rising edge of CLK. The state of the latch is updated upon the rising edge of CS, changing the active channel. This simple timing makes it easy to interface with virtually any modern microcontroller or DSP.
**ICGOO**DFIND summarizes: The ADG512BRZ is a highly integrated and efficient solution for serial-controlled analog signal routing, **excelling in systems where digital control and analog signal fidelity are paramount**. Its combination of a serial interface, wide voltage range, and robust analog performance makes it a superior choice for modern, digitally-managed analog systems.
**Keywords:** Analog Multiplexer, Serial Interface, Signal Switching, Low On-Resistance, Break-Before-Make.
