DG412CJ+
DG412CJ+ - 4-Channel SPST Analog Switch | Maxim Integrated
The Maxim Integrated DG412CJ+ is a 4-channel, independently controlled SPST analog switch IC with a 45 Ω on-resistance specification, housed in a 16-pin PDIP package. The device is designed for signal routing in test, measurement, communication, and industrial control systems where four separate analog paths must be selected with low distortion and controlled resistance.
An analog switch is an interface IC that connects or disconnects a signal path under digital control. The DG412CJ+ belongs to the analog switch family, which sits within interface ICs and broader semiconductor signal-routing systems. Its four SPST channels provide simple on/off selection rather than multiplexing several inputs onto one output. This makes it suitable for bypassing, routing, isolation, and test-fixture applications where the signal must preserve amplitude and waveform integrity.
The verified product information identifies the DG412CJ+ as an improved, quad, SPST analog switch. Maxim describes the DG411, DG412, and DG413 family as featuring low on-resistance matching between switches, with a maximum matching value of 3 Ω, and guaranteed on-resistance flatness over the signal range, with a maximum flatness difference of 4 Ω. These characteristics help reduce channel-to-channel variation and signal amplitude errors in precision analog paths. The manufacturer product page also lists a 1ku list-price starting point of $3.68.
The CJ+ ordering code uses the manufacturer’s 16-pin PDIP package, making it appropriate for through-hole prototyping, educational platforms, and legacy or industrial assemblies where a socketed DIP footprint is preferred. The four control inputs are intended for digital control, while the switched terminals carry analog signals. The design must still be checked against the complete datasheet for absolute maximum ratings, switch configuration, control logic, charge injection, off leakage, and operating limits.
Typical uses include selecting one of several sensor outputs, isolating instrumentation inputs, controlling analog test paths, routing audio or communication signals, and implementing sample-and-hold or measurement front ends. Because the device is a physical switch rather than an active amplifier, system performance depends on source impedance, signal amplitude, control timing, parasitic capacitance, and PCB leakage. Use a ground plane, short analog traces, and an appropriate bypass strategy when integrating it into a mixed-signal board.
The DG412CJ+ is a sensible choice when four independent SPST paths, a DIP package, and low matched on-resistance are required. For a new compact design, a surface-mount equivalent may simplify assembly; for a different multiplexing architecture, a mux or demux device should be considered instead. This page combines the verified manufacturer and distributor information with practical selection, application, and design guidance.
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