DG407BDN

Overview

The DG407BDN is a dual 8-channel CMOS analog multiplexer manufactured by Vishay Siliconix. It selects one of eight differential inputs to a common differential output using a 3-bit binary address. The device operates with supply voltages ranging from ±5 V to ±20 V, or a single 12 V supply. Key electrical parameters include a maximum on-resistance of 74 Ω and a transition time of up to 161 ns across the full temperature range. It features low charge injection of 11 pC and an off-isolation of -86 dB at 1 MHz. The component is housed in a 28-pin PLCC package and supports operation between -40 °C and +85 °C.

Feature Summary

• Break-before-make switching action prevents momentary shorting of inputs during channel transitions.
• All control inputs, address lines, and enable functions are TTL compatible over the full specified operating temperature range.
• An epitaxial layer prevents latch-up associated with older CMOS technologies.
• Each channel blocks voltages up to the power supply rails when in the off state.

Applications

• High-speed data acquisition systems
• Audio signal switching and routing
• Automatic test equipment (ATE) systems
• Avionics applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm compliance status and termination finish. The '-DN' designation indicates a 28-pin PLCC package, while additional suffixes may denote tape-and-reel packaging or lead-free RoHS compliance. Confirm availability directly with authorized distributors as production status can change without notice.

Selection Notes

Select this component for applications requiring differential signal routing with high isolation. Ensure the design accommodates the 44 V absolute maximum voltage rating if utilizing extended supply ranges. Verify that the 3-bit address interface aligns with the system logic levels. Consider the 28-pin PLCC footprint for PCB layout constraints compared to wide-body SOIC alternatives.

Part Context

This part belongs to the DG406B/DG407B series of high-performance CMOS analog multiplexers. It serves as a drop-in replacement for legacy devices like the DG507A. The series utilizes a 44 V silicon-gate CMOS process to achieve extended voltage ratings and improved ruggedness compared to standard CMOS counterparts.

Replacement Considerations

DG407BDW-E3

FAQ

How does the DG407BDN handle input signals exceeding the supply rails?

Signals on the source pins exceeding V+ or V- will be clamped by internal diodes. Designers must limit the forward diode current to the maximum current ratings specified in the datasheet.

What is the purpose of the ENABLE (EN) pin?

The ENABLE function allows the user to reset the multiplexer to all switches off. This feature facilitates stacking several devices within a single system.

Is the DG407BDN suitable for single-supply operation?

Yes, the device supports single supply operation, typically at 12 V, in addition to dual supply configurations ranging from ±5 V to ±20 V.