DG407BDW

Overview

The DG407BDW is a dual 8-channel high-performance 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, a transition time of 161 ns, and charge injection of 11 pC. It features TTL-compatible control inputs, an enable function for stacking, and break-before-make switching. The component is housed in a 28-pin widebody SOIC package and supports an operating temperature range of -40 °C to +85 °C.

Feature Summary

• Break-before-make switching action prevents momentary shorting of inputs during channel transitions.
• TTL-compatible digital control inputs ensure compatibility across the full specified operating temperature range.
• Enable (EN) function allows resetting all switches to the off state for stacking multiple devices.

Applications

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

Procurement Notes

Verify the specific suffix against the manufacturer's ordering information to confirm the package type and compliance status. The 'DW' designation indicates a 28-pin widebody SOIC package. Confirm RoHS compliance requirements as the datasheet covers both compliant and non-compliant variants. Ensure the selected part number matches the required lead finish and tape/reel specifications for your assembly process.

Selection Notes

Select this component when differential signal routing is required within a multiplexed architecture. The DG407B serves as a drop-in replacement for older series like the DG507A, offering lower on-resistance and faster transition times. Consider the 44V absolute maximum voltage rating for handling high-voltage signals. Verify that the 11 pC charge injection meets the precision requirements of your sample-and-hold circuits.

Part Context

The DG407B belongs to the DG406B/DG407B family of high-performance CMOS analog multiplexers. While the DG406B handles 16 single-ended channels, the DG407B is configured for 8 differential pairs. Both utilize a 44V silicon-gate CMOS process with an epitaxial layer to prevent latch-up. This family is designed to replace legacy devices while providing improved accuracy and reduced glitching.

Replacement Considerations

DG407BDN-E3

FAQ

How does the DG407B handle input signals exceeding the power supply rails?

Signals on the source pins (Sx) or drain pins (Dx) that exceed V+ or V- will be clamped by internal diodes. Designers must limit the forward diode current to the maximum current ratings specified in the absolute maximum ratings table.

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

The Enable (EN) function allows the user to reset the multiplexer to all switches off. This feature is particularly useful when stacking several devices to manage bus contention or isolate unused channels.

Does the DG407B support single-supply operation?

Yes, the device supports single-supply operation. It can operate with a single positive supply voltage, such as 12 V, in addition to dual supplies ranging from ±5 V to ±20 V.