DG181AP

Analog Switches, Multiplexers, Demultiplexers Overview

The DG181AP is a precision dual single-pole, single-throw (SPST) analog switch manufactured by Vishay Siliconix. It utilizes four n-channel JFET transistors and a TTL-compatible bipolar driver to provide accurate switching of video and audio signals with constant on-resistance over the entire analog range. The device operates within a temperature range of -55°C to +125°C and features low leakage current and high isolation. Key electrical parameters include a maximum drain-source on-resistance of 30 Ohms at room temperature and up to 75 Ohms across the full temperature range. The switches can block up to 20 V peak-to-peak in the off state.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Provides constant on-resistance across the entire analog signal range for high precision applications
• Features low leakage current and high feedthrough isolation exceeding -60 dB at 10 MHz
• Includes fault protection capabilities allowing the switches to block up to 20 V peak-to-peak when off

Analog Switches, Multiplexers, Demultiplexers Applications

• Audio switching circuits requiring flat JFET on-resistance
• Video signal routing and switching systems
• Data acquisition systems demanding high accuracy
• Sample-and-hold circuits
• Guidance and control systems in aerospace environments

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'A' confirms the extended operating temperature range of -55°C to +125°C as documented in the datasheet. Confirm package type compatibility, as the DG181 series includes metal can and flat pack options. Check for military specifications such as JM38510 or JAN38510 if radiation hardness or specific reliability standards are required for the application.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select the DG181AP when a higher on-resistance compared to the DG180 is acceptable but lower than the DG182. Ensure the design accommodates the specified supply voltage ranges, typically ±15 V for optimal performance. Verify that the logic input levels align with standard TTL requirements (0.8 V to 2.0 V). Consider the power dissipation limits based on the chosen package style and ambient temperature conditions.

Analog Switches, Multiplexers, Demultiplexers Part Context

The DG181AP belongs to the DG180/181/182 family of high-speed drivers with dual SPST JFET switches. This series is designed for applications requiring precise analog signal switching. The primary distinction between the models lies in their on-resistance values: the DG180 offers 10 Ohms, the DG181 provides 30 Ohms, and the DG182 delivers 75 Ohms. All variants share similar architectural features including low distortion and high bandwidth capability.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Public confirmed substitute part numbers include DG180AP and DG182AP from the same manufacturer series.