Overview
The ADG509FBRN, produced by Analog Devices Inc., is a CMOS analog multiplexer that offers robust and reliable signal switching capabilities. This device is part of the ADG509F series, which includes four differential channels. It is designed to switch one of four differential inputs to a common differential output, controlled by 2-bit binary address lines A0 and A1, along with an enable input (EN) to activate or deactivate the device.
The ADG509FBRN is notable for its fault protection features, allowing it to withstand continuous overvoltage inputs from -40 V to +55 V, even when power supplies are absent. This ensures both device and signal source protection during overvoltage or power loss conditions.
Key Specifications
| Parameter | Typical | Maximum | Unit |
|---|---|---|---|
| Number of Channels | 4 differential | ||
| On-Resistance (RON) | 390 | 390 | Ω |
| Transition Time (tTRANSITION) | 200 | 400 | ns |
| Enable Time (tON EN) | 200 | 400 | ns |
| Disable Time (tOFF EN) | 200 | 400 | ns |
| Off Isolation | 68 | dB | |
| Source Leakage Current (IS Off) | 0.02 | 1 | nA |
| Output Leakage Current (ID Off) | 0.04 | 1 | nA |
| Digital Input High Voltage (VINH) | 2.4 | V | |
| Digital Input Low Voltage (VINL) | 0.8 | V | |
| Digital Input Current (IINL or IINH) | 1 | μA |
Key Features
- Fault Protection: Can withstand continuous overvoltage inputs from -40 V to +55 V, even when power supplies are off.
- Low On-Resistance (RON): Maximum of 390 Ω, ensuring minimal signal degradation.
- Fast Switching Times: Transition times as low as 200 ns, enabling quick and efficient signal switching.
- Break-Before-Make Switching: Prevents momentary shorting of input signals.
- Trench Isolation: Eliminates latch-up by separating p and n-channel MOSFETs with a dielectric trench.
- Low Leakage Current: Minimal leakage current during off-state, protecting the multiplexer and succeeding circuitry.
Applications
- Industrial Automation: Used in control systems and signal processing where robust and reliable switching is critical.
- Medical Devices: Suitable for medical equipment requiring precise and fault-tolerant signal switching.
- Aerospace and Defense: Applied in systems that demand high reliability and fault protection against overvoltages.
- Test and Measurement Equipment: Ideal for multiplexing signals in test and measurement applications where signal integrity is paramount.
Q & A
- What is the ADG509FBRN used for?
The ADG509FBRN is a CMOS analog multiplexer used to switch one of four differential inputs to a common differential output.
- How many channels does the ADG509FBRN have?
The ADG509FBRN has four differential channels.
- What is the maximum on-resistance (RON) of the ADG509FBRN?
The maximum on-resistance (RON) is 390 Ω.
- What is the transition time (tTRANSITION) of the ADG509FBRN?
The transition time (tTRANSITION) is typically 200 ns and can be up to 400 ns maximum.
- How does the ADG509FBRN protect against overvoltages?
The ADG509FBRN can withstand continuous overvoltage inputs from -40 V to +55 V, even when power supplies are off, by using a series n-channel, p-channel, n-channel MOSFET structure.
- What is the purpose of the enable input (EN) on the ADG509FBRN?
The enable input (EN) is used to activate or deactivate the device. When low, the device is disabled and all switches are off.
- What is the significance of break-before-make switching in the ADG509FBRN?
Break-before-make switching prevents momentary shorting of input signals, protecting the circuitry from potential damage.
- How does trench isolation benefit the ADG509FBRN?
Trench isolation eliminates latch-up by separating p and n-channel MOSFETs with a dielectric trench.
- What are some typical applications of the ADG509FBRN?
The ADG509FBRN is used in industrial automation, medical devices, aerospace and defense, and test and measurement equipment.
- What is the maximum digital input high voltage (VINH) for the ADG509FBRN?
The maximum digital input high voltage (VINH) is 2.4 V.
- What is the typical off isolation of the ADG509FBRN?
The typical off isolation is 68 dB.
