Overview
The ADG439FBRWZ is a high-performance, 4-channel, fault-protected analog multiplexer produced by Analog Devices Inc. This device is part of the ADG439F series, which includes the ADG439FBRWZ model packaged in a 16-lead SOIC wide format. The ADG439F switches one of four differential inputs to a common differential output, controlled by 2-bit binary address lines, A0 and A1. An enable input (EN) allows the device to be enabled or disabled, with all channels switched off when disabled. The multiplexer is designed with a series n-channel, p-channel, and n-channel MOSFET structure, providing robust fault protection against overvoltage and power loss conditions.
Key Specifications
| Parameter | Typical Value | Maximum Value | Unit | Test Conditions |
|---|---|---|---|---|
| Analog Signal Range | VSS + 1.4 to VDD - 1.4 | VSS + 2.2 to VDD - 2.2 | V | Output loaded, 1 mA |
| On-Resistance (RON) | 270 Ω | 450 Ω | Ω | −10 V ≤ VS ≤ +10 V, IS = 1 mA |
| On-Resistance Flatness (RFLAT) | 9 % | 10 % | % | −10 V ≤ VS ≤ +10 V, IS = 1 mA |
| On-Resistance Drift | 0.6 %/°C | %/°C | VS = 0 V, IS = 1 mA | |
| Turn-On Time (tON) | 180 ns | 345 ns | ns | RL = 1 kΩ, CL = 35 pF, VS = 5 V |
| Turn-Off Time (tOFF) | 100 ns | 173 ns | ns | RL = 1 kΩ, CL = 35 pF, VS = 5 V |
| Settling Time (tSETT) | 1 μs (0.1%) | 2.5 μs (0.01%) | μs | RL = 1 kΩ, CL = 35 pF, VS = 5 V |
| Charge Injection | 15 pC | pC | VS = 0 V, RS = 0 Ω, CL = 1 nF | |
| Off Isolation | 93 dB | dB | RL = 1 kΩ, CL = 15 pF, f = 100 kHz, VS = 7 V rms |
Key Features
- Fault Protection: The ADG439F can withstand continuous overvoltage inputs from −40 V to +55 V and protects the device and signal sources during power loss conditions.
- Low On-Resistance (RON): Typical RON of 270 Ω, ensuring minimal signal attenuation.
- Fast Switching Times: Turn-on time of 180 ns and turn-off time of 100 ns, making it suitable for high-speed applications.
- Low Charge Injection: Minimal charge injection of 15 pC, reducing transients during switching.
- Wide Operating Temperature Range: Operates from −40°C to 125°C, making it versatile for various environments.
- Break-Before-Make Switching: Prevents channel shorting during switching, ensuring reliable operation.
Applications
- Data Acquisition Systems: Ideal for routing and switching signals in data acquisition systems.
- Sensor Interfacing: Suitable for interfacing with sensors due to its fault protection and low on-resistance features.
- Signal Routing and Switching: Used in various signal routing and switching applications requiring high reliability and fast switching times.
- Instrumentation and Test Equipment: Employed in instrumentation and test equipment due to its robust performance and fault protection capabilities.
- Industrial and Process Control Systems: Applicable in industrial and process control systems where reliability and fault protection are critical.
Q & A
- What is the primary function of the ADG439FBRWZ?
The ADG439FBRWZ is a 4-channel, fault-protected analog multiplexer that switches one of four differential inputs to a common differential output based on 2-bit binary address lines.
- What is the typical on-resistance (RON) of the ADG439FBRWZ?
The typical on-resistance (RON) is 270 Ω.
- What are the turn-on and turn-off times for the ADG439FBRWZ?
The turn-on time (tON) is typically 180 ns, and the turn-off time (tOFF) is typically 100 ns.
- How does the ADG439FBRWZ protect against fault conditions?
The device can withstand continuous overvoltage inputs from −40 V to +55 V and appears as an open circuit with minimal leakage current during power loss conditions.
- What is the operating temperature range of the ADG439FBRWZ?
The operating temperature range is from −40°C to 125°C.
- What types of applications is the ADG439FBRWZ suitable for?
It is suitable for data acquisition systems, sensor interfacing, signal routing and switching, instrumentation and test equipment, and industrial and process control systems.
- What is the significance of the break-before-make switching feature?
This feature prevents channel shorting during switching, ensuring reliable operation.
- How does the ADG439FBRWZ minimize charge injection?
The device has a low charge injection of 15 pC, reducing transients during switching.
- What is the off-isolation performance of the ADG439FBRWZ?
The off-isolation is typically 93 dB at 100 kHz.
- Is the ADG439FBRWZ still in active production?
No, the ADG439FBRWZ is an obsolete product and is no longer in active production. However, equivalent or alternative models may be available.
