Overview
The ADG438FBNZ, produced by Analog Devices Inc., is a high-performance, 8-channel, fault-protected analog multiplexer. This device is part of the ADG438F series, which includes the ADG438F and ADG439F models. The ADG438FBNZ is designed to switch one of eight inputs to a common output, controlled by 3-bit binary address lines (A0, A1, and A2). It features a robust fault protection mechanism, ensuring both device and signal source protection against overvoltage and power loss conditions.
Key Specifications
| Parameter | Typical Value | Maximum Value | Unit | Test Conditions/Comments |
|---|---|---|---|---|
| Analog Signal Range | VSS + 1.4 V to VDD - 1.4 V | VSS + 2.2 V to VDD - 2.2 V | V | Output open circuit and loaded, 1 mA respectively |
| 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 | |
| Switching Time (On-Time) | 250 ns | ns | ||
| Operating Temperature Range | −40°C to +125°C | °C | ||
| Dual Supply Voltage | ±15 V ± 10% | V |
Key Features
- Fault Protection: The ADG438FBNZ can withstand continuous overvoltage inputs from −40 V to +55 V and protects the device and signal sources during power loss or overvoltage conditions.
- Low On Resistance: Typical on resistance of 270 Ω, ensuring minimal signal degradation.
- Fast Switching Times: Maximum on-time of 250 ns, facilitating rapid signal switching.
- Low Charge Injection: Although specific to the ADG439F, the series generally features low charge injection, which is beneficial for maintaining signal integrity.
- Compact Package Options: Available in 16-lead PDIP and SOIC packages, offering flexibility in design.
Applications
- Data Acquisition Systems: Ideal for switching multiple analog signals in data acquisition systems.
- Industrial and Process Control Systems: Suitable for high reliability control systems in industrial environments.
- Avionics Test Equipment: Used in avionics for signal routing and switching.
- Signal Routing Between Systems: Effective for routing signals between different systems.
- Instrumentation and Test Equipment: Utilized in various test and measurement applications).
Q & A
- What is the ADG438FBNZ used for? The ADG438FBNZ is an 8-channel analog multiplexer used for switching one of eight inputs to a common output, controlled by 3-bit binary address lines.
- What kind of fault protection does the ADG438FBNZ offer? The ADG438FBNZ provides fault protection against overvoltage inputs up to −40 V to +55 V and protects the device and signal sources during power loss or overvoltage conditions.
- What is the typical on resistance of the ADG438FBNZ? The typical on resistance is 270 Ω.
- What is the maximum switching time of the ADG438FBNZ? The maximum on-time is 250 ns.
- What are the available package options for the ADG438FBNZ? It is available in 16-lead PDIP and SOIC packages.
- What is the operating temperature range of the ADG438FBNZ? The operating temperature range is −40°C to +125°C.
- Can the ADG438FBNZ be used in single-supply applications? Yes, in single-supply applications, the VSS pin can be connected to ground.
- How does the ADG438FBNZ protect the signal sources during fault conditions? During fault conditions with power supplies off, the multiplexer input (or output) appears as an open circuit, and only a few nanoamperes of leakage current flows, protecting the signal sources.
- What are some common applications of the ADG438FBNZ? Common applications include data acquisition systems, industrial and process control systems, avionics test equipment, and signal routing between systems.
- Is the ADG438FBNZ still in active production? Yes, the ADG438FBNZ is still in production, as indicated by the product lifecycle status.
