Overview
The ADG7421FBCPZ-RL7, produced by Analog Devices Inc., is a dual single-pole single-throw (SPST) analog switch designed for low voltage fault protection and detection. This component is particularly suited for applications requiring overvoltage protection for small signals, such as those from resistance temperature devices (RTDs). It offers robust protection against overvoltage conditions and provides reliable switching performance across a wide range of operating temperatures.
Key Specifications
| Parameter | Typical Value | Maximum Value | Unit | Test Conditions/Comments |
|---|---|---|---|---|
| On Resistance (RON) | 12 Ω | 23 Ω | Ω | VS = −2.15 V to +1.9 V, IS = 10 mA |
| Flat On Resistance (RFLAT) | 0.005 Ω | 0.1 Ω | Ω | VS = −2.15 V to +1.9 V, IS = 10 mA |
| Match On Resistance (RMATCH) | 0.01 Ω | 0.7 Ω | Ω | VS = −2.15 V to +1.9 V, IS = 10 mA |
| Turn-On Time (tON) | 4.7 µs | 7.3 µs | µs | RL = 300 Ω, CL = 35 pF, VS = 1.5 V |
| Turn-Off Time (tOFF) | 250 ns | 400 ns | ns | RL = 300 Ω, CL = 35 pF, VS = 1.5 V |
| Supply Voltage (VDD/VSS) | ±2.25 V to ±2.75 V | V | Dual supply voltage range | |
| Operating Temperature | °C | −40°C to +125°C |
Key Features
- Overvoltage Fault Protection: Up to ±60 V on S1 and S2 pins, ensuring protection against high voltage spikes.
- Power-Off Protection: Maintains protection up to ±60 V on S1 and S2 pins even when the device is powered off.
- Overvoltage Detection: Detects overvoltage conditions on S1 and S2 pins, providing a known state output without digital inputs present.
- Low On Resistance: Typical on resistance of 12 Ω, with ultra-flat on resistance of 0.005 Ω.
- Low Fault Detection Threshold Voltage: Typical threshold voltage of 0.1 V.
- Wide Operating Temperature Range: Operates from −40°C to +125°C.
Applications
- Resistance Temperature Device (RTD) Inputs: Ideal for protecting RTD inputs from overvoltage conditions.
- Industrial Automation: Suitable for use in industrial automation systems where robust signal protection is necessary.
- Medical Devices: Can be used in medical devices to ensure reliable and safe signal switching.
- Aerospace and Defense: Applicable in aerospace and defense systems requiring high reliability and fault tolerance.
Q & A
- What is the primary function of the ADG7421FBCPZ-RL7?
The primary function is to provide overvoltage fault protection and detection for small signals, such as those from RTDs.
- What is the maximum overvoltage protection provided by this component?
The component provides overvoltage protection up to ±60 V on S1 and S2 pins.
- What is the typical on resistance of the ADG7421FBCPZ-RL7?
The typical on resistance is 12 Ω, with an ultra-flat on resistance of 0.005 Ω.
- What is the operating temperature range of this device?
The device operates from −40°C to +125°C.
- Does the ADG7421FBCPZ-RL7 provide power-off protection?
- What is the fault detection threshold voltage of this component?
The typical fault detection threshold voltage is 0.1 V.
- Can the ADG7421FBCPZ-RL7 be used in medical devices?
- What is the turn-on time of the ADG7421FBCPZ-RL7?
The turn-on time is typically 4.7 µs, with a maximum of 7.3 µs.
- What is the turn-off time of the ADG7421FBCPZ-RL7?
The turn-off time is typically 250 ns, with a maximum of 400 ns.
- What is the supply voltage range for the ADG7421FBCPZ-RL7?
The supply voltage range is ±2.25 V to ±2.75 V.
