ADUM1250ARZ Detailed explanation of pin function specifications and circuit principle instructions（277 ）

The ADUM1250ARZ is a part manufactured by Analog Devices, specifically part of their iCoupler family, which offers digital isolators based on microtransformer technology. The device is a dual-channel digital isolator designed to isolate high-speed digital signals in various industrial and consumer applications.

For your request, I will detail the pinout functions for the ADUM1250ARZ, including the encapsulation and the corresponding pin functions.

Pinout Details and Pin Function Specifications:

Package Type: 8-pin SOIC (Small Outline Integrated Circuit), commonly referred to as SO-8. Pin Count: 8 pins Package Dimensions: 4.9mm x 3.9mm x 1.75mm. Pin Functions (Complete for 8-Pin SOIC Package): Pin Number Pin Name Function Description 1 VCC1 Power supply for the primary side of the isolator. Connect to VCC (3.3V or 5V). 2 GND1 Ground for the primary side of the isolator. Connect to ground. 3 IN1A Input signal A (primary side). Can accept logic signals (low or high). 4 IN1B Input signal B (primary side). Can accept logic signals (low or high). 5 OUT1A Output signal A (secondary side). Corresponding signal from IN1A after isolation. 6 OUT1B Output signal B (secondary side). Corresponding signal from IN1B after isolation. 7 GND2 Ground for the secondary side of the isolator. Connect to ground. 8 VCC2 Power supply for the secondary side of the isolator. Connect to VCC (3.3V or 5V).

Explanation of Pin Functions:

VCC1 (Pin 1): This pin is used to supply power to the primary side of the digital isolator. The voltage on this pin should typically be 3.3V or 5V depending on the system’s requirements. GND1 (Pin 2): This is the ground pin for the primary side. It should be connected to the ground of the system. IN1A (Pin 3): This is the primary input pin for signal A. It can accept high or low logic signals, which are then isolated by the ADUM1250ARZ. IN1B (Pin 4): This is the primary input pin for signal B. It functions the same way as IN1A but for a second input channel. OUT1A (Pin 5): This is the isolated output signal corresponding to IN1A. It will mirror the logic state of IN1A on the secondary side, but electrically isolated. OUT1B (Pin 6): This is the isolated output signal corresponding to IN1B. Similar to OUT1A, it isolates the signal from IN1B. GND2 (Pin 7): Ground for the secondary side of the isolator. It must be tied to the secondary ground. VCC2 (Pin 8): This is the power supply pin for the secondary side. It must be connected to the secondary system’s voltage supply (either 3.3V or 5V).

Circuit Principle:

The ADUM1250ARZ is based on microtransformer technology which allows it to isolate two sections of a system while enabling high-speed digital signal transmission. The device supports logic-level signal isolation and provides protection from voltage spikes and noise, which is critical in industrial control systems, medical devices, and communication systems.

Frequently Asked Questions (FAQs) about ADUM1250ARZ: Q: What is the maximum operating voltage for the ADUM1250ARZ? A: The maximum operating voltage is 5.5V on both the primary and secondary sides (VCC1 and VCC2). Q: Can I use a 3.3V supply for both VCC1 and VCC2? A: Yes, the ADUM1250ARZ supports both 3.3V and 5V supply voltages for both VCC1 and VCC2. Q: What is the typical isolation voltage of the ADUM1250ARZ? A: The ADUM1250ARZ provides galvanic isolation with a typical isolation voltage of 2500V RMS. Q: How fast can the ADUM1250ARZ operate? A: The ADUM1250ARZ supports high-speed operation with a maximum data rate of 25 Mbps. Q: Can the ADUM1250ARZ be used in automotive applications? A: Yes, the ADUM1250ARZ can be used in automotive applications as it operates within industrial-grade voltage ranges and has robust noise immunity. Q: What is the temperature range of the ADUM1250ARZ? A: The ADUM1250ARZ operates in a temperature range of -40°C to +125°C, suitable for industrial environments. Q: Is there any special consideration when handling the ADUM1250ARZ? A: The device should be handled according to standard ESD precautions to prevent damage due to electrostatic discharge. Q: How many channels of isolation does the ADUM1250ARZ provide? A: The ADUM1250ARZ provides 2 channels of isolation, one for each of IN1A and IN1B. Q: Can the ADUM1250ARZ be used for both logic high and low signals? A: Yes, the device supports both logic high and low signals for input and output.

Q: What is the power consumption of the ADUM1250ARZ?

A: The typical quiescent current is low, and the power consumption depends on the supply voltage and signal rate.

Q: Can the ADUM1250ARZ be used in medical devices?

A: Yes, the ADUM1250ARZ is suitable for use in medical devices due to its robust isolation features and compliance with safety standards.

Q: How does the ADUM1250ARZ provide isolation?

A: It uses microtransformer technology to provide galvanic isolation between the primary and secondary sides.

Q: Can I use the ADUM1250ARZ in noisy environments?

A: Yes, the ADUM1250ARZ is designed to operate in noisy environments, providing excellent immunity to high-frequency noise.

Q: What is the function of the GND1 and GND2 pins?

A: GND1 and GND2 serve as the ground connections for the primary and secondary sides of the isolator, respectively.

Q: Does the ADUM1250ARZ need additional components for operation?

A: No, the ADUM1250ARZ is a complete isolation solution and does not require external components for basic operation.

Q: What is the input signal voltage range for IN1A and IN1B?

A: The input signal voltage range for IN1A and IN1B is typically 0V to 5V.

Q: How does the ADUM1250ARZ handle power supply variations?

A: The ADUM1250ARZ has internal circuitry to tolerate power supply variations and provides stable operation across its specified voltage range.

Q: Can the ADUM1250ARZ be used in data communication applications?

A: Yes, the ADUM1250ARZ is ideal for isolating data communication signals between different system sections.

Q: What is the typical delay time for the ADUM1250ARZ?

A: The typical propagation delay is very low, typically around 20ns, ensuring high-speed operation.

Q: Does the ADUM1250ARZ support bi-directional data transfer?

A: Yes, the device supports bi-directional data transfer on both input and output channels.

Conclusion:

The ADUM1250ARZ is a versatile, high-performance digital isolator ideal for systems requiring signal isolation, noise immunity, and high-speed data transfer. With its 8-pin SOIC package and simple pinout, it offers an easy-to-integrate solution for a wide range of industrial, automotive, and medical applications.