Overview
The ADUM1250SRZ from Analog Devices Inc. is a hot swappable, dual I2C isolator designed to provide non-latching, bidirectional communication channels compatible with I2C interfaces. This component is part of the ADuM1250 series, which includes the ADuM1250 and ADuM1251 models. The ADUM1250SRZ is particularly useful in applications where isolation between two I2C buses is necessary, ensuring reliable and glitch-free data transmission even during hot swap operations.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage (VDD1, VDD2) | 3.0 | - | 5.5 | V | - |
| Maximum Frequency | - | - | 1000 | kHz | - |
| Output Fall Time (5V Operation) | 13 | 26 | 120 | ns | 4.5 V ≤ VDD1, VDD2 ≤ 5.5 V, CL1 = 40 pF, R1 = 1.6 kΩ, CL2 = 400 pF, R2 = 180 Ω |
| Output Fall Time (3V Operation) | 32 | 52 | 120 | ns | 3.0 V ≤ VDD1, VDD2 ≤ 3.6 V, CL1 = 40 pF, R1 = 1.0 kΩ, CL2 = 400 pF, R2 = 120 Ω |
| Ambient Operating Temperature (TA) | -40 | - | 105 | °C | A Grade |
| Insulation Voltage | - | - | 6250 | V peak | Surge Isolation Voltage |
| Current Sink Capability | - | - | 30 | mA | - |
Key Features
- Bidirectional I2C Communication: Supports non-latching, bidirectional communication channels compatible with I2C interfaces.
- Hot Swap Capability: Includes hot swap circuitry to prevent data glitches when an unpowered card is inserted onto an active bus.
- Open-Drain Interfaces: Designed for open-drain I2C signals.
- High-Speed Operation: Operates up to 1000 kHz.
- Wide Supply Voltage Range: Supports supply/logic levels from 3.0 V to 5.5 V.
- High Isolation Voltage: Provides surge isolation voltage up to 6250 V peak.
- Compact Form Factor: Available in an 8-lead SOIC package.
Applications
- Industrial Automation: Suitable for use in industrial control systems where isolation between different segments of the I2C bus is required.
- Medical Devices: Used in medical equipment to ensure isolation and safety in I2C communication.
- Automotive Systems: Applied in automotive electronics for reliable and isolated I2C communication.
- Consumer Electronics: Used in various consumer electronic devices requiring isolated I2C interfaces.
- Data Acquisition Systems: Utilized in data acquisition systems to isolate and protect the I2C bus.
Q & A
- What is the primary function of the ADUM1250SRZ?
The ADUM1250SRZ is a hot swappable, dual I2C isolator that provides non-latching, bidirectional communication channels compatible with I2C interfaces.
- What is the maximum frequency of operation for the ADUM1250SRZ?
The ADUM1250SRZ operates up to a maximum frequency of 1000 kHz.
- What is the supply voltage range for the ADUM1250SRZ?
The supply voltage range for the ADUM1250SRZ is from 3.0 V to 5.5 V.
- What is the purpose of the hot swap circuitry in the ADUM1250SRZ?
The hot swap circuitry prevents data glitches when an unpowered card is inserted onto an active bus.
- What is the maximum current sink capability of the ADUM1250SRZ?
The ADUM1250SRZ has a maximum current sink capability of 30 mA.
- What is the insulation voltage rating of the ADUM1250SRZ?
The ADUM1250SRZ has a surge isolation voltage rating of up to 6250 V peak.
- What are the typical operating temperatures for the ADUM1250SRZ?
The ambient operating temperature range for the ADUM1250SRZ is from -40°C to 105°C (A Grade).
- What package type is the ADUM1250SRZ available in?
The ADUM1250SRZ is available in an 8-lead SOIC package.
- What are some common applications of the ADUM1250SRZ?
The ADUM1250SRZ is commonly used in industrial automation, medical devices, automotive systems, consumer electronics, and data acquisition systems.
- Is the ADUM1250SRZ compliant with any specific safety standards?
Yes, the ADUM1250SRZ is certified according to various safety standards including DIN V VDE V 0884-10, UL, CSA, and CQC.
