Overview
The ADUM1251ARZ-RL7, produced by Analog Devices Inc., is a hot swappable digital isolator designed for bidirectional I2C communication. This component is part of the ADuM1250/ADuM1251 series, which features non-latching, bidirectional communication channels compatible with I2C interfaces. It is particularly useful in applications where hot swapping and isolation between different voltage domains are required.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| 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 |
| Supply Voltages | -0.5 V | - | +7.0 V | V | VDD1 to GND1, VDD2 to GND2 |
| Ambient Operating Temperature (A Grade) | -40°C | - | +105°C | °C | - |
| Ambient Operating Temperature (S, W Grades) | -40°C | - | +125°C | °C | - |
| Input/Output Voltage | -0.5 V | - | VDD1 + 0.5 V | V | Side 1 (VSDA1, VSCL1) |
| Input/Output Voltage | -0.5 V | - | +7.0 V | V | Side 2 (VSDA2, VSCL2) |
| Resistance (Input to Output) | 10^12 Ω | - | - | Ω | - |
| Capacitance (Input to Output) | - | - | 1.0 pF | pF | f = 1 MHz |
Key Features
- Bidirectional I2C communication
- Open-drain interfaces
- Suitable for hot swap applications
- 30 mA current sink capability
- 1000 kHz operation
- 3.0 V to 5.5 V supply/logic levels
- Hot swappable to prevent glitching data when an unpowered card is inserted onto an active bus
- Non-latching communication channels
Applications
The ADUM1251ARZ-RL7 is versatile and can be used in various applications, including:
- Automotive interfaces (CAN, Audio, Ethernet)
- Industrial I/O
- IO-Link
- Local Interconnect Transceivers (LIN TxRx)
- Level Translators
- Serial Bus Buffers, Extenders, and Accelerators
- Signal Line Protection
Q & A
- What is the maximum frequency of operation for the ADUM1251ARZ-RL7?
The maximum frequency of operation is 1000 kHz. - What are the supply voltage ranges for the ADUM1251ARZ-RL7?
The supply voltages range from 3.0 V to 5.5 V. - Is the ADUM1251ARZ-RL7 suitable for hot swap applications?
Yes, it is designed for hot swap applications to prevent glitching data when an unpowered card is inserted onto an active bus. - What is the current sink capability of the ADUM1251ARZ-RL7?
The current sink capability is up to 30 mA. - What are the operating temperature ranges for the ADUM1251ARZ-RL7?
The ambient operating temperature ranges are -40°C to +105°C for A Grade and -40°C to +125°C for S and W Grades. - What is the input/output voltage range for Side 1 and Side 2 of the ADUM1251ARZ-RL7?
For Side 1, the input/output voltage range is -0.5 V to VDD1 + 0.5 V, and for Side 2, it is -0.5 V to +7.0 V. - What is the resistance between the input and output of the ADUM1251ARZ-RL7?
The resistance between the input and output is 10^12 Ω. - What is the capacitance between the input and output of the ADUM1251ARZ-RL7?
The capacitance between the input and output is 1.0 pF at f = 1 MHz. - Can the ADUM1251ARZ-RL7 be used in industrial applications?
Yes, it is suitable for industrial I/O applications. - What package type is the ADUM1251ARZ-RL7 available in?
The ADUM1251ARZ-RL7 is available in an 8-lead SOIC package.
