Overview
The ADuM121N0BRZ is a dual-channel digital isolator produced by Analog Devices Inc., utilizing the company's iCoupler technology. This component combines high-speed, complementary metal-oxide semiconductor (CMOS) and monolithic air core transformer technology to provide superior performance characteristics compared to optocoupler devices and other integrated couplers. The ADuM121N0BRZ is designed to ensure high-speed data transfer with minimal propagation delay and pulse width distortion, making it suitable for a wide range of applications requiring reliable digital isolation.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|---|
| Withstand Voltage | V_IOWM | - | - | 3 kV rms | - | - |
| Supply Voltage | VDDx | 1.8 | - | 5 | V | - |
| Propagation Delay | t_PHLH/t_PLHL | - | 13 | ns | - | - |
| Pulse Width Distortion | t_PWD | - | < 3 | ns | - | - |
| Channel Matching | t_M | - | 3.0 | ns | - | - |
| Output Rise/Fall Time | t_R/t_F | 2.5 | - | ns | 10% to 90% | - |
| Common-Mode Transient Immunity | |CMH| | 75 | - | 100 kV/µs | - | VIx = VDDx, VCM = 1000 V, transient |
| Undervoltage Lockout Positive Threshold | VDDxUV+ | 1.6 | - | V | - | - |
| Undervoltage Lockout Negative Threshold | VDDxUV− | 1.5 | - | V | - | - |
| Undervoltage Lockout Hysteresis | VDDxUVH | 0.1 | - | V | - | - |
Key Features
- High-Speed Data Transfer: The ADuM121N0BRZ offers high-speed data transfer with a maximum propagation delay of 13 ns and a pulse width distortion of less than 3 ns at 5 V operation.
- Dual-Channel Isolation: This component provides dual-channel digital isolation, ensuring independent data channels with a withstand voltage rating of 3 kV rms.
- Fail-Safe Options: The device includes fail-safe options where the outputs transition to a predetermined state when the input power supply is not applied or the inputs are disabled.
- Wide Supply Voltage Range: The ADuM121N0BRZ operates with supply voltages ranging from 1.8 V to 5 V, providing compatibility with lower voltage systems and enabling voltage translation functionality across the isolation barrier.
- Low Dynamic Supply Current: The device features low dynamic supply current, with 0.01 mA/Mbps for inputs switching at a 50% duty cycle.
- High Common-Mode Transient Immunity: It offers high common-mode transient immunity of up to 100 kV/µs.
Applications
- Industrial I/O: Suitable for industrial control systems, sensors, and actuators where reliable isolation is critical.
- Automotive Interfaces: Used in automotive systems such as CAN, audio, and Ethernet interfaces.
- Medical Devices: Applicable in medical devices requiring high isolation and low noise.
- RS-232 / RS-422 / RS-485 Interfaces: Ideal for serial communication interfaces where isolation is necessary.
- Powerline Communications: Used in powerline communication systems to ensure safe and reliable data transfer.
- USB and Other Serial Bus Applications: Suitable for USB and other serial bus applications requiring digital isolation.
Q & A
- What is the maximum propagation delay of the ADuM121N0BRZ?
The maximum propagation delay is 13 ns.
- What is the withstand voltage rating of the ADuM121N0BRZ?
The withstand voltage rating is 3 kV rms.
- What is the supply voltage range for the ADuM121N0BRZ?
The supply voltage range is from 1.8 V to 5 V.
- Does the ADuM121N0BRZ have fail-safe options?
Yes, the device includes fail-safe options where the outputs transition to a predetermined state when the input power supply is not applied or the inputs are disabled.
- What is the common-mode transient immunity of the ADuM121N0BRZ?
The common-mode transient immunity is up to 100 kV/µs.
- What are some typical applications of the ADuM121N0BRZ?
Typical applications include industrial I/O, automotive interfaces, medical devices, RS-232 / RS-422 / RS-485 interfaces, powerline communications, and USB and other serial bus applications.
- How does the ADuM121N0BRZ compare to optocoupler devices?
The ADuM121N0BRZ provides superior performance characteristics compared to optocoupler devices, including higher speed and lower pulse width distortion.
- What is the dynamic supply current of the ADuM121N0BRZ?
The dynamic supply current is 0.01 mA/Mbps for inputs switching at a 50% duty cycle.
- Is the ADuM121N0BRZ pin-compatible with other devices?
Yes, the ADuM121N0BRZ is pin-compatible with other devices such as the ADuM1280, ADuM1281, and ADuM1201.
- What technology does the ADuM121N0BRZ use for isolation?
The ADuM121N0BRZ uses Analog Devices' iCoupler technology, which combines CMOS and monolithic air core transformer technology.
