Overview
The AMIS-41682CANM1RG-A, produced by onsemi, is a fault-tolerant CAN (Controller Area Network) transceiver designed to serve as an interface between the CAN protocol controller and the physical wires of the CAN bus. This device is optimized for low-speed applications, particularly in the automotive sector, supporting baud rates up to 125 kB. It is part of the AMIS-41682 and AMIS-41683 family, with the AMIS-41683 variant offering a true 3.3 V digital interface to the CAN controller.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| DC Voltage at Pin CANH, CANL | 0 < VCC < 5.25 V; No Time Limit | -40 | 40 | V | |
| Voltage at Pin Vbat | Load-Dump | 40 | V | ||
| High-Level Input Voltage (Pins STB, EN, TXD) | 0.7 x VCC | 6.0 | V | ||
| Low-Level Input Voltage (Pins STB, EN, TXD) | -0.3 to 0.3 x VCC | -0.3 | 0.3 x VCC | V | |
| High-Level Output Voltage (Pins RXD and ERR) | Isource = -1 mA | VCC - 0.9 | VCC | V | |
| Low-Level Output Voltage (Pins RXD and ERR) | Isink = 1.6 mA | 0 | 0.4 | V | |
| Junction Temperature for Shutdown | 150 | 180 | °C |
Key Features
- Fully compatible with ISO11898-3 standard
- Optimized for in-car low-speed communication up to 125 kB
- Supports up to 32 nodes on the CAN bus
- Built-in slope control and matched CANL and CANH output stages for low electromagnetic emission (EME)
- Fully integrated receiver filters and permanent dominant monitoring of transmit data input
- Differential receiver with wide common-mode range for high electromagnetic susceptibility (EMS)
- Automatic switching to single-wire mode in case of bus failures, including short-circuit to VCC
- Automatic reset to differential mode once the bus failure is removed
- True 3.3 V digital I/O interface to CAN controller for AMIS-41683 variant
- Integrated timer to prevent permanent dominant state on the bus lines
- High common-mode range for the differential receiver ensuring reception under worst-case conditions
Applications
The AMIS-41682CANM1RG-A is primarily designed for use in automotive systems, particularly in passenger cars. It is suitable for low-speed CAN applications, such as:
- In-car multiplexing systems
- Automotive control systems requiring fault-tolerant CAN communication
- Systems needing high electromagnetic susceptibility and low electromagnetic emission
Q & A
- What is the primary function of the AMIS-41682CANM1RG-A?
The AMIS-41682CANM1RG-A serves as an interface between the CAN protocol controller and the physical wires of the CAN bus.
- What is the maximum baud rate supported by this device?
The device supports baud rates up to 125 kB.
- How many nodes can be connected to the CAN bus using this transceiver?
Up to 32 nodes can be connected.
- What happens in case of bus failures?
The device automatically switches to single-wire mode in case of bus failures and resets to differential mode once the failure is removed.
- Is the AMIS-41682CANM1RG-A compatible with ISO11898-3 standard?
Yes, it is fully compatible with the ISO11898-3 standard.
- What is the significance of the built-in slope control and matched output stages?
These features help in reducing electromagnetic emission (EME) and ensuring low electromagnetic susceptibility (EMS).
- How does the device handle permanent dominant state on the bus lines?
An integrated timer prevents the device from driving the bus lines to a permanent dominant state.
- What is the difference between AMIS-41682 and AMIS-41683?
The AMIS-41683 has a true 3.3 V digital interface to the CAN controller, whereas the AMIS-41682 does not.
- What is the junction temperature range for normal operation?
The device operates within a junction temperature range of -40°C to +150°C.
- What is the purpose of the integrated receiver filters?
The integrated receiver filters enhance the device's immunity against electromagnetic susceptibility (EMS).
