ZLG helps you easily connect to the CAN FD era and achieve seamless upgrade

With the vigorous development of automotive electronics and industrial automation, the number of devices and data on the CAN bus have greatly increased. To this end, ZLG has upgraded the original CTM1051AM module to CAN FD based on nearly 20 years of CAN bus isolation technology, fully helping the industry to speed up.

Since its birth in the 1880s, the CAN bus has been widely used in the automotive, industrial control and other industries. With the vigorous development of automotive electronics and industrial automation, the number of devices and data volume on the CAN bus have greatly increased. In order to meet higher bandwidth and data throughput, CAN FD (CAN with Flexible Data-Rate) was born.

The ZLG CTM1051M series of small-volume fully isolated CAN transceivers is a module product used for CAN bus transmission and isolation in industrial fields. It is widely praised by the industry for its ultra-small size and stable performance. Now, in response to industry needs, the product solution has been upgraded to support the CAN FD protocol, and the transmission rate has been increased from 1Mbps to 5Mbps, which fully helps the industry speed up.

Figure 1 CTM1051M series CAN FD upgrade

1. Introduction to the characteristics of CAN FD

1. Higher transmission rate

The data segment of CAN FD can be transmitted at a higher rate, such as 5Mbit/s. In order to ensure the robustness and reliability of the bus, the arbitration segment (ID and ACK) remains unchanged and is transmitted at a standard rate (up to 1Mbit/s). The measured waveform comparison is shown in Figure 2 and Figure 3.

Figure 2 Traditional CAN bus waveform

Figure 3 CAN FD bus waveform

2. More Data Bytes

The traditional CAN can only transmit 8 bytes of data per frame, while the CAN FD can transmit 64 bytes per frame, which can effectively avoid data segmentation. The measured waveform comparison is shown in Figure 4 and Figure 5.

Figure 4 Traditional CAN data segment

Figure 5 CAN FD data segment

2. CTM1051(A)M Series Performance Improvements

The main improvements of ZLG's CTM1051(A)M this time include rate increase and static current optimization: the rate is increased from 40k~1Mbps to 40k~5Mbps to fully support CAN FD communication; the static current is reduced from 30mA to 10mA to meet some low-power application scenarios. The specific performance parameters are shown below.

• Supports CAN and CAN FD, with rates ranging from 40k to 5Mbps;

• Static power consumption is as low as 10mA;

• Ultra-small size, occupying a board area of ​​only 12.80×10.20mm;

• -40~105℃ ultra-wide temperature range;

• 110 nodes can form a large network;

• Excellent EMC performance, passed comprehensive EMC tests.

Figure 6 CTM1051M series CAN FD module