One example to take advantage of TMUX7612-Q1 precision performance is the implementation of MEMs (Microelectromechanical systems) based LIDAR for ADAS systems .

LIDAR is often used in automotive systems to provide driver feedback on surroundings at a high spatial resolution. To achieve a 360° view, the LIDAR system will often be rotated while scanning. This solution; however, requires expensive and bulky mechanical components. One alternative to this mechanical solution is an electromechanical equivalent in the form of MEMs modules. These MEMs modules control the angle of many tiny mirrors based on an input analog voltage. The angle can be swept across overlapping MEMs modules to scan the environment and capture a full view. Additionally, to move the laser in 2 dimensions cascading mirrors are needed. To help maximize the MEMs modules, a switch can be placed in series with the MEMs controller to control the path of the tilt angle analog output. Each switch on the TMUX7612-Q1 can be controlled independently, so this solution has a high level of flexibility and can be optimized and expanded based on the number MEMs modules needed in the system.

MEMs systems are particularly susceptible to SNR issues. Since the tilt angle is controlled by an input analog voltage, any small error in this voltage could cause an improper angle and result in erroneous data. A low R_ON switch like the TMUX7612-Q1 with low leakage current (3.7 pA typical) reduces potential voltage offsets.

These LIDAR systems often have asymmetric supplies. It is possible that the positive and negative supply rails are +12 V and -30 V respectively. Additionally, in an automotive system, these supply rails can vary dramatically to as much as +6 V and -32 V. The TMUX7612-Q1 is well equipped to handle these supply situations. Not only can it operate with asymmetric supplies, the TMUX7612-Q1 can operate down to a +4.5 V minimum positive supply.

Figure 8-1 MEMs Module Switching for LIDAR