The C151 combines an integrated temperature driver and laser driver in one package. Temperature control is fully linear; a separate power supply can be used for the laser TEC. TEC control can be via the built-in PI loop or an external signal. The laser driver has an analog bandwidth of 250 kHz; a separate fast TTL compatible switching is provided via a SMB connector. The laser current has a hardware limit of 250 mA which cannot be exceeded without customisation.