Texas Instruments AMC60804 True EML Monitor & Controller

The AMC60804 VDACs support both positive and negative output range operation and are capable of sourcing and sinking up to 50mA, making them an excellent choice for biasing the electro-absorption modulator (EAM) in an EML. Additionally, the AMC60804 IDACs support a full-scale output range of 150mA with very low power dissipation, thus eliminating the need for external components to bias the EML laser diode. In combination, the AMC60804 four VDACs and four IDACs enable accurate biasing of up to four EML lasers.

The AMC60804 includes four input pins that are multiplexed to the ADC and incorporate a low-latency window comparator. This feature makes this device an excellent choice for received signal strength indicator (RSSI) and loss-of-signal (LOS) detection. The ADC is also capable of measuring the voltage at the IDAC pins, as well as the current being sourced or sinked by the VDACs, thus enabling monitoring of these outputs. The Texas Instruments AMC60804 low power, high integration, small size, and wide operating temperature range make the device an excellent choice as an all-in-one, low-cost control circuit for the EML lasers found in optical modules.