EML/硅光控制芯片

LST6080

The LST6080 is a highly integrated, low-power, analog monitoring and control solution optimized for electro-absorption modulated lasers (EML).

The LST6080 includes four 10-bit current output digital-to-analog converters (IDACs) and four 10-bit voltage output DACs (VDACs) with programmable output ranges. The LST6080 also includes a 12-bit analog-to-digital converter (ADC) used for external signal and internal signal monitoring, a temperature alarm monitor and a high precision internal reference that eliminates the need of an external reference in most applications.

The LST6080 VDACs support negative output range -2.5V to 0 operation and are capable of sourcing and sinking up to 60 mA, making them a suitable choice for biasing the electro-absorption modulator (EAM) in an EML. Additionally, the LST6080 IDACs support a full-scale output range of 200 mA with very low power dissipation, thus eliminating the need for external components to bias the EML laser diode. In combination the LST6080 four VDACs and four IDACs enable accurate biasing of up to four EML lasers.

The LST6080 includes four input pins that are multiplexed to the ADC and incorporate a lowlatency window comparator, making it a suitable solution 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 sunk by the VDACs, thus enabling power monitoring of these outputs.

The LST6080 low power, high-integration, very 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.