SQ82906XDS

The SQ82906 is a highly integrated analog front end (AFE) which includes four channel 12-bit current output digital-to-analog converters (IBIASs), twelve channel 12-bit voltage output DACs and a 12-bit 1MSPS analog-to-digital converter (ADC) for sixteen external voltage/current input channels and internal signal monitoring. And the comparator is integrated to monitor the received signal strength indicator (RSSI) and loss-of-signal (LOS).

The SQ82906 IBIASs provide a configurable full-scale output range of 100/150/200/250mA to bias the laser diode and there are four EN_IBIASx pins which support fast shut down for each IBIAS. In addition, the SQ82906 has twelve 12-bit VDACs, which provides the range of 0V to 2.5V and 0V to VDRIVE-0.2V with 35mA source current capacity and 15mA sink current capacity. For the internal ADC part, it supports voltage measurement and both sink or source current measurement with on-chip resistor.

Communication to the device is performed through a 4-wire SPI-compatible interface for up to 20MHz or 2-wire I2C interface for up to 1MHz. The SQ82906 low power, high integration, small size and wide temperature range are good for the SiPh control and monitor in optical modules.