SQ82905XDS

High Integrated Analog Front End with Current and Voltage Output DACs and Multi-function IOs

SQ82905XDS High Integrated Analog Front End with Current and Voltage Output DACs and Multi-function IOs Datasheet

Parameters
Features
Description

Part number	SQ82905XDS
Description	Highly Integrated Analog Front End with Current and Voltage Output DACs and Multi-function IOs
VDD (V)	2.7 to 3.63
Interface	SPI, I2C
IDAC Channel(#)	4
IDAC Resolution (bit)	12
IDAC Range (mA)	100,150,200,250
VDAC Channel(#)	12
VDAC Resolution (bit)	12
VDAC Range (V)	2.5,VDD
ADC channel (#)
ADC Resolution (bit)
ADC Range
Operating temperature range(°C)	-40~105°C
Package	CSP3.55×3.44-56

Ø12-Channel, 12bit VDAC (voltage-output DAC)

•VDD: 2.7V – 3.63V

•Voltage output: (0V to 2.5V) or (0V to VDD-0.2V)

•Current output: -15mA to 35mA

Ø4-Channel, 12bit IDAC (current-output DAC)

•Maximum Current: 100/150/200/250mA

•Low headroom: 150mV max over temp

•Enable function (EN_IBIASx)

•Support 145℃ OT shutdown function

•PVDD Range: 1.5V to VDD

Ø12-Channel, Configurable IOs

•Support Voltage monitor

•Support input or output current monitor

•Support digital GPIOs

ØInternal channels for monitoring Power/VDAC/IDAC

ØI2C/SPI Interface

ØOver-temperature alarm function

Ø56-Ball WLCSP, 3.55x3.44mm2, 0.4mm pitch

The SQ82905 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 twelve channel multi-function IOs for voltage and current signal monitoring. And the comparator is integrated to monitor the received signal strength indicator (RSSI) and loss-of-signal (LOS).

The SQ82905 IBIASs provide a configurable full-scale output range of 100/150/200/250mA to bias the laser diode and there are four EN_IBIASx pin which support fast shut down for each IBIAS. In addition, the SQ82905 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 multi-function IOs, it supports voltage monitoring and both sink or source current monitoring.

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 SQ82905 low power, high integration, small size and wide temperature range are good for the SiPh control and monitor in optical modules.

Technical Documentation

Title	Date
Silergy_Catalog_Q3_2026	2026-11-04