HiLight Semiconductor announces availability of CMOS 25Gbps TIAs for PIN and APD photodiode applications

Created July 12, 2019
Technologies and Products

UK-based HiLight has announced general sampling of a pair of new 25Gbps CMOS Transimpedance Amplifiers (TIAs) for 25Gbps and 100Gbps optical receivers. The HLR25G0 has been designed for PIN photodiode applications while the HLR25G1 is most suited to APD applications. Both TIAs are fabricated in a fine geometry pure CMOS process and designed specifically for low cost TO-can assemblies and chip-on-board applications due to their optimised pad-out, minimum bill-of-materials and small die size – both TIAs have dimensions of just 0.7mm x 1.05mm.

The HLC25G0 PIN PD TIA is suited to cost reducing TO-can and chip-on-board applications, especially the compact TO33 often found in 25G and 100G optics. The IC features adjustable gain and a wide photodiode input capacitance range which enables the HLR25G0 to work with multiple photodiode types and all 5, 6 and 7-pin TO formats, for a wide range of applications. Sensitivities of better than -17 dBm (4.5dB ER, BER 5E-5, CPD = 70 fF) across temperature have been demonstrated in application testing. Importantly, the HLR25G0 meets required industry standards for optical overload providing error free operation with input powers of up to +4.5dBm at 4.5dB ER.

The HLR25G1 targets avalanche photodiode receivers and can achieve sensitivities of better than -24 dBm (BER 5E-5) in TO-can ROSA. It is particularly suited to applications that require excellent receiver performance for links of 10km or more.

While the TIAs can be used in a wide range of 25 and 100Gbps applications, they are particularly suited to reducing material and assembly costs in the highly competitive 5G CPRI wireless optical communications market segment that requires industrial temperature operation ranges. Both TIAs feature internal digital temperature control of key parameters to maintain excellent sensitivity and overload performance across the operating temperature range.

Christian Rookes, VP Marketing at HiLight, commented “HiLight already have a complete family of innovative, cost effective, integrated CMOS solutions for high volume SR, LR, APD and PON optical transceivers up to 10Gbps and are now bringing the same innovation and integration to 25Gbps rates with the introduction of a new line of high sensitivity, pure CMOS, transimpedance amplifiers having unprecedented levels of digital control and programmability. Furthermore, the TIAs feature flexible configuration bonding pads to enable customers to build into TO-can, COB or hybrid assemblies.”

Jess Brown, VP Sales, commented “We are excited to be offering our customers the opportunity to cost-down their products with our highly integrated, minimum BOM solutions that offer class leading performance in a pure CMOS process. HiLight continues to be ‘first to CMOS’ with this ground-breaking new TIA product, and Customers can look forward to year-on-year cost-downs only CMOS on 12-inch wafers can provide.”

HiLight Semiconductor Ltd. is a venture capital backed, fabless chip company, founded in 2012 by veterans of several previous start-ups. Specialising in deep sub-micron CMOS, the company designs and supplies the world’s highest performance PMD and PHY ICs for high speed fibre-optics based communications and networking/Datacentre applications. The company is currently on track to reach the 100 Million ICs milestone later this year. HiLight is headquartered in Southampton, UK, with design offices in Bristol UK and sales and local technical support offices in China (Shenzhen, Wuhan), Taiwan and Japan.

For more information, visit https://hilight-semi.com/




This article was written
by Peter Dykes

Peter Dykes is a independent telecoms and technology journalist who has over that last 30 years written for a wide range of B2B publications and companies. A former BT engineer, he specialises in networks and associated support systems. He is currently Editor of Optical Connections.