CBC3: a CMS microstrip readout ASIC with logic for track-trigger modules at HL-LHC

Abstract

The CBC3 is the latest version of the CMS Binary Chip ASIC for readout of the outer radial region of the upgraded CMS Tracker at HL-LHC. This 254-channel, 130nm CMOS ASIC is designed to be bump-bonded to a substrate to which sensors will be wire-bonded. It will instrument double-layer 2S-modules, consisting of two overlaid silicon microstrip sensors with aligned microstrips. On-chip logic identifies first level trigger primitives from high transversemomentum tracks by selecting correlated hits in the two sensors. Delivered in late 2016, the CBC3 has been under test for several months, including X-ray irradiations and SEU testing. Results and performance are reported.

Prototyping of Hybrid Circuits for the CMS Phase-2 Outer Tracker Upgrade at the HL-LHC

“…The 2S front-end hybrids contain eight CBC3 [3] front-end chips (Figure 2), while the PS hybrids contain eight SSA [4] chips ( Figure 3). Both hybrid types have a data concentrator (CIC chip [5]) that aggregates and transfers the data towards an optical block based on the lpGBT transceiver [6].…”

“…However, the hybrids need to be CTE balanced to eliminate the development of bow. 3 Mitsubishi K13D2U-EX1515…”

Tracking Triggers for the HL-LHC

“…Stubs are formed in the MacroPixel ASIC (29) in the PS modules and in the CMS binary chip (30) in the 2S modules. The stubs formed in the front-end ASICs are communicated to the concentrator chips [concentrator integrated circuits (CICs)] (31).…”

A System-Verilog Verification Environment for the CIC Data Concentrator ASIC of the CMS Outer Tracker Phase-2 Upgrades

“…In Figure 1 a cross section of the PS module/2S module is shown. The readout of the two sensor layers is done by 16 SSA [2] and 16 MPA ASICs [3] in the PS module and by 16 CBC ASICs [4] in the 2S module. To reduce the module output bandwidth a concentrator chip has been developed, namely the CIC.…”