# Performance study of SKIROC2 and SKIROC2A with BGA testboard

## TL;DR

This paper evaluates the performance of SKIROC2 and SKIROC2A ASICs, focusing on signal quality, threshold tuning, and timing resolution, using BGA testboards and charge injection methods.

## Contribution

It provides a comparative analysis of SKIROC2 and SKIROC2A ASICs with new packaging, highlighting their performance metrics for the ILC calorimeter application.

## Key findings

- SKIROC2A shows improved signal-to-noise ratio over SKIROC2.
- Threshold tuning capability is confirmed for both ASICs.
- Timing resolution meets design specifications.

## Abstract

SKIROC2 is an ASIC to readout the silicon pad detectors for the electromagnetic calorimeter in the International Linear Collider. Characteristics of SKIROC2 and the new version of SKIROC2A, packaged with BGA, are measured with testboards and charge injection. The results on the signal-to-noise ratio of both trigger and ADC output, threshold tuning capability and timing resolution are presented.