The data come amid growing signs that the economic recovery in the euro zone is gathering pace. On Monday, data revealed that services and manufacturing activity in the region expanded in December. The Markit composite purchasing managers' index (PMI) data showed that activity in the sectors rose to 52.1 in December, up from 51.7 in the previous month.
But economists were quick to point out that although the region as a whole appeared to be doing well, growth was uneven on a regional level.
Germany, Ireland and Spain's PMIs, for example, all came in well above the 50-point mark indicates expansion. But France's negative trend accelerated in December, with services and manufacturing activity hitting a 7-month low.
(Read more: Euro zone manufacturing grows; France stumbles on)
Howard Archer, chief European economist at IHS Global Insight, said that although these economic surveys had eased some of the pressure on the ECB, Tuesday's inflation figures meant the bank was "more likely than not" to take further action eventually.
"The renewed dip in euro zone consumer price inflation to just 0.8 percent in December is particularly unwelcome news for the ECB as it takes inflation almost back down to the level where the bank felt compelled to cut interest rates," he said in a note.
"While the ECB remains adamant that deflation across the euro zone is not a serious risk, it will undoubtedly be uncomfortable with this latest dip in consumer price inflation which is over a percentage point below its target rate."