The wife, Akua Agyemang,32, also a Ghanaian died at the hospital while nursing the knife wounds.
Mr Adiddo, from Enfield, North London, had pleaded guilty to manslaughter, although he denied murder.
He told the UK court that heard the case that he suspected his wife was having an affair with their neighbour Oledapo Etti-Williams in October 2012.
Etti-Williams denied it, but said they exchanged three to four 'sometimes flirtatious' texts a day - and phone records showed they had sometimes sent as many as 80 messages in one day.
On November 5, 2012, Adiddo stabbed his wife with a large kitchen knife in their bedroom while their one-year-old daughter slept in a cot next to them.
Ms Agyeman managed to escape through the living room window, waking neighbours with her screams.
But her husband chased her down and stabbed her again in the street as she lay on the ground, leaving her with 15 separate stab wounds.
Adiddo fled the scene but was arrested after police spotted him driving his car shortly the next day still wearing his blood-stained shirt.
In a phone call to a relative, Addo admitted stabbing his wife and said he planned to kill himself before police caught up with him.
When Ms. Agyeman was in the Royal London Hospital, Adiddo sent her a Christmas card ascribing his behavior to 'Satan' and 'devils'.
'I know the devil used Williams to destroy our family,' he wrote. 'Please, please, please, I need forgiveness from you - open yourself to God.'
In victim impact statements read to the court, Ms Agyeman's family said the 'vibrant, sociable and intelligent' 32-year-old was 'irreplaceable.'