Apple A5

The last operating system update Apple provided for a mobile device containing an A5 (iPad 2 CDMA, iPhone 4S, and first-generation iPad Mini cellular models) was iOS 9.3.6, which was released on July 22, 2019, as they were discontinued with the release of iOS 10 in 2016. The latest operating system update Apple has provided for an Apple TV containing an A5 (third-generation Apple TV and third-generation Rev A Apple TV) was Apple TV Software 7.9, which was released on March 14, 2022.

Design

The A5 chip features a dual-core 45 nm Cortex-A9 CPU (shrunk to 32 nm in later versions of the chip) including the Advanced SIMD (Neon) extension, and a dual-core 32 nm PowerVR SGX543MP2 GPU.

The A5 integrates an image signal processor unit (ISP) that can perform advanced image post-processing, such as face detection, white balance, and automatic image stabilization. The A5 also directly integrates Audience earSmart technology for removing surrounding background noise and secondary voices during phone calls.

The clock rate of the Cortex-A9 in the A5 used inside the iPad 2 and first-generation iPad Mini is 1 GHz. Both of these devices, unlike devices containing the A4 with a clock rate of 800 MHz, can automatically underclock their A5 chip to save battery life. The clock rate of the Cortex-A9 in the A5 used inside the iPhone 4S and fifth-generation iPod Touch is 800 MHz (underclocked from 1 GHz). It is unknown what the clock rate of the Cortex-A9 in the A5 used inside the third-generation Apple TV and third-generation Rev A Apple TV is.

When the A5 was first released, the production cost of the chip was estimated to be 75% more than the A4, with the difference expected to diminish when production would later increase. As of August 2012, the A5 was manufactured at Samsung's Austin, Texas factory. Samsung invested $3.6 billion in the Austin facility to produce various chips, and nearly all of the facility's output was dedicated to producing Apple chips. Samsung later invested a further $4.2 billion in the Austin facility in order to transition to a 28 nm fabrication process by the second half of 2013.