Launch day for the iPad 3 began very early as our team has been camped out at Best Buy in Ottawa since 3:30 am. We were first in line and our 4G unit made it back to the labs in no time at all. Yesterday we were lucky enough to be able to examine the high resolution images provided to us by our friends at iFixit via Melbourne, Australia. That opportunity allowed us to determine what was new and what was not. Our findings from that were that we have a whole lot of devices being recycled from the iPhone 4, iPhone 4S, and iPad 2.
|5 Mp Back Illuminated CMOS Image Sensor
The 5 Mp CMOS image sensor is new to the 3rd gen iPad, but is it new to us? It is very likely that Apple has recycled the 5 Mp back illuminated CMOS image sensor from the iPhone 4. That unit was the Omnivision OV5650. The OV5650 is the second generation back illumination (BSI) technology from OmniVision.
(clarification added March 19, 2012 – this is second generation BSI-1 with noted improvements over the first BSI-1 sensor we analyzed. It does not have the full feature-set consistent with BSI-2 and OmniVision does not market it as such)
This 5 Mp camera features 1.75 µm pixels, and is designed to deliver DSC quality in a mobile phone application. The sensor supports 720p HD video at 60 fps and 1080p at 30 fps. Apple specifications for the new iPad also tout the same specification. So the analysis we have just completed . . . drum roll please . . . says that the 5 Mp back illuminated CMOS image sensor in the new iPad is the same, it is the Omnivision OV5650 (die markings OV290BF). Yet again, Apple is recycling as many devices as they can to produce this new iPad. This is a very smart technique that keeps their costs and technological risks low. Apple would have placed large orders for this camera to build the iPhone 4 and now again for the new iPad, so hopefully they are leveraging these volumes to get a low unit price per camera.
Chipworks conducted a full analysis of the OV5650 when it first appeared in the iPhone 4. We have an Imager Process Review as well as die photos on this device in the Chipworks Store.
|Secondary Image Sensor
The secondary CMOS image sensor inside the new iPad is also a design win for Omnivision. This camera, the OV297AA, is a 0.3 Mp, 3.0 µm pixel pitch CMOS image sensor. Chipworks has seen this on the iPod Nano and the iPad 2.
The A5X in the new iPad was a bit of a surprise to us in that in previous iProducts using the A5 and A4 processors, that processor was configured in a package-on-package (PoP) assembly, whereby the LP DDR2 SDRAM sat on top of the A processor. In the new iPad, the A5X sits on one side of the motherboard and the twin Samsung LP DDR2 SDRAm (qty 2) sat on the other side of the motherboard. Of note is the recurring theme of Apple dual sourcing DRAM. The unit iFixit purchased in Australia utilized Elpida LP DDR2 and our unit utlized Samsung LP DDR2.
The A5X part number is APL5498 and the die markings repeat that same number as well. The balance of die markings indicate Samsung being the foundry for this processor (we really did not expect to see TSMC making the A5X, but one never knows). The A5x die measures 12.82 mm x 12.71 mm for an area of 162.94 mm². Compared to the A5 which measures 10.01 mm x 11.92 mm for an area of 119.32 mm². That is an increase in the die area by 36.5%! A fairly large increase to accommodate the dual-core CPUs and quad-core graphics processor. This indicates that Apple stuck with Samsungs’ low power 45 nm CMOS process. Our cross section is in progress now, so we’ll know soon enough when we can measure the contacted gate pitch.
We have confirmed that the A5X is indeed manufactured on Samsungs 45 nm LP CMOS Process. The measurements have been made and it’s in the bag. We show you here a general structure of the A5X.
Here is a more complete BoM table:
|Component Manufacturer||Item#||Device Type|
|Apple||338S0987 (Cirrus Logic)||Audio Codec|
|343S0561-A1 (Dialog Semi)||PMIC|
|APL5498 (A5X)||Dual Core CPU & Quad Core GPU|
|Asahi Kasei||AK8975||Electronic Compass|
|Micron Technology||MT29F1G08ABBDAMD-IT||1 Gb SLC NAND Flash|
|Murata||PFBA||Likely antenna diversity switch|
|SWUA||Likely antenna switch|
|SPM||Likely antenna switch|
|Parade Technologies, Inc.||DP635||LCD Driver|
|PM8028||Power Management IC|
|RTR8600||Multi band Transciever|
|Skyworks||SKY77468-16||Front End Module(PA+Duplexer)|
|SKY77469-16||Front End Module(PA+Duplexer)|
|SKY65513 (pkgmrk .1 13)||2.5 GHz WLAN Switch LNA|
|SKY65404 (pkgmak .4 31)||5 GHz WLAN Switch LNA|
|CD3240B0||Other Power Controllers and Drivers|
|QVP||Power Management IC|
|Toshiba||THGVX1G7D2GLA08||16 GB MLC NAND Flash|