2. C2 Camera Technical Reference Manual#

C1

2.1. Overview#

The C2 camera is a GMSL (Gigabit Multimedia Serial Link) camera specifically designed for automotive applications. It has a resolution of 5.4 MP at 2880 x 1860 px.

Featuring Sony Semiconductor Solutions’ IMX490 back-side illumination stacked CMOS image sensor SoC, this camera enables HDR imaging over 120dB, LED flicker mitigation (LFM), and motion artifact-free image capturing at a frame rate of up to 30fps. The C2 camera is suitable for a variety of applications, such as object recognition and signal recognition, thanks to its simultaneous high sensitivity and high resolution.

With a variety of lens options available, the C2 camera can be adapted to many applications. The lens undergoes a 6-axis active adjustment during installation, allowing it to achieve optimal sharpness even in harsh temperature environments.

Indie-semiconductor’s GW5300 ISP (Image Signal Processor) built into the C2 camera performs various image processing tasks, including lens distortion correction, to achieve optimal image quality for automotive applications. The C2 camera also supports an external triggering mechanism, which is essential to achieve capture synchronization with other sensor modalities such as LiDAR or RADAR, enabling sensor fusion.

Designed for automotive mass production, the C2 camera is ready-to-use. All key components comply with AEC-Q100 (Grade 2), Q101, and Q200 standards, and are designed to pass automotive-grade reliability tests.

2.2. Mechanical specifications#

2.2.1. Camera size#

Model Name

C2-30

C2-062

C2-120

C2-176

Camera size

45mm x 45mm x 48.6mm

45mm x 45mm x 53.55mm

45mm x 45mm x 53.04mm

45mm x 45mm x 45.9mm

2.2.2. Connector#

Fakra Z code with metal shielding

2.2.3. Outline diagram#

../_images/c2_outline_030.png

Fig. 2.10 C2-030 (30°)#

../_images/c2_outline_062.png

Fig. 2.11 C2-062 (62°)#

../_images/c2_outline_120.png

Fig. 2.12 C2-120 (120°)#

../_images/c2_outline_176.png

Fig. 2.13 C2-176 (176°)#

2.2.4. 3-dimensional CAD data#

3-dimensional CAD data can be downloaded. Refer to the download link

2.3. Lens specifications#

Model Name

C2-30

C2-062

C2-120

C2-176

Field of View (FoV) Horizontal / Vertical

LDC off 30deg / 19.5deg (no distortion correction applied)

LDC off 63.5deg / 40deg on 63deg / 40deg

LDC off 120deg / 73deg on 107deg / 73deg

LDC off 176.4deg / 105.8deg on 143deg / 102deg

F#

1.6

1.7

1.6

1.8

EFL

16.3mm

7.9mm

4.63mm

3.1mm

TTL

30.01mm

35mm

35mm

27.86mm

Image Circle

\(\phi\) 10.5mm

\(\phi\) 10.66mm

\(\phi\) 10.6mm Max

\(\phi\) 9.1mm Max

IRCF

650nm @ 50% transmission

650nm @ 50% transmission

650nm @ 50% transmission

650nm @ 50% transmission

Resolution (TV Line)

1000TVL @ Center, 700TVL @ 70% Image height

1000TVL @ Center, 700TVL @ 70% Image height

1000TVL @ Center, 600TVL @ 70% Image height

900TVL @ Center, 500TVL @ 70% Image height

Depth of Field

14m - Infinity Focus peaking distance: 28m

309cm - Infinity Focus peaking distance: 620cm

250cm - Infinity Focus peaking distance: 400cm

45cm - Infinity Focus peaking distance: 90cm

2.3.1. Lens Mount#

Glued, active alignment applied.

Attention

The lens cannot be exchanged.

2.4. Electrical specifications#

2.4.1. Power supply method#

Power over coax cable

2.4.2. Power consumption#

4.6W (at 30fps operation, under room temperature)

2.4.3. Power supply level#

9 - 12 [V]

2.5. Key components#

2.5.1. Image Sensor#

Sony Semiconductor Solutions IMX490

2.5.2. Optical format#

diagonal 10.36mm, type 1/1.55’’

2.5.3. Pixel size#

3.0um

2.5.4. High dynamic range#

Available, 120dB equivalent

2.5.5. LED flicker mitigation#

Available.

See also

What is the LED Flicker Mitigation (LFM)?

2.5.6. Serializer#

Analog Devices MAX9295A

2.5.7. ISP#

Indie semiconductor GW5300

2.6. Block diagram#

../_images/C2_block_diagram.drawio.png

Fig. 2.14 Block diagram of C2 camera#

2.7. Camera function#

2.7.1. Output interface#

GMSL2

2.7.2. Output image format#

YUV422 8bit. 16bit/pixel bit depth.

2.7.3. Output image size#

2880 x 1860

2.7.4. Framerate#

Up to 30fps

2.7.5. Shutter type#

Rolling Shutter

Note

Shutter type cannot changed

2.7.6. Drive mode#

  • Master mode: The camera operates based on its framerate setting.

  • Trigger mode: See below for the details.

2.7.7. Synchronization#

Attention

Please note that the trigger specification differs between the C1 and C2 cameras due to the different specifications of their image sensors. When developing a synchronization system using both C1 and C2 cameras, please take this difference into account. Refer to the the specification of C1 camera for the details.

C2 camera supports trigger-based synchronization. The host (e.g., ECU) sends a synchronization signal (FSYNC) via the GMSL interface to the image sensor. When the image sensor receives an FSYNC signal, the readout starts.

../_images/c2_sync_1.png

Fig. 2.15 FSYNC adjusts frame output timing#

More precisely, the camera will adjust its start timing of readout by measuring the time difference between the internal synchronization timing and FSYNC reception timing. This adjustment occurs 2 frames after the FSYNC reception.

The exposure will start before the exposure time which is controlled by the camera or user.

../_images/c2_sync_2.png

Fig. 2.16 Timing adjustment frame#

In trigger mode, in case no FSYNC is inputted to the camera, the camera will output the image data based on its original frame rate setting.

The FSYNC pin of the image sensor is connected to the MFP3 GPIO of the serializer. The user needs to configure the deserializer so the synchronization output pin on the ECU is mapped to this pin.

2.7.8. Embedded data output#

Not supported yet. To be supported in future driver/FW version.

2.8. ISP function#

ISP setting can be controlled by using T4cam-ctrl software.

  • AE (Auto Exposure)

  • AWB (Auto White Balance)

  • Basic image tuning interfaces

    • Hue

    • Saturation

    • Contrast

    • Brightness

    • Sharpness

2.9. Quality/Environmental specifications#

2.9.1. Operating temperature range#

  • -40° ~ 85°

2.9.2. Storage temperature range#

  • -40°C ~ 105°C

2.9.3. Product reliability#

  • Please contact our authorized agency for the details.

2.9.4. Compliances#

  • CE

  • RoHS

  • FCC

  • Can ICES-3

  • UKCA

  • RCM

  • KC

2.9.5. Safety#

LVD compliant

2.9.6. Ingress protection#

The camera has IP69K-grade ingress protection.

Note

To realize IP69K, the user needs to use a water-resistant Fakra cable. To distinguish the water-resistant and non-water-resistant cable, please refer below.