安森美PYTHON CMOS图像传感器：1300/500/300像素规格详解

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"安森美PYTHON1300/500/300 CMOS图像传感器是一款适用于嵌入式系统的高性能传感器，提供1.3、0.5和0.3百万像素的不同尺寸选项，适合各种光学应用。该传感器具备全球快门功能，拥有低噪声像素设计，并支持多种数据输出模式，包括LVDS和并行接口，能够实现高速帧率，提高系统性能。此外，还具备零行过头时间（ZROT）模式，能进一步提升帧率，以及内置的10位模拟数字转换器（ADC）和可编程的感兴趣区域（ROI）功能，增强了灵活性和效率。" 安森美的PYTHON系列CMOS图像传感器是一款专为嵌入式应用设计的高规格传感器，涵盖PYTHON1300、PYTHON500和PYTHON300三种型号，分别提供1280x1024、800x600和640x480的活动像素，对应1/2"、1/3.6"和1/4"的光学格式，满足不同场景的分辨率需求。传感器的核心特性之一是其4.8微米x4.8微米的低噪声全局快门像素，集成了像素内电荷倍增和消减（CDS）功能，确保在捕获动态图像时具有优秀的信噪比。此传感器提供多种数据输出选择，如P1-SN/SE/FN的4路LVDS数据通道，P2-SN/SE的10位并行接口，以及P3-SN/SE/FN的2路LVDS数据通道，为系统设计提供了极大的灵活性。在高速数据传输方面，PYTHON1300/500/300表现出色，尤其是在全分辨率下，4路LVDS数据通道的配置下，例如PYTHON1300在ZROT或NROT模式下可以达到210/165帧每秒的SXGA帧率，而PYTHON500和PYTHON300在相同模式下也能分别实现545/385和815/545帧每秒的VGA帧率。对于CMOS输出，全分辨率下的帧率也相当高，例如PYTHON1300在ZROT/NROT模式下可以达到50/43帧每秒的SXGA帧率。此外，传感器支持零行过头时间（ZROT）模式，这种模式能够消除行同步信号带来的额外时间开销，从而显著提高帧率，这对于实时监控、机器视觉和其他对帧率有严格要求的应用至关重要。另外，PYTHON系列还集成了一个片上10位模拟数字转换器（ADC），能够直接将模拟信号转换为数字信号，简化了系统设计。传感器还提供随机可编程的感兴趣区域（ROI）功能，这意味着用户可以根据实际应用场景自由定义需要捕获的图像区域，这不仅节省了带宽，还能优化处理效率，特别是在处理大分辨率图像但只需要部分区域信息的情况下。安森美PYTHON1300/500/300 CMOS图像传感器凭借其高分辨率、高速度、高灵活性和强大的功能，成为嵌入式系统中的理想选择，尤其适用于需要精确图像捕捉和高效处理的领域，如自动驾驶、无人机、工业自动化和医疗成像等。

NOIP1SN1300A

www.onsemi.com

OPERATING MODES

Global Shutter Mode

The PYTHON 300, PYTHON 500, and PYTHON 1300

operate in pipelined or triggered global shuttering modes. In

this mode, light integration, light integration takes place on

all pixels in parallel, although subsequent readout is

sequential. Figure 11 shows the integration and readout

sequence for the global shutter. All pixels are light sensitive

at the same period of time. The whole pixel core is reset

simultaneously and after the integration time all pixel values

are sampled together on the storage node inside each pixel.

The pixel core is read out line by line after integration. Note

that the integration and readout can occur in parallel or

sequentially. The integration starts at a certain period,

relative to the frame start.

Figure 11. Global Shutter Operation

Pipelined Global Shutter Mode

In pipelined global shutter mode, the integration and

readout are done in parallel. Images are continuously read

and integration of frame N is ongoing during readout of the

previous frame N−1. The readout of every frame starts with

a Frame Overhead Time (FOT), during which the analog

value on the pixel diode is transferred to the pixel memory

element. After the FOT, the sensor is read out line per line

and the readout of each line is preceded by the Row

Overhead Time (ROT). Figure 12 shows the exposure and

readout time line in pipelined global shutter mode.

Master Mode

The PYTHON 300, PYTHON 500, and PYTHON 1300

operate in pipelined or triggered global shuttering modes. In

this mode, light, the integration time is set through the

images autonomously. The sensor acquires images without

any user interaction.

Figure 12. Integration and Readout for Pipelined Shutter

Reset

Exposure Time N

Reset

N+1

Exposure Time N+1

Readout Frame N-1 FOTFOT Readout Frame N

ÉÉ

FOT

Integration Time

Handling

Readout

Handling

ÉÉ

ROT Line Readout

FOT FOT

Slave Mode

The slave mode adds more manual control to the sensor.

The integration time registers are ignored in this mode and

the integration time is instead controlled by an external pin.

As soon as the control pin is asserted, the pixel array goes out

of reset and integration starts. The integration continues

until the user or system deasserts the external pin. Upon a

falling edge of the trigger input, the image is sampled and the

readout begins. Figure 13 shows the relation between the

external trigger signal and the exposure/readout timing.

NOIP1SN1300A

www.onsemi.com

Figure 13. Pipelined Shutter Operated in Slave Mode

Reset

Exposure Time N

Reset

N+1

Exposure T im e N+1

Readout N−1 FOTFOT Readout N

ÉÉ

FOT

Integration Time

Handling

Readout

Handling

ÉÉ

ROT Line Readout

External Trigger

FOT FOT

Triggered Global Shutter Mode

In this mode, manual intervention is required to control

both the integration time and the start of readout. After the

integration time, indicated by a user controlled pin, the

image core is read out. After this sequence, the sensor goes

to an idle mode until a new user action is detected.

The three main differences with the pipelined global

shutter mode are:

• Upon user action, one single image is read.

• Normally, integration and readout are done

sequentially. However, the user can control the sensor

in such a way that two consecutive batches are

overlapping, that is, having concurrent integration and

readout.

• Integration and readout is under user control through an

external pin.

This mode requires manual intervention for every frame.

The pixel array is kept in reset state until requested.

The triggered global mode can also be controlled in a

master or in a slave mode.

Master Mode

In this mode, a rising edge on the synchronization pin is

used to trigger the start of integration and readout. The

integration time is defined by a register setting. The sensor

autonomously integrates during this predefined time, after

which the FOT starts and the image array is readout

sequentially. A falling edge on the synchronization pin does

not have any impact on the readout or integration and

subsequent frames are started again for each rising edge.

Figure 14 shows the relation between the external trigger

signal and the exposure/readout timing.

If a rising edge is applied on the external trigger before the

exposure time and FOT of the previous frame is complete,

it is ignored by the sensor.

Figure 14. Triggered Shutter Operated in Master Mode

Reset

Exposure Time N

Reset

N+1

Exposure Time N+1

Readout N-1 FOTFOT Readout N

ÉÉ

FOT

Integration Time

Handling

Readout

Handling

ÉÉ

ROT Line Readout

External Trigger

No effect on falling edge

FOT FOT

Slave Mode

Integration time control is identical to the pipelined

shutter slave mode. An external synchronization pin

controls the start of integration. When it is de−asserted, the

FOT starts. The analog value on the pixel diode is

transferred to the pixel memory element and the image

readout can start. A request for a new frame is started when

the synchronization pin is asserted again.

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