NOII5SM1300A-QDC ON Semiconductor, NOII5SM1300A-QDC Datasheet - Page 20

• Manufacturer Part Number: NOII5SM1300A-QDC
• Manufacturer: ON Semiconductor

Specifications of NOII5SM1300A-QDC

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Timing Diagrams
Frame Rate
The pixel rate for this sensor is high enough to support a frame
rate of greater than 100 Hz for a window size of 640 × 480 pixels
(VGA format). Considering a row blanking time of 3.5 µs (as
baseline, see also
on page 17), this requires a minimum pixel rate of nearly 40 MHz.
The final bandwidth of the column amplifiers, output stage, and
others is determined by external bias resistors. With a nominal
pixel rate of 40 MHz, a full frame rate of a little more than 27
frames per second is obtained.
The frame period of the IBIS5-1300 sensor depends on the
shutter type.
Rolling Shutter
=> Frame period = (Nr. Lines × (RBT + pixel period × Nr. Pixels))
with:
Nr. Lines
Nr. Pixels
RBT
Pixel period 1/40 MHz = 25 ns
Example Read out time of the full resolution at nominal speed
(40-MHz pixel rate):
Frame period = (1024 × (3.5 µs + 25 ns × 1280)) = 36.4 ms =
27.5 fps
Global shutter
Frame period = Tint + Tread out
= Tint + (Nr. Lines × (RBT + pixel period × Nr. Pixels))
with: Tint
Nr. Lines
Nr. Pixels
RBT
Pixel period 1/40 MHz = 25 ns
Example Read out time of the full resolution at nominal speed
(40 MHz pixel rate) with an integration time of 1 ms:
Frame period = 1 ms + (1024 × (3.5 µs + 25 ns × 1280)) =
37.4 ms = 26.8 fps
Number of lines read out each frame (Y)
Number of pixels read out each line (X)
Row blanking time = 3.5 µs (typical)
Number of lines read out each frame (Y)
Number of pixels read out each line (X)
Row blanking time = 3.5 µs (typical)
Integration (exposure) time
Internal clock granularities (bits 4, 5, 6 and 7)
Rev. 9 | www.onsemi.com | Page 20 of 34
Region-of-Interest (ROI) Read Out
Windowing is easily achieved by uploading the starting point of
the X- and Y-shift registers in the sensor registers using the
various interfaces. This downloaded starting point initiates the
shift register in the X- and Y-direction triggered by the Y_START
(initiates the Y-shift register) and the Y_CLK (initiates the X-shift
register) pulse. The minimum step size for the x-address is two
(only even start addresses are chosen) and one for the
Y-address (every line is addressable). The frame rate increases
almost linearly when fewer pixels are read out.
overview of the achievable frame rates (in rolling shutter mode)
with various ROI dimensions.
Table 20. Frame Rate vs. Resolution
Timing Requirements
There are six control signals that operate the image sensor:
■
■
■
■
■
■
The external system generates these control signals with
following time constraints to SYS_CLOCK (rising edge = active
edge):
T
T
It is important that these signals are free of any glitches.
SETUP
HOLD
SS_START
SS_STOP
Y_CLOCK
Y_START
X_LOAD
SYS_CLOCK
1280 × 1024
Resolution
640 × 480
100 × 100
Image
(X×Y)
> 7.5 ns
>7.5 ns
Frame Rate
[frames/s]
1657
100
27
Readout Time
Frame
[ms]
NOII5SM1300A
0.6
36
10
Table 20
Full resolution.
ROI read out.
ROI read out.
Comment
gives an