MT9V032C12STMH-GEVB Datasheet MT9V032C12STMH-GEVB, MT9V032C12STCH-GEVB | P52-P54

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Figure 35. Propagation Delays for PIXCLK and Data Out Signals

OUT

(9:0)

PLH

SYSCLK

PIXCLK

HDSD

PDPD

Figure 36. Propagation Delays for FRAME_VALID and LINE_VALID Signals

FRAME_VALID

LINE_VALID

FRAME_VALID

LINE_VALID

PIXCLK PIXCLK

FLR FLF

Performance Specifications

Table 15 summarizes the specification for each

performance parameter.

Table 15. PERFORMANCE SPECIFICATIONS

Parameter

Unit Minimum Typical Maximum Test Number

Sensitivity LSB 400 572 745 1

DSNU LSB N/A 2.3 7.0 2

PRNU % N/A 1.3 4.0 3

Dynamic Range dB 52.0 54.4 N/A 4

SNR dB 33.0 37.3 N/A 5

NOTES: All specifications address operation is at T

=25°C (±3°C) and supply voltage = 3.3V. Image sensor was tested without a lens.

Multiple images were captured and analyzed.

Setup: VDD = VAA = VAAPIX = LVDSVDD = 3.3V. Testing was done with default frame timing and default register settings, with

the exception of AEC/AGC, row noise correction, and auto black level, which were disabled.

Performance definitions are detailed in the following sections.

Test 1: Sensitivity

A flat−field light source (90 lux, color temperature

4400K, broadband, w/ IR cut filter) is used as an

illumination source. Signals are measured in LSB on the

sensor output. A series of four frames are captured and

averaged to obtain a scalar sensitivity output code.

Test 2: Dark Signal Nonuniformity (DSNU)

The image sensor is held in the dark. Analog gain is

changed to the maximum setting of 4X. Signals are

measured in LSB on the sensor output. A series of four

frames are captured and averaged (pixel−by−pixel) into one

average frame. DSNU is calculated as the standard deviation

of this average frame.

Test 3: Photo Response Nonuniformity (PRNU)

A flat−field light source (90 lux, color temperature

4400K, broadband, with IR cut filter) is used as an

illumination source. Signals are measured in LSB on the

sensor output. Two series of four frames are captured and

averaged (pixel−by−pixel) into one average frame, one

series is captured under illuminated conditions, and one is

captured in the dark. PRNU is expressed as a percentage

relating the standard deviation of the average frames

difference (illuminated frame − dark frame) to the average

illumination level:

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PRNU + 100

i+1

illumination

(i) * S

dark

(i)

i+1

illumination

(i))

(eq. 19)

Where S

illumination

(i) is the signal measured for the i−th pixel

from the average illuminated frame, S

dark

is the signal

measured for the i−th pixel from the average dark frame, and

is the total number of pixels contained in the array.

Test 4: Dynamic Range

A temporal noise measurement is made with the image

sensor in the dark and analog gain changed to the maximum

setting of 4X. Signals are measured in LSB on the sensor

output. Two consecutive dark frames are captured.

Temporal noise is calculated as the average pixel value of the

difference frame:

i+1

* S

)

2 @ N

(eq. 20)

Where S

is the signal measured for the i−th pixel from the

first frame, S

is the signal measured for the i−th pixel from

the second frame, and N

is the total number of pixels

contained in the array.

The dynamic range is calculated according to the

following formula:

DynamicRange + 20

log

(4 1022)

(eq. 21)

Where 

is the temporal noise measured in the dark at 4X

gain.

Test 5: Signal−to−Noise Ratio

A flat−field light source (90 lux, color temperature

4400K, broadband, with IR cut filter) is used as an

illumination source. Signals are measured in LSB on the

sensor output. Two consecutive illuminated frames are

captured. Temporal noise is calculated as the average pixel

value of the difference frame (according to the formula

shown in Test 4).

The signal−to−noise ratio is calculated as the ratio of the

average signal level to the temporal noise according to the

following formula:

Signal * to * Noise * Ratio + 20

log

((

i+1

)ńN

(eq. 22

)

Where σ

is the temporal noise measured from the

illuminated frames, S

is the signal measured for the i−th

pixel from the first frame, and N

is the total number of

pixels contained in the array.

Two−Wire Serial Bus Timing

The two−wire serial bus operation requires certain

minimum master clock cycles between transitions. These

are specified in the following diagrams in master clock

cycles.

Figure 37. Serial Host Interface Start Condition Timing

SCLK

DATA

Figure 38. Serial Host Interface Stop Condition Timing

NOTE: All timing are in units of master clock cycle.

SCLK

SDATA

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Figure 39. Serial Host Interface Data Timing for WRITE

SCLK

DATA

NOTE: S

DATA is driven by an off-chip transmitter.

Figure 40. Serial Host Interface Data Timing for READ

SCLK

DATA

NOTE: SDATA is pulled LOW by the sensor, or allowed to be pulled HIGH by a pull-up resistor off-chip.

Figure 41. Acknowledge Signal Timing After an 8-Bit WRITE to the Sensor

SCLK

Sensor pulls down

DATA pin

SDATA

Figure 42. Acknowledge Signal Timing After an 8-Bit READ from the Sensor

SCLK

Sensor tri−states S

DATA pin

(turns off pull down)

DATA

NOTE: After a READ, the master receiver must pull down S

DATA to acknowledge receipt of data bits. When read sequence is

complete, the master must generate a “No Acknowledge” by leaving S

DATA to float HIGH. On the following cycle,

a start or stop bit may be used.

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