AMIS-722402: Contact Image Sensor

Data Sheet

6.0 Recommended Operating Conditions

Table 4 lists the recommended operating conditions @ 25

Table 4: Recommended Operating Conditions @ 25

Parameter

Symbol

Min.

Typ.

Max.

Units

Power supply

Vdd

3.0

3.3

3.6

V

Clock input voltage high level

(1)

2.4

3.3

3.6

V

Clock input voltage low level

(1)

0

0

0.8

V

Power supply current

IDD (sensor during readout)

IDD (sensor between readouts)

IDD (15 chip module)

8

3.0

50

12

4.5

75

mA

mA

mA

Reference voltage

(2)

VREF

0

0.35

0.8

V

Clock frequency

(3)

0.5

2.5

3.0

MHz

Pixel rate

(4)

0.5

2.5

3.0

MHz

Integration time @ 2400dpi

(line scan rate)

(5)

First die

Subsequent die

Tint

477

459

µs

µs / die

Clock pulse duty cycle

(6)

50

%

Notes:

1.

Applies to all clocks; GBST, SI and CLK.

2.

The dark level is set by the voltage on VREF and is recommended to be set externally to a voltage of 0.35V for optimal module operation.

3.

Although the device will operate with a pixel rate of less than 500kHz, it is recommended that the device be operated above 500kHz to maintain performance

characteristics. Operating below 500kHz may result in leakage current degradation.

4.

One pixel is clocked out for every clock cycle.

5.

Tint is the integration time of a single sensor and is the time between two SIs. The minimum integration time is the time it takes to clock out 75 inactive pixels and

1376 active pixels for the 2400dpi mode, 75 inactive pixels and 688 active pixels for the 1200dpi mode, 75 inactive pixels and 344 active pixels for 600dpi mode,

75 inactive pixels and 172 active pixels for 300dpi mode, at a given frequency.

However, if several sensors are cascaded together in a module then the minimum integration time for the 2400dpi mode is the time it takes to clock out 75 inactive

pixels and 1376 active pixels from the first sensor and 1376 pixels from each of all subsequent sensors, at a given frequency.

For cascaded sensors in the 1200dpi mode, the minimum integration time is the time it takes to clock out 75 inactive pixels and 688 active pixels from the sensor

and 688 pixels from each of all subsequent sensors, at a given frequency.

Similarly, for cascaded sensors in the 300dpi mode, the minimum integration time is the time it takes to clock out 75 inactive pixels and 172 active pixels from the

first sensor and 172 pixels from each of all subsequent sensors, at a given frequency.

6.

The clock duty cycle is defined as the ration of the positive duration of the clock to its period.

7.0 Absolute Maximum Ratings

Table 5 lists the absolute maximum ratings.

Table 5: Absolute Maximum Ratings

Parameter

Max.

Units

Power supply voltage (Vdd)

5

V

Clock input voltage high level

(1)

Vdd + 0.2

V

Clock input voltage low level

(1)

-0.5

V

Operating temperature

-10 to +50

°C

Operating humidity

+10 to +85

RH%

Storage temperature

-25 to +75

°C

Storage humidity

+10 to +90

RH%

Note:

1.

Applies to all clocks; GBST, SI and CLK.

8

AMI Semiconductor

– Jan. 06, M-20499-004

www.amis.com