AMIS-710208-A7: 200dpi CIS Module

Data Sheet

4.0 Input/Output Terminals

Figure 3 shows location of the 8-pin connector, the control for adjusting the video gain and the contacts for the LED power supply. Note

that the glass window is facing down.

Figure 3: Module Rear View

“GAIN ADJUST” is used to change the analog gain. This is used to set the average video output (Vpavg) to a particular level when

different exposure levels are employed. Vpavg is factory set with a particular exposure level. Note that the exposure is the product of

light power and time of exposure (integration time). Since the module’s light power is a constant, then the total light exposure then

depends on its integration time, which is the time between two Start Pulses (SP).

The integration time is set at the factory usually according to the customer requirements; Vpavg is then adjusted to a particular level.

From this level, if the integration time is decreased or increased, the specified Vpavg will increase or decrease proportionally.

If it is necessary to restore the amplitude, within a limited range, it can be adjusted with the gain control.

Vpavg is measured with the module’s glass window facing down on a standard white uniform target similar to the standard white copy

or typing paper.

The module connector is an 8-pin 1mm surface mount flex cable, part number Molex 52207-0890. Table 1 lists the connector pin-out

and their descriptions.

Table 1: Pin Configuration

Pin Number

Symbol

Input/Output

Description

1

VOUT

O

Analog video output

2

Vdd

I

+5V power supply

3

Vn

I

-5V power supply

4

SP

I

SP for the shift register

5

GRD

I

Ground return for the module

6

CLOCK

I

Main clock input to the module shift register

7

GLED

I

Ground return for the LED light source

8

VLED

I

+5V power supply for the LED light source

3

AMI Semiconductor

– Jan. 06, M-20507-001

www.amis.com