UPD3794CY NEC, UPD3794CY Datasheet
UPD3794CY
Available stocks
Related parts for UPD3794CY
UPD3794CY Summary of contents
Page 1
PIXELS The PD3794 is a color CCD (Charge Coupled Device) linear image sensor which changes optical images to electrical signal and has the function of color separation. The PD3794 has 3 rows of 2700 pixels, and each row has ...
Page 2
BLOCK DIAGRAM SEL1 SEL2 V GND GND OUT Clamp pulse generator 2 11 Photocell · · · · · · (Green) Transfer gate CCD analog shift register Photocell · · · · · ...
Page 3
... Blue photocell array Channel stopper 8 m Red photocell array PD3794 RGB select input 1 No connection RGB select input2 Output drain voltage OD No connection No connection No connection Ground 1 Shift register clock 1 TG1 Transfer gate clock 1 (for Green) Transfer gate clock 2 TG2 (for Blue) ...
Page 4
ABSOLUTE MAXIMUM RATINGS (T Parameter Output drain voltage Shift register clock voltage Reset gate clock voltage Transfer gate clock voltage RGB select input voltage Operating ambient temperature Storage temperature Caution Exposure to ABSOLUTE MAXIMUM RATINGS for extended periods may affect ...
Page 5
ELECTRICAL CHARACTERISTICS data rate ( light source: 3200 K halogen lamp +C-500S (infrared cut filter 1mm), input signal clock = 5 V Parameter Symbol Saturation voltage V sat ...
Page 6
INPUT PIN CAPACITANCE ( Parameter Shift register clock pin capacitance 1 Shift register clock pin capacitance 2 Reset gate clock pin capacitance Transfer gate clock pin capacitance RGB select input pin capacitance RGB SELECT FUNCTION ...
Page 7
TIMING CHART 1-1 SEL1 SEL2 TG1 to a TG3 Note V OUT (Blue) Note Input the RB pluse continuously during this period, too. Optical black Valid photocell (2700 pixels) (48 pixels) Invalid photocell Invalid photocell (2 pixels) ...
Page 8
TIMING CHART 1-2 SEL1 SEL2 TG1 to b TG3 Note V OUT (Green) Input the RB pluse continuously during this period, too. Note Optical black Valid photocell (2700 pixels) (48 pixels) Invalid photocell Invalid photocell (2 pixels) ...
Page 9
TIMING CHART 1-3 SEL1 SEL2 TG1 to c TG3 Note V OUT (Red) Input the RB pluse continuously during this period, too. Note Optical black Valid photocell (2700 pixels) (48 pixels) Invalid photocell Invalid photocell (2 pixels) ...
Page 10
TIMING CHART 2 (for each color OUT TG1 to TG3 TIMING CHART TG1 to TG3 1 2 Symbol t1 t5 t8, t9 ...
Page 11
APPLICATION TIMING EXAMPLE (for reference) The PD3794 can be operated under the following timing to switch Red, Green, and Blue outputs and get each color data in a 1-pixel period. However the offset level of each color is not the ...
Page 12
DEFINITIONS OF CHARACTERISTIC ITEMS 1. Saturation voltage: V sat Output signal voltage at which the response linearity is lost. 2. Saturation exposure: SE Product of intensity of illumination (I 3. Photo response non-uniformity: PRNU The output signal non-uniformity of all ...
Page 13
Output impedance Impedance of the output pins viewed from outside. 7. Response: R Output voltage divided by exposure (Ix•s). Note that the response varies with a light source (spectral characteristic). 8. Image Lag: IL The rate between ...
Page 14
STANDARD CHARACTERISTIC CURVES DARK OUTPUT TEMPERATURE CHARACTERISTIC 0.5 0.25 0 Operating Ambient Temperature T TOTAL SPECTRAL RESPONSE CHARACTERISTICS 100 400 500 14 STORAGE TIME OUTPUT ...
Page 15
APPLICATION CIRCUIT EXAMPLE + F/ Remark Inverters: 74HC04 PD3794 SEL1 OUT 2 21 GND SEL2 ...
Page 16
PACKAGE DRAWING CCD LINEAR IMAGE SENSOR 22PIN PLASTIC DIP (400 mil) (Unit : mm) 1st valid pixel 3.95±0.3 3 37.5 44.0±0.3 1.02±0.15 0.46±0.1 25.4 16 (5.42) 2.54 4.21±0.5 4.39±0.4 Name Dimensions Plastic cap 42.9 x 8.35 x 0.7 1 The ...
Page 17
RECOMMENDED SOLDERING CONDITIONS When soldering this product highly recommended to observe the conditions as shown below. If other soldering processes are used the soldering is performed under different conditions, please make sure to consult with our ...
Page 18
NOTES ON CLEANING THE PLASTIC CAP 1 CLEANING THE PLASTIC CAP Care should be taken when cleaning the surface to prevent scratches. The optical characteristics of the CCD will be degraded if the cap is scratched during cleaning. We recommend ...
Page 19
... Similar precautions need to be taken for PW boards with semiconductor devices on it. 2 HANDLING OF UNUSED INPUT PINS FOR CMOS Note: No connection for CMOS device inputs can be cause of malfunction connection is provided to the input pins possible that an internal input level may be generated due to noise, etc., hence causing malfunction. CMOS device behave differently than Bipolar or NMOS devices ...
Page 20
... Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems or medical equipment for life support, etc. The quality grade of NEC devices is "Standard" unless otherwise specified in NEC's Data Sheets or Data Books. If customers intend to use NEC devices for applications other than those specified for Standard quality grade, they should contact an NEC sales representative in advance ...