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PDF PAC207BCA Data sheet ( Hoja de datos )
| Número de pieza | PAC207BCA | |
| Descripción | SINGLE-CHIP CIF CMOS IMAGE SENSOR | |
| Fabricantes | PixArt | |
| Logotipo |  |
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PAC207BCA
PAC207B SINGLE-CHIP CIF CMOS IMAGE SENSOR
WITH USB INTERFACE
1. GENERAL DESCRIPTION
The PAC207B is a single chip CMOS image sensor embedded with an USB 1.1 interface and image
compression function. The PAC207B is suitable for low-cost high performance PC camera
applications. It integrates on-chip power regulators to transfer the 5V voltage from USB host power to
proper voltage levels to supply the CMOS sensor and analog and digital circuitry. Hence there is no
need to have external power regulator on the PCB. All the image processing functions, interpolation,
auto exposure, auto white balance, de-flickering and sharpness, are performed by software in PC side.
The optical size is 1/7”, which can easily be embedded into LCD monitors, notebooks or PDA.
Key Specification of Electrical and Optics
Power supply: +5V (Default)
Sensor array: 352 x 288.
Frame rate: up to 30fps.
Pixel Size: 5.6um x 5.6um.
Crystal frequency: 12MHz(Default)
S/N ratio: 35dB.
Power consumption: < 25mA.
PGA gain: 31.6 dB max
Sensitivity: 190 Level/lux-sec (Green pixel)
Exposure time: frame time ~ 1/160000
Optical format: 1/7“
Color filter: RGB Bayer Pattern
Scan mode: Progressive
Package: 32-pin LCC
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
1
PixArt Imaging Inc. E-mail: [email protected]
V1.2, July. 2003
1 page  
PixArt Imaging Inc.
PAC207BCA
Single-Chip CIF CMOS Image sensor with USB
5. FUNCTIONAL DESCRIPTION
5.1 ANALOG DATA PATH
PAC207B embedded a high quality CMOS image sensor with Pixart advanced sensor
structure. With correlated-double-sampling (CDS) circuit, it cancelled the column-wise fixed
pattern noise (FPN) and pixel mismatch at sensing node for each pixel. Hence PAC207B can
deliever a clean image quality.
With a progressive scanning timing, the analog pixel signal is transferred into “Front-Gain”
stage. Then transferred the pre-amplifier analog signal into programmable gain amplifier
(PGA). Then ADC will convert the analog signal into a 10 bit digital code.
The gain stage can be set by digital register setting, please refer to the following equation to
get the mapping gain.
Front Gain = 2+(n/2),
Color Gain = 1+(m/8),
Global Gain = 1+(q/10),
n = 0, 1, 2, 3
m= 0, 1, 2, …15
q = 0, 1, 2, …31
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
5
PixArt Imaging Inc. E-mail: [email protected]
V1.3, June. 2004
5 Page 
PixArt Imaging Inc.
PAC207BCA
Single-Chip CIF CMOS Image sensor with USB
8. Reference Application Circuit
U1
VSSQ
VSSQ
VDDQ
VSSA
VDDM
VDD2p5
KEY#
13 XTAL_SEL0
14
EPR_EnH
15 IOTrap_EnL
16
EPR_CS
17 VSSA
18 VDDM
19 VDD2p5
20 KEY#
PAC207BCA-32
VRT 4 VRT
3 VCM
VCM
VRB 2 VRB
1 VSSA
VSSA
VDDM 32 VDDM
VDDA 31 VDDA
VDDD 30 VDDD
VDDP 29 VDDP
VDDQ
R3
1.5k
R5 27 ohm
DP
DN
R6 27 ohm C18
20pF
C14
0.1uF
C19
20pF
1
R4
VDDM 1
L5
2
0ohm
2
5
4
3
GND2
GND1
2+
1
-
+5V
MLB-201209-1000R-S2
USB Connector & Circuit
CON1
MINI USB 5P
VDDM
C1 10uF
C2 0.1uF
VDDA
C3 10uF
C4 0.1uF
VDDD
C6 1uF
VDDP
C8 1uF
VDDQ
C9 10uF
C10 0.1uF
C11 1uF
VDD2p5
C12 0.1uF
VDDAY1
C13 1uF
VDDAY2
VRT
VRB
C15 1uF
C16
C17 1uF
1uF
VCM
C20 1uF
Bypass Caps.
LED
R1
1k
D1
LED-0603
VSSQ
XTAL_OUT
Y1
12MHz
XTAL_IN
C5 10pF
C7 10pF
VDDQ
R2 51k
C21 1uF
RST# 2
1
KEY#
U2 KEY
VSSQ
L1 3.3uH
VSSA
L2 3.3uH
VSSAY
Title
Size
B
Date:
PAC207BCA-32 PC-Cam Demo Board Schematic (Use Default Setting)
Document Number
By Charles / PixArt Imaging Inc.
Rev
V2.2
Monday, June 14, 2004
Sheet 2 of 2
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
11
PixArt Imaging Inc. E-mail: [email protected]
V1.3, June. 2004
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet PAC207BCA.PDF ] | |
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