PAC7312 Datasheet, PDF (1/13 Pages) Pixart Imaging Inc. – VGA PC Camera Single-Chip with Audio

PAC7312
PAC7312 VGA PC Camera Single-Chip with Audio
General Description
The PAC7312 is a single chip with an embedded VGA CMOS image sensor and USB 1.1 interface. It has JPEG
image compression and image processing. The generic application is a PC camera. JPEG decoder and auto
exposure are performed by software in PC side. And the optical size is 1/4” which can easily be embedded in
LCD monitors, notebooks or PDA. It also provides high quality audio sampling function for sound recording. The
audio function complies with USB audio device class 1.0.
There are 4 IO-trapping pins with internal pull-low resistors. It is flexible for customers to set PID. It supports the
interface to a serial-EEPROM. When the EEPROM function is enabled, the internal control registers can be
power-up loaded from external EEPROM. This allows customization of VID, PID, product string.
Features
Key Specification
z VGA resolution, ~1/4”Lens
z Frame rate up to 30fps at following resolution format
Supply Voltage
5.0V ± 10%
„ VGA format (640x480) with JPEG compression
Resolution
640 (H) x 480 (V)
„ CIF format (352x288) with JPEG compression
„ QVGA format (320x240) with JPEG compression
Array Diagonal
4.48mm
„ QCIF format (176x144) without compression
Optical format
1/4“
„ QQVGA format (160x120) without compression
z RGB Bayer’s pattern raw data
Pixel Size
5.6um x 5.6um
„ Up to 3fps @VGA format (640x480)
Frame Rate
Up to 30fps
„ Up to 12fps @CIF format (352x288)
„ Up to 12fps @QVGA format (320x240)
System Clock
12MHz
„ Up to 30fps @QCIF format (176x144)
„ Up to 30fps @QQVGA format (160x120)
Color Filter
RGB Bayer Pattern
z Standard JPEG compression engine comply to ISO/IEC ^{Scan mode}
Progressive
10918-1(JPEG)
z AEC/AGC/AWB automatic
Sensitivity
z 4 IO-trapping pins to set USB PID
PGA gain
z Support USB suspend mode
z Support video data transfer through USB isochronous
S/N ratio
3.06 V/lux*sec
23.52dB (Max.)
>45dB
transfer
Power consumption 65mA
z Snapshot control through USB interrupt pipe
z USB Vendor ID, Product ID, device release number and
Package
48-pin PLCC / 37-pin CSP
the string descriptor index via a serial EEPROM
(93C46) or by metal mask
z Complete Universal Serial Bus^® spec V1.1
compatibility
z Built in 8bits mono audio ADC for audio recording
through microphone, 16KHZ sampling rate, 8/16bits
PCM format
z USB audio device class 1.0 compatibility
Ordering Information
Order number
Package Type
Package Size(mm)
PAC7312PE
PAC7312CS
48-pin PLCC
37-pin CSP
11.43 x 11.43
5.06 x 5.55
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: [e-mail]
V1.5 Oct. 2005