2002 National Semiconductor Corporation
www.national.com
ADVANCE INFORMATION
LM9638 Monochrome CMOS Image Sensor SXGA 18 FPS
General Description
The LM9638 is a high performance, low power, 1/2" SXGA
CMOS Active Pixel Sensor capable of capturing monochrome
still or motion images and converting them to a digital data
stream.
Mega-pixel class image quality is achieved by integrating a high
performance analog signal processor comprising of a high
speed 10 bit A/D convertor, fixed pattern noise elimination cir-
cuits and a programmable gain amplifier. The offset and black
level can be automatically adjusted on chip using a full loop
black level compensation circuit.
Furthermore, a programmable smart timing and control circuit
allowing the user maximum flexibility in adjusting integration
time, active window size, gain, frame rate. Various control, tim-
ing and power modes are also provided.
Features
f
Video and snapshot operation
f
Progressive scan read out with horizontal and vertical flip
f
Programmable Exposure:
- Master clock divider
- Inter row delay
- Inter frame delay
- Partial frame integration
f
Programmable gain amplifier
f
Full automatic servo loop for black level & offset adjustment
on each gain channel
f
Horizontal & vertical sub-sampling (2:1 & 4:2) with averaging
f
Windowing
f
Programmable pixel clock, inter-frame and inter-line delays
f
I
2
C compatible serial control interface
f
Power on reset & power down mode
Applications
f
Security Camera
f
Machine Vision
f
Barcode Scanner
f
Biometrics
Key Specifications
Array Format
Total: 1032 x 1312
Active: 1032 x 1288
Effective Image Area
Total: 6.30mm x 7.83mm
Active: 6.27mm x 7.81mm
Optical Format
1/2"
Pixel Size
6.0
μ
m x 6.0
μ
m
Video Outputs
8 & 10 Bit Digital
Frame Rate
18 frames per second
Dynamic Range
57 dB
Shutter
Rolling reset
FPN
0.5%
PRMU
1.7%
Sensitivity
2.40 volts/lux.s
Fill Factor
49%
Micro Lens
none
Package
48 LCC
Single Supply
3.0V +/- 10%
Power Consumption
150mW
-10
o
C to 50
o
C
Operating Temp
Overall Chip Block Diagram
Column CDS
H
R
D
F
B
C
Amp
d[9:0]
pclk
hsync
vsync
R
D
10 bit A/D
snapshot
extsync
APS Array
I
2
C Compatible
Serial I/F
Register
Bank
sclk
sda
sadr
POR
Power
Control
clk gen
mclk
pwd
resetb
Master Sensor Controller
+/-
L
May 2002