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參數(shù)資料
| 型號： | MN86157 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 通信及網(wǎng)絡 |
| 英文描述： | Shading Correction LSI |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, PLASTIC, QFP-44 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 51K |
| 代理商： | MN86157 |
For Communications Equipment
MN86157
Shading Correction LSI
Overview
The MN86157 contains a 7-bit A/D converter for use
in correcting, at the bit level, shading distortion for sig-
nals from image sensors, optics, and similar sources.
It uses external RAM to support adaptive correction
that responds to changes in distortion patterns. It also uses
ROM to provide fixed correction when a white reference
plane signal is not available.
The chip is also usable as a stand-alone A/D converter.
Features
Choice of correction range (50% or 75%) depending
on extent of shading distortion
Parallel A/D converter functions
Resolution: 7 bits
Non-linearity:
±
1/2 LSB
Conversion speed: max. 5 MHz
Note: This is the guaranteed design value for the
chip used as a stand-alone A/D converter. The
guaranteed value at shipment is
±
3 LSB
Ability to start and stop clock in the middle of a line
to support CdS contacting image sensors and other
devices with variable scanning rates
Overflow pin that simplifies task of adding auto
background control (ABC) circuit
Single 5 volt power supply
Guaranteed TTL levels for input
Applications
Facsimile equipment
Pin Assignment
QFP044-P-1010
(TOP VIEW)
A5
A4
A3
A2
A1
A0
D0
D1
D2
D3
D4
D
D
R
M
O
D
D
D
D
D
D
A
A
A
A
A
A
N
M
E
C
E
SHST
R/W
INHI
V
SS
V
DD
N.C.
VREFL
VIN
VREFH
V
DD
OE
34
35
36
37
38
39
40
41
42
43
44
22
21
20
19
18
17
16
15
14
13
12
3
3
3
3
2
2
2
2
2
2
2
1
2
3
4
5
6
7
8
9
1
1
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