參數(shù)資料
型號(hào)： AD721JP
廠商： ANALOG DEVICES INC
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： ECONOLINE: REC2.2-S_DR/H1 - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- UL94V-0 Package Material- Continuous Short Circiut Protection- Internal SMD design- 100% Burned In- Efficiency to 75%
中文描述： COLOR SIGNAL ENCODER, PQCC28
封裝： PLASTIC, LCC-28
文件頁(yè)數(shù)： 3/8頁(yè)
文件大?。?/td> 146K
代理商： AD721JP
AD720/AD721
REV. 0
–3–
PIN DE SCRIPT IONS
Pin Mnemonic*
Description*
1
2
3
4
5
(NC) GOUT
(NC) APOS
(NC) ROUT
AGND
ENCD
(No Connection) Green Bypass Buffer
(No Connection) Analog Positive Supply; +5 V
±
5%
(No Connection) Red Bypass Buffer
Analog Ground Connection
A Logical High Enables the NT SC/PAL Encode
Mode (A Logical Low Powers Down the Chip)
A Logical Low Enables the RGB Bypass Mode
Red Component Video Input
0 mV to 714 mV for NT SC
0 mV to 700 mV for PAL
Analog Ground Connection
Green Component Video Input
0 mV to 714 mV for NT SC
0 mV to 700 mV for PAL
Analog Ground Connection
Blue Component Video Input
0 mV to 714 mV for NT SC
0 mV to 700 mV for PAL
A Logical High Input Selects NT SC Encoding
A Logical Low Input Selects PAL Encoding
CMOS Logic Levels
Analog Ground Connection
Chrominance Output; Subcarrier Only**
572 mV Peak-to-Peak for NT SC
600 mV Peak-to-Peak for PAL
Analog Positive Supply; +5 V
±
5%
Composite Video Output**
–572 mV to 2 V for NT SC
–600 mV to 2 V for PAL
Analog Positive Supply; +5 V
±
5%
Luminance Plus SYNC Output**
–572 mV to 1.43 V for NT SC
–600 mV to 1.4 V for PAL
System Negative Supply; –5 V
±
5%
Digital Ground Connection
Clock Input at Four T imes the Subcarrier Frequency
14.318 180 MHz for NT SC
17.734 480 MHz for PAL
CMOS Logic Levels
Digital Positive Supply; +5 V
±
5%
A Logical High Input Resets the Subcarrier Phase
Every Frame
A Logical Low Input Resets the Subcarrier Phase
Every Fourth Frame
CMOS Logic Levels
Digital Positive Supply; +5 V
±
5%
Input for Composite T elevision
Synchronization Pulses
Negative Sync Pulses
CMOS Logic Levels
Digital Ground Connections (One of T wo)
System Negative Supply; –5 V
±
5%
(No Connection) Blue Bypass Buffer
Analog Positive Supply; +5 V
±
5%
6
RDIN
7
8
AGND
GRIN
9
AGND
BLIN
10
11
ST ND
12
13
AGND
CRMA
14
15
APOS
CMPS
16
17
APOS
LUMA
18
19
20
VNEG
DGND
4FSC
21
22
DPOS
ASNC
23
24
DPOS
SYNC
25
26
27
28
DGND
VNEG
(NC) BOUT
APOS
*( ) pertain only to AD720.
**T he luminance, chrominance, and composite outputs are at twice normal
levels for driving 75
reverse-terminated lines.
ORDE RING GUIDE
T emperature
Range
Package
Option
Model
Package
AD720JP
AD721JP
0
°
C to +70
°
C
0
°
C to +70
°
C
28-Pin PLCC
28-Pin PLCC
P-28A
P-28A
PIN CONNE CT IONS
28-Lead Plastic Leaded Chip Carrier (PLCC) Package
P-28A
AD720/AD721
RGB TO NTSC/PAL
ENCODER
5
6
7
8
9
10
11
28
27
26
1
2
3
4
25
24
23
22
21
20
19
12
13
14
15
16
17
18
DGND
SYNC
DPOS
ASNC
DPOS
4FSC
DGND
ENCD
RDIN
AGND
GRIN
AGND
BLIN
STND
A
R
A
G
A
B
V
A
C
A
C
L
V
A
NOTE:
CONNECTIONS IN ( ) PERTAIN ONLY TO AD720
ABSOLUT E MAX IMUM RAT INGS*
Supply Voltage
±
V
S
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
6 V
Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . . . 600 mW
Operating T emperature Range . . . . . . . . . . . . . . 0
°
C to +70
°
C
Storage T emperature Range . . . . . . . . . . . . –65
°
C to +150
°
C
Lead T emperature, Soldering 60 sec . . . . . . . . . . . . . . +300
°
C
NOT E
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. T his is a stress rating only, and functional
operation of the device at these or any other conditions above those indicated in the
operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended rating conditions for extended periods
may affect device reliability.
T hermal characteristics: 28-pin plastic package:
θ
JA
= 100
°
C.
WARNING!
ESD SENSITIVE DEVICE
C AUT ION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD720/AD721 features proprietary ESD protection circuitry, permanent damage
may occur on devices subjected to high energy electrostatic discharges. T herefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
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