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參數(shù)資料
| 型號(hào)： | TDA4439 |
| 英文描述： | Video IF Amplifier for Multistandard TV and VTR |
| 中文描述： | 視頻中頻多標(biāo)準(zhǔn)電視和錄像機(jī)放大器 |
| 文件頁數(shù)： | 2/7頁 |
| 文件大?。?/td> | 105K |
| 代理商： | TDA4439 |
TELEFUNKEN Semiconductors
TDA4439
Rev. A1: 14.09.1995
2 (7)
Pin Description
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
95 10840
Pin
1, 18
2
Function
IF input
Standard switch:
open B/G
ground L
3, 17
4
5
6
7
Ground
IF-AGC storage capacitor
AGC (tuner control)
Tuner AGC take over
Polarity switch:
open AFC “DOWN”
ground AFC
“
UP
”
Demodulator circuit
AFC circuit
AFC output
Average capacitor standard L
Video output
Supply voltage
n.c.
8, 11
9, 10
12
13
14
15
16
Circuit Description
The following function units are integrated in this circuit combination for video-IF processing:
–
Three symmetric, highly stable, gain controlled wide-
band amplifier, quasi galvanic coupling eliminates
feed back
–
Video carrier controlled demodulator of high linearity
–
Polarity switch over for video and AFC-signal
–
Video output amplifier with low-pass characteristics,
limiter for ultra black and inverter for ultra white
interference
–
Disconnectable AFC
current output
generator with push pull
–
High impedance, interference free controlled voltage
facilities, best possible AGC time constant with small
storage capacitor
–
Controlled discharge circuit for fast gain control
–
With VTR
according to the ultra white level in B/G, ultra black
level in L
operation the video output level is
Absolute Maximum Ratings
Reference point pin 3, unless otherwise specified
Parameters
Symbol
V
S
I
S
V
5
V
4
V
14
I
4
Value
10 to 15
75
V
S
10
8
0.5
Unit
V
mA
V
V
V
mA
Supply voltage
Supply current
Open loop voltage
External voltage
Pin 15
Pin 15
Pin 5
Pin 4
Pin 14
Pin 4
Breaking current for VTR operation
Video output current
max load
short circuit max 1 s
Power dissipation
Junction temperature
Ambient temperature range
Storage temperature range
Pin 14
Pin 14
I
0
5
50
1.0
125
mA
T
amb
≤
60
°
C
P
tot
T
j
T
amb
T
stg
W
°
C
°
C
°
C
–25 to +70
–25 to +125
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA4443 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MULTISTANDARD VIDEO IF AMPLIFIER |
| TDA4445 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SOUND IF AMPLIFIER |
| TDA4445A | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Quasi Parallel Sound Processing with Quadrature Intercarrier Demodulator |
| TDA4445B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Quasi Parallel Sound Processing with Quadrature Intercarrier Demodulator |
| TDA4452 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Video IF Amplifier for Multistandard TV Receiver and VTR Appliances |
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