參數(shù)資料
型號(hào)： BA7357
廠商： Rohm CO.,LTD.
英文描述： VIF / SIF signal processor
中文描述： 資料表格/ SIF信號(hào)處理器
文件頁數(shù)： 1/15頁
文件大小： 178K
代理商： BA7357
1
Video ICs
VIF / SIF signal processor
BA7357S
The BA7357S is a multi-format (M, B / G, D / K, and I) VIF / SIF signal processor for television and VCR applications.
It features a built-in sound-trap and band-pass filters, and employs a pulse-count audio detector that does not require
adjustment. This IC reduces external component requirements, and allows space savings.
Applications
TVs and VCRs
Features
1) Separate-carrier PLL with full synchronous detec-
tion. Excellent DG / DP, CS beat (920kHz) and
cross color. In addition, by pulling down the SIF
input (pin 9) it can be used as an intercarrier.
2) The IF AGC time constant is dual-layered to allow
faster speeds.
3) The variable-gain amplifier has excellent linearity to
ensure low distortion, and AGC variance and tem-
perature drift have been minimized.
4) Significant improvement in image quality through
use of a filter that reduces CS beat.
5) Built-in SOUND filter (4.5MHz SOUND Trap and
4.5MHz SOUND BPF).
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
10.5
1
1250
2
Power dissipation
The MODE switch can be used to switch the
SOUND filter frequency band to match the transmis-
sion format (M: 4.5, B / G: 5.5, I: 6.0, D / K:
6.5MHz).
6) The audio detector uses a pulse-counter detector
that does not require adjustment, eliminating the
need for a detector coil. Broad S-curve for multiplex
broadcast compatibility.
7) Use of pulse-counter detection and the built-in
SOUND filter means fewer pins, external compo-
nents and adjustment locations are required. The IC
is available in a 22-pin SDIP package and will
enable cost and space savings.
Recommended operating conditions (Ta = 25°C)
Parameter
Unit
V
CCMax.
V
Pd
Max.
mW
Topr
– 15 ~ + 70
°
C
Tstg
– 40 ~ + 150
°
C
V
P2Max.
10.5
V
Applied voltage
Operating temperature
Storage temperature
Pin 2 applied voltage
1 24
resistor connected between V
CC
and V
reg
.
2 Reduced by 10mW for each increase in Ta 1
°
C over 25
°
C.
Symbol
Limits
8.8 ~ 9.2
1
11.7 ~ 12.3
2
Unit
V
V
8.5 ~ 9.5
1
V
CC9V
V
CC12V
V
CC
V
Power supply voltage (9V)
Power supply voltage (12V)
Guaranteed operating power
supply voltage
1 24
resistor connected between V
CC
and V
reg.
2 56
resistor connected between V
CC
and V
reg.
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