BA7357

更新时间： 2024-11-18 22:39:23

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
15页	178K
描述
VIF / SIF signal processor

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BA7357 数据手册

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.

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.

3) The variable-gain amplifier has excellent linearity to

ensure low distortion, and AGC variance and tem-

perature drift have been minimized.

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.

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

V^CCMax.

Pd^Max.

Topr

Limits

10.5

Unit

Applied voltage

1250

Power dissipation

°C

Operating temperature

Storage temperature

Pin 2 applied voltage

– 15 ~ + 70

Tstg

– 40 ~ + 150

10.5

°C

V^P2Max.

1 24Ω resistor connected between VCC and Vreg.

2 Reduced by 10mW for each increase in Ta 1°C over 25°C.

Recommended operating conditions (Ta = 25°C)

•

Parameter

Symbol

VCC9V

Limits

Unit

Power supply voltage (9V)

Power supply voltage (12V)

8.8 ~ 9.2

VCC12V

11.7 ~ 12.3

Guaranteed operating power

supply voltage

VCC

8.5 ~ 9.5

1 24Ω resistor connected between VCC and Vreg.

2 56Ω resistor connected between VCC and Vreg.

12 3 4 5 6 7...15

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