STV5712 데이터 시트보기 (PDF) - STMicroelectronics

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STV5712

ADVANCED FM AUDIO PLAY-BACK AND RECORD AMPLIFIER FOR VCR

STMicroelectronics 

STV5712

BLOCK DIAGRAM

16

15 14

13 12 11 10

9

S

T

V

5

7

1

2

1

2

3

4

5

6

7

8

FUNCTIONAL DESCRIPTION

STV5712 is intended for 2 heads FM audio VCR

applications.

High performancetechnologyallows very low noise

levels (current and voltage). In play-back mode a

special feature suppresses the DC offset when

switching two channels. Optimized play-back out-

put stage gives to the STV5712 large capability to

directly drive a coaxial cable in order to reduce

number of external components.

Only one power supply is necessary for play-back

and record modes. The mode can be chosen

through a logic input. Aspecial care has been taken

to avoid current peaks through the rotary trans-

formers.

ABSOLUTE MAXIMUM RATINGS

Symbol

VCC

TJ

Power Supply Voltage

Junction Temperature

Parameter

During play-back mode, record output is grounded

via an internal transistor and during record mode

preamplifiers are turned off.

There is one output current for the two heads, the

DC current and the AC characteristics can be very

precisely controled with accurate external resis-

tors. If recommended resistances are used, a ±5%

transconductance accuracy is guaranted.

The recording amplifier includes a protection sys-

tem which protects the IC and the application board

against overheating in case of short circuit on the

recording transconductancecomponents.

STV5712 is fully protected against ESD.

Value

Unit

6

V

+ 150

oC

THERMAL DATA

Symbol

Rth (j-a)

Parameter

Junction-ambient Thermal Resistance

Typ.

Value

100

Unit

oC/W

2/8

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