9

10

1

23

4

5

78

11

12

13

14

15

16

6

S

T

V

5

7

1

2

BLOCK DIAGRAM

FUNCTIONAL DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

Power Supply Voltage

6

V

Junction Temperature

+ 150

THERMAL DATA

Symbol

Parameter

Value

Unit

Junction-ambient Thermal Resistance

Typ.

100

STV5712 is intended for 2 heads FM audio VCR

applications.

High performance technologyallows 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.

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.

STV5712

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