Datasheet STV5712 Datasheet (SGS Thomson Microelectronics)

AND RECORD AMPLIFIER FOR VCR

PLAY-BACK MODE

.

LOW NOISE 68dB AMPLIFIERS FOR
2 HEADS

.

AUTOMATIC OFFSET CANCELLATION
BETWEENTHE 2 SELECTEDHEADS

.

ONE PLAY-BACKOUTPUT

.

MODESELECTIONBY LOGIC INPUT

RECORDMODE

.

ONE INTEGRATED I/I CONVERTER WITH
ACCURATE CONTROL OF TRANSCON­DUCTANCE

.

RECORD AMPLIFIER WITH AUTOMATIC
PROTECTION AGAINST SHORTCIRCUIT

.

5V SUPPLYVOLTAGE

STV5712

ADVANCEDFM AUDIO PLAY-BACK

SO16 NARROW

(Plastic Micropackage)

ORDER CODE :STV5712

DESCRIPTION

The STV5712 is an advancedtwo head FM audio
recordand play-backamplifier for VCR.

PIN CONNECTIONS

1
2
3
4
5
6
7
8

April 1996

V

CC

V2
C2
H2

GND1

H1
C1

FM OUT

16
15
14
13
12
11
10

V1
I

OUT

GND2
PROT
V

MES

V

IN

SW REC

9

SW H

5712-01.EPS

1/8

STV5712

BLOCK DIAGRAM

OUT

V1

I

GND2

16

1

CC

V

14

15

234

V2

13

C2

FUNCTIONAL DESCRIPTION

STV5712 is intended for 2 heads FM audio VCR
applications.

Highperformancetechnologyallowsverylownoise
levels (current and voltage). In play-backmode a
special feature suppresses the DC offset when
switching two channels.Optimized play-backout­put stagegives to the STV5712largecapability to
directly drive a coaxial cable in order to reduce
number of externalcomponents.

Only onepower supplyis necessaryfor play-back
and record modes. The mode can be chosen
throughalogic input.Aspecialcarehasbeentaken
to avoid current peaks through the rotary trans­formers.

MESVIN

PROT

12

V

11

SW REC

SW H

910

S
T
V
5
7
1
2

5

6

78

H2

GND1

H1

C1

FM OUT

Duringplay-back mode,recordoutput is grounded
via an internaltransistor and during record mode
preamplifiersare turnedoff.

There is one output currentfor the two heads,the
DC current and the AC characteristicscanbe very
precisely controled with accurate external resis­tors.If recommendedresistancesare used,a±5%
transconductanceaccuracy is guaranted.

The recording amplifier includes a protectionsys­temwhichprotectstheICand theapplicationboard
against overheatingin case of short circuit on the
recording transconductancecomponents.

STV5712is fullyprotected against ESD.

5712-02.EPS

ABSOLUTEMAXIMUMRATINGS

Symbol Parameter Value Unit

V

CC

T

J

Power Supply Voltage 6 V
Junction Temperature + 150

THERMALDATA

Symbol Parameter Value Unit

Junction-ambient ThermalResistance Typ. 100

2/8

R

th (j-a)

o

C/W

o

C

5712-01.TBL

5712-02.TBL

STV5712

ELECTRICAL OPERATINGCHARACTERISTICS (TA=25oC unlessotherwisespecified)

Power Consumption

Parameter

= 5V 25mA 35mA 60mA 80mA

V

CC

Note : 1. R1 = 5.6Ω

Play-back Mode

=5V, no load on Pin V

V

CC

Symbol Parameter Test Conditions Min. Typ. Max. Unit

I
V

CC1

Supply Current 25 35 mA
Supply Voltage 4.75 5 5.25 V

CC

FM OUT

G

∆G

Pre-amplification Gain Sinus wave 1.6MHz

PB

Gain Difference of Output Signalon

PB

Pin FM OUT between Channel 1
and Channel 2

e

Equivalent Input VoltageNoise

N

Level

i

Equivalent Input Current Noise Pins H1, H2 3.6 5.0 pA ⁄√Hz

N

CRT Crosstalk Sinus wave 1.6MHz

Bandwidth Cut-off Frequency -3dB attenuation 50Ω in parallel on

F

LCPB

F

HCPB

Input Capacitance Pins H1, H2 45 pF

IN

Pre-amplifier Input Resistance Pins

IN

H1, H2
Output Impedance DC 30 50 Ω

PB

DC Level at Pin FMOUT 1.8 2.4 3 V
Head SwitchOffset 150 mV

DC

Second Harmonic Sinus wave 1.6MHz

PB1

V

∆V

SH

C
R

Z

DCPB

OUT

400mV
Input on Pin H1 or H2

on output,

PP

Sinus wave 1.6MHz

0.1mV

on inputs H1 or H2

PP

Input grounded via switching
transistor on Pins H1, H2

100µV

, All switches combinated

PP

the input

At 1.6MHz 600 Ω

100µV

on input 500Ω//100pF

PP

Play-Back Record (1)

Typ. Max. Typ. Max.

63 68 73 dB

1.2 dB

0.34 0.5 nV⁄√Hz

-45 -40 dB

Low

0.1 MHz

High 8

-45 -40 dB

5712-03.TBL

MHz

5712-04.TBL

3/8

STV5712

ELECTRICAL OPERATINGCHARACTERISTICS (TA=25oC unlessotherwisespecified)(continued)

Record Mode

=5V, Load resistor 50Ω on PinI

V

CC

Transconductancenetwork definedby : R1 =5.6Ω 1% Pins PROT/V

Symbol Parameter Test Conditions Min. Typ. Max. Unit

I

CC2

I

OUT

I

max

I

BIAS

TR Transconductance V

Z

OUT

SH

F

LCREC

F

HCREC

Current Supply VCC=5V 60 80 mA

Max. Record Current 70 mA
Biasing Current of the record

amplifier

Output Resistance 7 100 kΩ
Second Harmonic Output Current 40mAPPat1.6MHz -43 -38 dB

REC

Bandwidth Cut-off Frequency -3dB attenuation

Maximum Input Current
on Pin PROT

Maximum SaturationVoltage
on Pin PROT

Input Resistance Equivalent value of R3 resistor 500 700 900 Ω

OUT

MES

R2 =1kΩ 1% PinsV
R3 =750Ω 1% Pins V

MES/VIN
IN

33 40 47 mA

= 200mV

IN

PP

Output current 60mA

PP

Low

220 mA/V

High 5

5V on Pin PROT 150 250 400 mA

Input current 50mA 100 150 mV

0.1 MHz
MHz

PP

5712-05.TBL

SwitchingLevels

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

SWH1

V

SWL1

I

SWH1

I

SWL1

V

SWH2

V

SWL2

I

SWH2

I

SWL2

t

ON1

t

OFF1

t

ON2

t

OFF2

Head SelectionPin SW

Mode SelectionPin SW REC

Selection Pin SW Transient
Response

Selection Pin SW REC
Transient Response

Head number 1 (high level) 2.4 V

CC

Head number 2 (low level) 0 1.5 V
Input current (high level) 20 50 µA
Output current (low level) 20 50 µA
Record mode (high level) 2.4 V

CC

Play-back mode(low level) 0 1.5 V
Input current (high level) 20 50 µA
Output current (low level) 20 50 µA
Delay time selection ON (output

250 500 ns

signalappears on Pin FM OUT)
Delay time selection OFF (output

250 500 ns

signaldisappears on Pin FM OUT)
Delay time selection ON (output

signalappears on Pin I

OUT

)

Delay time selection OFF (output

440 µs

1.3 10 ms

signalappears on Pin FM OUT)

V

V

5712-06.TBL

4/8

STV5712

ELECTRICAL OPERATINGCHARACTERISTICS (TA=25oC unlessotherwisespecified)(continued)

Power Supply

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

SVR Supply Voltage Rejection 0.5mV

Positive Supply VoltagePin V

CC

CC

75µVPPon Pin H1, H2

on Pin V

PP

Measurement on Pin FM OUT

INPUT/OUTPUTS EQUIVALENT INTERNAL DIAGRAM

CC

4.75 5 5.25 V
15 20 dB

5712-07.TBL

Pins : C1, C2

Pin : FM OUT

4k

Ω

1.5pF

7.5k

400

Pin : SW

V

CC

15k

V

CC

10k

Ω

47k

Ω

Ω

1k

Ω

5712-03.EPS

Pin : V

MES

V

CC

5pF

500

Ω

800

Ω

0.5pF

Ω

Ω

10k

Ω

5712-04.EPS

V

REC

6pF

75

Ω

18

Ω

5712-05.EPS

5712-06.EPS

5/8

STV5712

INPUT/OUTPUTS EQUIVALENT INTERNAL DIAGRAM (continued)

Pin : V

IN

750

Ω

Pin : PROT

750

Pin s : V1,V

V

CC

Ω

6pF

2

V

CC

V1

5712-07.EPS

Pin : V

CC

5712-08.EPS

0V/5V

800

Ω

Pin : I

VCC5V

6/8

OUT

800

5712-09.EPS

5712-10.EPS

Pins : H1, H2

V

CC

120k

Ω

ES D

protection

2.8mA

in play-back

V

MES

5712-11.EPS

Ω

2.1V

H1
H2

5712-12.EPS

APPLICATIONDIAGRAM

R3
750

STV5712

V

IN

C7 22nF

Ω

R1

5.6

Ω

I

11

R2
1k

Ω

111213141516

910

R4 10k

C8
1nF

S

SW-REC

Ω

SW-H

T
V

5
7

I

12

1

234

C2

22nF

578

6

C3

C4
22nF

22nF

C1
22nF

C6
22nF

1
2

GND

FM
OUT

C5
22

µ

L1 22µH

F

V

CC

5712-13.EPS

7/8

STV5712

PACKAGE MECHANICAL DATA

16 PINS- PLASTICMICROPACKAGE (SO NARROW)

Dimensions

Min. Typ. Max. Min. Typ. Max.

A 1.75 0.069
a1 0.1 0.25 0.004 0.009
a2 1.6 0.063

b 0.35 0.46 0.014 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.020
c1 45

D 9.8 10 0.386 0.394

E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 8.89 0.350

F 3.8 4.0 0.150 0.157

L 0.4 1.27 0.016 0.050

M 0.62 0.024

S8

Millimeters Inches

o

(typ.)

o

(Max.)

PM-SO16N.EPS

SO16N.TBL

Informationfurnished is believed to be accurate and reliable. However,SGS-THOMSON Microelectronicsassumes no responsibility
for the consequences of use of such information nor for anyinfringement of patents or other rights of third partieswhich mayresult
from its use. No licenceis granted by implication orotherwise under any patent orpatent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
informationpreviously supplied. SGS-THOMSON Microelectronics products arenot authorizedfor use as critical components in life
support devicesor systems withoutexpress written approvalof SGS-THOMSON Microelectronics.

 1996 SGS-THOMSON Microelectronics -All Rights Reserved

Purchase of I

2

I

C Patent. Rights to usethese components in a I2C system,is granted provided that thesystem conforms to

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C Componentsof SGS-THOMSON Microelectronics,conveys a license under the Philips

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8/8