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STMicroelectronics Electronic Components Datasheet

STV5727 Datasheet

2-HEAD PLAYBACK AND RECORD AMPLIFIER

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STV5727
2-HEAD PLAYBACK AND RECORD AMPLIFIER FOR VCR
. ONE 5V POWER SUPPLY
. PLAYBACK/RECORD MODE SELECTION
THROUGH A LOGIC INPUT
. PINNING COMPATIBLE WITH STV5725 AND
STV5728
. SO14 PACKAGE
.....PLAYBACK MODE
LOW NOISE AND WIDE BAND AMPLIFIERS
AUTOMATIC OFFSET CANCELLATION
ONE PLAYBACK OUTPUT WITH AGC
ONE PLAYBACK OUTPUT (CONSTANT GAIN)
ONE OUTPUT FOR AUTOMATIC TRACKING
WITH GAIN SWITCH
.RECORD MODE
TRANSCONDUCTANCE AMPLIFIER
PRELIMINARY DATA
Record Mode
The current input applied on RECIN Pin is amplified
through a transconductanceamplifier. Special care
has been taken to speed up commutation from
Playback to Record and from Record to Playback,
avoiding spikes through the loads (the rotary trans-
formers).
SO14
(Plastic Micropackage)
ORDER CODE : STV5727
DESCRIPTION
STV5727 is intended for 2 heads VCR applications.
It includes all the electrical functions necessary to
achieve play-back and record processing for VHS
applications.
Record or Playback Mode can be selected through
SWR Pin.
Playback Mode
Signals applied on H1 and H2 input pins will be
amplified by 60dB voltage gain. IOUTSP Pin is AC
short-circuited to ground by CCOM. The input sig-
nal can be selected through SWIN Pin and the
correspondingoutput signal will be available on Pin
CPB. The offset voltage between the two heads is
automatically cancelled after 32 switching head
cycles. A constant output signal will be available on
Pin YPB thanks to an AGC function (Automatic
Gain Control). The time constant of the AGC is
determined by the capacitor value connected to
CAGC Pin. For Automatic Tracking, a signal which
is a function of the selected input signal amplitude
is present on Pin TRIV. According to the voltage
level on SWIN Pin, the triv gain can be change.
PIN CONNECTIONS
H1
GND1
H2
IOUTSP
CCOM
CAGC
TRIV
1
2
3
4
5
6
7
14
13
12
11
10
9
8
April 1996
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without no tice.
SWR
SWIN
VCC
RECIN
CPB
GND2
YPB
1/7


STMicroelectronics Electronic Components Datasheet

STV5727 Datasheet

2-HEAD PLAYBACK AND RECORD AMPLIFIER

No Preview Available !

STV5727
BLOCK DIAGRAM
H1 1
60dB
GND1 2
H2 3
IOUTSP 4
60dB
CCOM 5
CAGC 6
TRIV 7
De tector
S TV5727
REC
PB
H1
LP
H2
H1
SP
H2
R e c ord
Amp lifica tor
1 4 S WR
1 3 S WIN
1 2 VCC
1 1 RECIN
10 CP B
9 GND2
8 YP B
P layba ck
AGC
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Tj
Toper
Power Supply Voltage
Junction Temperature
Operating Temperature
Parameter
THERMAL DATA
Symbol
Rth (j-a)
Parameter
Junction-ambient Thermal Resistance
RECOMMENDED OPERATING CHARACTERISTICS
Symbol
VCC
CAGC
CCOM
Parameter
Power Supply
Capacitance on Pin CAGCREC
Decoupling Capacitor
Value
6
150
0, +70
Unit
V
oC
oC
Value
120
Unit
oC/W
Min.
4.75
4.7
4.7
Typ.
5
22
470
Max.
5.25
Unit
V
nF
nF
2/7


Part Number STV5727
Description 2-HEAD PLAYBACK AND RECORD AMPLIFIER
Maker STMicroelectronics
Total Page 7 Pages
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