STV5712 Fast Delivery |IC PHOENIX CO.,LIMITED

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STV5712
ADVANCED FM AUDIO PLAY-BACK AND RECORD AMPLIFIER FOR VCR
STV5712
ADVANCED FM AUDIO PLAY-BACK
AND RECORD AMPLIFIER FOR VCR
April 1996
SO16 NARROW
(Plastic Micropackage)
ORDER CODE: STV5712
PLAY-BACK MODE. LOW NOISE 68dB AMPLIFIERS FOR HEADS. AUTOMATIC OFFSET CANCELLATION
BETWEEN THE2 SELECTEDHEADS. ONE PLAY-BACKOUTPUT. MODE SELECTION BY LOGIC INPUT
RECORD MODE. ONE INTEGRATED I/I CONVERTER WITH
ACCURATE CONTROL OF TRANSCON-
DUCTANCE. RECORD AMPLIFIER WITH AUTOMATIC
PROTECTION AGAINST SHORT CIRCUIT. 5V SUPPLY VOLTAGE
GND1 OUT
GND2
PROT RECHCC
OUT
MES
5712-01.EPS
PIN CONNECTIONS
DESCRIPTION
The STV5712isan advanced two head FM audio
record and play-back amplifierfor VCR.
1/8
10 23 4 5 781213141516 IOUT
GND2 PROT V
MES
REC H2
GND1 C1
OUT
5712-02.EPS
BLOCK DIAGRAM
FUNCTIONAL DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VCC Power Supply Voltage 6 V Junction Temperature + 150 oC
5712-01.TBL
THERMAL DATA
Symbol Parameter Value Unit
Rth(j-a) Junction-ambient Thermal Resistance Typ. 100 o C/W
5712-02.TBL
STV5712is intended for2 heads FM audio VCR
applications.
Highperformancetechnologyallows very lownoise
levels (current and voltage).In play-back modea
special feature suppresses the DC offset when
switching two channels. Optimized play-back out-
put stagegivesto the STV5712 large capabilityto
directly drivea coaxial cablein orderto reduce
numberof external components.
Only one power supplyis necessaryfor play-back
and record modes. The mode can be chosen
througha logicinput. Aspecial carehas been taken avoid current peaks through the rotary trans-
formers.
During play-back mode, record outputis grounded
viaan internal transistor and during record mode
preamplifiers are turned off.
Thereis one output currentfor the two heads, the current and the AC characteristics canbe very
precisely controled with accurate external resis-
tors.If recommendedresistances are used,a ±5%
transconductanceaccuracyis guaranted.
The recording amplifier includesa protection sys-
tem which protectsthe ICand theapplication board
against overheatingin caseof short circuiton the
recording transconductancecomponents.
STV5712is fully protected against ESD.
STV5712
2/8
ELECTRICAL OPERATING CHARACTERISTICS (TA =25oC unless otherwise specified)
Power Consumption
Parameter Play-Back Record(1)
Typ. Max. Typ. Max.
VCC=5V 25mA 35mA 60mA 80mA
Note: 1. R1= 5.6Ω
5712-03.TBL
Play-back Mode
VCC= 5V, no loadon Pin VOUT
Symbol Parameter Test Conditions Min. Typ. Max. Unit
ICC1 Supply Current 25 35 mA
VCC Supply Voltage 4.75 5 5.25 V OUT
GPB Pre-amplification Gain Sinus wave 1.6MHz
400mVPPon output,
Inputon PinH1orH2 68 73 dB
ΔGPB Gain Differenceof Output Signalon
Pin FM OUT between Channel1
and Channel2
Sinus wave 1.6MHz
0.1mVPPon inputsH1orH2
1.2 dB Equivalent Input Voltage Noise
Level
Input groundedvia switching
transistoron Pins H1,H2
0.34 0.5 nV⁄√Hz Equivalent Input Current Noise Pins H1,H2 3.6 5.0 pA⁄√Hz
CRT Crosstalk Sinus wave 1.6MHz
100μVPP,All switches combinated
-45 -40 dB
FLCPB
FHCPB
Bandwidth Cut-off Frequency -3dB attenuation 50Ωin parallelon
the input
Low
High 8
0.1 MHz
MHz
CIN Input Capacitance Pins H1,H2 45 pF
RIN Pre-amplifier Input Resistance Pins
H1,H2 1.6MHz 600 Ω
ZPB Output Impedance DC 30 50 Ω
VDCPB DC LevelatPin FMOUT 1.8 2.4 3 V
ΔVDC Head Switch Offset 150 mV
SHPB1 Second Harmonic Sinus wave 1.6MHz
100μVPPon input 500Ω//100pF
-45 -40 dB
5712-04.TBL
STV5712
3/8
ELECTRICAL OPERATING CHARACTERISTICS (TA =25oC unless otherwise specified) (continued)
Record Mode
VCC= 5V, Load resistor 50Ωon Pin IOUT
Transconductancenetwork definedby: R1= 5.6Ω 1% Pins PROT/VMES= 1kΩ 1% Pins VMES/VIN= 750Ω 1% Pins VIN
Symbol Parameter Test Conditions Min. Typ. Max. Unit
ICC2 Current Supply VCC =5V 60 80 mA
IOUT
Imax Max. Record Current 70 mAPP
IBIAS Biasing Currentofthe record
amplifier 40 47 mA Transconductance VIN= 200mVPP 220 mA/V
ZOUT Output Resistance 7 100 kΩ
SHREC Second Harmonic Output Current 40mAPPat 1.6MHz -43 -38 dB
FLCREC
FHCREC
Bandwidth Cut-off Frequency -3dB attenuation
Output current 60mAPP
Low
High 5
0.1 MHz
MHz
Maximum Input Current Pin PROTonPin PROT 150 250 400 mA
Maximum Saturation Voltage Pin PROT
Input current 50mA 100 150 mV
Input Resistance Equivalent valueofR3 resistor 500 700 900 Ω
5712-05.TBL
Switching Levels
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VSWH1
Head Selection Pin SW
Head number1 (high level) 2.4 VCC V
VSWL1 Head number2 (low level) 0 1.5 V
ISWH1 Input current(high level) 20 50 μA
ISWL1 Output current (low level) 20 50 μA
VSWH2
Mode Selection Pin SW REC
Record mode (highlevel) 2.4 VCC V
VSWL2 Play-back mode (low level) 0 1.5 V
ISWH2 Input current(high level) 20 50 μA
ISWL2 Output current (low level) 20 50 μA
tON1
Selection Pin SW Transient
Response
Delay time selection ON (output
signalappearson Pin FM OUT)
250 500 ns
tOFF1 Delay time selection OFF (output
signaldisappearson PinFM OUT)
250 500 ns
tON2
Selection Pin SW REC
Transient Response
Delay time selection ON (output
signalappearson Pin IOUT)
440 μs
tOFF2 Delay time selection OFF (output
signalappearson Pin FM OUT)
1.3 10 ms
5712-06.TBL
STV5712
4/8
ELECTRICAL OPERATING CHARACTERISTICS (TA =25oC unless otherwise specified) (continued)
Power Supply
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VCC Positive Supply Voltage Pin VCC 4.75 5 5.25 V
SVR Supply Voltage Rejection 0.5mVPPon Pin VCC
75μVPPonPin H1,H2
Measurementon PinFM OUT 20 dB
5712-07.TBL
INPUT/OUTPUTS EQUIVALENT INTERNAL DIAGRAM
VCC
400Ω
7.5kΩ
5712-03.EPS
Pins: C1, C2
47kΩ
VCC
10kΩ
10kΩ
15kΩ
1kΩ
5712-04.EPS
Pin: SW
VCC
5pF
4kΩ
500Ω
75Ω 18Ω
1.5pF
5712-05.EPS
Pin: FM OUT
0.5pF
6pF
800ΩREC
5712-06.EPS
Pin: VMES
STV5712
5/8
INPUT/OUTPUTS EQUIVALENT INTERNAL DIAGRAM (continued)
VCC
750Ω 750Ω
6pF
5712-07.EPS
Pin: VINCC
5712-08.EPS
Pins: V1,V2
0V/5V
800Ω
5712-09.EPS
Pin: PROT
5712-10.EPS
Pin: VCCD
protection800Ω
2.8mA play-backMES
VCC 5V
5712-11.EPS
Pin: IOUT
2.1V
VCC
120kΩ
5712-12.EPS
Pins: H1, H2
STV5712
6/8

Partno	Mfg	Dc	Qty	Available	Descript
STV5712	STM	N/a	2433	avai	ADVANCED FM AUDIO PLAY-BACK AND RECORD AMPLIFIER FOR VCR
STV5712	ST	N/a	4601	avai	ADVANCED FM AUDIO PLAY-BACK AND RECORD AMPLIFIER FOR VCR