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STV5715
ADVANCED 2-HEAD PLAY-BACK AND RECORD AMPLIFIER FOR VCR
STV5715ADVANCED 2-HEAD
PLAY-BACK AND RECORD AMPLIFIER FOR VCR
SO20 LARGE(Plastic Micropackage)
ORDER CODE: STV5715
PLAY-BACK MODE. LOW NOISE AND WIDE BAND AMPLIFIERS
FOR2 HEADS. AUTOMATIC OFFSET CANCELLATION BE-
TWEEN THE2 SELECTED HEADS. ONE PLAY-BACK OUTPUT WITHOUT AGC. ONE PLAY-BACK OUTPUT INCLUDING AGC. RECORD AMPLIFIER INHIBITION AND RE-
CORD OUTPUT GROUNDED. OUTPUT FOR TRACKING VIDEO INFORMA-
TION (TRIV) WITH ADJUSTABLE GAIN
RECORD MODE. ONE INTEGRATED I/I CONVERTER WITH
ACCURATE CONTROL OF TRANSCONDUC-
TANCE. AUTOMATIC PLAY-BACK/RECORD SWITCH-
ING BY SCANNING OF RECORD SUPPLY. PLAY -BACK LOOPINHIBITION
GND1
CCAS
GND2
CAGC
GND3
TRIVADJ
VMESMH
CHROMA
VIN
LUMA
VCC
TRIV
RECV
OUTI
PIN DESCRIPTION
DESCRIPTION
121314151617181920TRIVADJ
LSPH SWM HLP 234 5678 10
GND3 TRIVADJ V
MES
CHROMA V
LUMA V
TRIV
ND1
CCAS
GND2 C2 C1
CAGC
REC
OUT
STV57155715-02.EPS
BLOCK DIAGRAM
FUNCTIONAL DESCRIPTIONSTV5715isintendedfor2 headsVCR applications. includesall the electricalfunctions necessaryto
achieve play-back and record processingfor VHS
and S-VHS applications(10MHz bandwidth).
High performancetechnologyallowsvery lownoise
levels (current and voltage), which are frequency
independantin all the frequency range.In play-
back modea special feature suppresses the DC
offset when switching the two channels.Optimized
play-back output stage givesto the STV5715 large
capabilityto drive directlya coaxial cablein order reduce numberof external components.
Two play-back outputs are availabe: one, dedi-
catedto Chroma processing,isa 60dB voltage
amplifier output,the other, dedicatedto Lumaproc-
essing,is phase oppositesignal witha constantAC
output levelof 200mVPPat 3.8MHz signal. tracking information for video signal (TRIV)is
Luma amplitude proportional and allows automatic
phase correction. The transfer function hasa gain 2.5dB higher whena LP channelis selected.
Addingto this,a gain control bloc allowsto modify
the gain(± 6dB)of the TRIV function forall the
channelsby applyinga biason pin TRIVADJ. automatic scanningof record supply voltage
permits STV5715 automatically switching eitherin
play-backorin record mode. The switching thresh-
old voltageis fixedtoa value which forbids high
current peaking through the heads.
During play-back mode, record outputis grounded
viaan internal transistor and during record mode
preamplifiers are turned off.
Thereis one output current for two recording
heads, the DC current and the AC characteristics
canbe very precisely controlled with accurate ex-
ternal resistors.If recommended resistances are
used,a± 3% transconductanceaccuracyis guar-
anteed.
STV5715is fully protected against ESD.
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value UnitVCC Power Supply Voltage 6 V
VREC Power Supply Voltage Record 15 V
STV5715
THERMAL DATA
Symbol Parameter Value UnitRth(j-a) Junction-ambient Thermal Resistance Typ. 70 o C/W
5715-02.TBL
RECOMMENDED OPERATING CONDITIONS (Tamb =25oC)
Symbol Parameter Min. Typ. Max. UnitVCC Power Supply Voltage 4.5 5 5.5 V
VREC Power Supply Voltage Record 4.75 11.3 12.6 V
CAGC Capacitanceat Pin CAGC 4.7 nF
5715-03.TBL
ELECTRICAL OPERATING CHARACTERISTICS (Tamb =25oC unless otherwise specified)
Power Consumption
Parameter Play-Back Record(1)
Typ. Max. Typ. Max.VCC 42mA 52mA 25mA 38mA
VREC 0mA 0mA 25mA 33mA
Total
Consumption(2)
VCC =5V,VREC=9V 210mW 350mW
VCC= 5.5V,VREC= 9.45V 286mW 521mW
Notes:1. R1= 18Ω Takingin accountonlythe consumption throughtheIC. great care shouldbe takentothe maximum power consumption :VRECcanbe increasedto 12.6Vif theDC current flowing
throughthe head isreduced. Thiscanbe doneby increasingR1 value. VRECcanbe reducedas longas voltageonPin
IOUT doesnotfall below1V(to avoid output stage saturation).
5715-04.TBL
Play-back ModeVCC= 5V,no loadon Pins CHROMA,LUMA
Symbol Parameter Test Conditions Min. Typ. Max. UnitICC1 Supply Current 32 42 52 mA
CHROMA OUTPUT (no AGC)
GPB Pre-amplification Gain Sinewave 600 kHz, 400mVPPon output
Inputon PinH1orH2 59 62 dB
ΔGPB1 Differenceof Output Signalon
Pin CHROMA between Channel and Channel2
Sinewave 600kHz
0.4mVPPon inputsH1 andH2
-1.2 0 1.2 dB Equivalent Input Voltage Noise
Level
Input groundedvia switching transistor Pins H1, H2,f= 600kHz
0.6 nV⁄√Hz Equivalent Input Current Noise Pins H1,H2 1.7 pA⁄√Hz
CRT Crosstalk Sinewave 3.8MHz, 400μVPPon input,
Allthe other inputs loaded withRg =15Ω
-45 -40 dB
RPB Playback Switch-on Resistance ΔI= 10mA 2.0 5.0 Ω
FLCPB1
FHCPB1
Bandwidth Cut-off Frequency -3dB attenuation50Ωin parallelon the
input, 0dBat 600kHz
Low
High 8 13.5
0.1 MHz
MHz
CIN Input Capacitance Pins H1,H2 At 5MHz 30 40 pF
RIN Pre-amplifier Input Resistance
Pins H1,H2 3.8MHz 400 600 900 Ω
STV5715
ELECTRICAL OPERATING CHARACTERISTICS (Tamb =25oC unless otherwise specified) (continued)
Play-back ModeVCC= 5V,no loadon Pins CHROMA,LUMA
Symbol Parameter Test Conditions Min. Typ. Max. UnitCHROMA OUTPUT (no AGC) (continued)
VDCPB1 DC Levelat Play-back Output Pin CHROMA
1.5 1.9 2.3 V
ΔVDC Head Switch OffsetPin CHROMA -100 0 100 mV
SHPB1 Second Harmonic Play-back Output
Pin CHROMA
Sinewave 3.8MHz
400μVPPon input
-45 -40 dB
LUMA OUTPUT (with AGC)
ZLPB Output Impedance DC 30 50 Ω
VDCPB2 DC Level 1.1 1.5 2.1 V
FLCPB2
FHCPB2
Bandwidth Cut-off Frequency -3dB attenuation 50Ωin parallelonthe
input, AGC locked, 0dBat 3.8MHz
Low
High 10 12.5
0.1 MHz
MHz
VLPB Output Amplitude Input signal 200μVPPat 3.8MHzon Pins
H1,H2
140 200 270 mVPP
ΔVLPB AGC Control Sensitivity Input signal 200μVPPat +6dBor -5dBon
Pins H1,H2 +1 dB
SHPB2 Second Harmonic Play-back Output Input Signal 3.8MHz 400μVPPon Pins
H1,H2
-44 -39 dB
CAGC Positive Output Current Input Signal 3.8MHz 200μVPPonH1 15 30 50 μA Negative Output Current Input Signal 3.8MHz 200μVPPonH1 -50 -30 -15 μA
TRIV
ITRIV Downloading Current 200 300 400 μA
VTRIV1 Output Level(1) Withno signal, VTRIVADJ= 2.5V
ModeLP (SW-M= high)
0.3 0.6 1.5 V
VTRIV2 Output Level(2) VCHROMA= 100mVPPat 4MHz
VTRIVADJ= 2.5V,Mode LP(SW-M= high)
1.91 2.31 2.91 V
VTRIV3 Output Level(3) VCHROMA= 400mVPPat 4MHz
VTRIVADJ= 2.5V,Mode LP(SW-M= high)
3.525 3.725 3.985 V
VTRIV4 Output Level(4) VCHROMA= 100mVPPat 4MHz
VTRIVADJ=1V, ModeLP (SW-M= high)
1.110 1.610 2.311 V
VTRIV5 Output Level(5) VCHROMA= 100mVPPat 4MHz
VTRIVADJ=4V, ModeLP (SW-M= high)
2.875 3.075 3.335 V
VTRIV6 Output Level(6) VCHROMA= 400mVPPat 4MHz
VTRIVADJ= 2.5V,ModeSP (SW-M= low)
3.215 3.415 3.675 V
VTRIV7 Output Level(7) VCHROMA= 100mVPPat 4MHz
VTRIVADJ= 2.5V,ModeSP (SW-M= low)
1.65 2.05 2.65 V
fTRIV1 Response LowerFrequency VCHROMA= 400mVPPat 4MHz and 1MHz
VTRIVADJ= 2.5V,Mode LP(SW-M= high)
-10 -6 -3 dB
fTRIV2 Response Higher Frequency VCHROMA= 400mVPPat 8MHz and 4MHz
VTRIVADJ= 2.5V,Mode LP(SW-M= high)
-2.5 -1 -0 dB
GTRIV High Level Input LP: VCHROMA= 100mVPP, 300mVPPat
4MHz, VTRIVADJ= 2.5V 5.5 7 V/V
5715-06.TBL
STV5715
ELECTRICAL OPERATING CHARACTERISTICS (Tamb =25oC unless otherwise specified) (continued)
Record ModeVREC= 11.3V, VCC= 5V, Load resistor 50Ωon Pin IOUT
Transconductancenetwork definedby: R1= 18Ω, 1% Pins GND/VMES= 1.5kΩ, 1% Pins VMES/VIN= 1.5kΩ, 1% Pin VIN
Symbol Parameter Test Conditions Min. Typ. Max. UnitIREC
ICC2
Current Supply VREC= 11.3V
VCC =5V
Imax Max. Record Current 3.8MHz 35 mAPP Transconductance VIN= 300mVPP 45 55 65 mA/V
SHREC Second Harmonic Output Current, 30mAPPat 3.8MHz Pin IOUT -54 -38 dB
FLCR
FHCR
Bandwidth Cut-off Frequency Pin IOUT -3dB attenuation, 0dBat 3.8MHz
Output current 30mAPP
Low
High 10
0.1 MHz
MHz
RVIN Input Resistanceon PinVIN Equivalent valueofR3 resistor 500 700 900 Ω
5715-07.TBL
Switching Levels
Symbol Parameter Test Conditions Min. Typ. Max. UnitVSWHH
Head Selection Pin SW-H
Head number1 2.4 VCC V
VSWHL Head number2 0 1.5 V
ISWHH Input current (5V) 5 15 50 μA
ISWHL Output current (0V) -50 -20 0 μA
VSWMH
Mode Selection Pin SW-M Mode 2.4 5 V
VSWML SP mode 0 1.5 V
ISWMH Input current (5V) 5 15 50 μA
ISWML Output current (0V) -50 -20 0 μA
tON
tOFF
Selection Pin SW-H Transient
Response
Output signal appearson Pin CHROMA
Delay time selection ON
Delay time selection OFF
VTH1 Inhibition Threshold Hysteresisfor
Switching from Play-backto record Pin VREC
VCC=5V 0.15 0.3 0.5 V
VTH2 Inhibition Threshold Hysteresisfor
Switching from Recordto Play-back Pin VREC
VCC =5V 80 mV
Transient Responseof Record
Scanningon Pin VREC
Delay from play-backto record
(signal disappearson Pin CHROMA) μs Delay from recordto play-back
(signal appearson Pin CHROMA)
32* ms Delay from play-backto record (signal
appearson Pin IOUT)
0.2 ms Delay from recordto play-back(signal
disappearson Pin IOUT)
11* ms Dependingon capacitanceonPin VREC; above valuesare accordingtothe application diagram atpage9.
5715-08.TBL
STV5715
INPUT/OUTPUTS EQUIVALENT INTERNAL DIAGRAMCC
400Ω
7.5kΩ
5715-03.EPS
Pins: C1,C2
47kΩV
10kΩ
10kΩ
15kΩ
1kΩ
5715-04.EPS
Pins: SW-H, SW-MV
5pF
4kΩ
500Ω
75Ω 18Ω
1.5pF
5715-05.EPS
Pins: Chroma, Luma
0.5pF
6pF
800ΩREC
5715-06.EPS
Pin: VMESCC
750Ω 750Ω
6pF
Pin: VINCCCC
2.4V
Pin: CAGC
STV5715
