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STV5712
ADVANCED FM AUDIO PLAY-BACK AND RECORD AMPLIFIER FOR VCR
RECORD MODE ONE INTEGRATED I/I CONVERTER WITH ACCURATE CONTROL OF TRANSCONDUCTANCE RECORD AMPLIFIER WITH AUTOMATIC PROTECTION AGAINST SHORT CIRCUIT 5V SUPPLY VOLTAGE
. . . . . . .
PLAY-BACK MODE LOW NOISE 68dB AMPLIFIERS FOR 2 HEADS AUTOMATIC OFFSET CANCELLATION BETWEEN THE 2 SELECTED HEADS ONE PLAY-BACK OUTPUT MODE SELECTION BY LOGIC INPUT
SO16 NARROW (Plastic Micropackage) ORDER CODE : STV5712
DESCRIPTION The STV5712 is an advanced two head FM audio record and play-back amplifier for VCR. PIN CONNECTIONS
VCC V2 C2 H2 GND1 H1 C1 FM OUT
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
V1 I OUT GND2 PROT V MES V IN SW REC SW H
5712-01.EPS
April 1996
1/8
STV5712
BLOCK DIAGRAM
SW REC GND2 SW H 9 PROT
VMES
IOUT
16
15
14
13
12
11
VIN
V1
10
S T V 5 7 1 2
1 VCC
2 V2
3 C2
4 H2
5 GND1
6 H1
7 C1
8 FM OUT
5712-02.EPS
FUNCTIONAL DESCRIPTION STV5712 is intended for 2 heads FM audio VCR applications. High performancetechnologyallows 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 output 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 transformers. ABSOLUTE MAXIMUM RATINGS
VCC TJ Power Supply Voltage Junction Temperature 6 + 150 V
o
5712-01.TBL 5712-02.TBL
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 resistors. If recommended resistances are used, a 5% transconductance accuracy is guaranted. The recording amplifier includes a protection system 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.
Symbol
Parameter
Value
Unit C
THERMAL DATA
Symbol R th (j-a) Parameter Junction-ambient Thermal Resistance Typ. Value 100 Unit
o
C/W
2/8
STV5712
ELECTRICAL OPERATING CHARACTERISTICS (TA = 25oC unless otherwise specified) Power Consumption
Typ. 25mA Max. 35mA Typ. 60mA Max. 80mA
5712-03.TBL
Parameter VCC = 5V
Note : 1. R1 = 5.6
Play-Back
Record (1)
Play-back Mode VCC = 5V, no load on Pin VOUT
Symbol ICC1 VCC FM OUT GPB GPB Pre-amplification Gain Sinus wave 1.6MHz 400mVPP on output, Input on Pin H1 or H2 Sinus wave 1.6MHz 0.1mVPP on inputs H1 or H2 Input grounded via switching transistor on Pins H1, H2 Pins H1, H2 Sinus wave 1.6MHz 100VPP, All switches combinated -3dB attenuation 50 in parallel on the input Low High At 1.6MHz DC 1.8 Sinus wave 1.6MHz 100VPP on input 500//100pF 0.34 3.6 -45 63 68 73 dB Parameter Supply Current Supply Voltage 4.75 Test Conditions Min. Typ. Max. 25 5 35 5.25 Unit mA V
Gain Difference of Output Signal on Pin FM OUT between Channel 1 and Channel 2 Equivalent Input Voltage Noise Level Equivalent Input Current Noise Crosstalk Bandwidth Cut-off Frequency
1.2
dB nV Hz pA Hz dB
eN iN CRT
0.5 5.0 -40
FLCPB FHCPB CIN RIN ZPB VDCPB VDC SH PB1 Input Capacitance Pins H1, H2 Pre-amplifier Input Resistance Pins H1, H2 Output Impedance DC Level at Pin FMOUT Head Switch Offset Second Harmonic
0.1 8 45 600 30 2.4 -45 50 3 150 -40
MHz MHz pF V dB
5712-04.TBL
mV
3/8
STV5712
ELECTRICAL OPERATING CHARACTERISTICS (TA = 25oC unless otherwise specified) (continued) Record Mode VCC = 5V, Load resistor 50 on Pin IOUT Transconductance network defined by : R1 = 5.6 1% Pins PROT/VMES R2 = 1k 1% Pins VMES/VIN R3 = 750 1% Pins VIN
Symbol ICC2 IOUT Imax IBIAS TR ZOUT SH REC Max. Record Current Biasing Current of the record amplifier Transconductance Output Resistance Second Harmonic Bandwidth Cut-off Frequency FLCREC FHCREC Maximum Input Current on Pin PROT Maximum Saturation Voltage on Pin PROT Input Resistance Output Current 40mAPP at 1.6MHz -3dB attenuation Output current 60mAPP Low High 5V on Pin PROT Input current 50mA Equivalent value of R3 resistor 500 VIN = 200mVPP 7 33 70 40 220 100 -43 -38 47 mAPP mA mA/V k dB Parameter Current Supply Test Conditions VCC = 5V Min. Typ. 60 Max. 80 Unit mA
0.1 5 150 250 100 700 400 150 900
MHz MHz mA
5712-05.TBL 5712-06.TBL
mV
Switching Levels
Symbol VSWH1 VSWL1 ISWH1 ISWL1 VSWH2 VSWL2 ISWH2 ISWL2 tON1 tOFF1 tON2 tOFF2 Selection Pin SW REC Transient Response Selection Pin SW Transient Response Mode Selection Pin SW REC Head Selection Pin SW Parameter Test Conditions Head number 1 (high level) Head number 2 (low level) Input current (high level) Output current (low level) Record mode (high level) Play-back mode (low level) Input current (high level) Output current (low level) Delay time selection ON (output signal appears on Pin FM OUT) Delay time selection OFF (output signal disappears on Pin FM OUT) Delay time selection ON (output signal appears on Pin IOUT) Delay time selection OFF (output signal appears on Pin FM OUT) 2.4 0 20 20 250 250 4
1.3
Min. 2.4 0
Typ.
Max. VCC 1.5
Unit V V A A V V A A ns ns s ms
20 20
50 50 VCC 1.5 50 50 500 500 40 10
4/8
STV5712
ELECTRICAL OPERATING CHARACTERISTICS (TA = 25oC unless otherwise specified) (continued) Power Supply
Symbol VCC SVR Parameter Positive Supply Voltage Pin VCC Supply Voltage Rejection 0.5mVPP on Pin VCC 75VPP on Pin H1, H2 Measurement on Pin FM OUT Test Conditions Min. 4.75 15 Typ. 5 20 Max. 5.25 Unit V dB
5712-07.TBL
INPUT/OUTPUTS EQUIVALENT INTERNAL DIAGRAM Pins : C1, C2 Pin : SW
VCC
VCC 7.5k
10k
15k
47k
10k
400
5712-03.EPS
Pin : FM OUT
VCC 4k 5pF
Pin : VMES
VREC
800
1.5pF 500
0.5pF
6pF
5712-05.EPS 5712-06.EPS
75
18
5/8
5712-04.EPS
1k
STV5712
INPUT/OUTPUTS EQUIVALENT INTERNAL DIAGRAM (continued) Pin : VIN Pin s : V1, V2
VCC
VCC
750
750 6pF
V1
5712-07.EPS 5712-08.EPS
Pin : PROT
Pin : VCC
0V/5V
800
5712-09.EPS
Pin : IOUT
VCC 5 V ES D prote ction
Pins : H1, H2
VCC
800
12 0k
2.1V 2.8m A in play-ba ck
5712-11.EPS
H1 H2
5712-12.EPS
VMES
6/8
5712-10.EPS
STV5712
APPLICATION DIAGRAM
VIN
R3 750
C7 22nF
R1 5.6
R2 1k
SW-REC
R4 10k
SW-H
16
I1 1
15
14
13
12
11
10
9
I1 2
S T V 5 7 1 2
C8 1nF
GND
1
2 C2 22nF
3
4
5 C4 C3 22nF 22nF
6
7
8 C1 22nF
FM OUT
L1 22H
VCC
C6 22nF
C5 22F
7/8
5712-13.EPS
STV5712
PACKAGE MECHANICAL DATA 16 PINS - PLASTIC MICROPACKAGE (SO NARROW)
Dimensions A a1 a2 b b1 C c1 D E e e3 F L M S
Min. 0.1 0.35 0.19
Millimeters Typ.
Max. 1.75 0.25 1.6 0.46 0.25 45o (typ.)
Min. 0.004 0.014 0.007
Inches Typ.
Max. 0.069 0.009 0.063 0.018 0.010
0.5 9.8 5.8 1.27 8.89 3.8 0.4 4.0 1.27 0.62 8 (Max.)
o
0.020 10 6.2 0.386 0.228 0.050 0.350 0.150 0.016 0.157 0.050 0.024 0.394 0.244
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without noti ce. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1996 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
8/8
SO16N.TBL
PM-SO16N.EPS

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