Document text
SYLVANIA
| ECG712
0 +ECLG TV/FM SOUND SYSTEM
semiconductors
4
@ DC VOLUME CONTROL ELIMINATES NEED
FOR SHIELDED CABLES
LF-INPUT [| | 14] AF- INPUT
TONE CONTROL
Ly
i]
; IF -INPUT [2] coeur
@ EXCELLENT AM REJECTION - 50dB TYPICAL cno. [3] 2] AF- OUTPUT
AT 4.5 MHz cno. [4] Tt] NC
i
| + Vcc [5 | HO] AF- BUFFER INPUT
e@ DIFFERENTIAL PEAK DETECTOR REQUIRES
ONLY ONE SINGLE-TUNED COIL
~ @ INTERNAL ZENER DIODE REGULATED
SUPPLY
e LOW HARMONIC DISTORTION |
VOLUME CONTROL | 6| |g} LF - OUTPUT
BYPASS 1g | AF- BUFFER OUTPUT
en 3
coe
200"
7 oo .400"
a 2
The Sylvania ECG712 Monolithic TV/FM
Sound System consists of a Multistage Limiting ..-———...___.__ — .
IF Amplifier, DC Gain (Volume) control, FM
Detector, and an Audio Driver constructed on |
a single silicon chip. Excellent sensitivity, | ABSOLUTE MAXIMUM RATINGS
high AM rejection and an internally regulated Supply Voltage Note]
| I, led with | Internal Power Dissipation (Note 2) 850 mW
Power Supply coupled wit OW external com- Power Supply Current 50 mA
ponent requirement makes the ECG712 suitable 3 Operating Temperature Range -40°C to +85°C
for a wide variety of applications including | Storage Temperature Range ; :
TV Sound Channels, Line Operated and Auto- | Scelil cae . coe eS
: : : ° ‘ Silicone DIP -55 Cto+125°C
mobile FM Radios and Mobile Communications besa Teraperature ange
Equipment. Ceramic DIP (Soldering, 60 seconds) 300°C
BLOCK! DIAGRAM
DC VOLUME
V+ CONTROL © DEEMPHASIS
.@ e
5 6 7
r-—-}+---—----—- eats
| | REGULATED ELECTRONIC
| LPOWER SUPPLY ATTENUATOR
piieege IF AMPLIFIER | |
| 2 | FM DETECTOR
INPUT BIASO+ |
| { |
3 gf
e @ W
GROUND QUAD QUAD GROUND — AUDIO TONE
DETECTOR DETECTOR INPUT CONTROL
i
i
NOTES: .
(1) V+ terminal may be connected to any positive voltage through a suitable dropping resistor, provided the dissipation rating is not exceeded.
(2) Rating applies to ambient temperature of 25°C. For ambient terhperatures above 25° C, derate linearly at 6.67mMW/°C.
ELECTRICAL CHARACTERISTICS (Ta, = 25°C, I+ = 30 mA unless otherwise specified)
PARAMETER
STATIC CHARACTERISTICS
Zener Regulating
Voltage (V5)
Supply Current (15)
Internal Power
Dissipation
Voltage at IF Input
Bias (V4 )
Voltage at DC Volume
Control
Voltage at De Emphasis (V7)
Voltage at Quad Detector (Vo)
Voltage at Audio Output (Vj 5)
DYNAMIC CHARACTERISTICS
IF AMPLIFIER
Input Limiting Voltage at
-3dB point
AM Rejection
IF Transconductance
Magnitude
Phase Angle
Feedback Capacitance
Input Impedance Components
Parallel Input Resistance
Parallel Input Capacitance
Output Impedance Components
Parallel Output Resistance
Parallel Output Capacitance
DETECTOR
Recovered AF Voltage
Total Harmonic Distortion
Output Resistance
De emphasis Output
Detector Output
ATTENUATOR
Max. Attenuation
Max. Play-through Voltage*
AUDIO AMPLIFIER
Voltage Gain
Total Harmonic Distortion
Undistorted Output Voltage
Input Resistance
Output Resistance
-
CONDITIONS
Vsupply = 9.0V
It = 33mA
(fo = 4.5 MHz, FM425KHz 1
at 400 Hz, Vin = 100pV)
AM = 30% at 4.5 MHz 1
f = 4.5 MHz
f = 1.0 MHz, Pin 2 to Pin 9
f = 4.5 MHz, Pin 1 to Pin 2
f = 4.5 MHz, Pin 9 to Ground
\fg = 4.5 MHz, FM= 425kHz
at 400 Hz, Viyy = 100 mV)
Vz = 0.1 Vrms, f = 400 Hz
Vg = 2 Vrms, f = 400 Hz
THD = 5%, f = 400 Hz
f = 400 Hz
f = 400 Hz
NN NO
_ TEST CIRCUIT
MIN
10.3
10
343
4.0
40
(0.5
2-0
TYP
11.2 12.2
16 24
370 400
2.0
48
6.1
3.7
5.1 5.8
200 400
50
500
46
<0.02
3.25
75
0.75
0.9 2.0
75
80
0.075 1.0
20
1.5
2.5
70
270
MAX
UNITS ©
Volts
mA
mW
Volts
Volts
Volts
Volts
Volts
Uv
dB
mmho
degrees
pF
kQ
pF
kQ2
pF
Vrms
%
kQ
Q
dB
mV
*Play-through voitage is the unwanted signal, measured at the detector output, when the volume control is set for minimum output.
FREQUENCY RESPONSE OF
IF AMPLIFIER SECTION
20 Vin * 100 pv
10
0
0.1 0.2 0.5 10 §©2.0 5.0 I
FREQUENCY - MHz
1F AMPLIFIER VOLTAGE GAIN - dB
TYPICAL PERFORMANCE CURVES
FREQUENCY RESPONSE OF
AUDIO AMPLIFIER SECTION
AUDIO AMPLIFIER VOLTAGE GAIN - dB
REDUCTION OF RECOVERED AUDIO
FROM MAXIMUM VOLUME - dB
AUDIO GAIN REDUCTION
VERSUS DC VOLUME
CONTROL RESISTANCE
100
BeBe aeleeeel
PL TT aye
Hp
BP Ree...
Be 9 a
|
10 100 500
RESISTANCE FROM DC CONTROL TO GND - KQ
0
TEST CIRCUITS
TEST CIRCUIT 1 , TEST CIRCUIT 2
INPUT LIMITING VOLTAGE, AM REJECTION, RECOVE RED
AUDIO, TOTAL HARMONIC DISTORTION, MAXIMUM ATTEN- AUDIO VOLTAGE GAIN
UATION, MAXIMUM “PLAY-THROUGH” TEST CIRCUIT. (UNDISTORTED OUTPUT)
AM SIGNAL VOLTMETER
GENERATOR
HEWLETT-PACKARD EE ac00.
TYPE 300D
OR EQUIVALENT
DISTORTION
OR
EQUIVALENT)
DISTORTION
ANALYZER
(HEWLETT -
PACKARD
We ]
(HEWLETT-
PACKARD
ae
=QUIVA T
OR
TYP H
ORE ot WALENT) EQUIVALENT)
PINS 11, 12, 13, 14 NO CONNECTION PINS 7, 8, 11, 13 NO CONNECTION
*L) = 164.H NOMINAL
Q(UNLOADED) = 50
TEST CIRCUIT 3 TEST CIRCUIT 4
iF AMPLIFIER SECTION AUDIO AMPLIFIER SECTION
VOLTMETER
(BALLANTINE
TYPE 340
OR EQUIVALENT)
502
ATTENUATOR
VIDEO SWEEP
GENERATOR
(KAY VIDEO 100
MARK ASWEEP
MODEL 154A OR
EQUIVALENT)
Ein = 100LVrms Ein = 100 mv
EQUIVALENT CIRCUIT
Te
a eee Ri ot
TYPICAL APPLICATION
TV SOUND SYSTEM
af
30mA R —
er O=EM 5|_| REGULATED
ce | LPOWER SUPPLY
0.047F
SOUND
TAKE -OFF
TRANSFORMER
*Ly = 164H NOMINAL , Q( UNLOADED) = 50
No responsibility is assumed by Sylvania for use of information contained herein nor for
any infringements of patents or other rights of third parties which may result from its use.
15 SYWANIA
| INCORPORATED
ELECTRONIC COMPONENTS GROUP/WALTHAM, MASS. 02154