NTE7116
Integrated Circuit
Phase Lock Loop (PLL) Stereo Decoder
(BTSC System)
Description:
The NTE7116 is a phase lock loop (PLL) stereo decoder in a 20Lead DIP type package designed
primarily for low cost stereo decoding in a lowtomediumline TV. The MUX input (Pin1) is a low
impedance current input, the gain of the input amplifier is therefore determined by the external resistor
R1. All characteristics are measured with R1 = 47k
. The deemphasis of (L, R) and (L R) can
be chosen by means of external capacitors and resistors. The supply voltage range of the device is
from 7V to 16V.
Features:
D
Wide Supply Voltage Range
D
Automatic Mono/Stereo Switching (Pilot Presence Detector)
D
LED Driver for Stereo Indicator
D
Smooth Mono/Stereo Control
D
Matrix and Two Amplifiers for Left and Right Output Signals
D
A Source Selector to Switch between the MUX Signal and an External Signal
D
Mute Circuit for 60dB Muting of the Output Level
D
External DeEmphasis Control of (L, R) and (L R)
D
6dB Fixed Attenuation of (L R) with respect to (L + R) Prior to Matrix
D
All Pins are Protected Against Electrostatic Discharge (ESD)
Absolute Maximum Ratings:
Supply Voltage Range (Pin5), V
P
18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LED Driver Current (Peak Value), I
3
75mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Power Dissipation (T
A
= +25
C), P
tot
1.9W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrostatic Handling, V
es
2 to +2kV
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
A
0
to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Characteristics:
(V
S
= 8.5V, T
A
= +25
C, all voltages are with respect to GND (Pin20), all
currents are positive into the device unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Voltage
V
S
7.0
8.5
16.0
V
Total Current Consumption
I
tot
Without LED Driver
19
25
mA
Power Dissipation
P
tot
160
mW
Voltage
Pin1
V
1
2.1
V
Pins 8, 9, 10, 11, 12, & 13
V
813
4.2
V
DC Output Current (Pin14 & Pin15)
I
14
, I
15
1.1
1.4
1.8
mA
LED Driver Current (Pin3)
I
3
20
mA
Switch "VCOOFF" Voltage
V
19
I
19
= 50
A
2
V
Switch "VCOOFF" Current
I
19
50
A
AC Characteristics:
(V
S
= 8.5V, T
A
= +25
C, AC Conditions: (1) Input signal (V
i
) of 815mV
PP
for
L = 1, R = 1 (mono), f
m
= 1kHz (80% modulation); (2) MUX input signal (V
i
)
of 1.2V
PP
for L = 1, R = 0 and no dbx, f
m
= 1kHz (stereo) and V
pilot
= 200V
PP
;
(3) S1 open, unless specified (without L R filter), VCO measured with an
external IF rolloff network (2dB at 31.5kHz = 2f
H
) at the input. All the above
conditions apply unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Overall Performance V
i
to V
o
Input Current (rms)
I
(rms)
12
A
Overall gain
G
O
Mono; R1 = 47k
4.0
5.8
7.0
dB
AF Output Voltage (rms)
V
11
= V
10
460
560
640
mV
V
15
= V
14
245
mV
Total Harmonic Distortion
THD
Note 1
0.3
0.5
%
Output Voltage
V
11
= V
10
THD = 1%
800
mV
Output Channel Unbalance
V
11
/V
10
0.1
1.0
dB
Channel Separation
L = 1, R = 0
24
28
dB
Signal to Noise Ratio
S/N
Bandwidth 20Hz to 16kHz
76
dB
Pilot Presence Detector (Note 2)
Switching to
Stereo
V
pilot
40
60
mV
Mono
15
30
mV
Hysteresis
V
pilot
2.5
dB
Channel Separation
Full Stereo
V
16
1.25V
24
28
dB
Smooth Operation
V
16
= 1V Typ
10
dB
Attenuation (L R)
6
dB
Note 1. Guaranteed for mono, mono + pilot and stereo.
Note 2. Adjustable.
AC Characteristics (Cont'd): (V
S
= 8.5V, T
A
= +25
C, AC Conditions: (1) Input signal (V
i
) of
815mV
PP
for L = 1, R = 1 (mono), f
m
= 1kHz (80% modulation); (2)
MUX input signal (V
i
) of 1.2V
PP
for L = 1, R = 0 and no dbx, f
m
= 1kHz
(stereo) and V
pilot
= 200V
PP
; (3) S1 open, unless specified (without
L R filter), VCO measured with an external IF rolloff network (2dB
at 31.5kHz = 2f
H
) at the input. All the above conditions apply unless
otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max Unit
Carrier & Harmonic Suppression at the Output (Note 3)
Pilot Signal Suppression
f
H
f
pilot
= 15.734kHz (1f
H
)
32
36
dB
Subcarrier Suppression
2f
H
f = 2f
H
60
dB
VCO Suppression
12f
H
f = 12f
H
75
dB
SAP Signal Suppression
(Second Audio Program)
5f
H
f = 5f
H
60
dB
Intermodulation Suppression
f
m
= 8.367kHz
2
Spurious Signal, f
s
= 1kHz
80
dB
f
m
= 10.832kHz
3
Spurious Signal, f
s
= 1kHz
70
dB
Ripple Rejection
RR
120
f = 120Hz, V
ripple
= 100mV, mono
50
dB
Voltage Controlled Oscillator (VCO)
R Adjust (R5)
R
adj
f
OSC
= 188.808kHz,
R7 = 10k
5%, C6 = 820pF 1%
0
8
k
Capture Range
f/f
Deviation from f
OSC
center
frequency: V
pilot
= 200mV
PP
45
%
Temperature Coefficient
TC
Uncompensated
250 x 10
6
K
1
Output Amplifiers
Gain
MUX
G
V
6.7
7.2
7.7
dB
External Signal
0.5
0
+0.5
dB
Input Impedance
Z
i
50
k
Output Impedance
Z
o
10
External Load Impedance
Z
1
10
k
External Load Capacitance
Z
1
1.5
nF
Mute Suppression
MUX Signal
56
60
dB
External Signal
56
60
dB
DC Offset Voltage at Outputs
V
Mute OFFtoON
10
50
mV
Mute ONtoOFF
10
50
mV
Source Selector (Pin6)
Suppression of MUX Signal
V
6
2V
80
90
dB
Suppression of External Signal
V
6
0.8V
56
60
dB
Switching Level (MUX Selected)
Voltage
V
IL
0.8
V
Current
I
IL
V
i
= 0.8V
10
25
A
Note 3. S1 closed; reference: AF output voltage f = 1kHz mono.
AC Characteristics (Cont'd): (V
S
= 8.5V, T
A
= +25
C, AC Conditions: (1) Input signal (V
i
) of
815mV
PP
for L = 1, R = 1 (mono), f
m
= 1kHz (80% modulation); (2)
MUX input signal (V
i
) of 1.2V
PP
for L = 1, R = 0 and no dbx, f
m
= 1kHz
(stereo) and V
pilot
= 200V
PP
; (3) S1 open, unless specified (without
L R filter), VCO measured with an external IF rolloff network (2dB
at 31.5kHz = 2f
H
) at the input. All the above conditions apply unless
otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max Unit
Source Selector (Cont'd) (Pin6)
Switching Level (External Selected)
Voltage
V
IH
2
V
P
V
Current
I
IH
V
i
= V
P
0.1
1.0
A
Muting Circuit (Pin7)
Input Voltage
V
IL
Mute ON
0.8
V
V
IH
Mute OFF
2
V
P
V
Input Current
I
IL
Mute ON, V
IL
= 0.8V
10
25
A
I
IL
Mute OFF, V
IH
= V
P
0.1
1.0
A
Note 4. Intermodulation suppression (Beat Frequency Components (BFC)):
2
=
V
O
(signal) (at 1kHz)
V
O
(spurious) (at 1kHz)
; f
s
= (2 x 8.367kHz) f
H
3
=
V
O
(signal) (at 1kHz)
V
O
(spurious) (at 1kHz)
; f
s
= (3 x 10.823kHz) 2f
H
measured with 100% modulated input signal: L = R; pilot signal = 200mV
PP
; f
m
= 8.367 or
10.823kHz.
V
O
Left
V
O
Decoder Right DeEmphasis
V
O
Decoder Left DeEmphasis
Pin Connection Diagram
V
O
Right
V
P
Input 1, Left
Input 2, Right
1
2
3
4
Multiplexer Input
Pilot Presence Det
LED Driver Output
VCO
5
6
Source Selector Input
7
Mute Input
8
Input 2, Left
20
19
18
17
GND
Phase Det
LR DeEmphasis
LR DeEmphasis
16
Smooth Mono/Stereo Control
15
14
13
Input 1, Right
9
12
10
11
.995 (25.3) Max
.280 (7.12) Max
.100 (2.54)
.125 (3.17) Min
.385 (9.8)
.300
(7.62)
.280
(7.12)
1
10
20
11
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