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NTE7116
Integrated Circuit
Phase Lock Loop (PLL) Stereo Decoder
(BTSC System)
Description:
The NTE7116 is a phase lock loop (PLL) stereo decoder in a 20–Lead DIP type package designed
primarily for low cost stereo decoding in a low–to–medium–line 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 = 47kΩ. The de–emphasis 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 De–Emphasis 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
LED Driver Current (Peak Value), I
Total Power Dissipation (T
Electrostatic Handling, V
A
es
P
3
= +25°C), P
tot
Operating Ambient Temperature Range, T
Storage Temperature Range, T
stg
18V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
75mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.9W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–2 to +2kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
0° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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DC Characteristics: (VS = 8.5V, TA = +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
Total Current Consumption I
Power Dissipation P
tot
tot
S
Without LED Driver – 19 25 mA
7.0 8.5 16.0 V
– 160 – mW
Voltage
Pin1
Pins 8, 9, 10, 11, 12, & 13 V
DC Output Current (Pin14 & Pin15) –I14, I
LED Driver Current (Pin3) I
Switch “VCO–OFF” Voltage V
Switch “VCO–OFF” Current I
V
1
8–13
3
19
19
– 2.1 – V
– 4.2 – V
15
1.1 1.4 1.8 mA
– – 20 mA
I19 = 50µA – 2 – V
50 – – µA
AC Characteristics: (VS = 8.5V, TA = +25°C, AC Conditions: (1) Input signal (Vi) of 815mV
L = 1, R = 1 (mono), f
of 1.2V
for L = 1, R = 0 and no dbx, fm = 1kHz (stereo) and V
P–P
= 1kHz (80% modulation); (2) MUX input signal (Vi)
m
= 200V
pilot
(3) S1 open, unless specified (without L – R filter), VCO measured with an
external IF roll–of f network (–2dB at 31.5kHz = 2f
) at the input. All the above
H
conditions apply unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
P–P
for
P–P
;
Overall Performance Vi to V
Input Current (rms) I
Overall gain G
AF Output Voltage (rms) V11 = V
o
(rms)
O
V15 = V
Mono; R1 = 47kΩ 4.0 5.8 7.0 dB
10
14
– – 12 µA
460 560 640 mV
– 245 – mV
Total Harmonic Distortion THD Note 1 – 0.3 0.5 %
Output Voltage V11 = V10THD = 1% – 800 – mV
Output Channel Unbalance V11/V
10
– 0.1 1.0 dB
Channel Separation α 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
Channel Separation
Full Stereo
pilot
α
V16 ≥ 1.25V
– 2.5 – dB
24 28 – dB
Smooth Operation V16 = 1V Typ – 10 – dB
Attenuation (L – R) – 6 – dB
Note 1. Guaranteed for mono, mono + pilot and stereo.
Note 2. Adjustable.
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AC Characteristics (Cont’d): (VS = 8.5V, TA = +25°C, AC Conditions: (1) Input signal (Vi) of
815mV
MUX input signal (V
(stereo) and V
for L = 1, R = 1 (mono), fm = 1kHz (80% modulation); (2)
P–P
pilot
) of 1.2V
i
= 200V
P–P
for L = 1, R = 0 and no dbx, fm = 1kHz
P–P
; (3) S1 open, unless specified (without
L – R filter), VCO measured with an external IF roll–of f network (–2dB
at 31.5kHz = 2f
) at the input. All the above conditions apply unless
H
otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Carrier & Harmonic Suppression at the Output (Note 3)
Pilot Signal Suppression αf
Subcarrier Suppression α2f
VCO Suppression α12f
SAP Signal Suppression
α5f
f
H
H
H
H
= 15.734kHz (1fH) 32 36 – dB
pilot
f = 2f
f = 12f
f = 5f
H
H
H
– 60 – dB
– 75 – dB
– 60 – dB
(Second Audio Program)
Intermodulation Suppression
f
= 8.367kHz
m
fm = 10.832kHz α
Ripple Rejection RR
α
Spurious Signal, fs = 1kHz
2
Spurious Signal, fs = 1kHz – 70 – dB
3
120
f = 120Hz, V
= 100mV, mono – 50 – dB
ripple
– 80 – dB
Voltage Controlled Oscillator (VCO)
R Adjust (R5) R
adj
f
= 188.808kHz,
OSC
0 – 8 kΩ
R7 = 10kΩ 5%, C6 = 820pF 1%
Capture Range ∆f/f Deviation from f
frequency: V
pilot
center
OSC
= 200mV
– 45 – %
P–P
Temperature Coefficient TC Uncompensated – 250 x 10
Output Amplifiers
Gain
MUX
G
V
6.7 7.2 7.7 dB
–6
– K
–1
External Signal –0.5 0 +0.5 dB
Input Impedance Z
Output Impedance Z
External Load Impedance Z
External Load Capacitance Z
Mute Suppression
MUX Signal
i
o
1
1
α
– 50 – kΩ
– 10 – Ω
10 – – kΩ
– – 1.5 nF
56 60 – dB
External Signal 56 60 – dB
DC Offset Voltage at Outputs ∆V Mute OFF–to–ON – 10 50 mV
Mute ON–to–OFF – 10 50 mV
Source Selector (Pin6)
Suppression of MUX Signal α V6 ≥ 2V 80 90 – dB
Suppression of External Signal α V6 ≤ 0.8V 56 60 – dB
Switching Level (MUX Selected)
Voltage
Current I
V
IL
Vi = 0.8V – 10 25 µA
IL
– – 0.8 V
Note 3. S1 closed; reference: AF output voltage f = 1kHz mono.
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AC Characteristics (Cont’d): (VS = 8.5V, TA = +25°C, AC Conditions: (1) Input signal (Vi) of
815mV
MUX input signal (V
(stereo) and V
for L = 1, R = 1 (mono), fm = 1kHz (80% modulation); (2)
P–P
pilot
) of 1.2V
i
= 200V
P–P
for L = 1, R = 0 and no dbx, fm = 1kHz
P–P
; (3) S1 open, unless specified (without
L – R filter), VCO measured with an external IF roll–of f network (–2dB
at 31.5kHz = 2f
) at the input. All the above conditions apply unless
H
otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Source Selector (Cont’d) (Pin6)
Switching Level (External Selected)
Voltage
Current I
Muting Circuit (Pin7)
V
IH
IH
Vi = V
P
2 – V
V
P
– 0.1 1.0 µA
Input Voltage V
V
Input Current –I
I
Mute ON – – 0.8 V
IL
Mute OFF 2 – V
IH
Mute ON, VIL = 0.8V – 10 25 µA
IL
Mute OFF, VIH = V
IL
P
– 0.1 1.0 µA
Note 4. Intermodulation suppression (Beat Frequency Components (BFC)):
(signal) (at 1kHz)
V
=
α
2
α3 =
O
V
(spurious) (at 1kHz)
O
(signal) (at 1kHz)
V
O
V
(spurious) (at 1kHz)
O
; fs = (2 x 8.367kHz) –f
H
; fs = (3 x 10.823kHz) –2f
H
measured with 100% modulated input signal: L = R; pilot signal = 200mV
10.823kHz.
Pin Connection Diagram
Multiplexer Input
1
20
GND
P
; fm = 8.367 or
P–P
V
Pilot Presence Det
LED Driver Output
VCO
V
Input 2, Right
V
Right
O
2
3
4
5
P
6Source Selector Input
7Mute Input
8Input 2, Left
9 12
10 11
19
Phase Det
18
L–R De–Emphasis
17
L–R De–Emphasis
Smooth Mono/Stereo Control
16
15
14
13
Decoder Left De–Emphasis
V
O
VO Decoder Right De–Emphasis
Input 1, Left
Input 1, Right
VO Left
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20 11
.280 (7.12) Max
110
.995 (25.3) Max
.280
(7.12)
.100 (2.54) .125 (3.17) Min .385 (9.8)
.300
(7.62)
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