LM1884N ,16 V, 33.5 mA, TV stereo decoderBlock Diagram
COMPOSITE
INPUT
- - - -
BUFFER
AMP
L + It L - ll
00TH" DUINT
"FFER IUFF ..
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Symbol ..
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I do channel switching
I 12V to 18V supply operation
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LM1884N
16 V, 33.5 mA, TV stereo decoder
LM1884
gil Natiqnal _
Semiconductor
LM1884 TV Stereo Decoder
General Description
The LM1884 is a decoder designed for television stereo. An
L-R output is provided to drive further audio processing.
Features
a Low impedance L+R and L--R outputs
n Mono/Stereo switching and indication
II Low distortion-OA" typical
Applications
u Stereo television sets
1: Stereo adapters
II Cable television
Block Diagram
- - ""1
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OUT OUT
TL/H/6759-1
Order Number LM1884N
See NS Package Number N16A
2-1 08
Absolute Maximum Ratings TA= + 25°C unless otherwise noted
If Mllltary/Aerospace speclfled devlces are required,
please contact the National Setttlttondutttttr Sales
Ottltte/Dltttrittutttrtt for availability and apertWtatlorts.
Operating Temp. Range (Ambient)
Storage Temperature Range
Lamp Drive Voltage
- 40°C to + 85°C
-65°C to + 150°C
Power Supply Voltage 16V Max Voltage at Pin 7 with Lamp "Off" 16V
Power Dissipation (Package Limitation) 1800 mW Lamp Current 100 mA
Derate Above TA = + 25 C 15 mW/ C Lead Temperature (Soldering 10 sec.) 26tPC
Electrical Characteristics
Parameters Guaranteed by Electrical Testing Test Circuit, TA---- + 25°C, Vcc=12V unless noted
Parameter I Condltlons I Mln I Typ Max Units
DC VIN = 0
Supply Current Vcc == 16V 15 33.5 50 mA
Output Voltage Pin 4 1.7 3.5 5.0 V
Output Voltage Pin 5 1.7 3.8 5.0 V
Output Impedance Pins 4, 5 100 300 n
Lamp Leakage Lamp off, pin 7 voltage = 16V 0.1 mA
Lamp Saturation Voltage Lamp on, pin 7 current-- 100 mA 2.0 V
Audio Composite signal with 38 kHz subcarrier and 10% 19 kHz pilot, fmod = 1 kHz. Adjust P1 for 19 kHz 1 10 Hz.
L+ R Channel Gain VIN = 2.5Vpp L = R, pilot off, pin 4 0.8 1.0 1.2
L+ R Channel THD VIN = 2.5Vpp L= R, pilot off, pin 4 0.1 1.0 %
Gain Ratio, L+ R Channel VIN = 2.5Vpp, L only -2.0 0.0 2.0 db
to L - R Channel
Supply Rejection 100 mVrms, 1 kHz on supply, VIN = 0 30 60 db
DC Output Shift, Pilot off to on. pins 4, 5 i 20 mV
Mono to Stereo
Input Impedance Pin 1 15 50 150 kn
Pilot Level for Lamp On 12 20 mV
Pilot Level for Lamp Off 3 10 mV
Capture Range Pilot = 25 mVrms t 0.5 M,
Test Circuit ll
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- tN "''"'ts " u
- tht ,r 0.22 us 11.22 pf
c: "I dll/f, muse
M" 220 FF t
1011 um " " " " le 11 " ' mum:
vco ‘00
mun Lm884 =
comm: ' " t 3 4
m m Hum tlt _I cs
2 ,5 0.11 .5
11.0012 "
Ete STEREO
"' momma
'Metal film, zero temperature - stu.e,
tttNyfrrtgkmt resistor recommended OUTPUTS TL/Hf6759-3
FIGURE 1
788LW'I
LM1884
Typical Application
I Vnc-1G m,
0 47 -
__. cs “F ca
0.1 ur- 0.33 ,r
ca 15.134 km F
uonrron l
m . m " STEREO
m N220 to " " " I12 t,, 10 I
PI noun
mun mum W.'
comm: F' " 2 3 . 7 I
INPUT =
tlt _.I F- co m
"F 0.0082 " 080 ht:
' " 8mm
Tks mmcmn
= b+tt
OUTPUTS
TL/H/6759-2
. Metal Nm, zero temperature
txtemcient resistor vecommended
Supply Current vs Capture Range " VCO Frequency "
35 Supply Voltage Pllot Level
sum mm (M)
nun LEVEL mm (me3)
l B 10 11 It " " 15 " 18 19
SUPPLY VOLTAGE (V) FREQUENCY (kHz)
Power Supply Rejectlon
" Supply Voltage
Supply Voltage
msoumv (m1)
20 I 9131112 13141516
sumv vcmna Ill)
Total Harmonic Dlatortlon "
Composlte Input Level
a l-Hdiz. i"." " Vcc- -
50 L+it
40 a IM CHANNEL
I to I th3 Voc-1 V
g g...
8 91011121314151! , ma " 2.4 " "
SUPPLY VOLTAGE (V)
COMPOSITE INPUT LEVEL (Vp-p)
TL/H/6759-4
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
National Semiconductor was acquired by Texas Instruments.
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This file is the datasheet for the following electronic components:
LM1884N - product/lm1884n?HQS=TI-nu|I-nu|I-dscatalog-df-pf-null-wwe
