The SL486 is a high gain preamplifier designed to form an
interfac e b etw een an infra-red rec eiv ing diode and the digital inpu t
of remote c ontrol rec eiv ing c irc u its. The dev ic e c ontains tw o other
c irc u it elements, one to prov ide a stretc hed ou tpu t pu lse fac ility
and a v oltage regu lator to allow operation from a w ide range of
su pplies.
FEATURES
■
F ast A c ting A G C Improv es O peration In N oisy
E nv ironments
■
D ifferential Inpu ts R edu c e N oise P ic k -u p and Improv e
Stab ility
■
G y rator Circ u it A llow s O peration in E nv ironments w ith
H igh B rightness B ac k grou nd Light Lev els
■
O u tpu t P u lse Stretc her for u se w ith M ic roproc essor
D ec oders
■
O n-c hip R egu lator allow s O peration from W ide R ange
of P ow er Su pplies
■
Low N oise O u tpu t
3 05 5 -2 .2
SL 4 8 6
IN FRA RED REM O TE C O N TRO L P REAM P L IFIER
F ig. 2 SL486 b loc k diagram
O RD ERIN G IN FO RM ATIO N
SL 4 8 6 N A D P
SL 4 8 6 N A M P
DIODE CATHODE
G Y R ATOR C2
G Y R ATOR C1
IN P U T V
CC
(V
CCI
)
2N D S TAG E DECOU P L E
4TH S TAG E DECOU P L E
OU TP U T V
CC
(V
CCO
)
AG C DECOU P L E
DIODE AN ODE
1S T S TAG E DECOU P L E
IN P U T V
EE
(V
EEI
)
OU TP U T V
EE
(V
EEO
)
R EG U L ATOR IN P U T (V
R EG IN
)
S TR ETCH OU TP U T
S TR ETCH IN P U T
OU TP U T
S L 48 6
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
D P 1 6
M P 1 6
1
1 0V w rt V
E E I
1
1 0V w rt V
E E O
2
2 0V w rt V
CCO
5 mA
5 mA
0
°
C to
1
7 0
°
C
2
5 5
°
C to
1
1 5 0
°
C
AB SO L UTE M AX IM UM RATIN G S
Su pply v oltage, V
CCI
Su pply v oltage, V
CCO
R egu lator inpu t v oltage, V
R E G IN
O u tpu t c u rrent
Stretc h ou tpu t c u rrent
O perating temperatu re range
Storage temperatu re
5·4k
2·4k
G Y R ATOR
DIF F ER EN TIAL
IN P U T S TAG E
DIODE
CATHODE
DIODE
AN ODE
B U F F ER
15k
AG C P EAK
DETECTOR
R EG U L ATOR
P U L S E
S TR ETCH
1
16
14
15
8
12
13
V
EEI
1S T S TAG E
DECOU P L E
AG C
DECOU P L E
V
EEO
R EG U L ATOR
IN P U T
(V
R EG IN
)
9
10
11
OU TP U T
S TR ETCH
IN P U T
S TR ETCH
OU TP U T
V
CCO
4TH S TAG E
DECOU P L E
7
6
2N D S TAG E
DECOU P L E
5
2
3
G Y R ATOR
C1 C2
4
V
CCI
V
R EG
*
*
W hen regu lator is u sed
(see A pplic ation N otes).
F ig. 1 P in c onnec tions - top v iew
(Supersedes version in April 1994 Consumer IC Handbook, HB3120 - 2.0)
