ETC ILA1238NS

ILA1238NS
FM/AM STEREO RADIORECEIVER
DESCRIPTION
ILA1238NS is a high performance one - chip bipolar ICS designed for FM/AM stereo radios. These include an FM/AM
front end, FM/AM IF amplifier, FM/AM detection output and FM stereo demodulator output. Bipolar silicon monolithic IC.
FEATURES
• Low current consumption
(In FM mode ID = 11.0 mA, in AM mode 8.5 mA,
VCC = 6.0V).
• Built - in LED drive circuit for tuning.
• Built - in LED drive circuit for stereo indicator.
• Built - in detune muting circuit for the FM band.
• Few external parts.
ELECTRICAL CHARACTERISTICS(TA = 25°C)
Symbol
Parameter
Test Conditions
Guaranteed Limits
Min
ID1/D2
AM/FM circuit current
No signal AM/FM
GV1
FM front end voltage gain
VIN1 = 40dBmV, 100MHz
VD1/D3
VD2
FM/AM detection output level
Unit
Typ
Max
8.5/11
12.0/
15.0
mA
28
35
42
dB
35
77.5
138
VRMS
25
31
dBmV
0.3/0.6
2.0
%
19
24
28
dB
29
dB
FM IF knee level
THD1/HD2
FM/AM detection output
distortion factor
GV2
AM front end voltage gain
GV3
AM IF voltage gain
15
21
Separation
30
40
VI1
M/ST switching level by IF
input
38
43
48
dBmV
A1
FM Mute
16
23
30
dB
SEP
VIN2 = 60dBmV, 1660kHz
Vin5=245mVrms,
MONO,1kHz ATT
Korzhenevsky 12, Minsk, 220064, Republic of Belarus
Fax: +375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
dB
ILA1238NS
BLOCK-SCHEME
30
29
28
VCO
27
26
25
24
23
21
20
19
18
REGULATOR
PD1
MUTING
PD2
DECODE
AMP
1
2
AUTO
BLEND
BU
AMP
DC
AMP
3
FM IF
DISCRI
5
6
7
8
9
AM IF
DET
BU
AMP
DETUNE
MUTING
CONTROL
DC
AMP
RIPPLE
FILTER
4
16
AM FE
DC
AMP
M/ST
SW
17
FM FE
MULTIPLEX
REGULATOR
1/2
COUNTER
22
10
11
TUNING IND
12
13
14
15
APPLICATION CIRCUIT
0.001
C5
C6
10.0
L1
C9
10.0
R12
220K
C8
3.3
RV
22K
R3
C10
0.47
C1
7p
CF3
10K
C4
C2
2p
3p
R9*
100
L4
L2
C3
18p
C7
30
29
28
27
26
25
24
23
22
21
20
GND PLL MPX VCO FM MUTE AM AFC FM REG FM
LPF REG
DISCRI
OSC
OSC
RF
R4
2.2K
4p
L3
R2 2.2K
19
AM
RF
IN
18
FM
RF
IN
17
16
GNDFM/AM
FE
OUT
ILA1238NS
C11
4.7
ST
PILOTPILOT IND
FM
PLL DET DET VCO Rch Lch
RIPPLE AGC AGC
TUNE IF
LPF LPF1 LPF2 CHECKOUT OUT Ucc FILTERAFC1 AFC2 GND IND IN
1
2
3
4
5
R5
C12 2.2K
1.0
R11
220K
Rch OUT
Lch OUT
C13*
0.022
6
7
8
9
10
C16 C17
33.0 1.0
R6*
3.3K
11
12
13
C18
4.7 R8
2.2K
R1
150K
AM
IF BAND
IN SELECT
14
15
C20
0.01
C19
S1
BAND
0.01
CF2
R10 330
CF1
C14*
0.022
R7*
3.3K
Ucc=3B
C15
100.0
Korzhenevsky 12, Minsk, 220064, Republic of Belarus
Fax: +375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: [email protected]
URL: www.bms.by
IFT