Sanyo LA1875M Specifications
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
Monolithic Linear IC
Single-chip, Electronic Tuner for Car Stereo
Ordering number:ENN3342B
LA1875M
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Overview
The LA1875M is an electronic tuner IC that incorporates
AM, FM IF and MPX circuit sections on a single chip,
making it ideal for use in car stereo equipment.
The LA1875M features an antenna-damping AM A GC cir cuit with rapid charge and discharge characteristics. It also
features an S-meter driver , tuning and FM-stereo LED outputs, FM soft-mute and forced mono modes and a no-adjustment MPX VCO.
The LA1875M AM circuit comprises a mixer, oscillator,
RF A GC, IF amplif ier and IF buf fer . The FM IF circuit comprises an IF amplifier, eqadrature detector, and AFC and IF
buffer outputs. The MPX circuit comprises a VCO and stereo noise control (SNC) and high-cut control (HCC) circuits.
The LA1875M operates from a 7 to 10V supply and is available in 36-pin MFPs.
Features
• AM, FM IF and MPX circuits.
• Antenna-damping AM AGC circuit with rapid char ge and
discharge characteristics.
• S-meter driver.
• Tuning and FM-stereo LED outputs.
• AFC and IF buffer outputs.
• AM mixer, oscillator, AGC, IF amplifier and IF buffer.
• FM IF amplifier, quadrature detector.
• MPX no-adjustment VCO, SNC and HCC.
• FM soft-mute and forced-mono modes.
• 7 to 10V supply.
• 36-pin MFP.
Package Dimensions
unit:mm
3129-MFP36S
[LA1875M]
36
1
15.3
0.4
0.8
19
7.9
18
2.25
2.5max
0.1
0.85
SANYO : MFP-36S
0.25
9.2
0.65
10.5
11200TH (KT)/3272TS No.3342–1/12
LA1875M
Specifications
Maximum Ratings at Ta = 25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatlovylppuSV
noitapissidrewoPP
(Ta≤50˚C)
egnarerutarepmetgnitarepOrpoT 08+ot03–
egnarerutarepmetegarotSgtsT 051+ot04–
CC
D
Recommended Operating Conditions at Ta = 25˚C
retemaraPlobmySsnoitidnoCsgnitaRtinU
egatlovylppuSV
egnaregatlovylppuSV
CC
CC
Electrical Characteristics
FM characteristics at Ta = 25˚C, VCC=8.5V, fc=10.7MHz, fm=1kHz, 75kHz deviation unless otherwise noted.
retemaraPlobmySsnoitidnoC
tnerrucylppustnecseiuQI
ytivitisnesgnitimilBd3–SLBd3–VotderrefeR
egatlovtupnino-nrutDELgninuTV
egatlovtuptuorotceteDV
egatlovtuptuoretem-SV
egatlovtuptuoreffubFIV
egatlovtuptuoCNSV
htdiwdnabno-nrutDELgninuTWB
oitaresion-ot-langiSN/SVIµBd001=6647Bd
oitarnoisserppusMARMAV
noitatapeSpeSV
ecnalablennahCBC5.1–05.1+Bd
noitaunettatuptuoCCH
noitaludomenottolipno-nrutDELoeretSNO-DELVIµBd001=8.12.30.5%
noitaludomenottolipffo-nrutDELoeretSFFO-DELVIµBd001=2.2%
noitrotsidcinomrahlatoTDHT
OCC
DEL
O
MS
FI
BUS
DEL
α
langisoN121314Am
V62V2=348537µBd
V
I
V
I
V
I
V
I
V
I
I
I
V
I
V
I
V
I
I
µBd001=561052543Vm
langisoN051.07.0
µBd001=0.51.60.7
V,µBd08=
V5=002063045Vm
21
V,µBd001=
43
V,µBd001=
≥ V258031081zHk
62
.etoneeS,µBd001=0354Bd
V,µBd001=
f,V6.0=
33
m
langisonom,µBd001=5.05.2
.NOsietuM,µBd001=727374µBd
.etoneeS.V1.0=5.00.5Vm
noitaludomMA%03htiwzHk1taµBd001=8306Bd
.etoneeS,zHk01=0.01–0.5–5.0–Bd
langislennahcniam,µBd001=5.05.2
nimpytxam
Note
VI comprises 90% left + right signal and 10% pilot signal.
11V
027Wm
5.8V
01ot7V
sgnitaR
˚C
˚C
tinU
V
%
AM characteristics at Ta = 25˚C, VCC=8.5V, fc=1MHz with 30% modulation.
retemaraPlobmySsnoitidnoC
tnerrucylppustnecseiuQI
egatlovtupnino-nrutDELgninuTV
egatlovtupnino-nrutCGAFRV
egatlovtuptuorotceteDV
egatlovtuptuoreffubFIV
egatlovtuptuoretem-SV
tnerrucrevirdedoid-niPI
oitaresion-ot-langiSN/S
noitrotsidcinomrahlatoTDHT
OCC
DEL
CGA
O
FI
MS
dtna
langisoN614233Am
V62V2=120393µBd
VIV3=057546µBd
V
µBd52=810486
I
V
µBd47=07501651
I
V
I
V
I
VIV7.0=0.25.20.3Am
V
I
V
I
V
I
V
I
V,µBd05=
V5=051062093Vm
21
langisoN07.03.1
µBd47=6.27.32.5
µBd52=7112
µBd47=2494
µBd47=53.00.1
µBd031=4.00.2
sgnitaR
nimpytxam
tinU
Vm
V
Bd
%
No.3342–2/12
Block Diagram
LA1875M
Sample Printed Circuit Pattern
No.3342–3/12
Specified Test Ciruit
LA1875M
No.3342–4/12
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