LA1845N Sanyo Semiconductor Corporation, LA1845N Datasheet

no-image

LA1845N

Manufacturer Part Number
LA1845N
Description
Single-Chip Home Stereo IC
Manufacturer
Sanyo Semiconductor Corporation
Datasheet
Ordering number : ENN7185A
Overview
The LA1845N is designed for use in mini systems and is a
single-chip tuner IC that provides electronic tuning
functions using SD/IF-count technigue. It incorporates a
pilot canceler and an adjustment-free MUX VCO circuit,
thus allows additional parts to be reduced.
Functions
• AM:
• FM IF: IF amplifier, quadrature detector, S-meter, SD
• MPX: PLL stereo decoder, stereo display, forced
Features
• Integrated MPX VCO (ceramic resonators are no longer
• Built-in adjacent channel interference rejection function
• Supports both SD and IF-count techniques
• Both FM SD sensitivity and bandwidth can be set
• Pilot canceler built in.
required.)
(114 kHz, 190 kHz)
RF amplifier, mixer, oscillator, IF amplifier,
detector, AGC, SD, oscillator buffer, IF buffer,
stereo IF output, AGC time constant switch
(signal detection), S-curve detection, IF buffer
output
monaural, VCO stop, audio muting, adjacent
channel interference rejection function, pilot
canceler
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
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.
SANYO Electric Co.,Ltd. Semiconductor Company
Package Dimensions
unit: mm
3067A-DIP24S
(0.71)
Single-Chip Home Stereo IC
24
1
0.9
1.78
O2703SI (OT) /91002RM (OT) No. 7185-1/9
0.48
21.0
[LA1845N]
0.95
13
12
Monolithic linear IC
LA1845N
SANYO: DIP24S

Related parts for LA1845N

LA1845N Summary of contents

Page 1

... Ordering number : ENN7185A Overview The LA1845N is designed for use in mini systems and is a single-chip tuner IC that provides electronic tuning functions using SD/IF-count technigue. It incorporates a pilot canceler and an adjustment-free MUX VCO circuit, thus allows additional parts to be reduced. Functions • AM: RF amplifier, mixer, oscillator, IF amplifier, ...

Page 2

... S/N AM1 Signal-to-noise ratio 2 S/N AM2 Total harmonic distortion 1 THD AM1 Total harmonic distortion 2 THD AM2 SD sensitivity Local oscillator buffer output V OSC-AM IF counter buffer output V IFBuff-AM LA1845N Symbol Conditions V max CC Pd max Ta = 80°C Topr Tstg Symbol Conditions 80° the specified test circuit. ...

Page 3

... FM-IN (10.7MHz) 300 0.047 F 75 HW6215 33 F 0.047 F LA1845N 0.047 F 50 0.047 F 4.7 F 1000pF 0.01 F 20k LA1845N TU-LED ST-LED V-SD V-ST 50k 50k 1000pF AM IF 600BEAS-10471 LPF A 0dB A LPF 0.1 F 20k 0.0047 F 65k 0.015 F 0.015 Top view 9 10 ...

Page 4

... V switch, mute switch Phase comparator V – 1.0 11 low-pass filter CC (AM/FM switching) LA1845N Notes = 330 Ω Input impedance r i Connect the mixer coil between this pin and V CC Vreg = 2.3 V Input impedance kΩ i Active low Open collector The 600BEAS-10471 (Toko Mfg ...

Page 5

... V (AM) S meter, 0.2 V (FM AGC 0.9 V (AM) LA1845N Notes The device is forced to monaural when a current of over 50 µA flows from this pin. The VCO is stopped when a current of over 200 µA flows from this pin. The limit values for the resistor are the same as those for pin 11 ...

Page 6

... Vcc Oscillator buffer output, 24 Vcc - 1 sensitivity adjustment LA1845N Notes Must be used at the same potential as pin 22 The FM SD bandwidth can be adjusted with the external resistor connected between this pin and pin 3 (Vreg) Connect the oscillator coil between this pin and pin 9 (Vcc) Note: Impedance of the secondary oscillator coil must be 5 kΩ ...

Page 7

... N -- Input, INPUT — Input/Output Characteristics 2 Input, INPUT — dB Multiplex Frequency Characteristics 1 Modulation frequency, fm — Supply Voltage Characteristics 1 Supply voltage, V — LA1845N FM Input/Output Characteristics 1 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 100 120 ILA00967 FM Detuning Characteristics Multiplex Frequency Characteristics 2 Modulation frequency, fm — Hz ...

Page 8

... Supply voltage, V — Multiplex Supply Voltage Characteristics Supply voltage, V — Temperature Characteristics Ambient temperature, Ta — Temperature Characteristics Ambient temperature, Ta — C LA1845N FM Supply Voltage Characteristics Supply voltage, V ILA00975 AM Temperature Characteristics -- -- --80 Ambient temperature, Ta — C ILA00977 FM Temperature Characteristics 1 0 --20 ...

Page 9

... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of October, 2003. Specifications and information herein are subject to change without notice. LA1845N Multiplex Temperature Characteristics 2 2.0 1.5 1.0 ...

Related keywords