la1845nv

Manufacturer Part Numberla1845nv
DescriptionSingle-chip Home Stereo Ic
ManufacturerSanyo Semiconductor Corporation
la1845nv datasheet
 


1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
Page 1/10

Download datasheet (536Kb)Embed
Next
Ordering number : ENN*7931
LA1845NV
The LA1845NV is designed for use in mini systems and is a single-chip tuner IC that provides electronic tuning
functions using SD/IF-count technique. 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, detector, AGC, SD, oscillator buffer, IF buffer, stereo IF output,
AGC time constant switch
• FM IF : IF amplifier, quadrature detector, S-meter, SD (signal detection), S-curve detection, IF buffer output
• MPX : PLL stereo decoder, stereo display, forced monaural, VCO stop, audio muting, adjacent channel interference
rejection function, pilot canceler
Features
• Integrated MPX VCO (ceramic resonators are no longer required.)
• Built-in adjacent channel interference rejection function (114kHz, 190kHz)
• Supports both SD and IF-count techniques
• Both FM SD sensitivity and bandwidth can be set
• Pilot canceler built in.
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Maximum Power Supply Voltage
V CC max
Allowable Power Consumption
Pd max
Operating Temperature
Topr
Storage Temperature
Tstg
Operating Conditions at Ta = 25°C
Parameter
Symbol
Recommended Supply Voltage
V CC
Operating Supply Voltage Range
V CC op
Any and all SANYO Semiconductor 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 Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor 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 Semiconductor
products described or contained herein.
Monolithic Linear IC
Single-Chip Home Stereo IC
Conditions
Ta = 80°C with board
114.3mm×76.1mm×1.6mm material :
Glass epoxy resin
Conditions
Ta = 80°C
Ratings
Unit
6
V
360
mW
°C
-20 to +80
-40 to +125
°C
Ratings
Unit
5
V
4.3 to 5.5
V
92706 / 91004 JO IM No.7931-1/10

la1845nv Summary of contents

  • Page 1

    ... Ordering number : ENN*7931 LA1845NV The LA1845NV is designed for use in mini systems and is a single-chip tuner IC that provides electronic tuning functions using SD/IF-count technique. It incorporates a pilot canceler and an adjustment-free MUX VCO circuit, thus allows additional parts to be reduced. Functions • amplifier, mixer, oscillator, IF amplifier, detector, AGC, SD, oscillator buffer, IF buffer, stereo IF output, AGC time constant switch • ...

  • Page 2

    ... Total Harmonic Distortion 1 80dBµ, 30% modulation 1kHz Total Harmonic Distortion 2 107dBµ, 30% modulation 1kHz SD Sensitivity 0% modulation Local Oscillator Buffer Output With no input signal IF Counter Buffer Output 23dBµ LA1845NV Conditions min 230 200 Conditions min Conditions min 100 140 ...

  • Page 3

    ... Vreg 5 GND 0V 6 Tu-LED ST-LED/AF-IF output 8 FM detector LA1845NV Equivalent circuit Input impedance 330Ω Connect the mixer coil between this pin and Vreg = 2.1V 3 Input impedance 2kΩ 4 Active low Open collector 6 7 The 600BEAS-10471 (Toko Mfg. Co., Ltd.) is recommended for detector coil ...

  • Page 4

    ... Decoder input Vreg 17 PLL input Vreg 18 FM demodulator Vreg+0.7 output LA1845NV Equivalent circuit V 10 ≤0.5V : Reception state 1.4V≤V 10 ≤2.2V : Muting ≥3. counter output and muting on 10 The device operates in AM mode when a current of 11 over 200µA flows from pin. 12. ...

  • Page 5

    ... Vreg 23 OSC Oscillator buffer V CC -1.4 output sensitivity adjustment LA1845NV Equivalent circuit Output impedance 3.3kΩ 19 The resistance of the built-in resistor R is 13.9kΩ. The SD response during seek operation is determined with the external capacitor connected to 20 this pin. R Must be used at the same potential as pin 22. ...

  • Page 6

    ... Equivalent Circuit Block Diagram LA1845NV No.7931-6/10 ...

  • Page 7

    ... Test Circuit LA1845NV No.7931-7/10 ...

  • Page 8

    ... LA1845NV No.7931-8/10 ...

  • Page 9

    ... LA1845NV No.7931-9/10 ...

  • Page 10

    ... SANYO Semiconductor 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 September, 2004. Specifications and information herein are subject to change without notice. LA1845NV PS No.7931-10/10 ...