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Ordering number : EN*8320
LV25300M
Overview
Bi-CMOS IC
1-chip Tuner IC
The LV25300M integrates all six blocks (FM FE, FM IF, double conversion AM, AM-NC, and PLL diversity) required in car radio tuner on a single ship.
Features
The LV25300M is a tuner system that supports the SDRS300 (SANYO car audio DSP) that allows the creation of standard tuner modules. Various setting changes can be performed with the software of the control microcontroller according to the intended application. Small tuner modules can be developed with a smaller number of parts compared to conventional tuners and at a lower total cost. Moreover, the LV25300M comes with an antenna switching diversity function that switches two antennas in response to various electric field changes while the vehicle is running, a malfunction prevention circuit that operates through antenna switching frequency detection, and a weak electric field detection, and antenna fixing circuit that uses S meter voltage, making stable reception possible.
Functions
FM F.E. * Balanced input type double balanced mixer (FM mixer 1) * Dedicated RF tuner DAC (8 bits x 2) * Pin diode drive AGC output (antenna damping) * MOSFET second gate drive AGC output * Keyed AGC adjustment pin (3D-AGC) * Differential IF amplifier (first IF amplifier) * Wide band AGC sensitivity setting pin, and narrow band AGC sensitivity setting pin * Local oscillator circuit (oscillator 1) * AM/FM second mixing oscillator (oscillator 2) * FM second mixing (FM mixer 2)
Continued on next page.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment.
41107 TI IM No.8320-1/4
LV25300M
Continued from preceding page.
* Supports both FM Japan band and US band. * AM first oscillator coil for AM LW, MW, and SW frequency divider circuit, internal frequency divider with reduced number of varactor diode * Weather band FM IF * IF limiter amplifier (IFAMP: Also runs in AM mode.) * S-meter output (shared pin for AM), 6-stage pickup (VSM: for DSP) * Dedicated FM S-meter (for DSP and diversity circuit) * Coilless detector circuit * Digital detection buffer output * IF counter buffer output (also used for AM) * SD (IF counter buffer ON level) adjustment * SD output (active high) (also used for AM) AM * Double balance mixer (first and second) * Elimimated IF amplification (AM 450kHz) AM IFT * Digital detection IF buffer output (also used for FM) * IF AGC (controlled by narrow band S-meter output) * RF AGC (Wide) * Pin diode drive pin (antenna damping) * Wide band S-meter output (shared pin for FM IF) * Narrow band S-meter output (detected by AM IF second amplifier) * IF counter buffer output function (shared pin for FM IF), directly connected to PLL counter * SD (IF counter buffer ON Level) adjustment * SD output (active high) (also used for FM) * AM noise canceller trigger output pin PLL * Charge pump for high-speed locking * Internal FET for active LPF * Low radiation noise due to 3V operation * 4-wire serial bus control circuit (SANYO's original CCB bus format) * Reference divider * Programmable divider (pulse swallow type) * Crystal oscillator circuit - FM band selection signal detection and control circuits - AM, SW1, and SW2 reception - Weather band - AM/FM RF AGC voltage - FM/AM RF DAC (9 bits x 2) * ADC (6/8bits x 2, selectable) Bus control circuit Switching control * AM/FM reception switching * AM/FM RF AGC sensitivity setting: 4 bits * FM keyed AGC control: 4 bits * AM/FM RF tuning DAC (9 bits x 2) * AM/FM SD control ON/OFF * AM/FM IF counter output control ON/OFF * AM oscillator 1 divider setting * SEEK/receive mode switching Automatic adjustment * FM ANT tuning circuit fc control * FM RF tuning circuit fc control * AM/FM IF gain adjustment * FM/AM W-AGC sensitivity adjustment * FM/AM N-AGC sensitivity adjustment * FM S-meter shift * AM/FM SD sensitivity setting * NULL adjustment * AFC band width
Continued on next page.
No.8320-2/4
LV25300M
Continued from preceding page.
Connection to CDSP300 (interface) * AM/FM IF output (450kHz) * AM/FM S-meter output, AC/DC 2 systems * AM-NC gate trigger output
Diversity * Noise amplifier, noise, and AGC circuits * Noise density coefficient circuit * Antenna selection output * Generating a signal for the antenna switching frequency and positioning antenna * Weak electric field detection and antenna positioning
Block Diagram
AM ANT circuit FM ANT tuner circuit FM RF AMP circuit FM RF tuner circuit AM RF AMP circuit BPF MIX COIL
CF 10.7MHz
CF 10.7MHz
AM TRANS
CF 10.7MHz
80 FE
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
1
AM block AM-NC
60
2 3 4 5 6 COIL tuner circuit
ANT-D
FM 1st MIX
AM 1st MIX RF
ANT-D
4.9V REG
AM 1stAMP
59 NC STOP NOIZE AMP SD TRIG 58 NOIZE AGC 57
RF Keyed AGC N AGC W AGC
W AGC
M AGC
S-METER FM Lo/DX AM Lo/DX AM detector
IF AGC 2ndIFAMP
AM 2ndMIX
56 55 CF 450kHz 54
OSC 7
low cut AMP 8 PLL 9 NMOS Tr 10 11 swallow counter P-CTR phase det charge pump ECL 1/4, 1/6 1/8, 1/10 IF COUNTER 6/8bit AD converter R-CTR BUS POWER ON RESET BUSIN 1 IN 2 IN 3-1 IN 3-2 IN 3-3 IN 3-4 FM IF DAC CIRCUIT FM 1stAMP DAC block
DETECTET
Differential AMP2
Differential AMP1
53 52 51 50
LPF 12
S-METER (DC/AC)
Limiter AMP
49
13 14 15 16
48 SD 2ndMIX 47 46
Diversity block ANT selector
AFC
AUDIO CIRCUIT
MUTE CIRCUIT
DETECTER 45
17 18
CURRENT DRIVER COUNTER Time constant generator MAIN FIX CIRCUIT
LOGIC 2.7V REG DIVIDER 3V REG
44 43
19 20
450kHz
42 41
NOIZE AMP
XTAL OSC
450kHz OUTPUT_BUFFER
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
XTAL 10.25MHz
No.8320-3/4
LV25300M
Package Dimensions
unit : mm (typ) 3266
17.2 14.0
0.825
1.6 0.825 41 0.15
0.825 60 61
0.3
0.65
0.3
1.6
40
17.2
14.0 0.65
80
0.825
21 1 20
3.0max
2.7
15.6
0.8
SANYO : QIP80M-E
SANYO Semiconductor Co.,Ltd. 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 Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above.
This catalog provides information as of April, 2007. Specifications and information herein are subject to change without notice.
PS No.8320-4/4

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