Sanyo LV25300M 1-chip tuner ic Datasheet

Ordering number : EN*8320A
LV25300M
Bi-CMOS IC
1-chip Tuner IC
Overview
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 SANYO car audio DSP (SDRS300) 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 × 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)
Continued on next page.
•
•
CCB is a registered trademark of SANYO Electric Co., Ltd.
CCB is SANYO Semiconductor's original bus format. All bus addresses are managed by SANYO
Semiconductor for this format.
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.
N2807 TI IM / 41107 TI IM No.8320-1/4
LV25300M
Continued from preceding page.
• 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)
• 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 × 2)
• ADC (6/8bits × 2, selectable)
No.8320-2/4
LV25300M
Bus control circuit
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
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 × 2)
• AM/FM SD control ON/OFF
• AM/FM IF counter output control ON/OFF
• AM oscillator 1 divider setting
• SEEK/receive mode switching
Connection to CDSP300 (interface)
Diversity
• AM/FM IF output (450kHz)
• AM/FM S-meter output, AC/DC 2 systems
• AM-NC gate trigger output
• 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
80
1
MIX
COIL
AM RF AMP circuit
CF 10.7MHz
CF 10.7MHz
CF 10.7MHz
AM TRANS
BPF
79
78
77
76
75
74
73
72
71
70
69
68
FE
67
66
65
64
63
62
61
AM block
60
AM-NC
2
ANT-D
FM
1st
MIX
3
Keyed
AGC
5
59
AM
1stAMP
TRIG
NC STOP
58
NOIZE
AMP
N AGC
W
AGC
57
W
AGC
SD
M AGC
IF AGC
S-METER
6
COIL
tuner
circuit
NOIZE
AGC
RF
RF
4
4.9V REG
ANT-D
AM
1st
MIX
FM
Lo/DX
OSC
55
2ndIFAMP
AM detector
AM
Lo/DX
56
AM
2ndMIX
CF 450kHz
54
7
low cut
AMP
8
Differential
AMP1
DAC block
PLL
9
ECL
1/4, 1/6
1/8, 1/10
POWER ON
RESET
BUS-
IF COUNTER
IN 1
IN 2
IN 3-1
IN 3-2
IN 3-3
IN 3-4
NMOS Tr
10
swallow
counter
11
LPF
12
P-CTR
6/8bit AD
converter
13
phase
det
R-CTR
53
52
51
FM IF
50
DAC
CIRCUIT
S-METER
(DC/AC)
FM
1stAMP
Limiter
AMP
49
48
SD
2ndMIX
BUS
charge
pump
14
47
46
15
16
Differential
AMP2
DETECTET
AUDIO
CIRCUIT
AFC
Diversity block
MUTE
CIRCUIT
DETECTER
45
ANT selector
17
18
19
CURRENT
DRIVER
44
LOGIC
2.7V REG
COUNTER
Time constant
generator
DIVIDER
43
450kHz
42
3V REG
20
MAIN FIX
CIRCUIT
21
22
XTAL
OSC
NOIZE AMP
23
24
25
26
27
28
29
30
31
450kHz
OUTPUT_BUFFER
32
33
34
35
36
41
37
38
39
40
XTAL 10.25MHz
No.8320-3/4
LV25300M
Package Dimensions
unit : mm (typ)
3266
17.2
1.6
0.825
14.0
0.65
0.825
0.825
0.3
0.15
41
61
40
80
21
14.0
1
20
15.6
3.0max
0.65
0.825
17.2
0.3
1.6
60
2.7
0.8
SANYO : QIP80M-E
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products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
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products described or contained herein.
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semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
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This catalog provides information as of November, 2007. Specifications and information herein are subject
to change without notice.
PS No.8320-4/4
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