LA1225MC [SANYO]
Monolithic Linear IC FM IF Detector IC; 单片线性IC调频中频检测器IC
| 型号： | LA1225MC |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Monolithic Linear IC FM IF Detector IC |
| 文件： | 总8页 (文件大小：638K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENA2052
Monolithic Linear IC
FM IF Detector IC
LA1225MC
Overview
The LA1225MC is a Low-voltage operation (1.8V or higher) FM IF detector IC for the electronic tuning system.
Features
• Low-voltage operation (1.8V or higher)
• Supports electronic tuning systems (provides built-in SD output and IF count output functions)
• FM detector circuit accepts an even wider input frequency range. (Supports the use of an external phase capacitor.)
• Miniature package: SOIC10
Functions
• IF amplifier
• Quadrature detector
• Signal meter
• SD
• IF buffer
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
Conditions
Ratings
Unit
V
V
max
9.0
100
CC
Pd max
Ta ≤ 85°C
mW
°C
Topr
Tstg
-20 to +85
-55 to +150
°C
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Recommended supply voltage
Operating supply voltage range
V
3.0
CC
V
op
1.8 to 8.0
V
CC
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. 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 new introduction or other application different
from current conditions on the usage of automotive device, communication device, office equipment, industrial
equipment etc. , please consult with us about usage condition (temperature, operation time etc.) 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.
41812 SY 20120411-S00004 No.A2052-1/8
LA1225MC
Operating Characteristics at Ta = 25°C, V
= 3.0V, f = 10.7MHz
CC
C
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
3.0
max
5.0
Current drain
I
No input
4.0
mA
mV
%
CCO
Demodulator output
Total harmonic distortion
Signal-to-noise ratio
3dB sensitivity
V
100dBμV, 100% mod., fm = 1kHz
100dBμV, 100% mod., fm = 1kHz
100dBμV, 100% mod., fm = 1kHz
70
150
0.5
73
220
0.8
O
THD
S/N
65
19
dB
-3dBL.S
100dBμV, 100% mod.,
28
37
dBμV
fm = 1kHz output reference, when the input is -3dB
0% mod.
SD sensitivity
SD
ON
35
90
50
65
dBμV
IF counter buffer output
V
100dBμV
130
170
mV
IFBuff
Package Dimensions
Unit : mm
3426
5.0
10
6
1
5
0.35
1.0
0.15
SANYO : SOIC10
No.A2052-2/8
LA1225MC
Block Diagram and Test Circuit
STRQ IF Buff
DET OUT
SD
10
9
8
7
6
SD
IF Buff
DET
IF Amp
S-METER
Reg
2
GND
3
V
CC
5
1
4
FM IF IN
V
V
CC
SM
+
+
+
Sample Application Circuit
3.3k
SD
DET OUT
STRQ
DETcoil;
YT-30103
10k
3.9k
IF Buff
0.015 μF
0.047μF
3.0V
1000pF
2pF
10
9
8
7
6
LA1225MC
1
2
3
4
5
330
FM IF IN
V
V
= 3.0V
CC
SM
0.047μF
+
+
+
75
10μF
0.047μF
1μF
15k
100μF
0.047μF
No.A2052-3/8
LA1225MC
Pin Functions No-Signal Voltage at V
= 3.0V
CC
No-signal
Pin No.
1
Function
IF input
Equivalent circuit
Notes
voltage (V)
1.2
Input impedance
= 330Ω
R
IN
2
Reg
1.2
Vreg = 1.2V
3
4
GND
0
S-meter output
0.1
Open collector output.
The SD sensitivity can be adjusted with an
external resistor connected to this pin.
5
6
V
3.0
1.5
CC
Demodulated output
Output impedance
R
= 3kΩ
OUT
7
DET
3.0
The detector coil is inserted between pin 7
and pin 5 (V ).
CC
Continued on next page.
No.A2052-4/8
LA1225MC
Continued from preceding page.
No-signal
voltage (V)
Notes
Pin No.
8
Function
Equivalent circuit
Limiter amplifier output
2.8
Pin 8 and pin 7 (DET) are connected through
a capacitor.
9
IF buffer
0
The IF buffer output is turned on when the
voltage applied to the pin is the
(Also used for control SW)
recommended 1.5V or higher.
10
SD
1.6
This is an active-low output.
This is an open-collector output and can
directly drive an LED. (I max = 20mA)
C
No.A2052-5/8
LA1225MC
No.A2052-6/8
LA1225MC
PS No.A2052-7/8
LA1225MC
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.
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, 2012. Specifications and information herein are subject
to change without notice.
PS No.A2052-8/8
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