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 Ordering number : ENN6017
Monolithic Linear IC
LA1225M
FM IF Detector IC
Functions
* * * * * IF amplifier Quadrature detector Signal meter SD IF buffer
Package Dimensions
unit: mm 3086A-MFP10S
[LA1225M]
10 6 0.625 1.8 max 0.15 0.55 0.1 1.5
Features
* Low-voltage operation (1.8 V 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: MFP-10S
5.15 6.4 4.4 1 5.1 5 0.35 1.0
SANYO: MFP10S
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Ta 80C Conditions Ratings 9.0 100 -20 to +80 -55 to +150 Unit V mW C C
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Conditions Ratings 3.0 1.8 to 8.0 Unit V V
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
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
32400TN (OT) No. 6017-1/8
LA1225M Operating Characteristics at Ta = 25C, VCC = 3.0 V, fc = 10.7 MHz
Parameter Current drain Demodulator output Total harmonic distortion Signal-to-noise ratio 3 dB sensitivity SD sensitivity IF counter buffer output Symbol ICCO VO THD S/N -3 dBL.S SDON VIFBuff No input 100 dB, 100% mod., fm = 1 kHz 100 dB, 100% mod., fm = 1 kHz 100 dB, 100% mod., fm = 1 kHz 100 dB, 100% mod., fm = 1 kHz output reference, when the input is -3 dB 0% mod. 100 dB 65 19 35 90 Conditions Ratings min 3.0 70 typ 4.0 150 0.5 73 28 50 130 37 65 170 max 5.0 220 0.8 Unit mA mV % dB dB dB mV
Pin Functions and No-Signal Voltage at VCC = 3.0 V
Pin No. Function Notes No-signal voltage (V) Equivalent circuit
1
Input impedance 1 IF input RIN = 330 1.2
RIN 2
A11506
2
Reg
Vreg = 1.2 V
1.2
2
A11507
3
GND
0
Open collector output 4 S-meter output The SD sensitivity can be adjusted with an external resistor connected to this pin. 0.1
4
A11508
5
VCC
3.0
Output impedance 6 Demodulated output ROUT = 3 k 1.5
ROUT 6
A11509
Continued on next page.
No. 6017-2/8
LA1225M
Continued from preceding page.
Pin No. Function Notes No-signal voltage (V) Equivalent circuit
7
7
DET
The detector coil is inserted between pin 7 and pin 5 (VCC).
3.0
A11510
8
8
Limiter amplifier output
Pin 8 and pin 7 (DET) are connected through a capacitor.
2.8
A11511
9 IF buffer output
The IF buffer output is turned on when the voltage applied to the (Also used for control SW) pin is the recommended 1.5 V or higher. IF buffer
9
0
Control SW
A11512
10
This is an active-low output. 10 SD This is an open-collector output and can directly drive an LED. (ICmax = 20 mA) 1.6
A11513
No. 6017-3/8
Block Diagram
STRQ
IF Buff
DET OUT
SD
10
9
8
7
6
SD
IF Buff
DET
LA1225M
IF Amp S-METER Reg GND VCC
1
2
3
4
5
FM IF IN
+ +
VSM
+
VCC
A11514
No. 6017-4/8
3.3k STRQ 10k IF Buff 3.0V 1000pF 2pF 9 8 7 6 0.015 F 3.9k DETcoil; YT-30103 DET OUT
Sample Application Circuit
SD
0.047 F
10
LA1225M
LA1225M
1
2
3
4
5
FM IF IN
+ +
330 VSM 15k 100 F
+
75
0.047 F 0.047 F 1 F
VCC = 3.0V 0.047 F
10 F
A11515
No. 6017-5/8
LA1225M
I/O Characteristics
0 5
I/O Characteristics
2.5
Signal
-20
Total harmonic distortion, THD -- %
4
2
-40
3
1.5
-60
AM out
2
1
-80
VCC=3.0V fC=10.7MHz fm=1kHz, 75kHzdev
20 40 60
1
0.5
Noise
80 100 120 140
THD
0 0 20 40 60 80 100 120 0 140
-100 0
Input -- dB
0
Input -- dB
100
VO -- VCC Signal-to-noise ratio, S/N -- dB
VIN=100dB fC=10.7MHz fm=1kHz, 75kHzdev
S/N -- VCC
VIN=100dB fC=10.7MHz fm=1kHz, 75kHzdev
Output voltage, VO -- dBm
-5
90
-10
80
-15
70
-20
-25
60
-30 0
2
4
6
8
10
50 0
2
4
6
8
10
Supply voltage, VCC -- V THD -- VCC
5 50
Supply voltage, VCC -- V -3dBLS, QS -- VCC Sensitivity (-3 dB LS, QS) -- dB
45 40 35 30 25 20 15 10 5 0 0 1 2 3 4 5 6 7 8 9 10
Total harmonic distortion, THD -- %
4
VIN=100dB fC=10.7MHz fm=1kHz, 75kHzdev
VIN=100dB fC=10.7MHz fm=1kHz, 75kHzdev
3
LS QS
2
1
0 0
1
2
3
4
5
6
7
8
9
10
Supply voltage, VCC -- V SDON -- VCC
100 90 80 70 220
Supply voltage, VCC -- V VIFBuff -- VCC IF counter buffer output, VIFBuff -- mV
200 180 160 140 120 100 80 60 0
fC = 10.7 MHz unmodulated
VIN=100dB fC = 10.7 MHz unmodulated
SDON -- dB
60 50 40 30 20 10 0 0 1 2 3 4 5 6 7 8 9 10
1
2
3
4
5
6
7
8
9
10
Supply voltage, VCC -- V
Supply voltage, VCC -- V
No. 6017-6/8
S-meter voltage, VSM -- V
VCC=3.0V fC=10.7MHz fm=1kHz, 75kHzdev
VSM
Output -- dBm
LA1225M
ICCO -- VCC
6 0
VO -- Ta
VCC=3.0V VIN=100dB fC=10.7MHz fm=1kHz, 75kHzdev
Quiescent current, ICCO -- mA
5
Output voltage, VO -- dBm
-5
-10
4
-15
3
-20
2
-25
1 0
2
4
6
8
10
-30 -40
-20
0
20
40
60
80
100
Supply voltage, VCC -- V S/N -- Ta
100 5
Ambient temperature, Ta -- C THD -- Ta Total harmonic distortion, THD -- %
Signal-to-noise ratio, S/N -- dB
90
VCC=3.0V VIN=100dB fC=10.7MHz fm=1kHz, 75kHzdev
4
VCC=3.0V VIN=100dB fC=10.7MHz fm=1kHz, 75kHzdev
80
3
70
2
60
1
50 -40
-20
0
20
40
60
80
100
0 -40
-20
0
20
40
60
80
100
Ambient temperature, Ta -- C -3dBLS, QS -- Ta
50 80
Ambient temperature, Ta -- C SDON -- Ta
VCC=3.0V fC=10.7MHz unmodulated
Sensitivity (-3 dB LS, QS) -- dB
40
VCC=3.0V VIN=100dB reference fC=10.7MHz fm=1kHz, 75kHzdev -3dBLS QS
70
30
SDON -- dB
60
20
50
10
40
0 -40
-20
0
20
40
60
80
100
30 -40
-20
0
20
40
60
80
100
Ambient temperature, Ta -- C VIFBuff -- Ta
10 6
Ambient temperature, Ta -- C ICCO -- Ta
VCC=3.0V
IF counter buffer output, VIFBuff -- dB
8 6 4 2 0 -2 -4 -6 -8 -10 -40 -20 0 20 40
Quiescent current, ICCO -- mA
100
VCC=3.0V VIN=100dB fC=10.7MHz (25C=0dB)
5
4
3
2
60
80
1 -40
-20
0
20
40
60
80
100
Ambient temperature, Ta -- C
Ambient temperature, Ta -- C
No. 6017-7/8
LA1225M
Specifications of any and all SANYO 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. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or 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 products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining 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 permission of SANYO Electric 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 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. 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 March, 2000. Specifications and information herein are subject to change without notice. PS No. 6017-8/8


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