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Ordering number:ENN3890A
Monolithic Linear IC
LA8604M
Narrowband FM IF Stage
Overview
The LA8604M is a narrowband FM IF stage IC that incorporates all the functional blocks for a complete IF stage, including noise filtering, making it ideal for use in cordless telephones. The LA8604M comprises a second-stage oscillator, a mixer, an IF amplifier, an FM detector, and noise detector, amplifier and rectifier circuits. A signal level meter output which is linear over a wide dynamic range of up to 70dB is also incorporated. The LA8604M operates from a 2.4 to 6V supply and is available in 24-pin MFPs.
Package Dimensions
unit:mm 3112A-MFP24S
[LA8604M]
24 13
5.4
12.5
0.15
Features
* On-chip mixer, IF amplifier and limiter. * On-chip noise filter buffer. * 70dB (typ) signal level meter linearity. * Signal level meter output buffer. * 2.4 to 6V supply. * 24-pin MFP.
0.35 1.0
0.1 1.5
(0.75)
SANYO : MFP24S
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Maximum power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Conditions Ratings 8 300 -20 to +75 -40 to +125 Unit V mW
0.63
1
12
1.7max
7.6
C C
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Conditions Ratings 3 2.4 to 6.0 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
51001TN (KT)/9181TS No.3890-1/7
LA8604M
Operating Characteristics at Ta = 25C, VCC=3V, fC=21.7MHz, fmod=1kHz, f=3kHz
Parameter Quiescent current -3dB limiting sensitivity Demodulation output voltage Signal-to-noise ratio Amplitude modulation rejection ratio Total harmonic distortion Noise detector output voltage Schmitt-trigger level Schmitt-trigger hysteresis Schmitt-trigger output voltage Symbol ICCO -3dBLS VO S/N AMR THD VND SH SHhy VSH VI=10dB VI=25dB VI=5dB Signal meter output voltage VSM VI=50dB VI=80dB RSSI output voltage Mixer conversion gain Mixer input frequency Mixer input resistance Mixer output resistance IF amplifier input resistance FM detector output impedance 3.6 1.8 1.8 2.4 VRSSI GM VI=5dB VI=35dB 20 90 0.8 1.3 2.8 0.5 2.8 0.1 1.1 1.6 0.3 1.4 2.0 Conditions Ratings min typ 2.8 VI=80dB, -3dB input VI=80dB VI=80dB, zero modulation VI=20dB, zero modulation 30% AM modulation VI=80dB VI=10dB VI=30dB 10 115 54 20 30 1.1 5 170 60 25 40 0.7 1.4 0 18 1 0.5 0.1 25 2.0 max 3.8 11 230 Unit mA dB mV dB dB dB % V V dB dB V V V V V V V dB MHz k k k k
Block Diagram
No.3890-2/7
LA8604M
Pin Assignment
Pd max - Ta
Maximum power dissipation, Pd max - mW
Ambient temperature, Ta - C
Top view
Pin Functions
Number Name Equivalent circuit Description
1
OSC1
Colpitts oscillator crystal connection. Nominal voltage is VCC.
2
OSC2
Colpitts oscillator crystal connection. Nominal voltage is VCC-0.7V.
3
VREF
1.2V reference voltage output.
4
MIXOUT
Mixer buffer output. Nominal voltage is VCC-0.3V.
5
VCC IFIN
Supply voltage.
6
IF amplifier input. Nominal voltage is VCC-0.9V.
7
DC1 IF amplifier feedback network connections. Nominal voltage is VCC-0.9V.
8
DC2
Continued on next page. No.3890-3/7
LA8604M
Continued from preceding page.
Number Name Equivalent circuit Description
9
COMP+
RSSI comparator threshold input.
10
RSSI
Open-collector, RSSI comparator output.
11
LIMOUT
Limiter amplifier output. Nominal voltage is 0.2V.
12
QUADCOIL
Detector tuning network connection. Nominal voltage is VCC.
13
SCHMOUT
Open-collector, noise comparator Schmitt-trigger output.
14
SDET
Signal strength detector output. Nominal voltage is in the range 0.1 to 1.5V.
15
DETOUT
FM detector output. Nominal voltage is 1.2V.
16
IN1
Operational amplifier 1 inverting input. Nominal voltage is 1.0V.
17
OUT1
Operational amplifier 1 output. Nominal voltage is 1.0V.
18
IN2
Operational amplifier 2 inverting input. Nominal voltage is 1.0V.
19
OUT2
Operational amplifier 2 output. Nominal voltage is 1.0V.
Continued on next page.
No.3890-4/7
LA8604M
Continued from preceding page.
Number Name Equivalent circuit Description
20
IN3
Operational amplifier 3 inverting input. Nominal voltage is 1.0V.
21
OUT3
Operational amplifier 3 output. Nominal voltage is 1.0V.
22
NRDET
Noise detector output. Nominal voltage is in the range 0 to 1.4V.
23
GN D
Ground
24
MIXIN
Mixer input. Nominal voltage is 1.2V.
Test Circuit
No.3890-5/7
LA8604M
Sample Application Circuits
Figure 1. Crystal detector
No.3890-6/7
LA8604M
Figure 2. LC network detector
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 expor ted without obtaining the expor t 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 May, 2001. Specifications and information herein are subject to change without notice.
PS No.3890-7/7

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