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Ordering number:ENN3988A
Monolithic Linear IC
LA2230, 2230M
RDS Decoder
Overview
The LA2230 and LA2230M are RDS demodulator ICs with an on-chip 57kHz bandpass filter and ARI-SK and DK signal identifiers. A high-performance, cost-effective RDS decoder system with group/block synchronization and error detection/correction can be built using an LC7070 series device with the LA2230 or LA2230M. LA2230 and LA2230M feature adjustable ARI detection sensitivity for improved interference rejection and a highspeed charging circuit for rapid power-on start-up. Including the 57kHz bandpass filter on-chip results in lower-cost designs that use less PCB area. The LA2230 and LA2230M operate from a 5V supply and are avilable in 24-pin DIPs and 24-pin MFPs, respectively.
Package Dimensions
unit:mm 3067-DIP24S
[LA2230]
24 13
7.62 6.4
1 21.2
12
0.51min
Features
* 57kHz bandpass filter. * Adjustable ARI detection sensitivity. * High-speed charging circuit. * ARI and RDS signal demodulation. * Bit-rate clock recovery. * RDS, DK and SK identification outputs. * 5V supply. * 24-pin DIP (LA2230) and 24-pin MFP (LA2230M)
0.81
1.78
0.48
0.95
SANYO : DIP-24S
unit:mm 3112-MFP24S
[LA2230M]
24 13
3.3
3.9max
3.25
1.8max
12.6
1.5
0.15
0.35
1.0 0.8
0.1
SANYO : MFP-24S
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
11200TH (KT)/2272/TS No.3988-1/6
0.625
1
12
6.35 7.6
5.4
0.25
LA2230, 2230M
Block Diagram
Pin Description
Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Name DK-FLT Q-DET NC I-DET BYPASS INPUT SK-FLT RDS-FLT PLL-FLT FLT-SW BPF-ADJ GND DK-ID SK-ID RDS-ID SK-ADJ DATA CLK DPLL INTEG/D BEF1 BEF2 VCC OSC Description DK in-phase detector lowpass filter connection. Quadrature detection output No connection. Should be left open. In-phase detector output Bandpass filter bypass capacitor connection ARI and RDS signal input SK lowpass filter capacitor connection RDS lowpass filter capacitor connection PLL loop filter connction PLL loop filter switch Bandpass filter adjustment variable resistor connection Ground ARI-DK signal identification output ARI-SK signal identification output RDS signal identification output ARI detection sensitivity adjustment variable resistor connection Data output Bit-rate clock output Digital PLL lowpass filter connection Integrator and dump capacitor connection Band-elimination filter connections 5V supply Ceramic resonator connection
No.3988-2/6
LA2230, 2230M Specifications
Absolute Maximum Ratings
Parameter Supply voltage Power dissipation Operating temperature range Storage temperature range Symbol VCC max Pd max Topr Tstg LA2230 : Ta80C LA2230M : Ta37.5C LA2230M : Ta=80C Conditions 13, 14, 15, and 23 pin Ratings 12 450 450 280 -30 to +80 -40 to +125 (LA2230) -40 to +150 (LA2230M) C C mW Unit V
Recommended Operating Conditions at Ta = 25C
Parameter Supply voltage Supply voltage range Symbol VCC VCC op 23 pin 23 pin Conditions Ratings 5 4.7 to 5.5 Unit V V
Electrical Characteristics at Ta = 25C, VCC=5V
Parameter Quiescent supply current RDS detection sensitivity SK detection sensitivity DK detection sensitivity Symbol ICCO VI1 VI2 VI3 VI4 RDS detection maximum input signal VI5 DK detection maximum input signal CLK and DATA LOW-level output voltage CLK and DATA HIGH-level output voltage Bandpass filter voltage gain Bandpass filter attenuation VI6 VOL VOH VG VINPUT=minimum signal for HIGH-to-Low transition on RDS-ID VINPUT=minimum signal for HIGH-to-Low transition on SK-ID VINPUT=minimum signal for HIGH-to-Low transition on SK-ID VINPUT=maximum (ARI + RDS) signal for HIGH-toLow transition on RDS-ID VINPUT=maximum RDS signal for RDS data correctly demodulated VINPUT=maximum ARI signal for HIGH-to-Low transition on DK-ID Conditions Ratings min 14 typ 22 0.4 1.0 1.1 30 250 75 0 4.7 f=57kHz f=60kHz. See note 1. f=54kHz. See note 1. f=38kHz. See note 1. PLL capture range Bit-rate clock jitter RDS lock-up time SK lock-up time SK + RDS lock-up time VCO free-running frequency BPF adjustment resistance CR tj Period from VINPUT=3mV RDS signal to HIGHtRDS toLOW transition on RDS-ID Period from VINPUT=8mV ARI signal to HIGHtSK toLOW transition on SK-ID Period from VINPUT=8.5mV (ARI + RDS) signal to tSK + RDS HIGH-toLOW transition on RDS-ID fVCO RADJ 453 VINPUT=100mV at 57kHz. See note 2. 5.6 Low side, VINPUT=5mV sine wave High side, VINPUT=5mV sine wave 8 9.0 0 0 33 100 0.1 4.9 12.5 2.5 3.5 39 -0.9 1.5 9 35 45 80 456 8.0 459 10.6 1 0 0.3 5.0 17.0 6.0 6.0 50 max 28 1.0 2.0 2.0 Unit mA mV mV mV mV mV mV V V dB dB dB dB % s ms ms ms kH z k
Notes 1. 0dB is referenced to the filter output with f=57kHz. 2. Resistance between BPF-ADJ and GND when VBYPASS is at its maximum.
No.3988-3/6
LA2230, 2230M Typical Performance Characteristics
Maximum power dissipation vs. ambient temperature
Pin Assignment
Test Circuit
Notes R=1.2M for the LA2230, and 1.5M for the LA2230M.
Operating Information
57kHz Bandpass Filter Adjustment 1. Adjust the variable resistor connected to BPF-ADJ to obtain the maximum signal level measured at I-DET or BEF2. 2. When VINPUT=1mV RDS signal, check I-DET or BEF2 for a bi-phase output signal as shown in the following figure. Note that the ALC circuit will not operate when VINPUT 1mV.
3. Check the BPF checkpoint signal level when VINPUT=3 to 6mV or greater RDS signal.
No.3988-4/6
LA2230, 2230M
Typical Application The recommended input is a 3 to 6mV RDS signal with f=2kHz.
Notes R=1.2M for the LA2230, and 1.5M for the LA2230M.
No.3988-5/6
LA2230, 2230M
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 January, 2000. Specifications and information herein are subject to change without notice.
PS No.3988-6/6

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