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| Ordering number : EN4416A Monolithic Linear IC LA2232, 2232M RDS Decorder Overview The LA2232 and LA2232M are RDS demodulator ICs that provide both a 57 kHz bandpass filter as well as ARISK and DK signal recognition functions on chip. Costeffective RDS decoder systems can be constructed by using an LA2232 or 2232M in conjunction with a synchronization and error detection/correction LSI from the LC7070 series. The LA2232 and 2232M provide improved sensitivity LA2230 and 2230M. Package Dimensions unit: mm 3067-DIP24S [LA2232] Applications * RDS signal demodulation * ARI signal demodulation and SK and DK recognition Functions * * * * * * * * 57 kHz bandpass filter RDS signal demodulation Bit rate clock regeneration RDS identification output ARI signal demodulation SK identification output DK identification output Adjustable ARI detection sensitivity SANYO: DIP24S unit: mm 3112-MFP24S [LA2232M] Features * High RDS demodulation sensitivity * Reduced costs and PCB area due to the inclusion of an on-chip 57 kHz bandpass filter * Supports improved interference rejection characteristics by providing ARI detection sensitivity adjustment * Quick operation startup due to a built-in rapid charging circuit for use at power application. SANYO: MFP24S SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 21097HA(OT) No. 4416-1/9 LA2232, 2232M Specifications Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Allowable power dissipation Entering current Operating temperature Storage temperature Symbol VCC max Pd max ILED Topr Tstg LA2232 LA2232M Conditions Pins 13, 14, 15, 23 LA2232: LA2232M: LA2232M: Ta 80C Ta 37.5C Ta = 80C Ratings 12 450 450 280 20 -30 to +80 -40 to +125 -40 to +150 Unit V mW mW mW mA C C C Pins 13, 14, 15 Operating Conditions at Ta = 25C Parameter Recommended supply voltage Operating voltage range Symbol VCC VCC op Pin 23 Pin 23 Conditions Ratings 5.0 4.7 to 5.5 Unit V V Operating Characteristics at Ta = 25C, VCC = 5.0 V Ratings Parameter Quiescent current Band pass filter gain Band pass filter selectivity f = 57 kHz f = 60 kHz (57 kHz = 0 dB) f = 54 kHz (57 kHz = 0 dB) f = 38 kHz (57 kHz = 0 dB) 5 mVrms CW input The pin 6 input when pin 15 goes low The pin 6 input when pin 14 goes low The pin 6 input when pin 13 goes low The maximum input on pin 6 for the (ARI + RDS) signal when pin 15 goes low RDS Input dynamic range DK Bit rate clock jitter RDS lockup time SK lockup time SK + RDS lockup time Data output The time until pin 15 goes low following RDS becoming a 3 mV input The time until pin 14 goes low following ARI becoming an 8 mV input The time until pin 15 goes low following RDS + ARI becoming an 8.5 mV input The high level for pin 17 The low level for pin 17 Bit rate clock output VCO free-running frequency The high level for pin 18 The low level for pin 18 4.7 0 4.7 0 453 The maximum input on pin 6 for the RDS signal when pin 15 goes low The maximum input on pin 6 for the ARI signal when pin 15 goes low 30 250 75 8 100 9 35 45 10 Symbol min 14 9 -6 -6 typ 22 12.5 -2.5 -3.5 -39 -0.5 +0.8 0.4 1.0 1.1 50 1.0 2.0 2.0 max 28 17 0 0 -33 Unit mA dB dB dB dB % % mVrms mVrms mVrms mVrms mVrms mVrms s ms ms PLL capture range RDS detection sensitivity SK detection sensitivity DK detection sensitivity 80 4.9 0.1 4.9 0.1 456 5.0 0.3 5.0 0.3 459 ms V V V V kHz No. 4416A-2/9 LA2232, 2232M Equivalent Circuit Block Diagram Test Circuit *R = 6.8 k (for the LA2232) R = 5.6 k (for the LA2232M Unit (resistance: , capacitance: F) No. 4416A-3/9 LA2232, 2232M Sample Application Circuit Using the LA2232/M and the LC7073/M 3 to 6 mVrms Recommended input signal level (when RDS f = 2.0 kHz) *R = 6.8 k (for the LA2232) R = 5.6 k (for the LA2232M) Bi-phase signal Adjusting the 57 kHz BPF (A) Check the output level of the bi-phase signal from pin 4 or pin 22 (with the pin 6 RDS input at about 1 mVr ms and the ALC circuit not operating). (B) Check the signal level of the BPF checkpoint (with the pin 6 RDS input in the range 3 to 6 mVrms or higher). No. 4416A-4/9 LA2232, 2232M ARI Decoder Application Circuit *R = 6.8 k (for the LA2232) R = 5.6 k (for the LA2232M) Unit (resistance: , capacitance: F) No. 4416A-5/9 LA2232, 2232M * For the LA2232, an input level of under 300 mVr ms on pin 6 is desirable for a 100% FM demodulation output. * We recommend the use of a pre-high pass filter as shown in the figure below if the 100% FM demodulation output level is over 300 mVrms. FM demodulation signal input To the LA2232 pin 6 RDS-ID (LA2232), RECEIVE-ID (LC7073) Detection Time (the RECEIVE-ID indicates synchronization completion). No. 4416A-6/9 LA2232, 2232M No. 4416A-7/9 LA2232, 2232M RDS Application IC Lineup (1) (2) No. 4416A-8/9 LA2232, 2232M s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s 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 July, 1997. Specifications and information herein are subject to change without notice. No. 4416A-9/9 |
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