SANYO LA2232M, LA2232 Datasheet

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.

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

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.

Package Dimensions

unit: mm

3067-DIP24S

unit: mm

3112-MFP24S

Ordering number : EN4416A

21097HA(OT) No. 4416-1/9

SANYO: DIP24S

[LA2232]

SANYO: MFP24S

[LA2232M]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

RDS Decorder

LA2232, 2232M

Monolithic Linear IC

No. 4416A-2/9

LA2232, 2232M

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

CC

max Pins 13, 14, 15, 23 12 V

LA2232: Ta ≤ 80°C 450 mW

Allowable power dissipation Pd max LA2232M: Ta ≤ 37.5°C 450 mW

LA2232M: Ta = 80°C 280 mW

Entering current I

LED

Pins 13, 14, 15 20 mA

Operating temperature Topr –30 to +80 °C
Storage temperature Tstg

LA2232 –40 to +125 °C
LA2232M –40 to +150 °C

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage V

CC

Pin 23 5.0 V

Operating voltage range V

CC

op Pin 23 4.7 to 5.5 V

Operating Characteristics at Ta = 25°C, VCC= 5.0 V

Ratings

Parameter Symbol

min typ max

Unit

Quiescent current 14 22 28 mA
Band pass filter gain f = 57 kHz 9 12.5 17 dB

f = 60 kHz (57 kHz = 0 dB) –6 –2.5 0 dB

Band pass filter selectivity f = 54 kHz (57 kHz = 0 dB) –6 –3.5 0 dB

f = 38 kHz (57 kHz = 0 dB) –39 –33 dB

PLL capture range 5 mVrms CW input

–0.5 %

+0.8 %
RDS detection sensitivity The pin 6 input when pin 15 goes low 0.4 1.0 mVrms
SK detection sensitivity The pin 6 input when pin 14 goes low 1.0 2.0 mVrms
DK detection sensitivity The pin 6 input when pin 13 goes low 1.1 2.0 mVrms

The maximum input on pin 6 for the (ARI + RDS)

30 50 mVrms

RDS

signal when pin 15 goes low

Input dynamic range

The maximum input on pin 6 for the RDS signal

250 mVrms

when pin 15 goes low

DK

The maximum input on pin 6 for the ARI signal

75 100 mVrms

when pin 15 goes low

Bit rate clock jitter ±8 ±9 ±10 µs
RDS lockup time

The time until pin 15 goes low following RDS

35 ms

becoming a 3 mV input

SK lockup time

The time until pin 14 goes low following ARI 45 ms
becoming an 8 mV input

SK + RDS lockup time

The time until pin 15 goes low following RDS +

80 ms

ARI becoming an 8.5 mV input

Data output

The high level for pin 17 4.7 4.9 5.0 V
The low level for pin 17 0 0.1 0.3 V

Bit rate clock output

The high level for pin 18 4.7 4.9 5.0 V
The low level for pin 18 0 0.1 0.3 V

VCO free-running frequency 453 456 459 kHz

Equivalent Circuit Block Diagram

Test Circuit

No. 4416A-3/9

LA2232, 2232M

*R = 6.8 kΩ (for the LA2232)

R = 5.6 kΩ (for the LA2232M

Unit (resistance: Ω, capacitance: F)