KKA1238NS中文资料

TECHNICAL DATA

KK A1238NS FM/AM STEREO RADIORECEIVER

DESCRIPTION

KK A1238NS is a high performance one - chip bipolar ICS designed for FM/AM stereo radios. These include an FM/AM

front end, FM/AM IF amplifier, FM/AM detection output and FM stereo demodulator output. Bipolar silicon monolithic IC. FEATURES

?Low current consumption

(In FM mode I D = 11.0 mA, in AM mode 8.5 mA,

V CC = 6.0V).

?Built - in LED drive circuit for tuning.

?Built - in LED drive circuit for stereo indicator.

?Built - in detune muting circuit for the FM band.

?Few external parts.

ELECTRICAL CHARACTERISTICS(T A = 25°C)

Symbol Parameter Test Conditions Guaranteed Limits Unit

Min

Typ

Max

I D1/D2AM/FM circuit current No signal AM/FM 8.5/11 12.0/

15.0

mA

G V1FM front end voltage gain V IN1 = 40dBmV, 100MHz 28 35 42 dB

V D1/D3FM/AM detection output level 35 77.5 138 V RMS

V D2FM IF knee level 25 31 dBmV

T HD1/HD2FM/AM detection output

distortion factor 0.3/0.6

2.0

%

G V2AM front end voltage gain V IN2 = 60dBmV, 1660kHz 19 24 28 dB

G V3AM IF voltage gain 15 21 29 dB SEP Separation 30 40 dB

VI1M/ST switching level by IF input 38

43

48

dBmV

A1FM Mute Vin5=245mVrms,

MONO,1kHz ATT

16 23 30 dB

BLOCK-SCHEME

DISCRI

VCO

REGULATOR MULTIPLEX COUNTER

1/2PD2

PD1SW M/ST A MP DECODE MUTING

BLEND

AUTO FILTER

RIPPLE BU BU A MP AMP AMP AMP AMP

DC TUNING IND

CONTROL MUTING DETUNE AM IF DET

FM IF REGULATOR

AM FE

FM FE

2928272625242322212019181716

15

141312

11

10

9

8765432130

APPLICATION CIRCUIT

4.7

30-Pin Plastic Dual-in-Line (NS)

A max 5.08A ?min 0.51min 3.05max 4.57min 0.36max 0.58min 0.76max 1.40min 0.20max 0.36min 26.67max 28.49min 9.91max 11.05min 7.62max 9.40e nom 1.778e 2nom 10.16min 2.54max 3.81min 0omax 10o

L α

Dimension, mm

A 2

B B 2

C

D

E E 1