CXA1191 ARTSCHIP | Alldatasheet
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CXA1191_ LINEAR INTEGRATED CIRCUIT FM/AM Radio DESCRIPTION <gé The CXA1191 is a one-chip FM/AM radio IC designed Kg SOP-28 for radio-cassette tape recorders and headphone tape recorders.
FEATURES
*Small number of peripheral components *Low current consumption (Vcc=3V) FM: |p=5.3mA (Typ.) AM: 1,5=3.4mA (Typ.) *Built-in FM/AM select switch *Large current of AF amplifier DIP-28 FUNCTIONS FM section RF amplifier, Mixer and OSC (incorporating AFC variable capacitor) IF amplifier Quadrature detection Tuning LED driver AM section RF amplifier, Mixer and OSC (with RF AGC) IF amplifier (with IF AGC) Detector Tuning LED driver AF section Electronic volume control FM muting Structure Bipolar silicon monolithic IC ABSOLUTE MAXIMUM RATINGS«ta=25°c) Supplyvoltage ce ftovencowerssepin TL cocoon | 1000 (DIP-28) www.artschip.com
RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL VALUE UNIT Supply voltage BLOCK DIAGRAM Ll 7 a286e8 6) ~ oe (awe Tey t _ J in MOTE py cet nF Ye ees Are gee ge ae rae Ih Ne en ae ae www.artschip.com
PIN SYMBOL VOLTAGE(V) EQUIVALENT CIRCUIT DESCRIPTION | 4 (mute Po /oljoflof] J] 2 FM DISCRI 2.18 27 4.88 5.43 Phasesshift circuit, Connect ceramic 1K os discriminator. Vee Negative feedback pin x100 27 AF OUT 1.5 15 3.0 3.0 Power amplifier output pin ° + x00 ~ GND 4 VOL CONT 1.25 1.25 1.25 1.25 Connect variable resistor 20K for electronic volume = control. sok 5 AM OSC 1.25 1.25 1.25 1.25 AM local oscillation circuit 3.6K pin 1.25 ; (Typ.) - _ www.artschip.com
= 125y_ coil. 12 FM RF IN 0.3 0.3 (43) BK FM RF input pin | TK 10 AM REF IN 1.25 | 1.25 | 1.25 | 1.25 (10) AM RF input Vec Pou jwe | oo |code 14 FM/AM FE 0.36 | 02 | 036 | 02 IF output pin of FM and OUT AM, Connect IF filter 15 BAND SELECT] 0.84 0.88 ta Vec JEM and AM bands selection switch pin. During GND it becomes ee AM and during open it becomes FM. tL GND
16 AM IF IN 6) Input pin of AM IF
|| 2K i 17 FM IF IN 0.34 0.88 Input pin of FM IF 360 24 24K 5.6K —& GND poe nc | co |code www.artschip.com
19 METER 1.6 1.6 4.5 4.5 Meter drive circuit (19) (For tuning indicator) 1.25V GND _ 20 jeno | oo | co | co | | During AM, it determines time constant of AGC. During AM, it determines (i) time constant of AGC. 23 DET OUT 1.25 1.0 1.25 1.0 Detection output pin L | = - GND
24 AF IN g) 1K Power amplifier input pin
L_] til GND 25 RIPPLE 2.71 2.71 5.4 5.4 —_——— Vcc [Ripple filter FILTER rN 17K | 73K | 90K | 26 vec | 30 | 30 | oo | eo | [Power supply pin 28 jenn | co | oo | co | lo | Per GD *Note: The pin voltage of pin 6 during AM, it is the same pin voltage of pin22 (23) during J BAND and is the same pin voltage of pin 21 (22) during WV BAND. www.artschip.com
CXA1191_ LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Ta=25°C,Vec=6V) No ITEM SYVBOL TEST CONDITIONS MIN | TYP | MAX UNIT. CONDITIONS POINT 1|2/3/4|5/6| | + [aworcutouree | tor_|alelalalalal ia |Nosignaam | - | a5 | 100 | ma | 2 [rwciroutcurent | toa |alelalalelal ia |Nosimaem | - | 70 | 0 | ma | 2 [rwirontendvotaso vain | evi [alplalalsla| va vueaoseuvtoov, |e | so | as | oe pe [ATER Rese’ PL kHz,22 5kHz DEV) 5 |FMIF knee level VD2 JA A A VD Ving level at a point 3 dB 24 32 dByy down from Ving=SOdBuY 10.7 MHZ(1 kHz,22, 5kHz DEV) Fa [TI Reece |= [| = factor kHz, fSkHz DEV) | 7 [rwmetercurent | et_fal-|-Jalela| i ursodevto7mHe | 18 | 5 | 70 | ma | 8 |aviironendvotace sain | ove [alalalalalal ve Wie-souawv.recone | 15 | 2 | 29 | | AM IF voltage gain GV3 JAJA ALAA VD Ving ww hen 455kKHz 14 20 27 dB (ikHz, 30% MOD) output is —34dBm PTE PH Ree PL (kHz, 30% MOD} Si Bali == (1kHz, 30% MOD} 12 | AM detection output distortion THD2 JAJA AJA VB Vine=B0dBuV, 1660kKHz 2.0 % factor (1kKHz, 30% MOD) Vec=7,8V PATA Ree Ving=-SOdBuY 1 KH 14 | Audio distortion factor THES | A VE Distortion factor for 0.3 25 Yo output of S0mVv¥ Ving 0dBuV 10.7 MHz Ving=-20dBu m, 1K, 15 |Muting level VD4 7A VE Muting level for 50 mv 15 22 output Vinge -20dBm,1kH, Ving OFF OdBuV=1pV www.artschip.com
CXA1191 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT | Gt Ut uv { Z ° (9) Mild I O0-O-O-O-O-O-O CXA1191 = egaat2%e2= La = Ee os a es EES | TRL bell ® i sey pili ae Doze ‘S04 Say O.on www.artschip.com