CXA1691AM

CXA1691AM/AS FM/AM Radio For the availability of this product, please contact the sales office. Description CXA1691AM/AS is a one-chip FM/AM radio IC designed for radio-cassette tape recorders. Features • Small number of peripheral components. • Low current consumption (VCC=3 V) For FM : ID=5.8 mA (Typ.) For AM : ID=4.7 mA (Typ.) • Built-in FM/AM select switch. • Large output of AF amplifier. VCC=6 V, EIAJ output=450 mW (Typ.) when load impedance 8 Ω Function 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 monolithic IC CXA1691AM 28 pin SOP (Plastic) CXA1691AS 30 pin SDIP (Plastic) Absolute Maximum Ratings (Ta=25 °C) • Supply voltage VCC 14 V • Operating temperature Topr –10 to +60 °C • Storage temperature Tstg –50 to +125 °C • Allowable power dissipation PD 700 mW (CXA1691AM) PD 1000 mW (CXA1691AS) Recommended Operating Conditions Supply voltage VCC 2 to 7.5 V (CXA1691AM) VCC 2 to 8.5 V (CXA1691AS) Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. —1— E98425-TE CXA1691AM/AS Block Diagram CXA1691AM AF GND OUT 28 27 Ripple AF VCC FILTER IN 26 25 24 DET AFC AFC OUT AGC AGC 23 22 21 IF GND METER NC 20 19 18 FM/AM FM AM BAND IF IN IF IN SELECT 17 16 15 AM IF DET AGC TUNING METER AF POWER AMP AM FE FM DISCRIMINATOR FM FE FM IF 1 MUTE 2 3 4 VOL 5 AM OSC 6 AFC 7 8 9 FM RF FM NF DISCRI FM Reg OSC OUT 10 AM RF IN 11 NC 12 13 14 FM FE FM/AM RF IN GND FE OUT CXA1691AS AF GND GND OUT 30 29 28 VCC 27 Ripple AF FILTER IN 26 25 DET AFC AFC OUT AGC AGC 24 23 22 IF GND METER NC 21 20 19 FM/AM FM AM BAND IF IN IF IN SELECT 18 17 16 AM IF DET AGC TUNING METER AF POWER AMP AM FE FM DISCRIMINATOR FM FE FM IF 1 MUTE 2 NC 3 4 5 VOL 6 AM OSC 7 AFC 8 9 FM NF DISCRI FM Reg OSC OUT 10 FM RF 11 AM RF IN 12 NC 15 13 14 FM FE FM/AM RF IN GND FE OUT —2— CXA1691AM/AS Standard Circuit Design Data No. 1 (1, 2) Symbol Voltage (V) VCC=3 V VCC=6 V FM AM FM AM 0 0 0 0 (The pin numbers in the parenthesis are for CXA1691AS.) Equivalent circuit Description MUTE 2 2 (3) FM DISCRI 2.18 2.70 4.88 5.43 1.2k 1k Phase-shift circuit Connect ceramic discriminator 3 (4) NF 1.5 1.5 3.0 3.0 VCC ×100 27 ×100 Negative feedback pin 27 (28) AF OUT 1.5 1.5 3.0 3.0 3 GND Power amplifier output pin 4 20k 4 (5) VOL CONT 1.25 1.25 1.25 1.25 80k GND Connect variable resistor for electronic volume control. 5 5 (6) AM OSC 1.25 1.25 1.25 1.25 3.6k AM local oscillation circuit 6 (7) 8 (9) AFC REG OUT 1.25 ∗ 1.25 ∗ 6 8 1.25V (REG) AFC variable capacitor pin Regulator pin 1.25 V (Typ.) 1.25 1.25 1.25 1.25 7 7 (8) FM OSC 1.25 1.25 1.25 1.25 FM local oscillation circuit —3— CXA1691AM/AS No. Symbol Voltage (V) VCC=3 V VCC=6 V FM AM FM AM 1.25 1.25 1.25 1.25 Equivalent circuit Description 3p 9 (10) FM RF 9 8k Connect FM RF tuning coil 12 (13) FM RF IN 0.3 0 0.3 0 12 1k FM RF input pin 10 10 (11) AM RF IN 1.25 1.25 1.25 1.25 VCC AM RF input pin 11 (12) NC 13 (14) GND (FE GND) 0 0 0 0 0 0 0 0 AM FM FM/AM 14 (15) FE OUT 0.36 0.2 0.36 0.2 220 14 IF output pin of FM and AM. Connect IF filter. VCC 15 (16) BAND SELECT 0.84 0 0.88 0 15 GND FM and AM bands selection switch pin. During GND it becomes AM and during open it becomes FM. 16 (17) AM IF IN 0 0 0 0 16 2k Input pin of AM IF. 17 (18) FM IF IN 1.30 0 1.30 0 17 360 Input pin of FM IF. GND 18 (19) NC 0 0 0 0 —4— CXA1691AM/AS No. Symbol Voltage (V) VCC=3 V VCC=6 V FM AM FM AM Equivalent circuit Description 19 1.25V ×3 19 (20) METER 1.6 1.6 4.5 4.5 N GND Meter drive circuit (For tuning indicator) 20 (21) GND 0 0 0 0 AFC pin of W band. During AM, it determines time constant of AGC AFC pin of J band. During AM, it determines time constant of AGC. Detection output pin 21 (22) AFC/AGC 1.25 1.49 1.25 1.49 22 22 (23) AFC/AGC 1.25 1.25 1.25 1.25 23 33k 39k 21 GND 23 (24) DET OUT 1.25 1.0 1.25 1.0 11k 24 24 (25) AF IN 0 0 0 0 ×4 ×4 82k GND Power amplifier input pin VCC 25 (26) RIPPLE FILTER 17k 2.71 2.71 5.4 5.4 25 73k 90k Ripple filter 26 (27) VCC 28 GND (29, 30) 3.0 3.0 6.0 6.0 0 0 0 0 Power supply pin Power GND ∗ The pin voltage of pin 6 during AM, it is the same pin voltage of pin 22 (23) during J BAND and is the same pin voltage of pin 21 (22) during W BAND. —5— Electrical Characteristics Symbol Min. — — 32 39 77.5 4.8 7.6 39 10.0 14.0 46 mA mA dB 155 mVrms Typ. Max. Unit ID1 ID2 GV1 VD1 A——A B A VD 1 A A A No signal, AM No signal, FM VIN1=40 dBµV, 100 MHz 6 A A A SW conditions 2345 BAAA BAAB BAAB Conditions Test Point IA IA VA (See the Electrical Characteristics Test Circuit, Ta=25 °C, VCC=6 V) No. Item 1 2 3 AM circuit current FM circuit current FM front end voltage gain 4 FM detection output level 5 FM IF knee level VD2 A——A B A VD — 24 32 dBµV 6 IB1 GV2 GV3 VD3 IB2 THD2 GV4 A————B VE A A B B A A VD A A—A A A IM A A—A A A VD A A—A A A VD A——A AAAA B A A A IM VB THD1 A——A B A VD — 1.8 15 14 39 1.3 — 27 0.3 3.5 22 20 77.5 3.0 0.6 31.5 2.0 7.0 29 27 % mA dB dBµV 155 mVrms 7.0 2.0 36 mA % dB 7 8 FM detection output distortion factor FM meter current AM front end voltage gain —6— THD3 A————B VE VD4 A————B VE 9 AM IF voltage gain 10 AM detection output level 11 AM meter current 12 AM detection output distortion factor 13 Audio voltage gain 14 Audio distortion factor — 0.9 2.5 % CXA1691AM/AS 15 Muting level VIN3=90 dBµV, 10.7 MHz (1 kHz, 22.5 kHz DEV) VIN3=level at a point 3 dB down from VIN3=90 dBµV, 10.7 MHz (1 kHz, 22.5 kHz DEV) VIN3=90 dBµV, 10.7 MHz (1 kHz, 75 kHz DEV) VIN3=60 dBµV, 10.7 MHz VIN2=60 dBµV, 1660 kHz VIN3 when 455 kHz (1 kHz, 30 % MOD) output is –34 dBm VIN3=85 dBµV, 455 kHz (1 kHz, 30 % MOD) VIN3=85 dBµV, 455 kHz (1 kHz, 30 % MOD) VIN2=95 dBµV, 1660 kHz (1 kHz, 30 % MOD) VIN3=60 dBµV, 10.7 MHz VIN4=–30 dBm, 1 kHz Distortion factor for 50 mW output VIN3=60 dBµV, 10.7 MHz VIN4=–20 dBm, 1 kHz Muting level for 50 mW output VIN4=–20dBm, 1 kHz Attenuation for 60 dBµV input with VIN3 OFF 8 15 22 dB 0 dBµV=1 µV Electrical Characteristics Test Circuit REG AFC 24k 24k 0.1µ 33k CF3 33k 14 13 12 AM/FM FE FM IN IF OUT GND FM OSC AFC AM OSC VOL 11 10 9 8 NC AM IN FM RF REG 100 24p BPF 30p 1000p 8p 2k S1 30p 150 B 1µ A 0.01µ 10µ 150 50k 10p 150µH 43p VIN2 OSC 100k VIN1 0.01µ VA S2 330 B A 24p 7 6 5 4 3 NF 2 1 FM MUTE DISCRI 2k IFT CXA1691AM CF1 —7— FM IF IN 17 1µ 1µ 4.7µ 0.012µ VD BAND AM SELECT IF IN 15 16 0.01µ S5 B A B A IM B A 0.01µ S4 0.01µ IF AGC NC METER GND AFC 18 19 20 21 AGC AFC 22 DET OUT 23 B A S3 VB 30p AF IN RIPPLE VCC AF OUT GND 24 25 26 27 28 S6 1µ 5k 0.047µ100µ VIN4 470µ 0.047µ 8 VE GND VCC CF1 : AM 455kHz C.F. CF3 : FM DISCRIMINATOR IFT : AM 455kHz IFT OSC : AM OSC VIN3 CXA1691AM/AS Application Circuit 1 ANT L1 C1 2p RV2 10k R3 150 CF3 C22 0.1µ C2 18p C3 22p L4 L3 L2 C4 6p RV1 50k BPF C5 10µ C7 1p R1 100k 11 NC AM RF FM RF REG OUT FM OSC AFC AM OSC VOL 10 C8 4.7µ 50V 14 AM/FM FE FM IF OUT GND RF IN C6 0.01µ 13 12 9 6 2 8 7 5 4 3 1 NF DISCRI MUTE —8— CXA1691AM BAND AM SELECT IF IN 15 16 FM IF IN 17 IF AFC NC METER GND AGC 18 19 20 21 AFC AGC 22 DET OUT 23 CF1 R5 330 CF2 C12 10µ 50V D1 C16 0.022µ C17 10µ 50V C13 4.7µ 50V R6 1k C14 10µ 50V S2 AF OUT 27 GND 28 EPJ S1 C11 100p T1 AF IN RIPPLE VCC 24 25 26 C15 C19 0.47µ/ 0.1µ 50V FM BATT R4 2.2k AM C10 0.01µ C18 470µ 6.3V C20 0.1µ C21 220µ 10V CXA1691AM/AS Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. Application Circuit 2 ANT L1 C1 2p C3 22p L4 R2 10k R3 150 CF3 C22 0.1µ 12 NC AM RF CXA1691AS FM RF REG OUT FM OSC AFC AM OSC VOL NF DISCRI 11 10 C2 18p L3 L2 C4 6p RV1 50k BPF C5 10µ C7 1p R1 100k C8 4.7µ 50 15 AM/FM FE FM IF OUT GND RF IN C6 0.01µ 14 13 9 8 7 6 5 4 3 2 NC 1 MUTE S2 —9— BAND AM FM SELECT IF IN IF IN 16 17 18 19 20 21 22 23 24 IF AFC AFC NC METER GND AGC AGC DET OUT 25 26 27 C15 C19 0.47µ/ 0.1µ 50V D1 C16 0.022µ CF1 R5 330 CF2 C12 10µ 50V C13 10µ 50V R6 1k C14 4.7µ 50V C17 10µ 50V AF IN RIPPLE VCC AF OUT 28 GND 29 GND 30 EPJ S1 C11 100p T1 FM BATT R4 2.2k AM C10 0.01µ C18 470µ 6.3V C21 C20 220µ 0.1µ 10V CXA1691AM/AS Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. CXA1691AM/AS Coil data AM OSC S 3 2 1 Core diameter ø 0.06 mm 2UEW 4 5 6 f (kHz) 796 L (µH) 1 to 3 270 QO 1 to 3 125 Number of widings (t) 1 to 3 4 to 6 107 29 Equivalent to L-5K7-H5 R12-1684X. Mitsumi Electric Co., Ltd. or 7TRS-8441X TOKO Co., Ltd. AM IFT 3 2 1 S Core diameter ø 0.07 mm UEW 4 5 6 CO (pF) 1 to 3 180 QO 1 to 3 90 Number of widings (t) 1 to 2 2 to 3 4 to 6 111 35 7 Equivalent to 21K7-H5 R12-8558A. Mitsumi Electric Co., Ltd. or 7MC-7789N TOKO Co., Ltd. FM RF φ 4mm φ 0.6mm 4.5t FM OSC φ 4mm φ 0.6mm 3.5t AM bar antenna f (kHz) 796 L (µH) 650 Primary 91 t Secondary 20 t Primary Secondary BPF PFWE8 (88 to 108 MHz) SFU-455B SFE10.7MA5 CDA10.7MC1 Soshin Electric Co., Ltd. Murata Mfg. Co., Ltd. Or BFCFL-455 TOKO Co., Ltd. Murata Mfg. Co., Ltd. Murata Mfg. Co., Ltd. —10— CF1 CF2 CF3 CXA1691AM/AS Package Outline CXA1691AM Unit : mm 28PIN SOP (PLASTIC) + 0.4 18.8 – 0.1 28 15 + 0.4 2.3 – 0.15 0.15 + 0.2 0.1 – 0.05 + 0.3 7.6 – 0.1 10.3 ± 0.4 9.3 1 0.45 ± 0.1 14 1.27 + 0.1 0.2 – 0.05 0.24 M PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SOP-28P-L04 SOP028-P-0375 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER PLATING 42/COPPER ALLOY 0.7g CXA1691AS 30PIN SDIP (PLASTIC) + 0.4 26.9 – 0.1 30 16 + 0.3 8.5 – 0.1 + 0.1 05 0.25 – 0. 0.5 ± 0.2 0° to 15° EPOXY RESIN SOLDER/PALLADIUM PLATING COPPER ALLOY 1.8g 1 1.778 15 0.5 MIN + 0.4 3.7 – 0.1 10.16 Two kinds of package surface: 1.All mat surface type. 2.All mirror surface type. 0.5 ± 0.1 0.9 ± 0.15 PACKAGE STRUCTURE MOLDING COMPOUND SONY CODE EIAJ CODE JEDEC CODE SDIP-30P-01 SDIP030-P-0400 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). —11— 3.0 MIN