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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 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
Ripple AF VCC FILTER IN 27 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 x100 27 x100
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 x3
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
x4
x4 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 dBV, 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
dBV
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 dBV 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 dBV, 10.7 MHz (1 kHz, 22.5 kHz DEV) VIN3=level at a point 3 dB down from VIN3=90 dBV, 10.7 MHz (1 kHz, 22.5 kHz DEV) VIN3=90 dBV, 10.7 MHz (1 kHz, 75 kHz DEV) VIN3=60 dBV, 10.7 MHz VIN2=60 dBV, 1660 kHz VIN3 when 455 kHz (1 kHz, 30 % MOD) output is -34 dBm VIN3=85 dBV, 455 kHz (1 kHz, 30 % MOD) VIN3=85 dBV, 455 kHz (1 kHz, 30 % MOD) VIN2=95 dBV, 1660 kHz (1 kHz, 30 % MOD) VIN3=60 dBV, 10.7 MHz VIN4=-30 dBm, 1 kHz Distortion factor for 50 mW output VIN3=60 dBV, 10.7 MHz VIN4=-20 dBm, 1 kHz Muting level for 50 mW output VIN4=-20dBm, 1 kHz Attenuation for 60 dBV input with VIN3 OFF 8 15
22
dB
0 dBV=1 V
Electrical Characteristics Test Circuit
REG AFC 24k 24k 0.1 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 1 150 B A
0.01 10 50k
150
150H 43p 10p
VIN2
OSC 100k
VIN1
0.01
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 1 1 4.7 0.012 VD BAND AM SELECT IF IN 15 16 0.01 S5 B A B A IM B A 0.01 S4 0.01 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 1 5k 470 0.047 0.047100 VIN4 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 0.1 C2 18p C3 22p L4 L3 L2 C4 6p
RV1 50k
BPF C5 10 C7 1p R1 100k 11 NC AM RF FM RF REG OUT FM OSC AFC AM OSC VOL 10 C8 4.7 50V
14 AM/FM FE FM IF OUT GND RF IN
C6 0.01 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 10 50V D1 C16 0.022 C17 10 50V C13 4.7 50V R6 1k C14 10 50V
S2
AF OUT 27
GND 28
EPJ
S1
C11 100p
T1
AF IN RIPPLE VCC 24 25 26 C15 C19 0.47/ 0.1 50V
FM
BATT
R4 2.2k
AM
C10 0.01
C18 470 6.3V
C20 0.1
C21 220 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 0.1 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 10 C7 1p R1 100k C8 4.7 50
15 AM/FM FE FM IF OUT GND RF IN
C6 0.01 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 0.47/ 0.1 50V D1 C16 0.022 CF1 R5 330 CF2 C12 10 50V C13 10 50V R6 1k C14 4.7 50V C17 10 50V
AF IN RIPPLE VCC
AF OUT 28
GND 29
GND 30
EPJ
S1
C11 100p
T1
FM
BATT
R4 2.2k
AM
C10 0.01
C18 470 6.3V
C21 C20 220 0.1 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 o 0.06 mm 2UEW
4 5 6
f (kHz) 796
L (H) 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 o 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
4mm 0.6mm 4.5t
FM OSC
4mm 0.6mm 3.5t
AM bar antenna f (kHz) 796 L (H) 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

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