Datasheet CXA1691AS, CXA1691AM Datasheet (Sony)

—1—

E98425-TE

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.

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)

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

FM/AM Radio

CXA1691AM CXA1691AS

28 pin SOP (Plastic) 30 pin SDIP (Plastic)

CXA1691AM/AS

For the availability of this product, please contact the sales office.

—2—

CXA1691AM/AS

Block Diagram

CXA1691AM

CXA1691AS

28 27 26 25 24 23 22 21

20 19 18 17 16

15

FM/AM

BAND

SELECT

AM

IF IN

FM

IF INNCMETER

IF

GND

AFC AGC

DET OUT

AF

IN

Ripple

FILTERV

CC

AF

OUTGND

MUTE FM

DISCRI

NF AM

OSC

AFC FM

OSC

Reg

OUTFMRFAMRF IN

NC FM

RF INFEGND

FM/AM

FE OUT

VOL

1 2 3 4 5 6 7 8 9

10 11 12 13 14

AM IF DET AGC

TUNING METER

FM IF

AM FE

FM

DISCRIMINATOR

FM FE

AF POWER AMP

28 27 26 25 24 23 22 21

20 19 18 17 16

15

FM/AM

BAND

SELECT

AM

IF IN

FM

IF INNCMETER

IF

GND

AFC AGC

DET OUT

AF

IN

Ripple

FILTERV

CC

AF

OUTGNDGND

MUTE FM

DISCRI

NF AM

OSC

AFC FM

OSC

Reg

OUTFMRFAMRF IN

NC FM

RF INFEGND

FM/AM

FE OUT

VOL

1 2 3 4 5 6 7 8 9

10 11 12 13 14

2930

NC

AF POWER AMP

TUNING METER

FM

DISCRIMINATOR

AM IF DET AGC

AM FE

FM FE

FM IF

—3—

CXA1691AM/AS

Standard Circuit Design Data (The pin numbers in the parenthesis are for CXA1691AS.)

Voltage (V)

No. Symbol VCC=3 V VCC=6 V Equivalent circuit Description

FM AM FM AM

1

(1, 2)

2 (3)

3 (4)

27 (28)

4 (5)

5 (6)

6 (7)

8 (9)

7 (8)

MUTE

FM DISCRI

NF

AF OUT

VOL CONT

AM OSC

AFC

REG OUT

FM OSC

0 0 0 0

2.18 2.70 4.88 5.43

1.5 1.5 3.0 3.0

1.25 1.25 1.25 1.25

1.25 ∗ 1.25 ∗

1.25 1.25 1.25 1.25

2

1k

1.2k

3

27

V

CC

GND

×100

4

GND

20k

80k

5

3.6k

6

8

1.25V (REG)

7

Phase-shift circuit Connect ceramic discriminator

Negative feedback pin

Power amplifier output pin

Connect variable resistor for electronic volume control.

AM local oscillation circuit

AFC variable capacitor pin

Regulator pin 1.25 V (Typ.)

FM local oscillation circuit

—4—

CXA1691AM/AS

Voltage (V)

No. Symbol VCC=3 V VCC=6 V Equivalent circuit Description

FM AM FM AM

9 (10)

12 (13)

10 (11)

11 (12)

13 (14)

14 (15)

15 (16)

16 (17)

17 (18)

18 (19)

FM RF

FM RF IN

AM RF IN

NC GND

(FE GND)

FM/AM FE OUT

BAND SELECT

AM IF IN

FM IF IN

NC

1.25 1.25 1.25 1.25

0.3 0 0.3 0

1.25 1.25 1.25 1.25

0 0 0 0

0.36 0.2 0.36 0.2

0.84 0 0.88 0

0 0 0 0

1.30 0 1.30 0

0 0 0 0

9

3p

8k

1k

12

10

V

CC

AM FM

220

14

15

GND

V

CC

16

2k

GND

17

360

Connect FM RF tuning coil

FM RF input pin

AM RF input pin

IF output pin of FM and AM. Connect IF filter.

FM and AM bands selection switch pin. During GND it becomes AM and during open it becomes FM.

Input pin of AM IF.

Input pin of FM IF.

—5—

CXA1691AM/AS

Voltage (V)

No. Symbol VCC=3 V VCC=6 V Equivalent circuit Description

FM AM FM AM

19 (20)

20 (21)

21 (22)

22 (23)

23 (24)

24 (25)

25 (26)

26 (27)

28

(29, 30)

METER

GND

AFC/AGC

DET OUT

AF IN

RIPPLE FILTER

VCC

GND

1.6 1.6 4.5 4.5

0 0 0 0

1.25 1.49 1.25 1.49

1.25 1.25 1.25 1.25

1.25 1.0 1.25 1.0

0 0 0 0

2.71 2.71 5.4 5.4

3.0 3.0 6.0 6.0

0 0 0 0

GND

19

×3

N

1.25V

22

21

23

33k 39k

GND

24

11k

×4 ×4

82k

GND

25

17k

73k 90k

V

CC

Meter drive circuit (For tuning indicator)

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

Power amplifier input pin

Ripple filter

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.

—6—

CXA1691AM/AS

No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Item

AM circuit current

FM circuit current

FM front end voltage gain

FM detection output level

FM IF knee level

FM detection output

distortion factor

FM meter current

AM front end voltage gain

AM IF voltage gain

AM detection output level

AM meter current

AM detection output

distortion factor

Audio voltage gain

Audio distortion factor

Muting level

Symbol

ID1

ID2

GV1

VD1

VD2

THD1

IB1

GV2

GV3

VD3

IB2

THD2

GV4

THD3

VD4

SW conditions

1 2 3 4 5 6

A B A A A A

A B A A B A

A — — A B A

A A A A A A

A A — A A A

A A B B A A

A — — — — B

Test

Point

IA

VA

VD

IM

VB

VD

IM

VD

VE

Conditions

No signal, AM

No signal, FM

V

IN1=40 dBµV, 100 MHz

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

Min. Typ. Max. Unit

— 4.8 10.0 mA

— 7.6 14.0 mA

32 39 46 dB

39 77.5 155

mVrms

— 24 32 dBµV

— 0.3 2.0 %

1.8 3.5 7.0 mA

15 22 29 dB

14 20 27 dBµV

39 77.5 155

mVrms

1.3 3.0 7.0 mA

— 0.6 2.0 %

27 31.5 36 dB

— 0.9 2.5 %

8 15 22 dB

Electrical Characteristics (See the Electrical Characteristics Test Circuit, Ta=25 °C, VCC=6 V)

0 dBµV=1 µV

—7—

CXA1691AM/AS

Electrical Characteristics Test Circuit

IFT

24p

2k

112233445566778899

VIN2

VIN1

VIN3

VA

VB

100

0.01µ

10µ

150µH

1µ

0.01µ

0.012µ

4.7µ

100µ0.047µ

0.047µ

470µ

S2

B

A

330

2k

CF1

30p

REG

150

43p

10p

1000p

30p 30p

100k

8p

24p

OSC

AFC

B

A

S1

150

CF3

33k

24k

101113

14

VE

GND

V

CC

8

15 16 17 18 19 20 21 22 23 2524 26 27 28

5k

A

B

S6

IM

VD

VIN4

S5

S4

S3

B

A

AM/FM

IF OUT

FE

GND

FM IN NC AM IN FM RF REG FM

OSC

AFC AM

OSC

VOL NF FM

DISCRI

MUTE

BAND

SELECT

AM

IF IN

FM

IF IN NC METER

IF

GND

AGC

AFC

AGC

AFC

DET

OUT

AF

IN RIPPLE V

CC AF OUT GND

CF1 :

CF3 :

IFT :

OSC :

AM 455kHz C.F.

FM DISCRIMINATOR

AM 455kHz IFT

AM OSC

CXA1691AM

0.1µ

50k

BPF

12

—8—

CXA1691AM/AS

Application Circuit 1

1345

26

789

10111213

14

15 16 17 18 19 20 21 22 23 2524 26 27 28

AM/FM

IF OUT

FE

GND

FM

RF IN

NC AM

RF

FM

RF

REG

OUT

FM

OSC

AFC AM

OSC

VOL NF DISCRI MUTE

BAND

SELECT

AM

IF IN

FM

IF IN NC METER

IF

GND

AFC

AGC

AFC

AGC

DET

OUT

AF

IN RIPPLE V

CC

AF

OUT GND

ANT

L1

C1

2p

L2

C2

18p

L3

C3

22p

L4

C4

6p

C5

10µ

C6

0.01µ

C7

1p

R1

100k

R3 150

S2

RV1

50k

RV2

10k

BATT

EPJ

C21

220µ

10V

C20

0.1µ

C18

470µ

6.3V

C17

10µ

50V

C19

0.1µ

C15

0.47µ/

50V

D1

C16

0.022µ

C14

10µ

50V

C13

4.7µ

50V

C12

10µ

50V

R6

1k

CF2

R5

330

CF1

T1

C11

100p

R4

2.2k

C10

0.01µ

S1

FM

AM

BPF

CXA1691AM

CF3

C8

4.7µ

50V

C22 0.1µ

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.

—9—

CXA1691AM/AS

Application Circuit 2

3456789

1011121314

15

16 17 18 19 20 21 22 23 2524 26 27 28

AM/FM

IF OUT

FE

GND

FM

RF IN

NC AM

RF

FM

RF

REG

OUT

FM

OSC

AFC AM

OSC

VOL NF DISCRI MUTE

BAND

SELECT

AM

IF IN

FM

IF IN NC

NC

METER

IF

GND

AFC

AGC

AFC

AGC

DET

OUT

AF

IN RIPPLE V

CC

AF

OUT GND GND

29 30

ANT

C5

10µ

C6

0.01µ

C7

1p

R1

100k

C8

4.7µ

50

CF3

R3 150

L1

C1

2p

L2

C2

18p

L3

C3

22p

L4

C4

6p

RV1

50k

R2

10k

S2

BATT

EPJ

C21

220µ

10V

C20

0.1µ

C18

470µ

6.3V

C17

10µ

50V

C19

0.1µ

C15

0.47µ/

50V

D1

C16

0.022µ

C14

4.7µ

50V

C13

10µ

50V

C12

10µ

50V

CF2

R5

330

CF1

T1

C11

100p

R4

2.2k

C10

0.01µ

S1

FM

AM

BPF

CXA1691AS

R6

1k

C22

0.1µ

1

2

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.

—10—

CXA1691AM/AS

Coil data

AM OSC

Core diameter ø 0.06 mm 2UEW

Equivalent to L-5K7-H5 R12-1684X. Mitsumi Electric Co., Ltd. or 7TRS-8441X TOKO Co., Ltd.

FM RF

FM OSC

AM bar antenna

BPF PFWE8

(88 to 108 MHz) Soshin Electric Co., Ltd.

CF1 SFU-455B Murata Mfg. Co., Ltd. Or BFCFL-455 TOKO Co., Ltd. CF2 SFE10.7MA5 Murata Mfg. Co., Ltd. CF3 CDA10.7MC1 Murata Mfg. Co., Ltd.

f (kHz)

796

L (µH)

1 to 3

270

QO

1 to 3

125

1 to 3

107

4 to 6

29

f (kHz)

796

L (µH)

650

Primary

91 t

Secondary

20 t

S

1

2

3

4 5 6

AM IFT

Core diameter ø 0.07 mm UEW

Equivalent to 21K7-H5 R12-8558A. Mitsumi Electric Co., Ltd. or 7MC-7789N TOKO Co., Ltd.

S

1

2

3

4 5 6

φ 4mm φ 0.6mm 4.5t

φ 4mm φ 0.6mm 3.5t

Primary

Secondary

Number of widings (t)

CO (pF)

1 to 3

180

QO

1 to 3

90

1 to 2

111

2 to 3

35

4 to 6

7

Number of widings (t)

SONY CODE EIAJ CODE JEDEC CODE

SOP-28P-L04

PACKAGE STRUCTURE

PACKAGE MATERIAL LEAD TREATMENT LEAD MATERIAL PACKAGE MASS

42/COPPER ALLOY

SOLDER PLATING

EPOXY RESIN

28PIN SOP (PLASTIC)

18.8 – 0.1

+ 0.4

1528

0.45 ± 0.1

1.27

9.3

2.3 – 0.15

+ 0.4

0.1 – 0.05

+ 0.2

0.5 ± 0.2

0.2 – 0.05

+ 0.1

7.6 – 0.1

+ 0.3

10.3 ± 0.4

14

M

0.24

SOP028-P-0375

1

0.7g

0.15

SONY CODE EIAJ CODE JEDEC CODE

30PIN SDIP (PLASTIC)

26.9 – 0.1

+ 0.4

15

16

30

1.778

10.16

8.5 – 0.1

+ 0.3

0.25 – 0.05

+ 0.1

0° to 15°

0.5 ± 0.1

0.9 ± 0.15

3.0 MIN

0.5 MIN

3.7 – 0.1

+ 0.4

SDIP-30P-01 SDIP030-P-0400

1

PACKAGE STRUCTURE

MOLDING COMPOUND LEAD TREATMENT LEAD MATERIAL PACKAGE MASS

EPOXY RESIN

PLATING

COPPER ALLOY

1.8g

SOLDER/PALLADIUM

1.All mat surface type.

Two kinds of package surface:

2.All mirror surface type.

Package Outline Unit : mm

CXA1691AM

CXA1691AS

CXA1691AM/AS

—11—

NOTE : PALLADIUM PLATING

This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).