AM/FM radio receiver circuit

25
D A T A SH EET Product specification File under Integrated Circuits, IC01 March 1994 INTEGRATED CIRCUITS TEA5710; TEA5710T AM/FM radio receiver circuit

Transcript of AM/FM radio receiver circuit

Page 1: AM/FM radio receiver circuit

DATA SHEET

Product specificationFile under Integrated Circuits, IC01

March 1994

INTEGRATED CIRCUITS

TEA5710; TEA5710TAM/FM radio receiver circuit

Page 2: AM/FM radio receiver circuit

March 1994 2

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

FEATURES

• Wide supply voltage range: 2.0 to 12 V

• Low current consumption: 7.5 mA at AM, 9.0 mA at FM

• High selectivity with distributed IF gain

• LED driver for tuning indication

• High input sensitivity: 1.6 mV/m (AM), 2.0 µV (FM) for 26dB S/N

• Good strong signal behaviour: 10 V/m at AM, 500 mV atFM

• Low output distortion: 0.8% at AM, 0.3% at FM

• Designed for simple and reliable PC-board layout

• High impedance MOSFET input on AM

APPLICATIONS

• Portable AM/FM radio

• Clock radio

• Personal headphone radio

DESCRIPTION

The TEA5710 is a high performance Bimos IC for use inAM/FM radios. All necessary functions are integrated:from AM and FM front-end to detector output stages.

QUICK REFERENCE DATAConditions AM: fi = 1 MHz; m = 0.3; fm = 1 kHz; VP = 3.0 V; measured in Fig.4 with S1 in position B and S2 in position A,unless otherwise specified. Conditions FM: fi = 100 MHz; ∆f = 22.5 kHz; fm = 1 kHz; VP = 3.0 V; measured in Fig.4 withS1 in position B and S2 in position A, unless otherwise specified.

ORDERING INFORMATION

Notes

1. SOT234-1; 1996 August 27.

2. SOT137-1; 1996 August 27.

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

VP positive supply voltage 2.0 − 12 V

IP supply current

in AM mode 5.6 7.5 9.9 mA

in FM mode 7.3 9.0 11.2 mA

Tamb operating ambient temperature range −15 − +60 °C

AM performance

Vin1 RF sensitivity 40 55 70 µV

V13 AF output voltage 36 45 70 mV

THD total harmonic distortion − 0.8 2.0 %

FM performance

Vin3 RF sensitivity 1.0 2.0 3.8 µV

V13 AF output voltage 47 58 69 mV

THD total harmonic distortion − 0.3 0.8 %

EXTENDED TYPENUMBER

PACKAGE

PINS PIN POSITION MATERIAL CODE

TEA5710 24 SDIL plastic SOT234AG(1)

TEA5710T 24 SO24L plastic SOT137A(2)

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Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

Fig.1 Block diagram.

handbook, full pagewidth

MGE106

FM-RFI FM-RFO FM-MIXER

FM FRONT-END

FM MIXER

AM FRONT-END

FM-IF1I FM-RF1O

FM IF 1

FM-IF2I

FM IF 2

FM-DEM

FM DETECTOR

AM MIXER

FM OSCILLATOR

AM OSCILLATOR

AM/FM INDICATOR

AM/FM SWITCH

AM DETECTOR

STABILIZER

24

1 20 4 6 8 10 12

18

16

22

5

9

11

17

23

3 2 7 19

13

15

21

14

AM-IF

AGC

FM

AM

RFGND

AM/FM

IND

AF

AM-AGC/ FM-AFC

FM-OSC

VP

RIPPLE

VSTABA

VSTABB

IFGND

AM-OSC

AM-RFI

AM-IF1I AM-IF2I/OAM-MIXER SUBGND

TEA5710 TEA5710T

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Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

PINNING

SYMBOL PIN DESCRIPTION

FM-RFI 1 FM-RF aerial input (input impedance typ. 50 Ω)

AM-IF1I 2 input from IFT or ceramic filter (input impedance typ. 3 kΩ)

AM-MIXER 3 open-collector output to IFT

FM-MIXER 4 output to ceramic IF filter (output impedance typ. 330 Ω)

VSTABA 5 stabilized internal supply voltage (A)

FM-IF1I 6 first FM-IF input (input impedance typ. 330 Ω)

AM-IF2I/O 7 input/output to IFT; output: current source

FM-IF1O 8 first FM-IF output (output impedance typ. 330 Ω)

VSTABB 9 stabilized internal supply voltage (B)

FM-IF2I 10 second FM-IF input (input impedance typ. 330 Ω)

IFGND 11 ground of IF and detector stages

FM-DEM 12 ceramic discriminator pin

AF 13 audio output (output impedance typ. 5 kΩ)

AM/FM 14 switch terminal: open for AM; ground for FM

IND 15 field-strength dependent indicator

VP 16 positive supply voltage

AM-OSC 17 parallel tuned AM-OSC circuit to ground

FM-OSC 18 parallel tuned FM-OSC circuit to ground

SUBGND 19 substrate and RF ground

FM-RFO 20 parallel tuned FM-RF circuit to ground

AM-AGC/FM-AFC 21 AGC/AFC capacitor pin

RIPPLE 22 ripple capacitor pin

AM-RFI 23 parallel tuned AM aerial circuit to ground (total input capacitance typ. 3 pF)

RFGND 24 FM-RF ground

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Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

Fig.2 Pin configuration TEA5710.

handbook, halfpage

TDA5710

MGE104

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

FM-RFI

AM-IFI

AM-MIXER

FM-MIXER

VSTABA

FM-IF1I

AM-IF2I/O

FM-IF1O

VSTABB

FM-IF2I

IFGND

FM-DEM

RFGND

AM-RFI

RIPPLE

AM-AGC/FM-AFC

SUBGND

FM-OSC

FM-RFO

AM-OSC

VP

IND

AM/FM

AF

Fig.3 Pin configuration TEA5710T.

handbook, halfpage

TDA5710T

MGE105

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

FM-RFI

AM-IFI

AM-MIXER

FM-MIXER

VSTABA

FM-IF1I

AM-IF2I/O

FM-IF1O

VSTABB

FM-IF2I

IFGND

FM-DEM

RFGND

AM-RFI

RIPPLE

AM-AGC/FM-AFC

SUBGND

FM-OSC

FM-RFO

AM-OSC

VP

IND

AM/FM

AF

FUNCTIONAL DESCRIPTION

The TEA5710 incorporates internal stabilized power supplies. The maximum supply voltage is 12 V, the minimum voltagecan go down temporarily to 1.8 V without any loss in performance.

The AM circuit incorporates a double balanced mixer, a one pin low-voltage oscillator (up to 30 MHz), a field-strengthdependent indicator output and is designed for distributed selectivity.

The AM input is designed to be connected to the top of a tuned circuit. AGC controls the IF amplification and for largesignals it lowers the input impedance.

The first AM selectivity can be an IFT as well as an IFT combined with a ceramic filter; the second one is an IFT.

The FM circuit incorporates a tuned RF stage, a double balanced mixer, a one-pin oscillator, a field-strength indicatoroutput and is designed for distributed IF ceramic filters. The FM quadrature detector uses a ceramic resonator.

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Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

LIMITING VALUESIn accordance with the Absolute Maximum Rating System (IEC 134)

THERMAL RESISTANCE

CIRCUIT DESIGN DATA

SYMBOL PARAMETER MIN. MAX. UNIT

VP positive supply voltage 0 12 V

Tstg storage temperature range −55 +150 °CTamb operating ambient temperature range −15 +60 °CTj junction temperature range −15 +150 °C

SYMBOL PARAMETER VALUE UNIT

Rth j-a from junction to ambient

for SDIL version TEA5710 69 K/W

for SO24L version TEA5710T 76 K/W

PIN NO. PIN SYMBOLDC PIN VOLTAGE (V)

EQUIVALENT CIRCUITAM FM

1 FM-RFI − 0.73

2AM-IF1I

input1.4 1.4

MGE114

220 Ω

20

24

1

MGE115

3 kΩ

2

5

11

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Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

3AM-MIXER

output1.4 1.4

4FM-MIXER

output− 1.0

5 VSTABA 1.4 1.4

6FM-IFIinput

− 0.73

PIN NO. PIN SYMBOLDC PIN VOLTAGE (V)

EQUIVALENT CIRCUITAM FM

MGE116

5

3

MGE117

680 Ω

4

MGE118

16

22

5

MGE119

2.7 kΩ

120 Ω6

5

11

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Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

7AM-IF2I/O

input/output1.4 1.4

8FM-IF1Ooutput

− 0.69

9 VSTABB 1.4 1.4

10FM-IF2I

input− 0.73

11 IFGND 0 0

PIN NO. PIN SYMBOLDC PIN VOLTAGE (V)

EQUIVALENT CIRCUITAM FM

MGE120

7

9

11

MGE121

560 Ω

9

8

MGE122

16

22

9

MGE123

2.2 kΩ

180 Ω10

9

11

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Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

12 FM-DEM − 1.0

13AF

output0.6 0.7

14AM/FMswitch

1.3 0

15 IND 3.0 3.0

16 VP 3.0 3.0

17 AM-OSC 0 0

PIN NO. PIN SYMBOLDC PIN VOLTAGE (V)

EQUIVALENT CIRCUITAM FM

MGE124

12

11

180 Ω

910 Ω

MGE125

25 kΩ

5 kΩ

13

11

MGE126

14

MGE127

15

11

MGE128

17

19

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Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

18 FM-OSC 0 0

19 SUBGND 0 0

20 FM-RFO 0 0

21AM-AGC/FM-AFC

0.1 0.7

PIN NO. PIN SYMBOLDC PIN VOLTAGE (V)

EQUIVALENT CIRCUITAM FM

MGE129

10 kΩ

18

21

19

MGE114

220 Ω

20

24

1

MGE130

21

11

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Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

22 RIPPLE 2.1 2.1

23 AM-RFI 0 0

24 RFGND 0 0

PIN NO. PIN SYMBOLDC PIN VOLTAGE (V)

EQUIVALENT CIRCUITAM FM

MGE131

22

16

11

MGE132

19

23

MGE114

220 Ω

20

24

1

Page 12: AM/FM radio receiver circuit

March 1994 12

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

AM CHARACTERISTICSfi = 1 MHz; m = 0.3; fm = 1 kHz; VP = 3.0 V; measured in Fig.4 with S1 in position B and S2 in position A, unlessotherwise specified.

FM CHARACTERISTICSfi = 100 MHz; ∆f = 22.5 kHz; fm = 1 kHz; VP = 3.0 V; measured in Fig.4 with S1 in position B and S2 in position A, unlessotherwise specified.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

IP supply current no input signal 5.6 7.5 9.9 mA

Ci input capacitance V21 = 0.2 V − 3 − pF

Gc front-end conversion gain V21 = 0.2 V 1.8 3.3 5.0

Vin1 RF sensitivity S/N = 26 dB 40 55 70 µV

Vin2 IF sensitivity V13 = 30 mV; 0.13 0.2 0.45 mV

S1 in position A

V13 AF output voltage Vin2 = 3.16 mV; 36 45 70 mV

S1 in position A

THD total harmonic distortion Vin1 = 1 mV − 0.8 2.0 %

Vin1 large signal handling m = 0.8; 150 300 − mV

THD ≤ 8%

IIND indicator current Vin2 = 100 mV; 2 3.5 6 mA

S1 in position A

IINDOFF indicator OFF current Vin2 = 0 V; − 0 10 µA

S1 in position A

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

IP supply current no input signal 7.3 9.0 11.2 mA

Vin3 RF limiting sensitivity V13 = −3 dB 0.4 1.2 3.8 µV

Vin3 RF sensitivity S/N = 26 dB 1.0 2.0 3.8 µV

V6/Vin3 front-end voltage gain Vin3 ≤ 1 mV;including ceramicfilter K1

12 18 22 dB

Vin4 IF sensitivity S2 in position B;V13 = −3 dB

− 20 30 µV

V13 AF output voltage Vin3 = 1 mV 47 58 69 mV

THD total harmonic distortion Vin3 = 1 mV;∆f = 22.5 kHz

− 0.3 0.8 %

Vin3 large signal handling THD ≤ 5% − 500 − mV

IIND indicator current Vin4 = 100 mV;S2 in position B

2 3.5 6 mA

IINDOFF indicator OFF current Vin4 = 0 V;S2 in position B

− 0 10 µA

Page 13: AM/FM radio receiver circuit

March 1994 13

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

handbook, full pagewidth

MG

E10

8

18

pF

L222

pF

FM

-OS

CF

M-R

F

L38.

2 pF

AM

-OS

C

L4

FM

AM

AF

VP

100

µF

L8

40 µ

H

10

µF

10

nF10

nF

CQ

S54

2423

2221

2019

1817

1615

1413

12

L5

to p

in 5

L6K

1K

2

10.7

M

Hz

34

56

78

910

1112

TE

A57

10

TE

A57

10T

Vp

K3

AB

AB

S2

S1

100

MH

z

468

kHz

220n

F3

1 nF

50 Ω

50 Ω33

0 Ω

560

Ω91

Ω

27 Ω

(50

Ω)

(50

Ω)

Rg

(50

Ω)

Rg

Rg

Vin

2V

in4

Vin

3

1 M

Hz

6.8

Ω68

0 pF

43 Ω

(50

Ω)

Rg

Vin

1

Fig

.4 T

est c

ircui

t.

Page 14: AM/FM radio receiver circuit

March 1994 14

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

APPLICATION INFORMATION

handbook, full pagewidth

MG

E10

7

P1

4.7

HP

32

Ω

R1

10 Ω

R2

10 Ω

C6

18

pF

2 1L2

Cc

20

pFC

Tc

8 pF

CT

d 8

pF

C7

22

pF

2 1 FM

-OS

CF

M-R

FI

Ca

140

pF

Cb

20

pFC

Ta

8 pF

CT

b 8

pF

1 2L1

AM

-RF

I

L3

Cd

80

pF

C8

8.2

pF

1 3

AM

-OS

C

L4

FM

AM

ON

O

FF

3VV

P

C2

100

µF

C10

10

0 µF

C11

10

0 µF

C3

10 µ

F

C4

10 n

FC

5 10

nF

C9

100

nF

LED

C

QS

54

2423

2221

2019

1817

1615

1413

AF

12

61

1 32

4

L5

L6K

1K

2K

3

SF

E10

.7M

S3

SF

E10

.7M

S2

CD

A10

.7M

C40

32

34

87

65

12

34

56

78

910

1112

TE

A57

10

TE

A57

10T

TD

A70

50T

VP

CO

22

pFL7

60

nH

C1

4.7

nF

Fig

.5

App

licat

ion

circ

uit o

f TE

A57

10 (

AM

: 522

to 1

611

kHz,

FM

: 87.

5 to

108

MH

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ith s

tere

o he

adph

one

ampl

ifier

TD

A70

50T

.

Page 15: AM/FM radio receiver circuit

March 1994 15

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

Fig.6 Printed-circuit board layout (track side) for application circuit of Fig.5.

handbook, full pagewidth

MGE109

Page 16: AM/FM radio receiver circuit

March 1994 16

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

Fig.7 Printed-circuit board layout (component side) for application circuit of Fig.5.

handbook, full pagewidth ANT GND 100MHz

C12

C1 680

C2

R2

R3

L5

4.75602791

1

C4

C3

K1

C11

C7

6.843

L2

ANT

F M

A M

OSC

HP PLUG

TE

A57

10

L6

K2K3

C8C5

C6

<FM AM> LED

L3P1

1.5 V

1.5 V

C10

GN

DA

F

L4

C9

1MHzL1

40 µH

MGE110

Page 17: AM/FM radio receiver circuit

March 1994 17

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

Components for Figs 4 and 5

Coils

L1 AM-AERIAL ferroceptor

length = 6 cm

L1-2 = 625 µH

N1-2 = 105 turns

L2 FM-RF L1-2 = 66 nH

N1-2 = 2.5 turns

unloaded Q = 150

TOKO type S18

TOKO no. 301SS-0200

L3 FM-OSC L1-2 = 40 nH

N1-2 = 1.5 turns

unloaded Q = 150

TOKO type S18

TOKO no. 301SS-0100

L4 AM-OSC L1-3 = 270 µH

N1-2 = 18

N2-3 = 70

unloaded Q = 100

wire diameter 0.07 mm

TOKO type 7P

material TOKO 7BRS

L5 AM-IF1 L1-3 = 625 µH

N1-2 = 17 turns

N2-3 = 141 turns

N4-6 = 10 turns

C1-3 = 180 pF

unloaded Q = 90

wire diameter 0.07 mm

TOKO type 7P

material TOKO 7MCS

L6 AM-IF2 L1-3 = 625 µH

N1-2 = 28 turns

N2-3 = 130 turns

C1-3 = 180 pF

unloaded Q = 90

wire diameter 0.07 mm

TOKO type 7P

material TOKO 7MCS

MGE133

L4

3

2

1S

MGE134

3

2

1

4

6L5S

S

MGE135

3

2

1

L6

S

Page 18: AM/FM radio receiver circuit

March 1994 18

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

Application notes

1. Short circuiting: all pins are short-circuit proof except pin 1 (FM-RFI) with respect to the supply voltage pin.

2. Tuning indicator (at pin 15, IND): connect either a tuning indicator (e.g. a LED) between this pin and the supplyvoltage (pin 16) or connect the pin IND to ground.

3. For an example of PC-board layout: see Figs 6 and 7.

L7 FM-AERIAL print-coil

L1-2 = 60 nH

N1-2 = 2.5 turns

L8 AM-RF test circuit only:

L1-3 = 40 µH

N1-3 = 34 turns

unloaded Q = 85

wire diameter 0.09 mm

TOKO type 7P

material TOKO 7BRS

Ceramic filters

K1 FM-IF1 Murata SFE 10.7 MS 3

K2 FM-IF2 Murata SFE 10.7 MS 2

K3 FM-DET Murata CDA 10.7 MC 40

Capacitors

C1 VARICON AM: 140/82 pF

FM: 2 × 20 pF

trimmer: 4 × 8 pF

TOKO type no. HU-22124

MGE136

L8

3

1S

Page 19: AM/FM radio receiver circuit

March 1994 19

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

Fig.8 Typical AM audio output voltage (VAF; signal at m = 0.3), noise, THD (at m = 0.3) and indicator current(level) as a function of RF input voltage (Vin1; f = 1 kHz). Measured in test circuit of Fig.4 with VP = 3.0 V.

handbook, full pagewidth0

10−1 102 103 104 105Vin1 (µV)

1061 10

VAF (dB) 0 dB = 45 mV

MGE111

−10

−20

−30

−40

−50

−60

−70

level (mA) THD (%)

7

6

5

4

3

2

1

0

noise m = 0

signal m = 0.3

THD m = 0.3

level

Page 20: AM/FM radio receiver circuit

March 1994 20

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

Fig.9 Typical AM audio output voltage (VAF; signal at m = 0.3), noise, THD (at m = 0.3) and indicator current(level) as a function of field-strength (f = 1 kHz). Measured at 1 MHz in application circuit of Fig.5 withVP = 3 V.

handbook, full pagewidth0

1 102 103 104 105

field-strength (µV)106 10710

VAF (dB) 0 dB = 45 mV

MGE112

−10

−20

−30

−40

−50

−60

−70

level (mA) THD (%)

7

6

5

4

3

2

1

0

noise m = 0

signal m = 0.3

THD m = 0.3

level

Page 21: AM/FM radio receiver circuit

March 1994 21

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

Fig.10 Typical FM audio output voltage (VAF; signal), noise, THD and indicator current (ind) as a function of RFinput voltage (Vin3; df = 22.5 kHz). Measured in test circuit of Fig.4 at VP = 3 V.

handbook, full pagewidth0

10−1 102 103 104 105Vin3 (µV)

1061 10

VAF (dB) 0 dB = 65 mV

MGE113

−10

−20

−30

−40

−50

−60

−70

ind (mA) THD (%)

7

6

5

4

3

2

1

0

THD 22.5 kHz

signal

noise ind

Page 22: AM/FM radio receiver circuit

March 1994 22

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

PACKAGE OUTLINES

UNIT b1 c E e MHL

REFERENCESOUTLINEVERSION

EUROPEANPROJECTION ISSUE DATE

IEC JEDEC EIAJ

mm

DIMENSIONS (mm are the original dimensions)

SOT234-192-11-1795-02-04

b max.wMEe1

1.30.8

0.530.40

0.320.23

22.321.4

9.18.7

3.22.8 0.181.778 10.16

10.710.2

12.210.5 1.64.7 0.51 3.8

MH

c(e )1

ME

A

L

seat

ing

plan

e

A1

w Mb1

e

D

A2

Z

24

1

13

12

b

E

pin 1 index

0 5 10 mm

scale

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

(1) (1)D(1)ZA

max.1 2A

min.A

max.

SDIP24: plastic shrink dual in-line package; 24 leads (400 mil) SOT234-1

Page 23: AM/FM radio receiver circuit

March 1994 23

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

UNITA

max. A1 A2 A3 bp c D (1) E (1) (1)e HE L Lp Q Zywv θ

REFERENCESOUTLINEVERSION

EUROPEANPROJECTION ISSUE DATE

IEC JEDEC EIAJ

mm

inches

2.65 0.300.10

2.452.25

0.490.36

0.320.23

15.615.2

7.67.4 1.27

10.6510.00

1.11.0

0.90.4 8

0

o

o

0.25 0.1

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

Note

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

1.10.4

SOT137-1

X

12

24

w M

θ

AA1

A2

bp

D

HE

Lp

Q

detail X

E

Z

c

L

v M A

13

(A )3

A

y

0.25

075E05 MS-013AD

pin 1 index

0.10 0.0120.004

0.0960.089

0.0190.014

0.0130.009

0.610.60

0.300.29 0.050

1.4

0.0550.420.39

0.0430.039

0.0350.0160.01

0.25

0.01 0.0040.0430.0160.01

92-11-1795-01-24

e

1

0 5 10 mm

scale

SO24: plastic small outline package; 24 leads; body width 7.5 mm SOT137-1

Page 24: AM/FM radio receiver circuit

March 1994 24

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

SOLDERING

Introduction

There is no soldering method that is ideal for all ICpackages. Wave soldering is often preferred whenthrough-hole and surface mounted components are mixedon one printed-circuit board. However, wave soldering isnot always suitable for surface mounted ICs, or forprinted-circuits with high population densities. In thesesituations reflow soldering is often used.

This text gives a very brief insight to a complex technology.A more in-depth account of soldering ICs can be found inour “IC Package Databook” (order code 9398 652 90011).

SDIP

SOLDERING BY DIPPING OR BY WAVE

The maximum permissible temperature of the solder is260 °C; solder at this temperature must not be in contactwith the joint for more than 5 seconds. The total contacttime of successive solder waves must not exceed5 seconds.

The device may be mounted up to the seating plane, butthe temperature of the plastic body must not exceed thespecified maximum storage temperature (Tstg max). If theprinted-circuit board has been pre-heated, forced coolingmay be necessary immediately after soldering to keep thetemperature within the permissible limit.

REPAIRING SOLDERED JOINTS

Apply a low voltage soldering iron (less than 24 V) to thelead(s) of the package, below the seating plane or notmore than 2 mm above it. If the temperature of thesoldering iron bit is less than 300 °C it may remain incontact for up to 10 seconds. If the bit temperature isbetween 300 and 400 °C, contact may be up to 5 seconds.

SO

REFLOW SOLDERING

Reflow soldering techniques are suitable for all SOpackages.

Reflow soldering requires solder paste (a suspension offine solder particles, flux and binding agent) to be appliedto the printed-circuit board by screen printing, stencilling orpressure-syringe dispensing before package placement.

Several techniques exist for reflowing; for example,thermal conduction by heated belt. Dwell times varybetween 50 and 300 seconds depending on heatingmethod. Typical reflow temperatures range from215 to 250 °C.

Preheating is necessary to dry the paste and evaporatethe binding agent. Preheating duration: 45 minutes at45 °C.

WAVE SOLDERING

Wave soldering techniques can be used for all SOpackages if the following conditions are observed:

• A double-wave (a turbulent wave with high upwardpressure followed by a smooth laminar wave) solderingtechnique should be used.

• The longitudinal axis of the package footprint must beparallel to the solder flow.

• The package footprint must incorporate solder thieves atthe downstream end.

During placement and before soldering, the package mustbe fixed with a droplet of adhesive. The adhesive can beapplied by screen printing, pin transfer or syringedispensing. The package can be soldered after theadhesive is cured.

Maximum permissible solder temperature is 260 °C, andmaximum duration of package immersion in solder is10 seconds, if cooled to less than 150 °C within6 seconds. Typical dwell time is 4 seconds at 250 °C.

A mildly-activated flux will eliminate the need for removalof corrosive residues in most applications.

REPAIRING SOLDERED JOINTS

Fix the component by first soldering two diagonally-opposite end leads. Use only a low voltage soldering iron(less than 24 V) applied to the flat part of the lead. Contacttime must be limited to 10 seconds at up to 300 °C. Whenusing a dedicated tool, all other leads can be soldered inone operation within 2 to 5 seconds between270 and 320 °C.

Page 25: AM/FM radio receiver circuit

March 1994 25

Philips Semiconductors Product specification

AM/FM radio receiver circuit TEA5710; TEA5710T

DEFINITIONS

LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of theseproducts can reasonably be expected to result in personal injury. Philips customers using or selling these products foruse in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from suchimproper use or sale.

Data sheet status

Objective specification This data sheet contains target or goal specifications for product development.

Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.

Product specification This data sheet contains final product specifications.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one ormore of the limiting values may cause permanent damage to the device. These are stress ratings only and operationof the device at these or at any other conditions above those given in the Characteristics sections of the specificationis not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.