Philips TDA1596T User Manual

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INTEGRATED CIRCUITS

DATA SH EET

TDA1596T

IF amplifier/demodulator for FM radio receivers

Product speciﬁcation File under Integrated Circuits, IC01

April 1991

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio

TDA1596T

receivers

GENERAL DESCRIPTION

The TDA1596T provides IF amplification, symmetrical quadrature demodulation and level detection for quality home and car FM radio receivers and is suitable for both mono and stereo reception. It may also be applied to common front-ends, stereo decoders and AM receiver circuits.

Features

• Simulates behaviour of a ratio detector (internal field strength and detuning-dependent voltage for dynamic AF signal muting)

• Mono/stereo blend and field strength indication control voltage

• Three-state mode switch for FM, mute-on / FM, mute-off / FM-off

• Internal compensation of AF signal total harmonic distortion (THD)

• Two open collector stop pulse outputs for microcomputer tuning control (can be one stop pulse output by

wired-ANDing)

• Internal reference voltage source

• Built-in hum and ripple rejection circuits.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

4(rms)

S/N Signal-to-noise ratio V

Supply voltage (pin 1) 7.5 8.5 12.0 V Supply current (pin 1) VP= 8.5 V; I2= I7= 0 mA − 20 26 mA AF output voltage (RMS value) V

= 10 mV 180 200 220 mV

20(rms)

= 10 mV; fm= 400 Hz;

20(rms)

− 82 − dB

∆f = 75 kHz

THD Total harmonic distortion V

= 10 mV; fm= 1 kHz;

20(rms)

− 0.1 0.3 % I7= 0 mA; ∆f = 75 kHz; FM mute on; without de-emphasis; without detuning

amb

Operating ambient temperature

−40 −+85 °C

range

PACKAGE OUTLINE

20-lead mini-pack; plastic (SO20; SOT163A); SOT163-1; 1996 August 12.

April 1991 2

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

April 1991 3

Fig.1 Block diagram and application circuit.

minimum 2nd harmonic distortion at pin 4.

(1) Connecting pin 13 to ground is only allowed for measuring the current at pin 16. It is not for use in application.

(2) In the FM, mute-on condition the unweighted level detector output is available from pin 3. In the FM, mute-off condition the variable resistor at pin 3 can be adjusted for

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

PINNING

1V 2 LVA level voltage adjustment 3 ULV unweighted level output/K2 adjustment 4 AF0 AF output 5V 6 WLV weighted level voltage output 7 MSW mode switch 8 DDV detune detector voltage 9 n.c. not connected 10 DMI1 demodulator input 1 11 DMI2 demodulator input 2 12 n.c. not connected 13 TSW tau switch 14 ST1 stop pulse output 1 15 ST0 stop pulse output 0 16 MTV mute voltage 17 GND ground 18 LFD1 IF limiter feedback 1 19 LFD2 IF limiter feedback 2 20 IFI IF input

ref

supply voltage

reference voltage output

TDA1596T

Fig.2 Pinning diagram.

April 1991 4

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio

TDA1596T

receivers

FUNCTIONAL DESCRIPTION Limiter-ampliﬁer

This has five stages of IF amplification using balanced differential limiter-amplifiers with emitter--follower coupling. Decoupling of the stages from the voltage supply lines and an internal high-ohmic DC feed-back loop give a very stable IF performance. The amplifier gain is virtually independent from temperature changes.

FM demodulator

The demodulator is fully balanced and comprises two cross-coupled differential amplifiers. Quadrature detection of the FM signal is performed by feeding one differential amplifier directly from the limiter--amplifier output, and the other via an external 90° phase-shifting network. The demodulator has good stability and its zero cross-over shift is small. The bandwidth of the demodulator output is restricted to approximately 1 MHz by an internal low-pass filter.

THD compensation

This circuit compensates non-linearities introduced by demodulation. For this to operate correctly the demodulator circuit between pins 10 and 11 must have a loaded Q-factor of 19. Consequently there is no need for the demodulator tuned circuit to be adjusted for minimum THD, instead the adjustment criterium is for a symmetrical stop pulse.

Mute attenuator and AF output

The control voltage for the mute attenuator at pin 16 is generated from the values of the level detector and the detuning detector outputs. The mute attenuator has a fast attack and a slow decay which is determined by the capacitor at pin 16. The AF signal is passed via the mute attenuator to the output at pin 4.

A weighted control voltage, available from pin 6, is obtained from the mute attenuator control voltage via a buffer-amplifier which introduces an additional voltage shift and gain.

Level detector

The level detector generates a voltage output which is proportional to the field strength of the input signal. The unweighted level detector output is available when the mode switch is operating in the FM, mute-on condition.

Tuning-stop outputs

The open collector outputs STOP-0 and STOP-1 (from pins 15 and 14 respectively) are voltages derived from the detuning level and the field strength of the input signal. If only one tuning-stop output is required, pins 14 and 15 may be tied together.

April 1991 5

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio

TDA1596T

receivers

RATINGS

Limiting values in accordance with the Absolute Maximum System (IEC 134)

SYMBOL PARAMETER MIN. MAX. UNIT

= V

1-17

5-17

2-17

7-17

13-17

3-17

15-17

14-17

stg

amb

Supply voltage (pin 1) −0.3 +16 V Reference voltage range (pin 5) −0.3 + 10 V Level adjustment range (pin 2) −0.3 + 10 V Mode switch voltage range (pin 7) −0.3 V

Control input voltage range (pin 13) −+6V THD compensation/unweighted ﬁeld

strength voltage range (pin 3) −0.3 V

Tuning-stop output voltage range

STOP-0 (pin 15) −0.3 V STOP-1 (pin 14) −0.3 V

P P

Tuning-stop output current

STOP-0 (pin 15) − 2mA

STOP-1 (pin 14) − 2mA Storage temperature range −55 + 150 °C Operating ambient temperature range −40 + 85 °C Electrostatic handling

(1)

all pins except pins 5 and 6 −2000 + 2000 V

pin 5 −2000 + 900 V

pin 6 −2000 + 1600 V

V V

Note

1. Equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor.

THERMAL RESISTANCE

From junction to ambient (in free air) R

th j-a (max.)

= 95 K/W

April 1991 6

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio

TDA1596T

receivers

CHARACTERISTICS

f = 10.7 MHz; V

= V

10, 11 aligned for symmetrical stop pulses; all voltages are referred to ground (pin 17), unless otherwise speciﬁed

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

Supplies

= V

Supply voltage 7.5 8.5 12.0 V Supply current at I2= I7= 0 mA − 20 26 mA

FM demodulator

R C V

10-11 10-11

Input impedance 25 40 55 kΩ

DC output voltage (no-signal condition) at V

4-17

Output impedance − 400 −Ω

Mute attenuator control voltage

Control voltage (pin 16)

R V

10-17

Output impedance (pin 16) −−2.0 MΩ Level shift input (pin 2) internal bias voltage at

I2= 0 mA

2-17

Internal muting (Fig.6)

Internal attenuation of signals ± 22.5 kHz ≤ detuning ≤ ±80 kHz;

A = 20log[∆V4(FM mute-off)/∆V4(FM)] A at V A at V A at V

= 8.5 V; VI = V

1-17

20 (rms)

= 1 mV; T

= 25 °C; measured in the circuit of Fig.3; tuned circuit at pins

amb

− 6 − pF

2.75 3.10 3.45 V

10, 11(p-p)

at V

20(rms)

at V

20(rms)

≤ 100 µV; V

≤ 5 µV − 2.0 − V

= 1 mV − 3.45 − V

20(rms)

≤ 5 µV

− 1.4 − V

input impedance 15 −−kΩ

≥ 1 V

= 0.77 V

= 0.55 V

5 5

− 0 − dB

1.5 3.0 4.5 dB

− 20 − dB

April 1991 7

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio

TDA1596T

receivers

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

Attack and decay (pin 16)

Pin 13 connected to ground * +I

−I

Level detector

V6∆

-------------V

T∆

∆

---------------------------20 V

log∆

charge current − 8 −µA discharge current − 120 −µA

Pin 13 connected to V

ref

charge current − 100 −µA discharge current − 120 −µA

Dependence of output voltage on temperature − 3.3 − mV/VK

Output impedance −−500 Ω

Dependence of output voltage (pin 6) on input voltage

(pin 20) (Fig.7):

V V

Slope of output voltage (pin 6) for input voltage range

20(rms)

≤ 5 µV; I2= I7= 0 mA 0.1 0.7 1.3 V

20(rms)

= 1 mV; I2= I7= 0 mA 3.0 3.6 4.2 V

20(rms)

1.4 1.7 2.0 V/20 dB

≥50 µV to V

20(rms)

≤50 mV

Dependence of output voltage (pin 6) on detuning

(Fig.8) at input voltage V ∆V

±∆f detuning for V V

/∆f| Slope of output voltage with detuning = 125 ± 20 kHz

|∆V

detuning = ≤ ±45 kHz −−0.2 V

= 1.8 V 90 − 160 kHz

detuning = ±200 kHz 0.5 0.7 0.9 V

at V

20(rms)

= 10 mV

20(rms)

= 10 mV:

− 35 − mV/kHz

Level shift control (pin 2) (Fig.9) ±∆V

/∆V2) adjustment gain − 1.7 − V

−(∆V

adjustment range 1.6 2.0 − V

output voltage at V2= V5; V

≤ 5 µV −−0.3 V

20(rms)

Low-pass ﬁlter at pin 8

= 0 mA;

V R

8(int)

Output voltage at I

≤ 5 µV − 2.2 − V

20(rms)

Internal resistance 12 25 50 kΩ

April 1991 8

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio

TDA1596T

receivers

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

Tuning-stop detector (Figs 10 and 11)

Stop-0: detuning at V

+∆f for V +∆f for V

≥ 3.5 V −−10 kHz

≤ 0.3 V 18 −−kHz

Stop-1: detuning at V

−∆f for V

≥ 3.5 V −−10 kHz

≤ 0.3 V 18 −−kHz

Dependence of STOP-0, STOP-1 on

input voltage (pin 20) input voltage (RMS value) for

20(rms)

V14= V15≥ 3.5 V 250 −−µV input voltage (RMS value) for

20(rms)

V14= V15≤ 0.3 V −−50 µV

Output voltage when V

14, 15

I14= I15= 1 mA −−0.3 V

Mode switch and pin 3 (Fig.12)

20(rms)

= 10 mV

FM-off position

Control voltage for 60 dB V

muting depth −−1.4 V

FM, mute-on position (pin 3 = output)

Internal bias voltage at

| Input current −−2.5 µA

≥ 10 MΩ−2.8 − V

7-17

Output voltage with

= 10 kΩ; C

3-17

Output impedance for V R

3-17

I3= 500µA −−100 Ω

≥ 1 nF* − 2 − V

3-17

= ≤ 5 µV;

FM, mute-off position (pin 3 = input)

3-17

Control voltage 0.9 V

Input current at V7= V

−−15 µA

−−V

Input resistance 1 −−MΩ

Reference voltage source

V ∆V

5/I5

Output voltage at I5= −1 mA 3.3 3.7 4.1 V

Output impedance at I5= −1 mA − 40 80 Ω TC Temperature coefﬁcient − 3.3 − mV/K

* Connecting pin 13 to ground is only allowed for measuring the current at pin 16. It is not for use in application. * Without input voltage.

April 1991 9

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio

TDA1596T

receivers

OPERATING CHARACTERISTICS

f = 10.7 MHz; V

= V

= 50 µs; test circuit as per Fig.3; tuned circuit (Q otherwise speciﬁed

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

4(rms)

AF output voltage (RMS value) at V

20(rms)

Start of limiting (FM, mute-off); (RMS value) (Fig.13)

Dependence of signal-to-noise ratio (in noise frequency band 250 Hz to 15 kHz, unweighted) on input voltage

18(rms)

S/N at V THD THD (FM, mute-on) at V

kHz; fm= 1 kHz; without detuning; without de-emphasis; I7= 0 mA

∆f Slope of attenuation curve − 0.8 − dB/kHz

Dynamic mute attenuation (Fig.14) − 16 − dB

THD (FM, mute-on) at V

THD de-emphasis; I

THD (FM, mute-off and compensated via

THD V V

Voltage range at pin 3 for THD compensation 0 − V AM suppression (FM, mute-off) with amplitude

modulation at 30% input voltage range V

Power supply ripple rejection = 20log [∆V Mute attenuation (FM-off)

= 20log [V

= 1 mV; deviation (∆f) = 22.5 kHz; modulation frequency (fm) = 400 Hz; de-emphasiss (pin 4)

20(rms)

= 19) aligned for symmetrical stop pulses; T

= + 25 °C; unless

amb

180 200 220 mV

= 10 mV

20(rms)

14 22 35 µV

for S/N = 26 dB − 15 −µV for S/N = 46 dB − 60 −µV

= 10 mV; ∆f = 75 kHz − 82 − dB

20(rms)

αD20

---------------------------------------------------------log=

20(rms)

FM mute off)–(

FM mute,( on )–

= 10 mV; ∆f = 75

− 0.1 0.3 %

with fm= 100 kHz; ∆f = 75 kHz

= 10 mV;

20(rms)

∆f = 75 kHz; f

= 1 kHz;

detuning ≤± 25 kHz without

= 0 mA (Fig.15) −−0.6 %

pin 3) at V ∆f = 75 kHz; f

= V

20(rms)

= 10 mV;

= 1 kHz;

− 0.07 0.25 %

− 65 − dB

= 300 µV to 100 mV (Fig.16)

/∆V4]33 36 − dB

60 −−dB

4(FM-on/V4(FM-off)

]

April 1991 10

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

Fig.3 Test circuit.

April 1991 11

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

Fig.4 Printed-circuit board component side, showing component layout. For circuit diagram see Fig.3.

Fig.5 Printed-circuit board showing track side.

April 1991 12

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

Fig.6 Typical curve of internal attenuation showing the relationship between the mute attenuator control voltage

(pin 16) and mute attenuation; I2 = I7 = 0 mA

Fig.7 Weighted field strength output voltage (pin 6) as a function of input voltage (pin 20); R

I2=I7= 0 mA.

April 1991 13

≥ 10 kΩ;

6-17

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

Fig.8 Weighted field strength output voltage (pin 6) as a function of detuning; R

V20= 10 mV.

≥ 10 kΩ; I2= I7= 0 mA;

6-17

Fig.9 Adjustment range of weighted field strength output voltage (pin 6) with level shift control (pin 2);

≥ 10 kΩ; I7= 0 mA.

6-17

April 1991 14

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

(a) STOP-0.

(b) STOP-1.

Fig.10 STOP-0 and STOP-1 output voltages as a function of detuning, measured at V20= 10 mV.

April 1991 15

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

Fig.11 STOP-0 or STOP-1 output voltages as a function of input voltage at pin 20.

Fig.12 Switch levels at pin 7.

April 1991 16

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

(a) mode switch at FM, mute-on

(b) mode switch at FM, mute-off

Fig.13 Audio signal (∆f = 22.5 kHz; fm= 1 kHz) and noise as functions of input voltage at pin 20; measured with

50 µs de-emphasis.

April 1991 17

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

Fig.14 Dynamic mute attenuation as a function of frequency deviation for modulation frequencies of 40, 60, 80

and 100 kHz.

Fig.15 THD as a function of detuning, mode switch at FM, mute-on position; ∆f = 75 kHz; fm= 1 kHz;

April 1991 18

20(rms)

= 10 mV.

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

TDA1596T

(a) mode switch at FM, mute-on

(b) mode switch at FM, mute-off

Fig.16 Typical curves showing AM suppression for an input signal having frequency modulation at ∆f = 22.5 kHz

and fm= 1 kHz, and amplitude modulation of 30% at a frequency of 400 Hz; de-emphasis time = 50µs and bandwidth = 250 Hz to 15 kHz.

April 1991 19

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

PACKAGE OUTLINE

SO20: plastic small outline package; 20 leads; body width 7.5 mm

TDA1596T

SOT163-1

v M

pin 1 index

0 5 10 mm

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

UNIT

inches

Note

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

max.

2.65

0.10

0.30

0.10

0.012

0.004

A2A

2.45

2.25

0.096

0.089

0.25

0.01

0.49

0.36

0.32

0.23

0.013

0.009

0.019

0.014

w M

scale

(1)E(1) (1)

13.0

12.6

0.51

0.49

eHELLpQ

7.6

1.27

7.4

0.30

0.050

0.29

10.65

10.00

0.42

0.39

1.4

0.055

1.1

0.4

0.043

0.016

detail X

1.1

1.0

0.043

0.039

(A )

0.25

0.01

0.25 0.1

0.01

ywv θ

0.9

0.4

0.004

0.035

0.016

o o

OUTLINE VERSION

SOT163-1

IEC JEDEC EIAJ

075E04 MS-013AC

REFERENCES

April 1991 20

EUROPEAN

PROJECTION

ISSUE DATE

92-11-17 95-01-24

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio receivers

SOLDERING Introduction

There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations 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 in

“IC Package Databook”

our

Reﬂow soldering

Reflow soldering techniques are suitable for all SO packages.

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

Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 °C.

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

(order code 9398 652 90011).

TDA1596T

Wave soldering

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

• A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used.

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

• The package footprint must incorporate solder thieves at the downstream end.

During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured.

Maximum permissible solder temperature is 260 °C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 °C within 6 seconds. Typical dwell time is 4 seconds at 250 °C.

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

Repairing soldered joints

Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 °C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 °C.

April 1991 21

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio

TDA1596T

receivers

DEFINITIONS

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 or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the speciﬁcation is 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.

LIFE SUPPORT APPLICATIONS

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

April 1991 22

Philips TDA1596T User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

GENERAL DESCRIPTION

Features

QUICK REFERENCE DATA

PACKAGE OUTLINE

PINNING

FM demodulator

THD compensation

Mute attenuator and AF output

Level detector

Tuning-stop outputs

RATINGS

THERMAL RESISTANCE

CHARACTERISTICS

OPERATING CHARACTERISTICS

PACKAGE OUTLINE

SOT163-1

Wave soldering

Repairing soldered joints

DEFINITIONS

LIFE SUPPORT APPLICATIONS